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Catalytic Conversion of Methane at Low Temperatures: A Critical Review
Author(s) -
Chen Yipei,
Mu Xueliang,
Luo Xiang,
Shi Kaiqi,
Yang Gang,
Wu Tao
Publication year - 2020
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201900750
Subject(s) - oxidative coupling of methane , syngas , methane , catalysis , coke , methanol , selectivity , chemistry , partial oxidation , methane reformer , inorganic chemistry , steam reforming , chemical engineering , materials science , organic chemistry , hydrogen production , engineering
The current study reviews the recent development in the direct conversion of methane into syngas, methanol, light olefins, and aromatic compounds. For syngas production, nickel‐based catalysts are considered as a good choice. Methane conversion (84%) is achieved with nearly no coke formation when the 7% Ni‐1%Au/Al 2 O 3 catalyst is used in the steam reforming of methane (SRM), whereas for dry reforming of methane (DRM), a methane conversion of 17.9% and CO 2 conversion of 23.1% are found for 10%Ni/ZrO x MnO x /SiO 2 operated at 500 °C. The progress of direct conversion of methane to methanol is also summarized with an insight into its selectivity and/or conversion, which shows that in liquid‐phase heterogeneous systems, high selectivity (>80%) can be achieved at 50 °C, but the conversion is low. The latest development of non‐oxidative coupling of methane (NOCM) and oxidative coupling of methane (OCM) for the production of olefins is also reviewed. The Mn 2 O 3 –TiO 2 –Na 2 WO 4 /SiO 2 catalyst is reported to show the high C 2 yield (22%) and a high selectivity toward C 2 (62%) during the OCM at 650 °C. For NOCM, 98% selectivity of ethane can be achieved when a tantalum hydride catalyst supported on silica is used. In addition, the Mo‐based catalysts are the most suitable for the preparation of aromatic compounds from methane.