Hydrogen is an important raw material in chemical industries, and the steam reforming of light hydrocarbons (such as methane) is the most used process for its production. In this process, the use of a catalyst is mandatory and, if compared to precious metal-based catalysts, Ni-based catalysts assure an acceptable high activity and a lower cost. The aim of a distributed hydrogen production, for example, through an on-site type hydrogen station, is only reachable if a novel reforming system is developed, with some unique properties that are not present in the large-scale reforming system. These properties include, among the others, (i) daily startup and shutdown (DSS) operation ability, (ii) rapid response to load fluctuation, (iii) compactness of device, and (iv) excellent thermal exchange. In this sense, the catalyst has an important role. There is vast amount of information in the literature regarding the performance of catalysts in methane steam reforming. In this short review, an overview on the most recent advances in Ni based catalysts for methane steam reforming is given, also regarding the use of innovative structured catalysts.

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A Short Review on Ni Based Catalysts and Related Engineering Issues for Methane Steam Reforming

A review on reactivity characteristics and synergy behavior of biomass and coal Co-gasification

Investigation on the thermal behavior characteristics and products composition of four pulverized coals: Its potential applications in coal cleaning

Effect of hydrothermal carbonization temperature on reactivity and synergy of co-gasification of biomass hydrochar and coal

The characteristics of gas–liquid–solid products during corn straw–H2O gasification were studied by the one-stage fluidized-bed/fixed-bed quartz reactor. The results indicate that the transformation between gas and solid products is mainly presented with the increase of feeding time (0–40 min). The aromaticity of biochar decreases slightly in the feeding period of 10–20 min but gradually increases in 20–40 min. The oxygen-containing functional groups in biochar increase gradually with the increase of the feeding time. The K content in biochar increases by 27% in 10–30 min, while that of Ca increases by 36% in 10–20 min. When the carbon conversion rate is less than 8%, the reactivity of biochar produced by 30 min of feeding is highest. The contents of phenol and 2,3-dihydrobenzofuran of tar increase by 25 and 34%, respectively in 20–40 min. The char–tar–H2O interaction in biomass gasification is a two-stage reaction. The first stage is dominated by the volatile–char interactions, while the second stage is ...

Characteristics of Gas–Liquid–Solid Products in Corn Straw Gasification: Effect of the Char–Tar–H2O Interaction

The intrinsic kinetics of methane steam reforming over a nickel-based catalyst in a micro fluidized bed reaction system

Kinetic characteristics of in-situ char-steam gasification following pyrolysis of a demineralized coal

To investigate pyrolysis characteristics of Shenhua bituminous coal under pressurized conditions, the effects of pressure (0-1.2 MPa) on the physicochemical structure and combustion reactivity of pyrolysis char samples prepared at 1073 and 1273 K were studied in a pressurized drop tube furnace (PDTF). The low temperature nitrogen adsorption test was used to characterize the physical structure of char samples. The results showed that, the increase of pyrolysis pressure is conducive to formation of mesopores, and the specific surface area is larger at 1273K. Raman and XPS analysis were used to characterize the chemical structure of char samples. The results showed that, the increase of pressure can promote the transformation of smaller aromatic structure into larger aromatic structure, and the graphitization degree are more obvious at 1273K. With the increase of pressure, the proportion of C=C/C-C bond in char structure increases and the proportion of C-H bond decreases. It indicates that the unst...

Effects of Pressure on the Characteristics of Bituminous Coal Pyrolysis Char Formed in a Pressurized Drop Tube Furnace

Effects of total pressure and CO2 partial pressure on the physicochemical properties and reactivity of pressurized coal char produced at rapid heating rate

Wenda Zhang

Papers

The intrinsic kinetics of methane steam reforming over a nickel-based catalyst in a micro fluidized bed reaction system

Kinetic characteristics of in-situ char-steam gasification following pyrolysis of a demineralized coal

Effects of Pressure on the Characteristics of Bituminous Coal Pyrolysis Char Formed in a Pressurized Drop Tube Furnace

Effects of total pressure and CO2 partial pressure on the physicochemical properties and reactivity of pressurized coal char produced at rapid heating rate

The evolution characteristics of bituminous coal in the process of pyrolysis at elevated pressure