期刊
CATALYSIS LETTERS
卷 149, 期 1, 页码 248-258出版社
SPRINGER
DOI: 10.1007/s10562-018-2590-2
关键词
Benzene alkylation; OX; EB and TMB suppression; Ru; HZSM-5; Catalyst stability; Thermodynamics analysis
资金
- Science and Technology Support Project of Gansu Province [1604GKCD026]
- National Nature Science Foundation of China [212006065, 21666018]
The process of benzene/methanol alkylation reaction was studied thermodynamically based on functional group contribution method of Benson. Results show that ortho-xylene (OX), Ethyl-benzene (EB) and tri-methylbenzene (TMB) are the main byproduct in alkylation of benzene by methanol and the suppression of OX, EB and TMB over hierarchical porous HZSM-5 or other types of acidic solid catalysts still remains a great challenge. To overcome these limitations, we modified hierarchical ZSM-5 with ruthenium (Ru) to evaluate the alkylation of benzene with methanol in a fixed-bed continuous flow reactor. It was found that the presence of a small amount of Ru in ZSM-5 catalyst would largely suppress the formation of EB, reduce the selectivity of OX and TMB, and also extend greatly the live time of the catalyst. Alkylation of benzene by methanol: thermodynamics analysis for designing and designing for enhancing the selectivity of toluene and para-xylene. [GRAPHICS] .
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