Kinetics of Upgrading of Anisole with Hydrogen Catalyzed by Platinum Supported on Alumina
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- 作者：Majid Saidi ; Parisa Rostami ; Hamid Reza Rahimpour ; Mohammad Ali Roshanfekr Fallah ; Mohammad Reza Rahimpour ; Bruce C. Gates ; Sona Raeissi
- 刊名：Energy & Fuels
- 出版年：2015
- 出版时间：August 20, 2015
- 年：2015
- 卷：29
- 期：8
- 页码：4990-4997
- 全文大小：516K
- ISSN：1520-5029
文摘
Kinetics of the reactions of anisole, a model compound representative of lignin-derived bio-oils, with H2, catalyzed by Pt/Al2O3, were investigated with a fixed-bed tubular microflow reactor at 573鈥?73 K, 8鈥?4 bar, and space velocities in the range of 3鈥?40 (g of anisole)/(g of catalyst 脳 h). Selectivity鈥揷onversion data were used as a basis to propose an approximate reaction network and estimate parameters in approximate rate equations. The reactions include the following: anisole conversion to phenol by hydrogenolysis, to 2-methylphenol by transalkylation, to 2,4-dimethylphenol, 2,4,6-trimethylphenol, and 2,3,5,6-tetramethylphenol by transalkylation and alkylation, to benzene by hydrodeoxygenation (HDO), and to hexamethylbenzene by HDO and alkylation. The primary reactions are satisfactorily represented with the approximation that each is first-order in the organic reactant. The apparent activation energy for the hydrogenolysis reaction that leads to phenol formation is approximately 25.3 kJ/mol, and the alkylation is the reaction class characterized by the highest apparent activation energy.