A review of catalyst modifications for a highly active and stable hydrogen production from methane

Promotional role of NiCu alloy in catalytic performance and carbon properties for CO2-free H2 production from thermocatalytic decomposition of methane

“…1,3 A major challenge for Ni-based catalysts is their fast deactivation especially above 600 °C. 2,4,11 However, the TCD reaction is thermodynamically favored at higher temperature. Therefore, to enable broader application of TCD, it is critical to identify a catalyst that is stable and active at relatively high operation temperature.…”

“…H 2 or carbon yield) than other transition metals such as Fe and Co, and produce carbon fibers or carbon nanotubes (500-700 °C) [1,3]. A major challenge for Ni-based catalysts is their fast deactivation especially above 600 °C [2,4,11]. However, the TCD reaction is thermodynamically favored at higher temperature.…”

Smart Designs of Zeolite-Based Catalysts for Dry Reforming of Methane: A Review

“…Syngas as a mixture of CO and H 2 has been efficiently utilized as a fuel or converted into other products. In particular, after a downstream processing (such as membrane separation or Fischer–Tropsch synthesis), pure H 2 and other value-added products could be formed. − The reactions to generate syngas mainly include reforming of natural gases and tars. − Among the various natural gas and tar molecules, CH 4 is featured with the high content of hydrogen, easy production, and large abundance, widely used as the raw feed in reforming reactions (Figure ), like steam reforming of methane (SRM), − dry reforming of methane (DRM), − and partial oxidation of methane (POM). − Therein, the SRM process is an industrially mature process and featured with a H 2 -rich syngas production; the downstream purification step can also be reduced due to the simultaneous Water–Gas Shift Reaction. − As the main products, the H 2 -abundant fuel stream suits the polymer electrolyte membrane fuel cells, which are more efficient than combustion engines. But it requires high energy to generate steam, and the catalyst suffers from sulfur poisoning .…”

“…Also, the O 2 supply is a costly process . In comparison, DRM benefits from the utilization of two greenhouse gases (i.e., CH 4 and CO 2 ), and the H 2 /CO ratio of one favors the Fischer–Tropsch synthesis to produce a series of value-added chemicals (e.g., methanol, dimethyl ether, oxyalcohol, acetic acid, and long-chain hydrocarbons). − The bottleneck of DRM industrialization is the catalyst deactivation under harsh reaction conditions, mainly caused by coke formation, active site sintering, and catalyst poisoning. ,− …”

Recent Advances in the Use of Controlled Nanocatalysts in Methane Conversion Reactions

“…However, its inert C-H bonds pose a significant challenge for activation and conversion under mild conditions. Traditional catalysts often suffer from low activity, poor selectivity, and rapid deactivation, hindering the development of efficient methane conversion processes [4,5]. The emergence of controlled nanocatalysts has opened new avenues for addressing these challenges, offering unprecedented control over catalyst structure, composition, and surface properties, as depicted in Figure 1.…”