Stabilization of Softwood-Derived Pyrolysis Oils for Continuous Bio-oil Hydroprocessing
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- 作者：Mariefel V. Olarte ; Alan H. Zacher ; Asanga B. Padmaperuma…
- 关键词：Fast pyrolysis oil ; Hydroprocessing ; Pretreatment ; Catalyst fouling
- 刊名：Topics in Catalysis
- 出版年：2016
- 出版时间：January 2016
- 年：2016
- 卷：59
- 期：1
- 页码：55-64
- 全文大小：945 KB
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Alan H. Zacher (1)
Asanga B. Padmaperuma (1)
Sarah D. Burton (1)
Heather M. Job (1)
Teresa L. Lemmon (1)
Marie S. Swita (1)
Leslie J. Rotness (1)
Gary N. Neuenschwander (1)
John G. Frye (1)
Douglas C. Elliott (1)
1. Pacific Northwest National Laboratory, 902 Battelle Blvd., Richland, WA, 99352, USA - 刊物主题：Catalysis; Physical Chemistry; Pharmacy; Industrial Chemistry/Chemical Engineering; Characterization and Evaluation of Materials;
- 出版者：Springer US
- ISSN：1572-9028
文摘
The use of fast pyrolysis oil as a potential renewable liquid transportation fuel alternative to crude oil depends on successful catalytic upgrading to produce a refinery-ready product with oxygen content and qualities (i.e., specific functional group or compound content) compatible with the product’s proposed refinery insertion point. Similar to crude oil hydrotreating, catalytic upgrading of bio-oil requires high temperature and pressure. However, processing thermally unstable pyrolysis oil is not straightforward. For years, a two-temperature, downflow trickle bed reactor using sulfided catalysts was the state-of-the art for continuous operation. However, pressure excursion due to plug formation still occurred, typically at the high-temperature transition zone, and led to a process shutdown within 140 h. A plug typically consists of polymerized bio-oil and inorganic constituents that bind catalysts at specific portions preventing liquid and gas flow through the bed, resulting to a potential pressure incursion. Recently, two factors were found to enable continuous operation by preventing reactor shutdown due to plug formation: (1) a bio-oil pretreatment process prior to the two-temperature reactor, and (2) a robust commercial catalyst for the high temperature zone reactor. Here, we report the use and characterization of bio-oil that was pre-treated at 413 K and 8.4 MPa under flowing H2 (500 L H2/L bio-oil, 0.5 L bio-oil/L catalyst bed) to enable the long-term (cumulative 1440-h) bio-oil hydroprocessing.