Durability of Ni/TiO2 catalyst containing trace chlorine for CO selective methanation

Shimoda, Naohiro; Fujiwara, Masashi; Tani, Kazunori; Shoji, Daiki; Takahashi, Makoto; Akiyama, Kayo; Satokawa, Shigeo

doi:10.1016/j.apcata.2018.02.032

Cited by 15 publications

(11 citation statements)

References 59 publications

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“…Inhibition of carbon dioxide methanation reaction was reached by the presence of chlorine species on the support surface. Later, the same observation was also reported for Ni supported on TiO 2 and ZrO 2 catalysts . The first experience of depositing the Ni(Cl)/CeO 2 catalyst over metal substrate was quite promising, but not fully satisfied our expectations and needs.…”

Section: Introductionsupporting

confidence: 60%

Catalytic Performance and Characterization of Highly Efficient Composite Ni(Cl_x)/CeO₂/η‐Al₂O₃/FeCrAl Wire Mesh Catalysts for Preferential CO Methanation

et al. 2020

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Structured composite Ni(Cl x )/CeO 2 /η-Al 2 O 3 /FeCrAl catalysts are developed for the reaction of preferential methanation of carbon monoxide in the presence of carbon dioxide. The use of a FeCrAl alloy wire mesh as a support for Ni(Cl)/CeO 2 allows preparation of a heat-conducting catalyst that is similar in performance and physical-chemical properties to the highly efficient catalysts in the form of micro pellets, as confirmed by catalytic tests and XRD, XPS, TEM, SEM, EDX characterization techniques. Catalytic tests are carried out in hydrogen-rich mixture which contains (vol. %): 1 CO, 65 H 2 , 10 H 2 O, 20 CO 2 , He -balance; weight hourly space velocity is 29,000 cm 3 g cat À 1 h À 1 . The structured catalyst with highly dispersed nickel and optimal chlorine content provides CO removal to a level of < 10 ppm in the temperature interval of 230-300°C. XRD, TEM, SEM and EDX analysis confirm the presence of Ni nanoparticles and CeOCl species in the catalytic coating. XPS study of samples after reductive pretreatment (simulating CO preferential methanation reaction conditions) in the preparation chamber of the spectrometer reveals the metallic state of Ni and high concentrations of Cl and Ce 3 + on the catalyst surface.[a] Dr.

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Section: Introductionsupporting

confidence: 60%

Catalytic Performance and Characterization of Highly Efficient Composite Ni(Cl_x)/CeO₂/η‐Al₂O₃/FeCrAl Wire Mesh Catalysts for Preferential CO Methanation

et al. 2020

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“…Currently, Ni-based catalysts supported on various materials have been extensively reported in CO-SMET. [7][8][9][10] In particular, Ni/Al 2 O 3 catalyst draws a lot of attention due to the large specific surface area, rich porosity, and excellent stability. 11,12 However, the spinel phase NiAl 2 O 4 is inevitably formed by active Ni and Al 2 O 3 and is hard to be reduced, 13 leading to a decreased amount of active Ni and low catalytic performance.…”

Section: Introductionmentioning

confidence: 99%

“…Currently, Ni‐based catalysts supported on various materials have been extensively reported in CO‐SMET 7‐10 . In particular, Ni/Al 2 O 3 catalyst draws a lot of attention due to the large specific surface area, rich porosity, and excellent stability 11,12 .…”

Section: Introductionmentioning

confidence: 99%

Zr‐promoted nickel‐rich spinel‐supported Ni catalysts with enhanced performance for selective CO methanation

Ping

Wan

Zhao

et al. 2022

Intl J of Energy Research

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CO selective methanation (CO-SMET) is an efficient hydrogen purification technology for proton exchange membrane fuel cells. The development of nonnoble metal-based catalysts is quite essential and imperative for CO-SMET and has received considerable interest. Herein, a Zr-promoted nickel-rich spinel-supported Ni catalyst (Ni-ZrO 2 /NiAl 2 O 4 ) was acquired by an epoxidedriven sol-gel process and associated co-impregnation method. The usage of ZrO 2 could enhance the reducibility of the Ni oxides and promote the formation of small Ni particles size, then effectively increase the sorption capacities for both H 2 and CO and facilitate the CO dissociation from catalyst surfaces.All these endowed the catalyst with excellent catalytic performance for CO-SMET, which could lower the CO outlet level to less than 10 ppm with the selectivity higher than 50% within a large temperature window (185 C-255 C).Additionally, the catalyst was highly stable with no obvious carbon deposition or performance degradation during the long-term stability test. This work offers a new technical route to build highly efficient nickel-rich spinelsupported catalysts in the production of high-quality hydrogen.

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“…In the last decade, most researchers have devoted to preparing various Ni-based catalysts (SiO 2 , 7,8 Al 2 O 3 , 9,10 TiO 2 , 11,12 ZrO 2 , 13,14 and CeO 2 15 ) for the CO methanation. The methanation activity of Ni-based catalysts is strongly dependent upon the nature of the support material.…”

Section: Introductionmentioning

confidence: 99%

“…In the last decade, most researchers have devoted to preparing various Ni-based catalysts (SiO 2 , , Al 2 O 3 , , TiO 2 , , ZrO 2 , , and CeO 2 ) for the CO methanation. The methanation activity of Ni-based catalysts is strongly dependent upon the nature of the support material. , Le’s group has demonstrated activity increase following the sequence: Ni/γ-Al 2 O 3 < Ni/SiO 2 < Ni/TiO 2 < Ni/ZrO 2 < Ni/CeO 2 in the CO methanation reaction. , Lay and co-workers pointed out that the Ni electron cloud density was enhanced by electrons transferred from CeO 2 .…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient La_xCe_1–xO_2–x/2 Nanorod-Supported Nickel Catalysts for CO Methanation: Effect of La Addition

et al. 2021

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A group of ternary La x Ce1–x O2–x/2 nanorods with varying La/Ce ratios have been prepared by the hydrothermal strategy and further used to synthesize supported nickel catalysts for CO methanation. The optimal Ni/La0.15Ce0.85O1.925 catalyst showed remarkably improved activity and excellent resistance against coke formation compared with Ni/CeO2. The characterization results demonstrated that doping of La2O3 into CeO2 resulted in decreased grain size of Ni particles and increased Ni electron cloud density induced by the creation of more oxygen vacancies due to substituting La3+ for Ce4+, which were responsible for accelerating CO dissociation and eventually improved CO methanation activity. More importantly, the enhanced oxygen vacancies were helpful to improve the anticoking properties through eliminating the deposited carbon species. These studies shed light on the design of a catalyst with both outstanding activity at low temperatures and reliable stability at high temperatures for the CO methanation reaction.

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Durability of Ni/TiO2 catalyst containing trace chlorine for CO selective methanation

Cited by 15 publications

References 59 publications

Catalytic Performance and Characterization of Highly Efficient Composite Ni(Cl_x)/CeO₂/η‐Al₂O₃/FeCrAl Wire Mesh Catalysts for Preferential CO Methanation

Catalytic Performance and Characterization of Highly Efficient Composite Ni(Cl_x)/CeO₂/η‐Al₂O₃/FeCrAl Wire Mesh Catalysts for Preferential CO Methanation

Zr‐promoted nickel‐rich spinel‐supported Ni catalysts with enhanced performance for selective CO methanation

Highly Efficient La_xCe_1–xO_2–x/2 Nanorod-Supported Nickel Catalysts for CO Methanation: Effect of La Addition

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Durability of Ni/TiO2 catalyst containing trace chlorine for CO selective methanation

Cited by 15 publications

References 59 publications

Catalytic Performance and Characterization of Highly Efficient Composite Ni(Clx)/CeO2/η‐Al2O3/FeCrAl Wire Mesh Catalysts for Preferential CO Methanation

Catalytic Performance and Characterization of Highly Efficient Composite Ni(Clx)/CeO2/η‐Al2O3/FeCrAl Wire Mesh Catalysts for Preferential CO Methanation

Zr‐promoted nickel‐rich spinel‐supported Ni catalysts with enhanced performance for selective CO methanation

Highly Efficient LaxCe1–xO2–x/2 Nanorod-Supported Nickel Catalysts for CO Methanation: Effect of La Addition

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Catalytic Performance and Characterization of Highly Efficient Composite Ni(Cl_x)/CeO₂/η‐Al₂O₃/FeCrAl Wire Mesh Catalysts for Preferential CO Methanation

Catalytic Performance and Characterization of Highly Efficient Composite Ni(Cl_x)/CeO₂/η‐Al₂O₃/FeCrAl Wire Mesh Catalysts for Preferential CO Methanation

Highly Efficient La_xCe_1–xO_2–x/2 Nanorod-Supported Nickel Catalysts for CO Methanation: Effect of La Addition