Ex-situ catalytic fast pyrolysis of low-rank coal over HZSM-5 and modified Mg/HZSM-5 catalysts

Muhammad Nadeem Amin, Ashfaq Ahmed, Yi Li, Chunshan Li, Suojiang Zhang, Muhammad Ammar, Young Kwon Park

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


Catalytic effects in fast pyrolysis of low-rank coal and coal tar conversion were investigated in a two-stage fixed-bed reactor over HZSM-5 zeolite and Mg/HZSM-5. Mg/HZSM-5 caused the lower total tar yield and the higher non-condensable gas yield but the fraction of light tar (boiling point below 360°C) increased to allow a slightly higher total yield of light tar. It also exhibited good catalytic activity and increased the species of light tar than HZSM-5 zeolite. The light tar fraction was increased from 45 to 74.6 wt% than without catalyst (66%) at the pyrolysis temperature of 600°C. Ex-situ catalytic fast pyrolysis over Mg/HZSM-5 also lowered the contents of element N and S in the resulting coal tars by 29% and 15% respectively. The corresponding increase in the content of element H and molar ratio of H to C of the resulting coal tars was reported as 17% and 13% respectively. The addition of Mg into HZSM-5 increased the ability of the catalyst for inhibiting coke deposition.

Original languageEnglish
Pages (from-to)891-899
Number of pages9
JournalInternational Journal of Energy Research
Issue number2
StatePublished - Feb 2022


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