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Johansson, Ann-ChristineORCID iD iconorcid.org/0000-0001-9126-0155
Publikasjoner (10 av 22) Visa alla publikasjoner
Dimitriadis, A., Bergvall, N., Johansson, A.-C., Sandström, L., Bezergianni, S., Tourlakidis, N., . . . Raymakers, L. (2023). Biomass conversion via ablative fast pyrolysis and hydroprocessing towards refinery integration: Industrially relevant scale validation. Fuel, 332, Article ID 126153.
Åpne denne publikasjonen i ny fane eller vindu >>Biomass conversion via ablative fast pyrolysis and hydroprocessing towards refinery integration: Industrially relevant scale validation
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2023 (engelsk)Inngår i: Fuel, ISSN 0016-2361, E-ISSN 1873-7153, Vol. 332, artikkel-id 126153Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Reducing the use of fossil fuels is an ongoing and important effort considering the environmental impact and depletion of fossil-based resources. The combination of ablative fast pyrolysis and hydroprocessing is explored as a pathway allowing bio-based intermediates (BioMates) integration in underlying petroleum refineries. The proposed technology is validated in industrially relevant scale, identifying pros and cons towards its commercialization. Straw from wheat, rye and barley was fed to ablative fast pyrolysis rendering Fast Pyrolysis Bio-Oil (FPBO) as the main product. The FPBO was stabilized via slurry hydroprocessing, rendering a stabilized FPBO (sFPBO) with 49 % reduced oxygen content, 71 % reduced carbonyl content and 49 % reduced Conradson carbon residue. Fixed bed catalytic hydroprocessing of sFPBO resulted in the production of BioMates, a high bio-content product to be co-fed in established refinery units. Compared to the starting biomass, BioMates has 83.6 wt% C content increase, 92.5 wt% O content decrease, 93.0 wt% water content decrease, while the overall technology has 20 wt% conversion yield (32 wt% carbon yield) from biomass to BioMates. © 2022 The Author(s)

sted, utgiver, år, opplag, sider
Elsevier Ltd, 2023
Emneord
Green fuel, Hydrodeoxygenation, Hydroprocessing, Refinery intermediate, Straw, pyrolysis bio-oil, Bioconversion, Carbon, Environmental impact, Fossil fuels, Pyrolysis, Refining, Bio-based, Biomass conversion, Fast pyrolysis, Fast pyrolysis bio-oil, Pyrolysis bio-oil, Straw, pyrolyse bio-oil, Biomass
HSV kategori
Identifikatorer
urn:nbn:se:ri:diva-61190 (URN)10.1016/j.fuel.2022.126153 (DOI)2-s2.0-85139857301 (Scopus ID)
Merknad

 Funding details: Horizon 2020 Framework Programme, H2020; Funding details: Horizon 2020, 2022, 727463; Funding text 1: The authors wish to express their appreciation for the financial support provided by European Union’s Horizon 2020 research and innovation program under grant agreement No 727463 for the project “BIOMATES”.; Funding text 2: The authors wish to express their appreciation for the financial support provided by European Union's Horizon 2020 research and innovation program under grant agreement No 727463 for the project “BIOMATES”. 

Tilgjengelig fra: 2022-12-06 Laget: 2022-12-06 Sist oppdatert: 2023-05-26bibliografisk kontrollert
Johansson, A.-C., Sott, R. & Mattsson, C. (2023). Comparative study of thermochemical recycling with solvolysis and pyrolysis of End-of-Life wind turbine blades: Rekovind2 - WP3.
Åpne denne publikasjonen i ny fane eller vindu >>Comparative study of thermochemical recycling with solvolysis and pyrolysis of End-of-Life wind turbine blades: Rekovind2 - WP3
2023 (engelsk)Rapport (Annet vitenskapelig)
Abstract [en]

There is an urgent need for the development of viable recycling solutions for the increasing waste streams of glass fiber composites (GFRPs) from all sectors i.e. leisure boats, windmills and building constructions. Two potential recycling methods that can separate and recover both the polymers and the high-quality fibers from these kinds of materials are pyrolysis and solvolysis. In this project recycling of an epoxy-based Endof-Life wind turbine blade was evaluated in lab scale using the two methods. In previous literature the main focus has been on the quality of the fibers but in this project the main focus was to compare the chemical composition of the oil products. The produced oils from solvolysis and pyrolysis have been compared with a multianalysis approach by using elemental analysis, GC-MS, pyro-GC-MS/FID, 2D NMR (HSQC) for gaining more information about the chemical structure of the produced monomers (phenols), oligomers and polymers. Almost all the volatile matter in the End-of-Life wind turbine blade was recovered as pyrolysis oil, 36 wt.% yield. The solvolysis oil yield was lower, 17 wt.%, mainly due to a major part of the solvolysis oil ended up in the aqueous solvent. The composition of the oils from both technologies was analyzed based on both their volatile i.e. monomeric and polymeric content. The result point to that both methods produced oils with similar polymeric parts according to NMR and pyro-GC-MS/FID, based on an oxygenated aliphatic network connected with aromatic phenolic structures. Increased information of chemical oil composition will be useful for further processing as raw material in refineries/chemical industries. The monomeric part of the oil produced from pyrolysis was found in relatively large amounts, ~57 wt.%, and can be a future high-value product from recycling of wind turbine blades. The total recovery of phenolics from the pyrolysis was 18 wt.% of the wind turbine blade weight.

Publisher
s. 56
Emneord
Recycling of composites, glass fiber composites, GFRP, thermochemical recycling, solvolysis, hydrothermal liquification, HTL, pyrolysis, End-of-Life (EOL) wind turbine blades, epoxy thermoset, 2D NMR, HSQC, pyrolysis-GC-MS, oil quality
HSV kategori
Identifikatorer
urn:nbn:se:ri:diva-65657 (URN)
Merknad

Project name ” Rekovind2 - Digitalization of wind blade streams before reuse and recycling”, Swedish Energy Agency project number 47044-2, Dnr 2021-029795, RISE Project  P113615-1

Tilgjengelig fra: 2023-07-05 Laget: 2023-07-05 Sist oppdatert: 2023-07-05bibliografisk kontrollert
Johansson, A.-C., Bergvall, N., Molinder, R., Wikberg, E., Niinipuu, M. & Sandström, L. (2023). Comparison of co-refining of fast pyrolysis oil from Salix via catalytic cracking and hydroprocessing. Biomass and Bioenergy, 172, Article ID 106753.
Åpne denne publikasjonen i ny fane eller vindu >>Comparison of co-refining of fast pyrolysis oil from Salix via catalytic cracking and hydroprocessing
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2023 (engelsk)Inngår i: Biomass and Bioenergy, ISSN 0961-9534, E-ISSN 1873-2909, Vol. 172, artikkel-id 106753Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Lignocellulosic biomass from energy crops, i.e., short rotation coppice willows such as Salix spp., can be used as feedstock for production of transportation biofuels. Biomass conversion via fast pyrolysis followed by co-refining with fossil oil in existing refinery infrastructure could enable a fast introduction of large-scale production of biofuels. In this study, Salix was first liquefied using ablative fast pyrolysis in a pilot scale unit. The resulting pyrolysis oil, rich in oxygenates, was thereafter co-refined in 20 wt% ratio with fossil feedstock using two separate technologies, a fluidized catalytic cracking (FCC) laboratory unit and a continuous slurry hydroprocessing pilot plant. In the FCC route, the pyrolysis oil was cracked at 798 K using a commercial FCC catalyst at atmospheric pressure, while in the hydroprocessing route, the oil was processed at 693 K and a hydrogen pressure of 15 MPa in the presence of an unsupported molybdenum sulfide catalyst. Both routes resulted in significant deoxygenation (97 wt% versus 93 wt%). It is feasible to co-refine pyrolysis oil using both methods, the main difference being that the hydroprocessing results in a significantly higher biogenic carbon yield from the pyrolysis oil to liquid and gaseous hydrocarbon products (92 wt%) but would in turn require input of H2. In the cracking route, besides the liquid product, a significant part of the biogenic carbon ends up as gas and as coke on the catalyst. The choice of route depends, among other factors, on the available amount of bio-oil and refining infrastructures. © 2023 The Authors

sted, utgiver, år, opplag, sider
Elsevier Ltd, 2023
Emneord
Biofuels, Co-refining, Fast pyrolysis, Fluidized catalytic cracking, Hydroprocessing, Salix, Atmospheric pressure, Bioconversion, Carbon, Catalysts, Crops, Feedstocks, Fluidization, Fluidized beds, Molybdenum compounds, Pilot plants, Refining, Sulfur compounds, Biogenics, Fast pyrolysis oil, Fluidized catalytic crackings, Lignocellulosic biomass, Pyrolysis oil, ]+ catalyst, biofuel, catalyst, cracking (fracture), pyrolysis, refining industry
HSV kategori
Identifikatorer
urn:nbn:se:ri:diva-64320 (URN)10.1016/j.biombioe.2023.106753 (DOI)2-s2.0-85150046232 (Scopus ID)
Merknad

 Correspondence Address: Johansson, A.-C.; RISE AB, Box 726, Piteå, Sweden; email: ann-christine.johansson@ri.se; Funding details: Svenska Forskningsrådet Formas, 2016-20031; Funding text 1: This study was supported by the Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning (Formas) under the grant number 2016-20031 . 

Tilgjengelig fra: 2023-05-08 Laget: 2023-05-08 Sist oppdatert: 2024-03-04bibliografisk kontrollert
Shafaghat, H., Linderberg, M., Janosik, T., Hedberg, M., Wiinikka, H., Sandström, L. & Johansson, A.-C. (2022). Enhanced Biofuel Production via Catalytic Hydropyrolysis and Hydro-Coprocessing. Energy & Fuels, 36(1), 450-462
Åpne denne publikasjonen i ny fane eller vindu >>Enhanced Biofuel Production via Catalytic Hydropyrolysis and Hydro-Coprocessing
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2022 (engelsk)Inngår i: Energy & Fuels, ISSN 0887-0624, E-ISSN 1520-5029, Vol. 36, nr 1, s. 450-462Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

In order to successfully integrate biomass pyrolysis oils as starting materials for conventional oil refineries, upgrading of the pyrolysis oils is needed to achieve desired properties, something which can be performed either as part of the pyrolysis process and/or by separate catalytic treatment of the pyrolysis intermediate oil products. In this study, the quality of stem wood-derived pyrolysis oil was improved via ex situ catalytic hydropyrolysis in a bench-scale pyrolyzer (stage 1), followed by catalytic hydro-coprocessing with fossil co-feed in a laboratory-scale high pressure autoclave (stage 2). The effect of pyrolysis upgrading conditions was investigated based on the quality of intermediate products and their suitability for hydro-coprocessing. HZSM-5 and Pt/TiO2 catalysts (400 °C, atmospheric pressure) were employed for ex situ pyrolysis, and the NiMoS/Al2O3 catalyst (330 °C, 100 bar H2 initial pressure) was used for hydro-coprocessing of the pyrolysis oil. The application of HZSM-5 in the pyrolysis of stem wood under a N2 atmosphere decreased the formation of acids, ketones, aldehydes, and furans and increased the production of aromatic hydrocarbons and phenolics (guaiacols and phenols). Replacing HZSM-5 with Pt/TiO2 and N2 with H2 resulted in complete conversion of guaiacols and significant production of phenols, with further indications of increased stability and reduced coking tendencies.

sted, utgiver, år, opplag, sider
American Chemical Society, 2022
HSV kategori
Identifikatorer
urn:nbn:se:ri:diva-57373 (URN)10.1021/acs.energyfuels.1c03263 (DOI)2-s2.0-85122002259 (Scopus ID)
Tilgjengelig fra: 2021-12-22 Laget: 2021-12-22 Sist oppdatert: 2023-06-08bibliografisk kontrollert
Rönnberg-Wästljung, A. C., Dufour, L., Gao, J., Hansson, P.-A., Herrmann, A., Jebrane, M., . . . Weih, M. (2022). Optimized utilization of Salix : Perspectives for the genetic improvement toward sustainable biofuel value chains. Global Change Biology Bioenergy, 14(10), 1128-1144
Åpne denne publikasjonen i ny fane eller vindu >>Optimized utilization of Salix : Perspectives for the genetic improvement toward sustainable biofuel value chains
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2022 (engelsk)Inngår i: Global Change Biology Bioenergy, ISSN 1757-1693, E-ISSN 1757-1707, Vol. 14, nr 10, s. 1128-1144Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Abstract Bioenergy will be one of the most important renewable energy sources in the conversion from fossil fuels to bio-based products. Short rotation coppice Salix could be a key player in this conversion since Salix has rapid growth, positive energy balance, easy to manage cultivation system with vegetative propagation of plant material and multiple harvests from the same plantation. The aim of the present paper is to provide an overview of the main challenges and key issues in willow genetic improvement toward sustainable biofuel value chains. Primarily based on results from the research project ?Optimized Utilization of Salix? (OPTUS), the influence of Salix wood quality on the potential for biofuel use is discussed, followed by issues related to the conversion of Salix biomass into liquid and gaseous transportation fuels. Thereafter, the studies address genotypic influence on soil carbon sequestration in Salix plantations, as well as on soil carbon dynamics and climate change impacts. Finally, the opportunities for plant breeding are discussed using willow as a resource for sustainable biofuel production. Substantial phenotypic and genotypic variation was reported for different wood quality traits important in biological (i.e., enzymatic and anaerobic) and thermochemical conversion processes, which is a prerequisite for plant breeding. Furthermore, different Salix genotypes can affect soil carbon sequestration variably, and life cycle assessment illustrates that these differences can result in different climate mitigation potential depending on genotype. Thus, the potential of Salix plantations for sustainable biomass production and its conversion into biofuels is shown. Large genetic variation in various wood and biomass traits, important for different conversion processes and carbon sequestration, provides opportunities to enhance the sustainability of the production system via plant breeding. This includes new breeding targets in addition to traditional targets for high yield to improve biomass quality and carbon sequestration potential.

sted, utgiver, år, opplag, sider
John Wiley & Sons, Ltd, 2022
Emneord
bioethanol, biofuels, biogas, biomass recalcitrance, carbon sequestration, LCA, plant breeding, Salix, tension wood
HSV kategori
Identifikatorer
urn:nbn:se:ri:diva-62455 (URN)10.1111/gcbb.12991 (DOI)2-s2.0-85136253380 (Scopus ID)
Merknad

This project was funded by the Swedish Research Council, FORMAS, grant number 2016-20031.

Tilgjengelig fra: 2023-01-23 Laget: 2023-01-23 Sist oppdatert: 2023-05-09bibliografisk kontrollert
Shafaghat, H., Gulshan, S., Johansson, A.-C., Evangelopoulos, P. & Yang, W. (2022). Selective recycling of BTX hydrocarbons from electronic plastic wastes using catalytic fast pyrolysis. Applied Surface Science, 605, Article ID 154734.
Åpne denne publikasjonen i ny fane eller vindu >>Selective recycling of BTX hydrocarbons from electronic plastic wastes using catalytic fast pyrolysis
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2022 (engelsk)Inngår i: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 605, artikkel-id 154734Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Non-catalytic and catalytic pyrolysis of two waste electrical and electronic equipment (WEEE) fractions, with two different copper contents (low- and medium-grade WEEE named as LGE and MGE, respectively), were performed using micro- and lab-scale pyrolyzers. This research aimed to fundamentally study the feasibility of chemical recycling of the WEEE fractions via pyrolysis process considering molecular interactions at the interfaces of catalyst active sites and WEEE pyrolyzates which significantly influence the chemical functionality of surface intermediates and catalysis by reorganizing the pyrolyzates near catalytic active sites forming reactive surface intermediates. Hence, Al2O3, TiO2, HBeta, HZSM-5 and spent FCC catalysts were used in in-situ micro-scale pyrolysis. Results indicated that HBeta and HZSM-5 zeolites were more suitable than other catalysts for selective production of aromatic hydrocarbons and BTX. High acidity and shape selectivity of zeotype surfaces make them attractive frameworks for catalytic pyrolysis processes aiming for light hydrocarbons like BTX. Meanwhile, the ex-situ pyrolysis of LGE and MGE were carried out using HZSM-5 in micro- and lab-scale pyrolyzers to investigate the effect of pyrolysis configuration on the BTX selectivity. Although the ex-situ pyrolysis resulted in higher formation of BTX from LGE, the in-situ configuration was more efficient to produce BTX from MGE. © 2022 The Author(s)

sted, utgiver, år, opplag, sider
Elsevier B.V., 2022
Emneord
BTX, Catalytic fast pyrolysis, Monoaromatic hydrocarbons, Selective recycling, WEEE, Zeolite solid acids, Alumina, Aluminum oxide, Aromatic hydrocarbons, Catalyst activity, Electronic Waste, Oscillators (electronic), Pyrolysis, Recycling, Titanium dioxide, Catalytic fast pyrolyse, Catalytic pyrolysis, Fast pyrolysis, Monoaromatic hydrocarbon, Pyrolyzers, Solid acid, Waste electrical and electronic equipment, Zeolite solid acid, Zeolites
HSV kategori
Identifikatorer
urn:nbn:se:ri:diva-60149 (URN)10.1016/j.apsusc.2022.154734 (DOI)2-s2.0-85137170603 (Scopus ID)
Merknad

Funding details: Energimyndigheten, 51219-1; Funding text 1: This research was supported by the Swedish Energy Agency via the project number 51219-1. The authors would like to thank Boliden Rönnskär for providing the raw WEEE fractions for this research.

Tilgjengelig fra: 2022-09-29 Laget: 2022-09-29 Sist oppdatert: 2023-05-09bibliografisk kontrollert
Bergvall, N., Molinder, R., Johansson, A.-C. & Sandström, L. (2021). Continuous Slurry Hydrocracking of Biobased Fast Pyrolysis Oil. Energy & Fuels, 35(3), 2303-2312
Åpne denne publikasjonen i ny fane eller vindu >>Continuous Slurry Hydrocracking of Biobased Fast Pyrolysis Oil
2021 (engelsk)Inngår i: Energy & Fuels, ISSN 0887-0624, E-ISSN 1520-5029, Vol. 35, nr 3, s. 2303-2312Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Co-refining of fast pyrolysis bio-oil together with fossil oil in existing refinery infrastructure is an attractive and cost-efficient route to conversion of lignocellulosic biomass to transportation fuel. However, due to large differences in properties between the two oils, special notice is needed to reduce process-related issues. Here, fast pyrolysis bio-oil produced from lignocellulosic biomass was co-refined with vacuum gas oil at a 20:80 weight ratio in continuous operation in a pilot-scale slurry hydrocracker in order to investigate the impact of process parameters on product quality and process performance. Mass balances together with product characterization were used to investigate product yields, product composition, and hydrodeoxygenation. Best conversion and hydrodeoxygenation of the fast pyrolysis bio-oil was achieved using an unsupported catalyst loading of 900 ppm Mo with either a low temperature (410 °C) and long residence time (2 h) or higher temperature (435 °C) and shorter residence time (1 h). These settings resulted in about 94% hydrodeoxygenation but also led to highest yield of biogenic carbon to gas phase (40-43 wt %) and lowest yield of biogenic carbon to oil fractions (53-56 wt %) as well as the water fraction (3-5 wt %). Successfully, coke yield remained low at around 0.07-0.10 wt % for all performed runs, which was comparable to the insoluble particle content in the feed due to the presence of particles in the untreated fast pyrolysis bio-oil. Co-processing pyrolysis oil with fossil oil in a slurry hydrocracker seems to be a robust process with regard to coke formation, which should lead to reduced plugging issues compared to fixed bed hydrotreaters. Although this study gives a brief understanding of the effect of process parameters on the processing of fast pyrolysis bio-oil, further research is required to find optimal process parameters and to fully comprehend the possibilities and limitations for production of transportation fuels from fast pyrolysis bio-oil using this technology.

sted, utgiver, år, opplag, sider
American Chemical Society, 2021
Emneord
Biomass, Carbon, Coke, Fossil fuels, Hydrocracking, Lignocellulosic biomass, Petroleum transportation, Scales (weighing instruments), Temperature, Transportation routes, Continuous operation, Fast pyrolysis bio-oil, Insoluble particles, Process performance, Product characterizations, Product composition, Transportation fuels, Unsupported catalysts, Petroleum refining
HSV kategori
Identifikatorer
urn:nbn:se:ri:diva-52445 (URN)10.1021/acs.energyfuels.0c03866 (DOI)2-s2.0-85100337644 (Scopus ID)
Merknad

 Funding details: Energimyndigheten, 43947-1, 41253-2; Funding text 1: This work was made possible with funding from the Swedish Energy Agency, project no. 41253-2 and project no. 43947-1.

Tilgjengelig fra: 2021-02-18 Laget: 2021-02-18 Sist oppdatert: 2023-05-26bibliografisk kontrollert
Weiland, F., Qureshi, M., Wennebro, J., Lindfors, C., Ohra-Aho, T., Shafaghat, H. & Johansson, A.-C. (2021). Entrained flow gasification of polypropylene pyrolysis oil. Molecules, 26(23), Article ID 7317.
Åpne denne publikasjonen i ny fane eller vindu >>Entrained flow gasification of polypropylene pyrolysis oil
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2021 (engelsk)Inngår i: Molecules, ISSN 1431-5157, E-ISSN 1420-3049, Vol. 26, nr 23, artikkel-id 7317Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Petrochemical products could be produced from circular feedstock, such as waste plastics. Most plants that utilize syngas in their production are today equipped with entrained flow gasifiers, as this type of gasifier generates the highest syngas quality. However, feeding of circular feedstocks to an entrained flow gasifier can be problematic. Therefore, in this work, a two-step process was studied, in which polypropylene was pre-treated by pyrolysis to produce a liquid intermediate that was easily fed to the gasifier. The products from both pyrolysis and gasification were thoroughly characterized. Moreover, the product yields from the individual steps, as well as from the entire process chain, are reported. It was estimated that the yields of CO and H2 from the two-step process were at least 0.95 and 0.06 kg per kg of polypropylene, respectively, assuming that the pyrolysis liquid and wax can be combined as feedstock to an entrained flow gasifier. On an energy basis, the energy content of CO and H2 in the produced syngas corresponded to approximately 40% of the energy content of the polypropylene raw material. This is, however, expected to be significantly improved on a larger scale where losses are proportionally smaller. © 2021 by the authors. 

sted, utgiver, år, opplag, sider
MDPI, 2021
Emneord
Chemical recycling, Gasification, Plastic waste, Pyrolysis, Syngas
HSV kategori
Identifikatorer
urn:nbn:se:ri:diva-57332 (URN)10.3390/molecules26237317 (DOI)2-s2.0-85120819446 (Scopus ID)
Merknad

Export Date: 16 December 2021; Article; CODEN: MOLEF; Correspondence Address: Weiland, F.; RISE Energy Technology Center AB, Box 726, Sweden; email: fredrik.weiland@ri.se; Funding details: Teknologian Tutkimuskeskus VTT; Funding text 1: Funding: This research was funded by RISE Research Institutes of Sweden and VTT Technical Research Centre of Finland, respectively. Additionally, the gasification part of the work received funding from the B4G node of Swedish Gasification Centre (SFC).

Tilgjengelig fra: 2021-12-22 Laget: 2021-12-22 Sist oppdatert: 2023-08-28bibliografisk kontrollert
Johansson, A.-C., Molinder, R., Vikström, T. & Wiinikka, H. (2021). Particle formation during suspension combustion of different biomass powders and their fast pyrolysis bio-oils and biochars. Fuel processing technology, 218, Article ID 106868.
Åpne denne publikasjonen i ny fane eller vindu >>Particle formation during suspension combustion of different biomass powders and their fast pyrolysis bio-oils and biochars
2021 (engelsk)Inngår i: Fuel processing technology, ISSN 0378-3820, E-ISSN 1873-7188, Vol. 218, artikkel-id 106868Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The fly ash formation during suspension combustion of five different biomass powders (stem wood, bark, forest residue, willow, and reed canary grass) and the corresponding products from fast pyrolysis (bio-oil and biochar) of the powders was investigated. The fifteen fuels were burned in a drop tube furnace under normal (20 vol-% O2) and oxygen-enriched combustion conditions (40 vol-% and 60 vol-% O2). The trends in the data were used to discuss differences in combustion behavior and devise recommendations for the use of the fuels. There was a general difference in fly ash formation mechanism between the solid fuels (biomass and biochar) and the bio-oil fuels, which was attributed to parts of the ash-forming elements in bio-oil being dissolved in the oil. Oxygen-enrichment did not affect the release of inorganic elements to the gas phase for bio-oil combustion. Since the bio-oils generate lower fly ash during combustion, ~100 times compared to the original biomasses, they should be reserved for combustion technologies demanding fuels with very low ash content, whereas the biochar should be used in large scale combustion facilities with advanced gas cleaning technology operated by teams with experience of handling ash related operational problems. © 2021 The Author(s)

sted, utgiver, år, opplag, sider
Elsevier B.V., 2021
Emneord
Bio-oil, Biochar, Biomass, Combustion, Fly ash, Particle emissions
HSV kategori
Identifikatorer
urn:nbn:se:ri:diva-53011 (URN)10.1016/j.fuproc.2021.106868 (DOI)2-s2.0-85104980140 (Scopus ID)
Merknad

 Funding details: Energimyndigheten, 39475-1; Funding text 1: This work was founded by the Swedish Energy Agency , project number 39475-1 .

Tilgjengelig fra: 2021-05-26 Laget: 2021-05-26 Sist oppdatert: 2023-05-19bibliografisk kontrollert
Iisa, K., Johansson, A.-C., Pettersson, E., French, R., Orton, K. & Wiinikka, H. (2019). Chemical and physical characterization of aerosols from fast pyrolysis of biomass. Journal of Analytical and Applied Pyrolysis, 142, Article ID 104606.
Åpne denne publikasjonen i ny fane eller vindu >>Chemical and physical characterization of aerosols from fast pyrolysis of biomass
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2019 (engelsk)Inngår i: Journal of Analytical and Applied Pyrolysis, ISSN 0165-2370, E-ISSN 1873-250X, Vol. 142, artikkel-id 104606Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Biomass fast pyrolysis vapors contain a significant quantity of persistent aerosols, which can impact downstream processing by e.g. fouling of surfaces and deposition on downstream catalysts. In this study, aerosol concentrations and size distributions were measured by an impactor in two pyrolysis systems, a bench-scale fluidized-bed pyrolyzer and a pilot-scale cyclone pyrolyzer. In both units, the mass-based mode aerosol diameter was approximately 1 μm before aerosol collection devices in cooled vapors of 300–370 K but the number-based median was < 0.1 μm. Aerosols < 1 μm were formed and aerosols > 1 μm deposited during cooling of pyrolysis vapors from 620 to 370 K in the fluidized-bed pyrolysis system. The oil fraction collected from the aerosols constituted approximately 40 wt% of the total oils collected in both systems. Compared to the total collected oil, the oil fraction from the aerosols was enriched in lignin-derived components and anhydrosugars and had lower concentrations of low molecular weight cellulose derived oxygenates, such as hydroxyketones. 

sted, utgiver, år, opplag, sider
Elsevier B.V., 2019
Emneord
Aerosols, Biomass, Fast pyrolysis, Size distribution, Fluidized beds, Ketones, Pyrolysis, Storms, Aerosol concentration, Bench-scale fluidized bed, Downstream-processing, Fluidized-bed pyrolysis, Fouling of surfaces, Low molecular weight, Physical characterization
HSV kategori
Identifikatorer
urn:nbn:se:ri:diva-38910 (URN)10.1016/j.jaap.2019.04.022 (DOI)2-s2.0-85065927023 (Scopus ID)
Merknad

 Funding details: National Renewable Energy Laboratory; Funding details: Office of Energy Efficiency and Renewable Energy; Funding details: Energimyndigheten; Funding details: U.S. Department of Energy; Funding text 1: This work was authored in part by the National Renewable Energy Laboratory (NREL), operated by Alliance for Sustainable Energy, LLC, for the U.S. Department of Energy (DOE) under Contract No. DE-AC36-08GO28308. Funding was provided by U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Bioenergy Technologies Office and the Swedish Energy Agency . Scott Palmer, Calle Ylipää, Mathias Lundgren, Daniel Svensson and Jimmy Narvesjö are acknowledged for their contributions to the operation of the pyrolyzers, and Renee Happs and Steve Deutch for analytical work. The views expressed in the article do not necessarily represent the views of the DOE or the U.S. Government.

Tilgjengelig fra: 2019-06-03 Laget: 2019-06-03 Sist oppdatert: 2023-05-19bibliografisk kontrollert
Organisasjoner
Identifikatorer
ORCID-id: ORCID iD iconorcid.org/0000-0001-9126-0155
v. 2.41.0