Methane decomposition into CO _x ‐free hydrogen over a Ni‐based catalyst: An overview

Abstract

Summary Hydrogen is a clean energy medium that can potentially replace fossil fuels in home, industrial, and transportation environments. Nonoxidative catalytic methane decomposition (CMD) is an environmentally friendly process that produces hydrogen and solid carbon as products. Among transition metal catalysts, Ni possesses a high degree of activity for methane decomposition. This article reviews the recent advancement (ie, 2015‐2020) of a Ni‐based catalyst for CMD and summarizes its performance. It addresses the effect of promoter, metal composition, support materials selection, catalyst synthesis, operating parameters, and reaction mechanism. Besides, other critical aspects for industrial application of CMD such as reactor design and catalyst regeneration are highlighted. Novelty Statement Catalytic methane decomposition is a promising technology for the co‐production of COx‐free hydrogen and carbon nanomaterials. The Ni‐based catalyst possesses a high degree of activity for catalytic methane decomposition. Regeneration by gasification should be considered to extend the operational life of the Ni‐based catalyst. A fluidized bed reactor is a suitable reactor type for the practical application of catalytic methane decomposition.

Size-dependent catalytic hydrogen productionviamethane decomposition and aromatization at a low-temperature using Co, Ni, Cu, Mo, and Ru nanometals

“…To the best of our knowledge, this hydrogen production from 650 K has not been observed previously, since methane decomposition based on Ni-based catalysts required at least 773 K in a previous study. 35 Chan et al reported methane decomposition to hydrogen on a Ni-SiO 2 (BPS-5) catalyst at 773 K. 36 The Ni nanocatalyst on porous SiO 2 exhibited a superior performance that was similar to that in a previous study, which was caused by the size effect of the nanocatalysts and the overoxidation state on the surface (Fig. 2b).…”

Sonochemically Prepared Ni-Based Perovskites as Active and Stable Catalysts for Production of COx-Free Hydrogen and Structured Carbon

“…To determine whether the sonochemical synthesis method produces LaNiO 3 with enhanced catalytic activity in CMD compared to conventionally prepared LaNiO 3 by the Pechini sol–gel method, all samples from Table were tested in reaction under isothermal conditions at 700 °C. It is known that catalysts active in CMD usually operate optimally within the 500–700 °C temperature range, ,− and specifically for the reference LaNiO 3 prepared by the Pechini method, it has been determined that the optimum reaction temperature is 700 °C . Therefore, we chose this temperature to contrast the activity of all of the catalysts in the isothermal reaction experiments.…”

Simultaneous and Continuous Production of Carbon Nanotubes and Hydrogen by Catalytic CH4 Decomposition in a Pressurized Fluidized-Bed Reactor

“…As such, turquoise hydrogen technology can be classified as a low-carbon hydrogen production method, even though it utilizes fossil fuels, such as natural gas. Depending on the process design, turquoise hydrogen production can achieve greenhouse gas emissions per unit of hydrogen production at the level of current blue hydrogen production technology or even lower. − …”