Gasification of pure and mixed feedstock components: Effect on syngas composition and gasification efficiencyShow others and affiliations
2022 (English)In: Journal of Cleaner Production, ISSN 0959-6526, E-ISSN 1879-1786, Vol. 369, article id 133330Article in journal (Refereed) Published
Abstract [en]
The aim of this work was to investigate whether the use of individual tree components (i.e., stem wood, bark, branches, and needles of spruces) as feedstocks during oxygen blow gasification is more efficient than using mixtures of these components. Experiments were performed at three oxygen levels in an 18-kW oxygen blown fixed bed gasifier with both single and mixed component feedstocks. The composition of the resulting syngas and the cold gas efficiency based on CO and H2 (CGEfuel) were used as response variables to evaluate the influence of different feedstocks on gasification performance. Based on the experimental results and data on the composition of ∼26000 trees drawn from a national Swedish spruce database, multivariate models were developed to simulate gasifier performance under different operating conditions and with different feedstock compositions. The experimental results revealed that the optimal CGEfuel with respect to the oxygen supply differed markedly between the different spruce tree components. Additionally, the models showed that co-gasification of mixed components yielded a lower CGEfuel than separate gasification of pure components. Optimizing the oxygen supply for the average tree composition reduced the GCEfuel by 1.3–6.2% when compared to optimal gasification of single component feedstocks. Therefore, if single-component feedstocks are available, it may be preferable to gasify them separately because doing so provides a higher gasification efficiency than co-gasification of mixed components. © 2022 The Authors
Place, publisher, year, edition, pages
Elsevier Ltd , 2022. Vol. 369, article id 133330
Keywords [en]
Bark, Biomass components, Branches, Co-gasification, Cold gas efficiency, Needles, Wood, Efficiency, Forestry, Gasification, Synthesis gas, Trees (mathematics), Tumors, Branch, Gasification efficiency, Gasifiers, Performance, Single components, Tree components, Feedstocks
National Category
Bioprocess Technology
Identifiers
URN: urn:nbn:se:ri:diva-60051DOI: 10.1016/j.jclepro.2022.133330Scopus ID: 2-s2.0-85135831044OAI: oai:DiVA.org:ri-60051DiVA, id: diva2:1701084
Note
Funding text 1: We thank the Bio4Energy strategic research environment appointed by the Swedish government ( www.bio4energy.se ) for financial support. Gunnar Kalén and Markus Segerström are acknowledged for assistance in the preparation and pelleting of tree components. RISE ETC engineers and technicians are acknowledged for operating the gasification pilot plant.
2022-10-042022-10-042023-05-19Bibliographically approved