Deep hydroconversion of ethanol-soluble portion from the ethanolysis of Hecaogou subbituminous coal to ultra-clean liquid fuel over hierarchical porous zeolite Y supported Ni–Co nanoparticles

Autor: Hong-Cun Bai, Yu-Hong Kang, Zhi-Min Zong, Guang-Hui Liu, Jin-Jun Bai, Ma Xiangrong, Juan Gao, Cheng-Hu Xue, Li Yanjun, Xiao-Qi Zhang, Xian-Yong Wei, Gao Yong
Rok vydání: 2021
Předmět:
Zdroj: Journal of the Energy Institute. 99:88-96
ISSN: 1743-9671
DOI: 10.1016/j.joei.2021.08.006
Popis: A hierarchical porous zeolite Y (HPZY) supported Ni–Co catalyst was prepared by pyrolyzing nickel tetracarbonyl and using modified deposition-precipitation to highly disperse Ni–Co nanoparticles onto HPZY. Hecaogou subbituminous coal was effectively ethanolyzed to obtain ethanol-soluble portion (ESPE) in a high yield (21.2%). Sequentially, ESPE was subjected to the deep hydroconversion (DHC) over prepared Ni10%-Co3%/HPZY at 150 °C under 4 MPa of initial hydrogen pressure for 24 h in n-heptane to produce deeply hydroconverted ethanol-soluble portion (ESPDHC). All the group components in ESPE, including arenes (53.3%), oxygen-containing organic compounds (24.4%), and nitrogen-containing aromatics (2.3%) were completely converted to chain alkanes (CAs, 36.8%), cyclanes (39.2%), and hydroarenes (24.0%). In addition, the hydroisomerization of CAs and hydroreforming of aromatic rings (ARs) in ESPDHC are predominant over Ni10%-Co3%/HPZY with more accessibility of active sites under mild conditions. Ni10%-Co3%/HPZY with suitable acidity and highly dispersed Ni–Co nanoparticles can effectively activate H2 to H⋯H and further heterogeneously split H⋯H to H+ and H−. H⋯H and H+ transfer plays crucial roles in the DHC of ESPE. Correspondingly, the related mechanisms are evidenced by the DHC of 2,2′-oxydinaphthalene (ODN) over Ni–Co/HPZY. Ni10%-Co3%/HPZY maintains high activity for the DHC of ODN under mild conditions after 4 recycles.
Databáze: OpenAIRE
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