Highly active and stable cobalt catalysts with a tungsten carbide-activated carbon support for dry reforming of methane: effect of the different promoters

Liang, Zhoujie; Zhang, Guojie; Li, Jun; Wang, Ying; Zhao, Yuqing; Li, Guoqiang; Lv, Yongkang

doi:10.1039/d2cy00833e

Cited by 12 publications

(5 citation statements)

References 91 publications

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“…The trend of weight loss at higher temperatures indicates the presence of more difficult to dissipate carbon on the surface of the catalyst. The Y loading catalysts exhibited a narrower and lower weight loss temperature range, indicating that the carbon deposition on their surface is more easily dissipated [15,22] . Among them, the 20Co‐15Y/WC‐AC catalyst showed the lowest weight loss of about 27%, which was attributed to the introduction of Y loading that effectively gasified the loose carbon in the carbon material matrix and promoted the carbon elimination on the catalyst surface.…”

Section: Resultsmentioning

confidence: 99%

“…The Y loading catalysts exhibited a narrower and lower weight loss temperature range, indicating that the carbon deposition on their surface is more easily dissipated. [15,22] Among them, the 20Co-15Y/WC-AC catalyst showed the lowest weight loss of about 27%, which was attributed to the introduction of Y loading that effectively gasified the loose carbon in the carbon material matrix and promoted the carbon elimination on the catalyst surface. On the other hand, the 20Co-10Y/WC-AC catalyst showed the largest weight loss of about 38% and exhibited better catalytic activity and stability.…”

Section: Effect Of Y Loadingmentioning

confidence: 99%

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Effects of Promoter and Calcination Temperatures on the Catalytic Performance of Y Promoted Co/WC‐AC for Dry Reforming of Methane

Li,

Wang,

Zhang

et al. 2023

Chemistry An Asian Journal

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CH4‐CO2 reforming is a good way to convert two environmentally harmful greenhouse gases into a high value syngas. However, the catalytic activity and stability of the catalysts need to be further improved. In this paper, the effects of promoter Y and calcination temperature on the catalytic activity and stability of Co/WC‐AC catalysts were investigated. The catalysts were characterized by BET, XRD, CO2‐TPD, H2‐TPR, XPS, and TG‐DSC. XPS and H2‐TPR. The results indicated that the introduction of Y decreased the reduction temperature of Co2O3 species and facilitated the formation of Co2+ species. Meanwhile, the addition of Y increased the content of lattice oxygen on the catalyst surface, which enhanced the carbon elimination capacity of the catalyst. The TG‐DSC results showed that the activity and stability of the catalysts calcined at 550 °C were poor due to the presence of carbon materials with weak carbon interactions on the catalyst support surface. Meanwhile, the catalyst calcined at 700 °C lead to the collapse of the pores due to the high calcination temperature, which eventually led to the decrease of the catalyst stability. It was found that the Co‐Y/WC‐AC catalysts prepared at the calcination temperature of 600 °C had the best catalytic activity and stability.

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Section: Resultsmentioning

confidence: 99%

Section: Effect Of Y Loadingmentioning

confidence: 99%

Effects of Promoter and Calcination Temperatures on the Catalytic Performance of Y Promoted Co/WC‐AC for Dry Reforming of Methane

Li,

Wang,

Zhang

et al. 2023

Chemistry An Asian Journal

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“…The first problem was the metal loss during operation due to volatile carbonyl formation. The second problem was the low yield of long-chained hydrocarbons caused by methanation since nickel-based catalysts are highly active for such reactions [61,[80][81][82][83]. Table 4 compares the four metals and their four characteristics.…”

Section: Catalysts Of Ftsmentioning

confidence: 99%

Fisher–Tropsch Synthesis for Conversion of Methane into Liquid Hydrocarbons through Gas-to-Liquids (GTL) Process: A Review

Al-Sudani

Saeed²,

Ali

et al. 2023

Methane

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The interest in Gas-to-Liquid technology (GTL) is growing worldwide because it involves a two-step indirect conversion of natural gas to higher hydrocarbons ranging from Liquefied Petroleum Gas (LPG) to paraffin wax. GTL makes it possible to obtain clean diesel, naphtha, lubes, olefins, and other industrially important organics from natural gas. This article is a brief review discussing the state-of-the-art of GTL, including the basics of syngas manufacturing as a source for Fischer-Tropsch synthesis (FTS), hydrocarbons synthesis (Fischer-Tropsch process), and product upgrading. Each one is analyzed, and the main characteristics of traditional and catalysts technologies are presented. For syngas generation, steam methane reforming, partial oxidation, two-step reforming, and autothermal reforming of methane are discussed. For Fischer–Tropsch, we highlight the role of catalysis and selectivity to high molecular weight hydrocarbons. Also, new reactors technologies, such as microreactors, are presented. The GTL technology still faces several challenges; the biggest is obtaining the right H2:CO ratio when using a low steam-to-carbon ratio. Despite the great understanding of the carbon formation mechanism, little has been made in developing newer catalysts. Since 60–70% of a GTL plant cost is for syngas production, it needs more attention, particularly for developing the catalytic partial oxidation process (CPO), given that modern CPO processes using a ceramic membrane reactor reduce the plant’s capital cost. Improving the membrane’s mechanical, thermal, and chemical stability can commercialize the process. Catalytic challenges accompanying the FTS need attention to enhance the selectivity to produce high-octane gasoline, lower the production cost, develop new reactor systems, and enhance the selectivity to produce high molecular weight hydrocarbons. Catalytically, more attention should be given to the generation of a convenient catalyst layer and the coating process for a given configuration.

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“…On the one hand, the complex hydrides act as a source of hydrogen, and on the other hand, these complex hydrides provide highly selective catalytic species that facilitate the complete conversion of CO2 to CH4. A series of Co-based catalysts modified by transition metals (Y, Gd, and Mn) were synthesized by applying the impregnation method by Zhang et al (2022b). Except for the catalysts modified with Mn promoter, the catalysts modified with other promoters showed better catalytic performance than the 20Co/WC-AC catalyst.…”

Section: Metal-based Materialsmentioning

confidence: 99%

An Overview of Enabling Catalysts for Carbon Dioxide Conversion Aiming at the Two-carbon Target

Wang

2022

Aerosol Air Qual. Res.

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The conversion of carbon dioxide into valuable chemicals using suitable catalysts effectively mitigates the greenhouse effect. Efficient, selective, and economical conversion of CO2 into high-value products under mild conditions and in large-scale industrial applications remains a great challenge. Over the past decade, research on CO2 conversion catalysts has gradually increased. Several researchers have published reviews on CO2 conversion catalyst research, which are generally developed from the perspective of a particular catalyst material or the reactions that occur with CO2. To provide a more comprehensive overview of the recent progress of CO2 conversion catalyst research, this paper summarizes the research results of each type of catalyst by classifying them according to the materials used in CO2 conversion. The catalysts covered include ionic liquids, metal-organic frameworks, covalent organic frameworks, metal-based materials, porous organic polymers, nanocatalysts, metal-free green A C C E P T E D M A N U S C R I P Tcatalysts, and catalysts of other materials. In addition, this review presents the problems faced by carbon dioxide conversion catalysts and future research directions.

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Highly active and stable cobalt catalysts with a tungsten carbide-activated carbon support for dry reforming of methane: effect of the different promoters

Abstract: Greenhouse effect has become one of the serious issues in the human development. Greenhouse gases are mainly composed of methane and carbon dioxide. Methane dry reforming (DMR) is an excellent...

Cited by 12 publications

References 91 publications

Effects of Promoter and Calcination Temperatures on the Catalytic Performance of Y Promoted Co/WC‐AC for Dry Reforming of Methane

Effects of Promoter and Calcination Temperatures on the Catalytic Performance of Y Promoted Co/WC‐AC for Dry Reforming of Methane

Fisher–Tropsch Synthesis for Conversion of Methane into Liquid Hydrocarbons through Gas-to-Liquids (GTL) Process: A Review

An Overview of Enabling Catalysts for Carbon Dioxide Conversion Aiming at the Two-carbon Target

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