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Coal Pyrolysis in a Laboratory‐Scale Two‐Stage Reactor: Catalytic Upgrading of Pyrolytic Vapors
Author(s) -
Gong Xiaomin,
Wang Ze,
Li Songgeng,
Song Wenli,
Lin Weigang
Publication year - 2014
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201300748
Subject(s) - pyrolytic carbon , catalysis , tar (computing) , pyrolysis , coal tar , chemistry , benzene , coal , nuclear chemistry , organic chemistry , chemical engineering , materials science , engineering , computer science , programming language
In situ upgrading of coal pyrolysis vapors over Ce/Zr/Ni and Ce/Zr/Ni/Zn catalysts was studied in a two‐stage reactor. The catalytic effects of Ce/Zr/Ni and Ce/Zr/Ni/Zn on the pyrolysis products were examined, revealing that CO 2 , CO, and H 2 were dramatically increased and pyrolytic water was decreased when using these catalysts. The tar collected in the cooling traps showed a slight increase after catalysis. Compared to the no‐catalyst condition, heterocyclic compounds and multicyclic aromatic hydrocarbons in the tar were significantly reduced, and benzene derivatives and aliphatics were increased. The molar ratio of H/C in tar was analyzed to further evaluate the tar quality. Possible reaction routes are proposed.