Effect of Rutile Content on the Catalytic Performance of Ru/TiO2 Catalyst for Low-Temperature CO2 Methanation

2021 ◽  
Author(s):  
Zhiying Zhao ◽  
Qiaorong Jiang ◽  
Qiuxiang Wang ◽  
Mingzhi Wang ◽  
Jiachang Zuo ◽  
...  
Keyword(s):  
Low Temperature ◽  
Catalytic Performance ◽  
Co2 Methanation ◽  
Tio2 Catalyst

Effect of TiO2 crystal structure on the catalytic performance of Co3O4/TiO2 catalyst for low-temperature CO oxidation

2014 ◽  
Vol 4 (5) ◽  
pp. 1268-1275 ◽  
Author(s):  
Jie Li ◽  
Guanzhong Lu ◽  
Guisheng Wu ◽  
Dongsen Mao ◽  
Yanglong Guo ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Low Temperature ◽  
Co Oxidation ◽  
Catalytic Performance ◽  
Precipitation Method ◽  
Tio2 Catalyst ◽  
Excellent Activity ◽  
Low Temperature Co Oxidation

Co3O4 supported on TiO2 (anatase (A), rutile (R) and P25 (Degussa)) catalysts were prepared by a deposition–precipitation method. Co3O4/TiO2 (A) shows excellent activity for CO oxidation with 100% conversion at −43 °C.

Enhanced low-temperature activity of CO2 methanation over highly-dispersed Ni/TiO2 catalyst

2013 ◽  
Vol 3 (10) ◽  
pp. 2627 ◽  
Author(s):  
Jie Liu ◽  
Changming Li ◽  
Fei Wang ◽  
Shan He ◽  
Hao Chen ◽  
...  
Keyword(s):  
Low Temperature ◽  
Co2 Methanation ◽  
Tio2 Catalyst ◽  
Highly Dispersed

scholarly journals Co-Promoted Ni Nanocatalysts Derived from NiCoAl-LDHs for Low Temperature CO2 Methanation

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 121
Author(s):  
Fanying Zhang ◽  
Bin Lu ◽  
Peiqin Sun
Keyword(s):  
Low Temperature ◽  
Active Sites ◽  
High Performance ◽  
Carbon Deposition ◽  
Catalytic Performance ◽  
Ni Nanoparticles ◽  
Co2 Methanation ◽  
Test Conditions ◽  
Challenging Research ◽  
Continuous Reaction

Ni-based catalysts are prone to agglomeration and carbon deposition at high temperatures. Therefore, the development of Ni-based catalysts with high activities at low temperatures is a very urgent and challenging research topic. Herein, Ni-based nanocatalysts containing Co promoter with mosaic structure were prepared by reduction of NiCoAl-LDHs, and used for CO2 methanation. When the reaction temperature is 250 °C (0.1 MPa, GHSV = 30,000 mL·g−1·h−1), the conversion of CO2 on the NiCo0.5Al-R catalyst reaches 81%. However, under the same test conditions, the conversion of CO2 on the NiAl-R catalyst is only 26%. The low-temperature activity is significantly improved due to Co which can effectively control the size of the Ni particles, so that the catalyst contains more active sites. The CO2-TPD results show that the Co can also regulate the number of moderately basic sites in the catalyst, which is beneficial to increase the amount of CO2 adsorbed. More importantly, the NiCo0.5Al-R catalyst still maintains high catalytic performance after 92 h of continuous reaction. This is due to the confinement effect of the AlOx substrate inhibiting the agglomeration of Ni nanoparticles. The Ni-based catalysts with high performance at low temperature and high stability prepared by the method used have broad industrial application prospects.

Catalytic performance of Ni catalysts supported on CeO2 with different morphologies for low-temperature CO2 methanation

2020 ◽  
Author(s):  
Thapanee Jomjaree ◽  
Paweennut Sintuya ◽  
Atthapon Srifa ◽  
Wanida Koo-amornpattana ◽  
Sirapassorn Kiatphuengporn ◽  
...  
Keyword(s):  
Low Temperature ◽  
Catalytic Performance ◽  
Ni Catalysts ◽  
Co2 Methanation

scholarly journals Insight into the Promoting Role of Er Modification on SO2 Resistance for NH3-SCR at Low Temperature over FeMn/TiO2 Catalysts

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 618
Author(s):  
Huan Du ◽  
Zhitao Han ◽  
Xitian Wu ◽  
Chenglong Li ◽  
Yu Gao ◽  
...  
Keyword(s):  
Low Temperature ◽  
Catalyst Surface ◽  
Impregnation Method ◽  
In Situ Drifts ◽  
Tio2 Catalyst ◽  
Nh3 Scr ◽  
Nh3 Adsorption ◽  
So2 Resistance ◽  
Fast Scr

Er-modified FeMn/TiO2 catalysts were prepared through the wet impregnation method, and their NH3-SCR activities were tested. The results showed that Er modification could obviously promote SO2 resistance of FeMn/TiO2 catalysts at a low temperature. The promoting effect and mechanism were explored in detail using various techniques, such as BET, XRD, H2-TPR, XPS, TG, and in-situ DRIFTS. The characterization results indicated that Er modification on FeMn/TiO2 catalysts could increase the Mn4+ concentration and surface chemisorbed labile oxygen ratio, which was favorable for NO oxidation to NO2, further accelerating low-temperature SCR activity through the “fast SCR” reaction. As fast SCR reaction could accelerate the consumption of adsorbed NH3 species, it would benefit to restrain the competitive adsorption of SO2 and limit the reaction between adsorbed SO2 and NH3 species. XPS results indicated that ammonium sulfates and Mn sulfates formed were found on Er-modified FeMn/TiO2 catalyst surface seemed much less than those on FeMn/TiO2 catalyst surface, suggested that Er modification was helpful for reducing the generation or deposition of sulfate salts on the catalyst surface. According to in-situ DRIFTS the results of, the presence of SO2 in feeding gas imposed a stronger impact on the NO adsorption than NH3 adsorption on Lewis acid sites of Er-modified FeMn/TiO2 catalysts, gradually making NH3-SCR reaction to proceed in E–R mechanism rather than L–H mechanism. DRIFTS.

scholarly journals Improvement of Ni/Al2O3 Catalysts for Low-Temperature CO2 Methanation by Vanadium and Calcium Oxide Addition

2021 ◽  
Author(s):  
Gabriella Garbarino ◽  
Paweł Kowalik ◽  
Paola Riani ◽  
Katarzyna Antoniak-Jurak ◽  
Piotr Pieta ◽  
...  
Keyword(s):  
Low Temperature ◽  
Calcium Oxide ◽  
Co2 Methanation ◽  
Oxide Addition

scholarly journals Bimetallic Ni-Based Catalysts for CO2 Methanation: A Review

Nanomaterials ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 28
Author(s):  
Anastasios I. Tsiotsias ◽  
Nikolaos D. Charisiou ◽  
Ioannis V. Yentekakis ◽  
Maria A. Goula
Keyword(s):  
Low Temperature ◽  
Noble Metals ◽  
Recent Progress ◽  
Low Cost ◽  
Alloy Formation ◽  
Co2 Methanation ◽  
High Performing ◽  
Mobile Sources ◽  
Low Dispersion ◽  
Made In

CO2 methanation has recently emerged as a process that targets the reduction in anthropogenic CO2 emissions, via the conversion of CO2 captured from point and mobile sources, as well as H2 produced from renewables into CH4. Ni, among the early transition metals, as well as Ru and Rh, among the noble metals, have been known to be among the most active methanation catalysts, with Ni being favoured due to its low cost and high natural abundance. However, insufficient low-temperature activity, low dispersion and reducibility, as well as nanoparticle sintering are some of the main drawbacks when using Ni-based catalysts. Such problems can be partly overcome via the introduction of a second transition metal (e.g., Fe, Co) or a noble metal (e.g., Ru, Rh, Pt, Pd and Re) in Ni-based catalysts. Through Ni-M alloy formation, or the intricate synergy between two adjacent metallic phases, new high-performing and low-cost methanation catalysts can be obtained. This review summarizes and critically discusses recent progress made in the field of bimetallic Ni-M (M = Fe, Co, Cu, Ru, Rh, Pt, Pd, Re)-based catalyst development for the CO2 methanation reaction.

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