Hydrogenation of CO2 over nickel catalysts on rice husk ash-alumina prepared by incipient wetness impregnation

Chang, Feg-Wen; Kuo, Maw-Suey; Tsay, Ming-Tseh; Hsieh, Ming-Chung

doi:10.1016/s0926-860x(03)00181-9

Cited by 150 publications

(66 citation statements)

References 26 publications

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“…Supported Ni catalysts are the most widely investigated materials for CO 2 methanation due to their high efficiency in CH 4 production and low cost [75][76][77][78][79][80][81][82][83][84][85][86][87][88][89]. A lot of supports have been investigated for Ni catalysts since, as is well known, the catalytic performance strongly depends upon the nature and properties of the support.…”

Section: Nickel-based Catalystsmentioning

confidence: 99%

Supported Catalysts for CO2 Methanation: A Review

et al. 2017

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CO 2 methanation is a well-known reaction that is of interest as a capture and storage (CCS) process and as a renewable energy storage system based on a power-to-gas conversion process by substitute or synthetic natural gas (SNG) production. Integrating water electrolysis and CO 2 methanation is a highly effective way to store energy produced by renewables sources. The conversion of electricity into methane takes place via two steps: hydrogen is produced by electrolysis and converted to methane by CO 2 methanation. The effectiveness and efficiency of power-to-gas plants strongly depend on the CO 2 methanation process. For this reason, research on CO 2 methanation has intensified over the last 10 years. The rise of active, selective, and stable catalysts is the core of the CO 2 methanation process. Novel, heterogeneous catalysts have been tested and tuned such that the CO 2 methanation process increases their productivity. The present work aims to give a critical overview of CO 2 methanation catalyst production and research carried out in the last 50 years. The fundamentals of reaction mechanism, catalyst deactivation, and catalyst promoters, as well as a discussion of current and future developments in CO 2 methanation, are also included.

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Section: Nickel-based Catalystsmentioning

confidence: 99%

Supported Catalysts for CO2 Methanation: A Review

et al. 2017

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“…Thus, using a highly efficient catalyst is required to fully exploit the potential of the Sabatier reaction. Most of the research conducted in this field has dealt with the use of Ni-based catalysts [3,4,[7][8][9][10][11], although other transition (e.g., Fe and Co) [9,12] and noble (e.g., Rh, Pt, Ru and Pd) [12][13][14][15][16] metal based systems have also proven active.…”

Section: Introductionmentioning

confidence: 99%

An Alumina-Supported Ni-La-Based Catalyst for Producing Synthetic Natural Gas

et al. 2016

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LaNi 5 , known for its hydrogen storage capability, was adapted to the form of a metal oxide-supported (γ-Al 2 O 3 ) catalyst and its performance for the Sabatier reaction assessed. The 20 wt % La-Ni/γ-Al 2 O 3 particles were prepared via solution combustion synthesis (SCS) and exhibited good catalytic activity, achieving a CO 2 conversion of 75% with a high CH 4 selectivity (98%) at 1 atm and 300 • C. Characteristics of the La-Ni/γ-Al 2 O 3 catalyst were identified at various stages of the catalytic process (as-prepared, activated, and post-reaction) and in-situ DRIFTS was used to probe the reaction mechanism. The as-prepared catalyst contained amorphous surface La-Ni spinels with particle sizes <6 nm. The reduction process altered the catalyst make-up where, despite the reducing conditions, Ni 2+ -based particles with diameters between 4 and 20 nm decorated with LaO x moieties were produced. However, the post-reaction catalyst had particle sizes of 4-9 nm and comprised metallic Ni, with the LaO x decoration reverting to a form akin to the as-prepared catalyst. DRIFTS analysis indicated that formates and adsorbed CO species were present on the catalyst surface during the reaction, implying the reaction proceeded via a H 2 -assisted and sequential CO 2 dissociation to C and O. These were then rapidly hydrogenated into CH 4 and H 2 O.

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“…However, under controlled burning conditions it gives amorphous silica, which is highly reactive due to its ultrafine size and high surface area [17]. Instead of the silica gel (SiO 2 ) commonly used, rice husk ash has been first adopted as a catalyst support by Chang et al and found to exhibit a very high activity for the rice husk ash supported nickel catalysts in CO 2 hydrogenation [18]. Consequently, preparation of catalysts utilizing rice husk silica, which is composed of pure amorphous silica, is very attractive [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Structural and catalytic investigation of vanadia supported on ceria promoted with high surface area rice husk silica

Radhika

Sugunan

2006

Journal of Molecular Catalysis A: Chemical

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Rice husk silica was utilized as the promoter of ceria for preparing supported vanadia catalysts. Effect of vanadium content was investigated with 2-10 wt.% V 2 O 5 loading over the support. Structural characterization of the catalysts was done by various techniques like energy dispersive X-ray (EDX), X-ray diffraction (XRD), BET surface area, thermal analysis (TGA/DTA), FT-infrared spectroscopy (FT-IR), UV-vis diffused reflectance spectroscopy (DR UV-vis), electron paramagnetic spectroscopy (EPR) and solid state magnetic resonance spectroscopies ( 29 Si and 51 V MASNMR). Catalytic activity was studied towards liquid-phase oxidation of benzene. Surface area of ceria enhanced upon rice husk silica promotion, thus makes dispersion of the active sites of vanadia easier. Highly dispersed vanadia was found for low V 2 O 5 loading and formation of cerium orthovanadate (CeVO 4 ) occurs as the loading increases. Spectroscopic investigation clearly confirms the formation of CeVO 4 phase at higher loadings of V 2 O 5 . The oxidation activity increases with vanadia loading up to 8 wt.% V 2 O 5 , and further increase reduces the conversion rate. Selective formation of phenol can be attributed to the presence of highly dispersed active sites of vanadia over the support.

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Hydrogenation of CO2 over nickel catalysts on rice husk ash-alumina prepared by incipient wetness impregnation

Cited by 150 publications

References 26 publications

Supported Catalysts for CO2 Methanation: A Review

Supported Catalysts for CO2 Methanation: A Review

An Alumina-Supported Ni-La-Based Catalyst for Producing Synthetic Natural Gas

Structural and catalytic investigation of vanadia supported on ceria promoted with high surface area rice husk silica

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