In situ generation of nickel/carbon catalysts by partial gasification of coal char and application for methane decomposition

Zhang, Jianbo; Xie, Wenting; Li, Xing; Hao, Qingqing; Chen, Huiyong; Ma, Xiaoxun

doi:10.1016/j.ijhydene.2018.12.005

Cited by 22 publications

(2 citation statements)

References 54 publications

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“…Lots of studies are devoted to the production of hydrogen. Catalytic systems based on wastes (by-products, semi-products) of the coal industry look advantageous from the point of view of the creation of low-waste technologies [69][70][71]. For instance, a strategy has been proposed for preparing Ni/C catalysts for methane decomposition by adding nickel oxide and K 2 CO 3 during the steam gasification of coal char (Fig.…”

Section: Methane Decompositionmentioning

confidence: 99%

Hydrogen Production from Coal Industry Methane

Матус

Исмагилов

Mikhaylova

et al. 2022

Eurasian Chem. Tech. J.

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Coal industry methane is a fossil raw material that can serve as an energy carrier for the production of heat and electricity, as well as a raw material for obtaining valuable products for the chemical industry. To ensure the safety of coal mining, rational environmental management and curbing global warming, it is important to develop and improve methods for capturing and utilizing methane from the coal industry. This review looks at the scientific basis and promising technologies for hydrogen production from coal industry methane and coal production. Technologies for catalytic conversion of all types of coal industry methane (Ventilation Air Methane – VAM, Coal Mine Methane – CMM, Abandoned Mine Methane – AMM, Coal-Bed Methane – CBM), differing in methane concentration and methane-to-air ratio, are discussed. The results of studies on the creation of a number of efficient catalysts for hydrogen production are presented. The great potential of hybrid methods of processing natural coal and coal industry methane has been demonstrated.

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Section: Methane Decompositionmentioning

confidence: 99%

Hydrogen Production from Coal Industry Methane

Матус

Исмагилов

Mikhaylova

et al. 2022

Eurasian Chem. Tech. J.

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“…All the bimetallic catalysts were observed to have higher activity and stability, as seen in the activity figure; owing to that, the addition of Ni promoted the formation of filamentous-graphitic carbon whose growth does not hinder access to the active metal sites. Zhang et al reported in their study that the formation and growth of filamentous carbons during catalytic methane decomposition was beneficial in keeping the active Ni sites accessible for CH 4 molecules and, consequently, made it possible for the catalysts to maintain their activity and stability for a longer time (Zhanga et al, 2019).…”

Section: Temperature-programmed Oxidationmentioning

confidence: 99%

Methane Decomposition Over ZrO2-Supported Fe and Fe–Ni Catalysts—Effects of Doping La2O3 and WO3

et al. 2020

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A leading method for hydrogen production that is free of carbon oxides is catalytic methane decomposition. In this research, Fe and Fe-Ni supported catalysts prepared by the wet impregnation method were used in methane decomposition. The effects of doping the parent support (ZrO 2) with La 2 O 3 and WO 3 were studied. It was discovered that the support doped with La 2 O 3 gave the best performance in terms of CH 4 conversion, H 2 yield, and stability at the test condition, 800 • C and 4,000-ml h −1 g −1 cat. space velocity. The addition of Ni significantly improved the performance of all the monometallic catalysts. The catalysts were characterized by X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), temperature-programmed reduction/oxidation (TPR/TPO), thermogravimetric analyzer (TGA), and microscopy (SEM and Raman) techniques. Phases of the different forms of Fe were identified by XRD. BET showed a drastic decline in the specific surface area of the catalysts with respect to the supports. TPR profiles revealed a progressive change in the valency of Fe in its combined form to the zero valence-free metal. The La 2 O 3-promoted support gave the best performance and maintained good stability during the time on stream.

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