Effect of Potassium on the Performance of MoP-based Catalysts in Methyl Mercaptan Synthesis from High H2S-Containing Syngas

doi:10.11944/j.issn.1000-0518.2016.09.160021

Chinese Journal of Applied Chemistry ›› 2016, Vol. 33 ›› Issue (9): 1079-1084.DOI: 10.11944/j.issn.1000-0518.2016.09.160021

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Effect of Potassium on the Performance of MoP-based Catalysts in Methyl Mercaptan Synthesis from High H₂S-Containing Syngas

ZHOU Bukang^a,WANG Qi^a^b^c^*(),CHEN Yazhong^a,CUI Peng^a,SHEN Zebin^d,ZHANG Qinghong^d,WANG Ye^d

^aAnhui Key Laboratory of Controllable Chemical Reaction and Material Chemical Engineering,School of Chemistry and Chemical Engineering,Hefei University of Technology,Hefei 230009,China
^bMaterial Science and Engineering Post-Doctoral Research Station,Hefei University of Technology,Hefei 230009,China
^cPost-Doctoral Work Station,Anhui Liuguo Chemical Company Limited,Tongling,Anhui 244021,China
^d State Key Laboratory of Solid Surface Physical Chemistry,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen,Fujian 361005,China

Received:2016-01-13 Accepted:2016-05-04 Published:2016-08-23 Online:2016-08-23
Contact: WANG Qi
Supported by:
Supported by the National Natural Science Fundation of China(No.21106027), State key Laboratory of Solid Surface Physical Chemistry(No.201412)

Abstract

Abstract:

A series of K_xMoP/Al₂O₃(x is K/Mo molar ratio, 0≤x≤3) catalysts with different K/Mo molar ratios was prepared through co-impregnation and characterized using X-ray diffraction(XRD), temperature-programmed reduction(TPR) and laser Raman spectroscopy(LRS). The effects of different potassium content of the catalysts for the synthesis of methyl mercaptan from high H₂S-containing syngas were investigated. The results indicate that MoP/Al₂O₃ catalysts are formed by hydrogen reduction at 850 ℃ from phosphorus molybdenum oxide precursor. With a small amount of potassium, the catalysts show higher methane selectivity. Further increase of potassium content promotes the generation of activity molybdenum sulfur phase, showing good methyl mercaptan selectivity. Excessive potassium hinders the generation of methyl mercaptan. When K/Mo molar ratio is between 2 and 2.5, MoP-based catalysts shows good catalytic activity and selectivity.

Key words: potassium, molybdenum phosphide, high H₂S-containing syngas, methyl mercaptan synthesis

ZHOU Bukang, WANG Qi, CHEN Yazhong, CUI Peng, SHEN Zebin, ZHANG Qinghong, WANG Ye. Effect of Potassium on the Performance of MoP-based Catalysts in Methyl Mercaptan Synthesis from High H₂S-Containing Syngas[J]. Chinese Journal of Applied Chemistry, 2016, 33(9): 1079-1084.

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Effect of Potassium on the Performance of MoP-based Catalysts in Methyl Mercaptan Synthesis from High H₂S-Containing Syngas

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