In-situ pyrolysis of tar-rich coal synergistically regulated by pressurized steam and Ca-Fe catalyst: Tar upgrading and product evolution mechanisms

2026-07-22

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Chuchu Wang

Yuliang Ma

刘淑琴 (Shuqin Liu) *

Zhibing Chang *

Qingqing Deng

Houqiang Xu

Yuchao Wang

DOI：10.1016/j.jaap.2026.107995

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• Aqueous solution impregnation simulates in-situ pyrolysis catalyst loading. • Optimal tar yield 5.75% (62.9% relative increase) over same conditions without steam. • Mono-/bicyclic aromatics rise to 73.09%; phenol and alkylphenols account for 87.21%. • Bimetallic sites like Ca2Fe2O5 form, enhancing C-O and C-C bond cleavage.

In-situ pyrolysis of tar-rich coal synergistically regulated by pressurized steam and Ca-Fe catalyst: Tar upgrading and product evolution mechanisms

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