Hydrophobic zeolite modification for in situ peroxide formation in methane oxidation to methanol

Selective partial oxidation of methane to methanol suffers from low efficiency. Here, we report a heterogeneous catalyst system for enhanced methanol productivity in methane oxidation by in situ generated hydrogen peroxide at mild temperature (70°C). The catalyst was synthesized by fixation of AuPd...

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Podrobná bibliografie
Vydáno v:	Science (American Association for the Advancement of Science) Ročník 367; číslo 6474; s. 193
Hlavní autoři:	Jin, Zhu, Wang, Liang, Zuidema, Erik, Mondal, Kartick, Zhang, Ming, Zhang, Jian, Wang, Chengtao, Meng, Xiangju, Yang, Hengquan, Mesters, Carl, Xiao, Feng-Shou
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	United States 10.01.2020
ISSN:	1095-9203, 1095-9203
On-line přístup:	Zjistit podrobnosti o přístupu
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Popis
Shrnutí:	Selective partial oxidation of methane to methanol suffers from low efficiency. Here, we report a heterogeneous catalyst system for enhanced methanol productivity in methane oxidation by in situ generated hydrogen peroxide at mild temperature (70°C). The catalyst was synthesized by fixation of AuPd alloy nanoparticles within aluminosilicate zeolite crystals, followed by modification of the external surface of the zeolite with organosilanes. The silanes appear to allow diffusion of hydrogen, oxygen, and methane to the catalyst active sites, while confining the generated peroxide there to enhance its reaction probability. At 17.3% conversion of methane, methanol selectivity reached 92%, corresponding to methanol productivity up to 91.6 millimoles per gram of AuPd per hour.
Bibliografie:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1095-9203 1095-9203
DOI:	10.1126/science.aaw1108