Use of CO 2 in Pressurized, Fluidized Bed Gasification of Waste Biomasses

Mateusz Szul, Tomasz Iluk and Jarosław Zuwała
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Mateusz Szul: Institute for Chemical Processing of Coal (IChPW), 41-803 Zabrze, Poland
Tomasz Iluk: Institute for Chemical Processing of Coal (IChPW), 41-803 Zabrze, Poland
Jarosław Zuwała: Institute for Chemical Processing of Coal (IChPW), 41-803 Zabrze, Poland

Energies, 2022, vol. 15, issue 4, 1-20

Abstract: This research discusses the results of experiments performed on a large-scale gasification installation to determine the influence of total system pressure and partial pressure of CO 2 on the efficiency of conversion and the quality of the produced gas. The three tested feedstocks were bark, lignin and a blend of bark and wheat straw, while softwood pellet (SWP) was used as a reference fuel. A mixture of O 2 /CO 2 /H 2 O was used as a gasification agent. The tests were devised to validate the previously proposed process parameters, verify whether similar ash agglomeration problems would occur and compare the thermal behaviour of the feedstocks converted in close-to-industrial process conditions. An understanding of the effect of using CO 2 for gasification was further deepened, especially regarding its influence on the yield of H 2 and temperature profiles of the fluidized bed. The influence of gasification pressure was predominantly visible in higher yields of all hydrocarbons (including CH 4 ) and lower overall production of producer gas. At the process development unit (PDU), all tested feedstocks were converted at similar process conditions and no signs of potential bed agglomeration could be noticed. This opposes the findings observed in smaller-scale bubbling fluidized bed (BFB) tests. The discussion behind these discrepancies is also presented.

Keywords: gasification; CFB; CO 2; BtX; pressure gasification; biogenic residues (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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