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Issue 1, 2017
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The effects of contact time and coking on the catalytic fast pyrolysis of cellulose

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Abstract

The effects of catalyst contact time (WHSV−1) and coking on catalytic fast pyrolysis of cellulose with ZSM-5 were studied in a bubbling fluidized bed reactor. Because coke interferes with catalyst activity, the effect of catalyst contact time was studied at coke loadings known not to deactivate the catalyst. CO and CH4 are favored at low catalyst contact times (<1000 s), oxygenated and unidentified species at medium catalyst contact times (1000 s–10 000 s), and aromatics and CO2 at high catalyst contact times (>10 000 s). At increased time on stream, the catalyst lost activity due to coking. The majority aromatic-producing activity was lost after site turnovers of 95 (cellulose monomers to Brønsted sites) corresponding to a weight turnover of 2.0 (feed weight to catalyst weight). Accumulated coke deactivates the catalyst by both filling the micropores and blocking the acid sites.

Graphical abstract: The effects of contact time and coking on the catalytic fast pyrolysis of cellulose

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Publication details

The article was received on 12 Aug 2016, accepted on 21 Nov 2016 and first published on 21 Nov 2016


Article type: Paper
DOI: 10.1039/C6GC02239A
Citation: Green Chem., 2017,19, 286-297
  • Open access: Creative Commons BY license
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    The effects of contact time and coking on the catalytic fast pyrolysis of cellulose

    H. Yang, R. Coolman, P. Karanjkar, H. Wang, P. Dornath, H. Chen, W. Fan, W. C. Conner, T. J. Mountziaris and G. Huber, Green Chem., 2017, 19, 286
    DOI: 10.1039/C6GC02239A

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