Kinetics of Aqueous-Phase Hydrogenation of Model Bio-oil Compounds over a Ru/C Catalyst
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- 作者：Anandkumar B. Jain ; Prakash D. Vaidya
- 刊名：Energy & Fuels
- 出版年：2015
- 出版时间：January 15, 2015
- 年：2015
- 卷：29
- 期：1
- 页码：361-368
- 全文大小：424K
- ISSN：1520-5029
文摘
Aqueous-phase processing (APP) shows a lot of potential for the effective utilization of bio-oil. Water extraction, low-temperature hydrogenation of the water-soluble portion of bio-oil, and reforming (to H2) or dehydration/hydrogenation (to C1鈥揅6 alkanes) are the three constituent steps of APP. In this work, two compounds representing the bio-oil aqueous fraction, viz., xylenol and maltol, were selected. Hydrogenation of these compounds in the aqueous phase was investigated in the 318鈥?48 K range in a slurry reactor using a Ru/C catalyst. Kinetic data for the reactions with xylenol and maltol were collected in the chemical control regime and modeled using Langmuir鈥揌inshelwood kinetics. The dependency of the initial reaction rates upon H2 partial pressure in the 0.69鈥?.07 MPa range was linear. The surface reaction between the chemisorbed reactants, viz., atomic hydrogen and substrate, was considered as rate-determining.