期刊
ACS CATALYSIS
卷 8, 期 4, 页码 2735-2740出版社
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.8b00156
关键词
shale and natural gas utilization; nonoxidative coupling of methane (NOCM); Pt-Bi bimetallic catalysts; high selectivity toward C-2 species; Bi promoter effect on C-2 species formation
资金
- Davidson School of Chemical Engineering
- National Science Foundation [EEC-1647722]
There is widespread interest in converting methane, primary component of natural gas and shale gas, into valuable chemicals. As an important direct methane transformation technique, despite extensive research conducted for decades, oxidative coupling of methane (OCM) remains industrially uneconomical owing to low selectivity toward valuable target products (C-2 species, ethane/ethylene). In the present work, we describe that ZSM-5 zeolite supported bimetallic Pt-Bi catalysts stably and selectively convert methane to C-2 species with high carbon selectivity (> 90%) at relatively moderate temperatures (600-700 degrees C). On the basis of experimental observations, it is proposed that the surface Pt in the catalysts functions as the active site for methane activation, while Bi addition as promoter plays an important role in C-2 species formation and catalyst stability.
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