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Evaluation of Engineered Biochar-Based Catalysts for Syngas Production in a Biomass Pyrolysis and Catalytic Reforming Process
KTH Royal Institute of Technology, Sweden.
KTH Royal Institute of Technology, Sweden.
KTH Royal Institute of Technology, Sweden.
Institute of Chemical Industry of Forest Products, China.
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2023 (English)In: Energy & Fuels, ISSN 0887-0624, E-ISSN 1520-5029, Vol. 37, p. 5942-Article in journal (Refereed) Epub ahead of print
Abstract [en]

Biochar, originating from biomass pyrolysis, has been proven a promising catalyst for tar cracking/reforming with great coke resistance. This work aims to evaluate various engineered biochar-based catalysts on syngas production in a biomass pyrolysis and catalytic reforming process without feeding extra steam. The tested engineered biochar catalysts include physical- and chemical-activated, nitrogen-doped, and nickel-doped biochars. The results illustrated that the syngas yields were comparable when using biochar and activated biochar as catalysts. A relatively high specific surface area (SSA) and a hierarchical porous structure are beneficial for syngas and hydrogen production. A 2 h physical-activated biochar catalyst induced the syngas with the highest H2/CO ratio (1.5). The use of N-doped biochar decreased the syngas yield sharply due to the collapse of the pore structure but obtained syngas with the highest LHVgas (18.5MJ/Nm3). The use of Ni-doped biochar facilitated high syngas and hydrogen yields (78.2 wt % and 26 mmol H2/g-biomass) and improved gas energy conversion efficiency (73%). Its stability and durability test showed a slight decrease in performance after a three-time repetitive use. A future experiment with a longer time is suggested to determine when the catalyst will finally deactivate and how to reduce the catalyst deterioration. © 2023 The Authors. 

Place, publisher, year, edition, pages
American Chemical Society , 2023. Vol. 37, p. 5942-
Keywords [en]
Biomass, Catalysts, Catalytic reforming, Deterioration, Doping (additives), Durability, Energy conversion efficiency, Hydrogen production, Pore structure, Steam reforming, Activated nitrogen, Biochar, Biomass pyrolysis, Coke resistances, Engineered biochar, Reforming process, Syn gas, Syngas production, Tar cracking, ]+ catalyst, Synthesis gas
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:ri:diva-64341DOI: 10.1021/acs.energyfuels.3c00410Scopus ID: 2-s2.0-85151322199OAI: oai:DiVA.org:ri-64341DiVA, id: diva2:1755156
Note

Funding details: 51418-1; Funding details: China Scholarship Council, CSC; Funding text 1: The authors gratefully acknowledge the financial support by the Swedish Energy Agency─Energimyndigheten with project number 51418-1. One of the authors, Hanmin Yang, would like to acknowledge the financial support from the Chinese Scholarship Council (CSC) and Stiftelsen Energitekniskt Centrum i Piteå, Sweden.

Available from: 2023-05-05 Created: 2023-05-05 Last updated: 2024-05-27Bibliographically approved

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Sandström, Linda

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