Iron salt catalytic pyrolysis of biomass: Influence of iron salt type

Sunwen Xia, Haiping Yang, Shuaishuai Lei, Wang Lu, Ning Cai, Haoyu Xiao, Yingquan Chen and Hanping Chen

Energy, 2023, vol. 262, issue PA

Abstract: To improve on existing pyrolytic products and understand the role played by the anion during catalytic pyrolysis with iron salts, different iron salt types were studied for biomass pyrolysis. The results demonstrate that iron salts promoted the cracking of biomass, decreased the precipitation temperature of the volatiles, and increased the production of char and hydrogen. Specifically, the addition of Fe(NO3)3 increased the gas yield and promoted the degree of graphitization and meso-porosity of biochar. The use of FeCl2 and FeCl3 led to a high selectivity (85.74%) for the production of ketone-rich oil, a highly developed micropore-dominated biochar with a surface area of 505 m2/g, and a hydrogen-rich gas (33.68 vol %). When Fe2(SO4)3 was used, acid-dominated oil with 73.85% selectivity was obtained. The pyrolysis behavior and properties of the product depended on the degree of hydrolysis during impregnation and the in-situ-produced iron microcrystalline structure (nitride, oxide, or carbide).

Keywords: Biomass pyrolysis; Catalytic graphitization; Ketones; H2 production; Iron salts (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:262:y:2023:i:pa:s0360544222022976

DOI: 10.1016/j.energy.2022.125415

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