Methanation over Ni/SiO2: Effect of the catalyst preparation methodologies

Yan, Xiaoliang; Liu, Yuan; Zhao, Binran; Wang, Zhao; Wang, Yong; Liu, Changjun

doi:10.1016/j.ijhydene.2012.12.024

Cited by 182 publications

(125 citation statements)

References 36 publications

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“…Recently, many studies have focused on the RDR reaction with the H 2 /CO ratio of one. Yan et al (2013) found that the catalyst preparation methodologies significantly affected the activity and stability of Ni/SiO 2 catalysts. Jiang et al (2013Jiang et al ( , 2014 investigated the stepwise sulfidation and sulfidation temperature on the catalytic activity of MoO 3 /CeO 2 -Al 2 O 3 .…”

Section: List Of Symbolsmentioning

confidence: 99%

CO hydrogenation combined with water-gas-shift reaction for synthetic natural gas production: a thermodynamic and experimental study

Meng

et al. 2017

Int J Coal Sci Technol

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The hydrogenation of CO to synthetic natural gas (SNG) needs a high molar ratio of H 2 /CO (usually large than 3.0 in industry), which consumes a large abundant of hydrogen. The reverse dry reforming reaction (RDR, 2H 2 ? 2CO $ CH 4 ? CO 2 ), combining CO methanation with water-gas-shift reaction, can significantly decrease the H 2 /CO molar ratio to 1 for SNG production. A detailed thermodynamic analysis of RDR reaction was carried out based on the Gibbs free energy minimization method. The effect of temperature, pressure, H 2 /CO ratio and the addition of H 2 O, CH 4 , CO 2 , O 2 and C 2 H 4 into the feed gas on CO conversion, CH 4 and CO 2 selectivity, as well as CH 4 and carbon yield, are discussed. Experimental results obtained on homemade impregnated Ni/Al 2 O 3 catalyst are compared with the calculations. The results demonstrate that low temperature (200-500°C), high pressure (1-5 MPa) and high H 2 /CO ratio (at least 1) promote CO conversion and CH 4 selectivity and decrease carbon yield. Steam and CO 2 in the feed gas decrease the CH 4 selectivity and carbon yield, and enhance the CO 2 content. Extra CH 4 elevates the CH 4 content in the products, but leads to more carbon formation at high temperatures. O 2 significantly decreases the CH 4 selectivity and C 2 H 4 results in the generation of carbon.Keywords Synthetic natural gas Á Reverse dry reforming of methane Á Gibbs free energy minimization Á Experimental study Á CO conversion List of symbols A k Total mass of k element in the feed f i H Standard-state fugacity of species i (Pa) f i

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Section: List Of Symbolsmentioning

confidence: 99%

CO hydrogenation combined with water-gas-shift reaction for synthetic natural gas production: a thermodynamic and experimental study

Meng

et al. 2017

Int J Coal Sci Technol

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“…For example, synthesis of methane (CH 4 ) from syngas (CO ? H 2 ) has been applied for the removal of unwanted CO for ammonia production, fuel cells, and others, as well as the production of natural gas derives [70]. Yan et al [70] prepared Ni/SiO 2 catalysts for CO methanation by dielectric-barrier discharge (DBD) plasma decomposition, and the resultant catalyst exhibited significantly improved activity with enhanced stability due to its smaller particle size with higher dispersion, less defects, and enhanced metal-support (NiSiO 2 ) interactions.…”

Section: Othersmentioning

confidence: 99%

“…H 2 ) has been applied for the removal of unwanted CO for ammonia production, fuel cells, and others, as well as the production of natural gas derives [70]. Yan et al [70] prepared Ni/SiO 2 catalysts for CO methanation by dielectric-barrier discharge (DBD) plasma decomposition, and the resultant catalyst exhibited significantly improved activity with enhanced stability due to its smaller particle size with higher dispersion, less defects, and enhanced metal-support (NiSiO 2 ) interactions. Gong et al [71] developed the simultaneous saccharification and enhanced lipid production (SSELP) process for efficient conversion of lignocellulosic materials into microbial lipids with higher lipid coefficient than those obtained by using the conventional process.…”

Section: Othersmentioning

confidence: 99%

Effects of nanostructure on clean energy: big solutions gained from small features

Xiong

Han

et al. 2015

Science Bulletin

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The increasing energy consumption and environmental concerns have driven the development of costeffective, high-efficiency clean energy. Advanced functional nanomaterials and relevant nanotechnologies are playing a crucial role and showing promise in resolving some energy issues. In this view, we focus on recent advances of functional nanomaterials in clean energy applications, including solar energy conversion, water splitting, photodegradation, electrochemical energy conversion and storage, and thermoelectric conversion, which have attracted considerable interests in the regime of clean energy. Abstract The increasing energy consumption and environmental concerns have driven the development of costeffective, high-efficiency clean energy. Advanced functional nanomaterials and relevant nanotechnologies are playing a crucial role and showing promise in resolving some energy issues. In this view, we focus on recent advances of functional nanomaterials in clean energy applications, including solar energy conversion, water splitting, photodegradation, electrochemical energy conversion and storage, and thermoelectric conversion, which have attracted considerable interests in the regime of clean energy.

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“…Noble metals, such as Pd, Rh, and Ru, exhibit high chemical stability and excellent activity for syngas methanation at low temperatures [11][12][13]. However, the limited reserves and high prices of noble metals greatly limit their industrial applications.…”

Section: Introductionmentioning

confidence: 99%

Core-Shell Structured Ni@SiO2 Catalysts Exhibiting Excellent Catalytic Performance for Syngas Methanation Reactions

Yang

Wen

2017

Catalysts

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Abstract:In this study, we prepared core-shell structured Ni@SiO 2 catalysts using chemical precipitation and modified Stöber methods. The obtained Ni@SiO 2 samples exhibited excellent catalysis performances, including high CO conversion of 99.0% and CH 4 yield of 89.8%. Moreover, Ni@SiO 2 exhibited excellent catalytic stability during a 100 h lifetime test, which was superior to that of the Ni/SiO 2 catalyst. The prepared samples were characterized using a series of techniques, and the results indicated that the catalytic performance for syngas methanation reaction of the Ni@SiO 2 sample was markedly improved owing to its nanoreactor structure. The strong interaction between the Ni core and the SiO 2 shell effectively restrained the growth of particles, and the deposition of C species.

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Methanation over Ni/SiO2: Effect of the catalyst preparation methodologies

Cited by 182 publications

References 36 publications

CO hydrogenation combined with water-gas-shift reaction for synthetic natural gas production: a thermodynamic and experimental study

CO hydrogenation combined with water-gas-shift reaction for synthetic natural gas production: a thermodynamic and experimental study

Effects of nanostructure on clean energy: big solutions gained from small features

Core-Shell Structured Ni@SiO2 Catalysts Exhibiting Excellent Catalytic Performance for Syngas Methanation Reactions

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