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Extractive Sampling of Gas and Particulates from the Reactor Core of an Entrained Flow Biomass Gasifier
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energy Technology Center.
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energy Technology Center.
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energy Technology Center.
2016 (English)In: Energy & Fuels, ISSN 0887-0624, E-ISSN 1520-5029, Vol. 30, no 8, 6405-6412 p.Article in journal (Refereed) Published
Abstract [en]

With the purpose of demonstrating a process for pressurized entrained flow gasification for pulverized biomass, the aim with this work was to characterize the conditions inside the gasifier. To gain a broader understanding, it was important to extract both gases and particulate matter from the hot reaction zone. The objectives were, therefore, to (1) develop a sampling system capable of extracting both gas and particulates from the gasifier, (2) study the production of particulate matter as well as its composition and size distribution as a function of different operating conditions, and (3) extract time-resolved data for the syngas species (CO, CO2, and CH4) in order to study the compositional variance. The results indicated that the syngas heating value was lower at the sampling position in the gasifier compared to the heating value measured downstream of the quench cooler. The difference was most probably an effect of ongoing gasification of carboneous solids downstream of the sampling position in the gasifier. Furthermore, it was concluded that the fuel feedrate was fluctuating, most likely because of heterogeneity in the fuel powder and/or the challenges in the fuel feeding system itself. With regards to particulate matter in the syngas, it was shown to mostly consist of soot. The soot yield was significantly reduced by increasing γ. The reactor core sampling system proved superior to the traditional sampling system downstream of the quench with regard to measuring soot yield at different operating conditions of the gasifier. Finally, it was concluded that the submicron fly ash particles from oxygen blown biomass gasification contain high propotions of refractory elements (e.g., Ca, Mg, and Si) in addition to the more volatile elements (e.g., K, Na, S, and Cl). This is probably due to extremely high temperature in the flame and substoichiometric condition in the gasifier, which may promote vaporization of refractory elements during char gasification. © 2016 American Chemical Society.

Place, publisher, year, edition, pages
2016. Vol. 30, no 8, 6405-6412 p.
Keyword [en]
Biomass, Carbon dioxide, Fly ash, Fuels, Magnesium, Reactor cores, Refractory materials, Soot, Synthesis gas, Biomass Gasification, Different operating conditions, Fuel feeding system, Particulate Matter, Pressurized entrained flow gasification, Refractory elements, Sampling positions, Time-resolved data, Gasification
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-27622DOI: 10.1021/acs.energyfuels.6b00434Scopus ID: 2-s2.0-84983657248OAI: oai:DiVA.org:ri-27622DiVA: diva2:1059668
Note

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