Carbon dioxide methanation over Ni catalysts supported on various metal oxides

Muroyama, Hiroki; Tsuda, Yuji; Asakoshi, Toshiki; Hasan, Mehdi; Okanishi, Takeou; Matsui, Toshiaki; Eguchi, Koichi

doi:10.1016/j.jcat.2016.07.018

Cited by 297 publications

(178 citation statements)

References 28 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%

“…The Ni/Al 2 O 3 catalyst shows a high catalytic activity, although it suffers from severe carbon deposition or poor stability due to the high reaction temperature used [88,90]. Therefore, the aim throughout the years was to develop catalysts able to show both high activity and resistance to carbonaceous deposits in the reaction.…”

Section: Alumina-supported Nickelmentioning

confidence: 99%

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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%

Section: Alumina-supported Nickelmentioning

confidence: 99%

Supported Catalysts for CO2 Methanation: A Review

et al. 2017

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“…The concentration of CH 4 is 1.7 ppm and N 2 O is 0.3 ppm. Hence their contribution to the greenhouse effect is less prominent than CO 2 [20,40]. At present, human beings globally face serious energy and environmental issues.…”

Section: Chlorofluorocarbons (Cfcs)mentioning

confidence: 99%

A Theoretical Study of the Effect of Salt Precipitation on CO2 Injectivity

Shaibu

Sokama‐Neuyam

Ursin

2018

Day 2 Thu, February 08, 2018

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Adequate well injectivity is required to successfully inject large volumes of CO2 through a minimum number of wells. Brine vaporization in the wellbore vicinity has been identified as a major CO2 injectivity impairment mechanism especially in deep saline reservoirs. A bundle-of-tubes model was developed to investigate basic mechanisms of salt precipitation and to quantify injectivity loss induced by precipitated salts during CO2 injection into saline formations. A Berea sandstone rock was reconstructed with a bundle-of-tubes model. A correlation was developed to estimate the solid salt saturation in the pores based on the properties of the aqueous phase. A parameter capable of tracking the development of the dry-out zone was introduced to model the distribution of salt in the pores. A relative injectivity change index was then used to quantify injectivity impairment induced by precipitated salts. A tortuosity factor was incorporated to account for the tortuous path taken by fluids in porous media. A sensitivity study was performed to assess the effects of parameters such as brine salinity, initial permeability, injection flowrate and porosity on injectivity loss. The model can reproduce some experimental results of drying of brine-saturated sandstone cores by supercritical CO2. A sensitivity study of the parameters affecting injectivity show that; (1) salt precipitation occurs in the dry-out zone where most of the irreducible water in the trapped brine has evaporated, (2) increasing brine salinity has adverse effect on injectivity, (3) salt precipitation affects permeability more than porosity and (4) in rocks with high initial permeability, salt precipitation is minimal. These findings are important for a successful CCS project since CO2 injectivity controls essential aspects of storage which are the rate, the quantity and length of time for CO2 injection into a formation.

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“…CH 4 demands have been increasing in recent years [9,10]. At present, Rh/γ-Al 2 O 3 [11,12], Ni/Al 2 O 3 [13,14], Ni/ZrO 2 [15][16][17], Ni/CeO 2 [17][18][19], Ni/USY zeolites [20,21], and Ni/La 2 O 3 [17,22] have been used for the catalytic hydrogenation of CO 2 to CH 4 . Among them, the Ni-based catalysts have been widely used in CO 2 hydrogenation due to their lower cost than the noble metal-based catalysts, high catalytic properties and they are easily obtainable [10,13,14,22].…”

Section: Introductionmentioning

confidence: 99%

Mn Modified Ni/Bsentonite for CO2 Methanation

et al. 2018

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To enhance the low-temperature catalytic activity and stability of Ni/bentonite catalyst, Ni-Mn/bentonite catalyst was prepared by introducing Mn into Ni/bentonite catalyst and was used for CO 2 methanation. The results indicated that the addition of Mn enhanced the interaction between the NiO and the bentonite carrier, increased the dispersion of the active component Ni and decreased the grain size of the active component Ni, increased the specific surface area and pore volume of the Ni/bentonite catalyst, and decreased the average pore size, which suppressed the aggregation of Ni particles grown during the CO 2 methanation process. At the same time, the Mn addition increased the amount of oxygen vacancies on the Ni/bentonite catalyst surface, which promoted the activation of CO 2 in the methanation reaction, increasing the low-temperature activity and stability of the Ni/bentonite catalyst. Under the reaction condition of atmospheric pressure, 270 • C, V(H 2 ):V(CO 2 ) = 4, and feed gas space velocity of 3600 mL·g cat −1 ·h −1 , the CO 2 conversion on the Ni-Mn/bentonite catalyst with 2wt% Mn was 85.2%, and the selectivity of CH 4 was 99.8%. On the other hand, when Mn was not added, the CO 2 conversion reached 84.7% and the reaction temperature only raised to 300 • C. During a 150-h stability test, the CO 2 conversion of Ni-2wt%Mn/bentonite catalyst decreased by 2.2%, while the CO 2 conversion of the Ni/bentonite catalyst decreased by 6.4%.

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Carbon dioxide methanation over Ni catalysts supported on various metal oxides

Cited by 297 publications

References 28 publications

Supported Catalysts for CO2 Methanation: A Review

Supported Catalysts for CO2 Methanation: A Review

A Theoretical Study of the Effect of Salt Precipitation on CO2 Injectivity

Mn Modified Ni/Bsentonite for CO2 Methanation

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