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2021, Volume 15, Issue 2

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Frontiers of Chemical Science and Engineering >> 2021, Volume 15, Issue 2 doi: 10.1007/s11705-020-1932-y

Conversion of phenol to cyclohexane in the aqueous phase over Ni/zeolite bi-functional catalysts

. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.. CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.. College of Chemistry, Dalian University of Technology, Dalian 116024, China.. State Key Laboratory of Catalytic Materials and Reaction Engineering, Research Institute of Petroleum Processing, SINOPEC, Beijing 100083, China

Received: 2020-04-09 Accepted: 2020-06-12 Available online: 2020-06-12
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Abstract

A series of Ni/HZSM-5 and Ni/HIM-5 bi-functional catalysts were synthesized and applied to the aqueous-phase hydrodeoxygenation (HDO) of phenol. The Ni dispersibility and particle sizes were shown to be directly related to the porosity and crystal sizes of the parent zeolites, which further influenced the catalytic performances. The large pores and small crystal sizes of the parent zeolites were beneficial for dispersing Ni and forming small Ni particles, and the corresponding Ni/zeolite catalyst exhibited a higher phenol conversion and selectivity towards hydrocarbons. Importantly, the Ni/HIM-5 bi-functional catalyst exhibited a high activity (98.3%) and high selectivity for hydrocarbons (98.8%) when heated at 220°C for 1 h and is thus a new potential catalyst for the HDO of phenolics to form hydrocarbons in the aqueous phase.

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