scholarly journals Influence of Ni on Fe and Co-Fe Based Catalysts for High-Calorific Synthetic Natural Gas

Catalysts ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 697
Author(s):  
Tae-Young Kim ◽  
Seongbin Jo ◽  
Yeji Lee ◽  
Suk-Hwan Kang ◽  
Joon-Woo Kim ◽  
...  
Keyword(s):  
Natural Gas ◽  
Catalytic Performance ◽  
Impregnation Method ◽  
Ni Catalysts ◽  
Hydrocarbon Production ◽  
Synthetic Natural Gas ◽  
Fe Catalyst ◽  
Ni Addition ◽  
Hydrocarbon Yield ◽  
Fe Catalysts

Fe-Ni and Co-Fe-Ni catalysts were prepared by the wet impregnation method for the production of high-calorific synthetic natural gas. The influence of Ni addition to Fe and Co-Fe catalyst structure and catalytic performance was investigated. The results show that the increasing of Ni amount in Fe-Ni and Co-Fe-Ni catalysts increased the formation of Ni-Fe alloy. In addition, the addition of nickel to the Fe and Co-Fe catalysts could promote the dispersion of metal and decrease the reduction temperature. Consequently, the Fe-Ni and Co-Fe-Ni catalysts exhibited higher CO conversion compared to Fe and Co-Fe catalysts. A higher Ni amount in the catalysts could increase C1–C4 hydrocarbon production and reduce the byproducts (C5+ and CO2). Among the catalysts, the 5Co-15Fe-5Ni/γ-Al2O3 catalyst affords a high light hydrocarbon yield (51.7% CH4 and 21.8% C2–C4) with a low byproduct yield (14.1% C5+ and 12.1% CO2).

CO2 valorization into synthetic natural gas (SNG) using a Co–Ni bimetallic Y2O3 based catalysts

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Radwa A. El-Salamony ◽  
Sara A. El-Sharaky ◽  
Seham A. Al-Temtamy ◽  
Ahmed M. Al-Sabagh ◽  
Hamada M. Killa
Keyword(s):  
Reaction Mechanism ◽  
Natural Gas ◽  
Fixed Bed ◽  
Catalytic Performance ◽  
Fixed Bed Reactor ◽  
Molar Ratio ◽  
Impregnation Method ◽  
Synthetic Natural Gas ◽  
Methanation Reaction ◽  
Co2 Valorization

Abstract Recently, because of the increasing demand for natural gas and the reduction of greenhouse gases, interests have focused on producing synthetic natural gas (SNG), which is suggested as an important future energy carrier. Hydrogenation of CO2, the so-called methanation reaction, is a suitable technique for the fixation of CO2. Nickel supported on yttrium oxide and promoted with cobalt were prepared by the wet-impregnation method respectively and characterized using SBET, XRD, FTIR, XPS, TPR, and HRTEM/EDX. CO2 hydrogenation over the Ni/Y2O3 catalyst was examined and compared with Co–Ni/Y2O3 catalysts, Co% = 10 and 15 wt/wt. The catalytic test was conducted with the use of a fixed-bed reactor under atmospheric pressure. The catalytic performance temperature was 350 °C with a supply of H2:CO2 molar ratio of 4 and a total flow rate of 200 mL/min. The CH4 yield was reached 67%, and CO2 conversion extended 48.5% with CO traces over 10Co–Ni/Y2O3 catalyst. This encourages the direct methanation reaction mechanism. However, the reaction mechanism over Ni/Y2O3 catalyst shows different behaviors rather than that over bi-metal catalysts, whereas the steam reforming of methane reaction was arisen associated with methane consumption besides increase in H2 and CO formation; at the same temperature reaction.

scholarly journals Surface Structure and Catalytic Performance of Ni-Fe Catalyst for Low-Temperature CO Hydrogenation

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Fanhui Meng ◽  
Pengzhan Zhong ◽  
Zhong Li ◽  
Xiaoxi Cui ◽  
Huayan Zheng
Keyword(s):  
Low Temperature ◽  
Iron Content ◽  
Co Hydrogenation ◽  
Catalytic Performance ◽  
Incipient Wetness Impregnation ◽  
Impregnation Method ◽  
Synthetic Natural Gas ◽  
Fe Catalyst ◽  
Ni Species ◽  
Shift Reaction

Catalysts 16NixFe/Al2O3(xis 0, 1, 2, 4, 6, 8) were prepared by incipient wetness impregnation method and the catalytic performance for the production of synthetic natural gas (SNG) from CO hydrogenation in slurry-bed reactor were studied. The catalysts were characterized by BET, XRD, UV-Vis DRS, H2-TPR, CO-TPD, and XPS, and the results showed that the introduction of iron improved the dispersion of Ni species, weakened the interaction between Ni species and support and decreased the reduction temperature and that catalyst formed Ni-Fe alloy when the content of iron exceeded 2%. Experimental results revealed that the addition of iron to the catalyst can effectively improve the catalytic performance of low-temperature CO methanation. Catalyst 16Ni4Fe/Al2O3with the iron content of 4% exhibited the best catalytic performance, the conversion of CO and the yield of CH4reached 97.2% and 84.9%, respectively, and the high catalytic performance of Ni-Fe catalyst was related to the property of formed Ni-Fe alloy. Further increase of iron content led to enhancing the water gas shift reaction.

scholarly journals Novel Ni/MgO Catalysts from Mesoporous MgCO3 for Highly Efficient CO Methanation: Effects of Al and Si Stabilization

2020 ◽  
Author(s):  
Wenming Hao ◽  
Maria Vall ◽  
Yufei Shi ◽  
Qianqian Wang ◽  
Maria Strømme ◽  
...  
Keyword(s):  
Natural Gas ◽  
High Selectivity ◽  
Cost Effective ◽  
Catalytic Performance ◽  
Magnesium Carbonate ◽  
Co Methanation ◽  
Synthetic Natural Gas ◽  
Effective Catalyst ◽  
Highly Efficient ◽  
Co Conversion

Methanation of syngas is a possible way to produce synthetic natural gas. Ni has been proven to be a good and cost-effective catalyst for this reaction. Here we have synthesized Ni/MgO catalyst using mesoporous magnesium carbonate (MMC) as a precursor. Addition of Al<sub>2</sub>O<sub>3</sub> and SiO<sub>2</sub> to MMC were made and the different MMC based materials were then impregnated with Ni(NO<sub>3</sub>)<sub>2</sub> and calcined to generate the catalysts. Addition of Al<sub>2</sub>O<sub>3</sub> showed an improvement in the catalytic performance compared to the NiO/MgO catalyst. The catalyst containing Al<sub>2</sub>O<sub>3</sub> had a CO conversion close to 100 % at 350 °C and a high selectivity and yield for CH<sub>4</sub>. The better performance of the aluminum containing catalyst was believed to be an effect of a better dispersion of Ni at the surface of the catalyst<br>

Synthetic natural gas by direct CO2 hydrogenation on activated takovites: effect of Ni/Al molar ratio

2016 ◽  
Vol 6 (7) ◽  
pp. 2305-2317 ◽  
Author(s):  
S. Abelló ◽  
C. Berrueco ◽  
F. Gispert-Guirado ◽  
D. Montané
Keyword(s):  
Natural Gas ◽  
Catalytic Performance ◽  
Co2 Hydrogenation ◽  
Molar Ratio ◽  
Synthetic Natural Gas

Small Ni0 crystallites dispersed over a NiAl2O4 matrix, attained from takovite-like precursors, induced high catalytic performance in CO2 methanation.

CO2 methanation over a Ni based ordered mesoporous catalyst for the production of synthetic natural gas

RSC Advances ◽  
2016 ◽  
Vol 6 (34) ◽  
pp. 28489-28499 ◽  
Author(s):  
Leilei Xu ◽  
Fagen Wang ◽  
Mindong Chen ◽  
Jian Zhang ◽  
Kaidi Yuan ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Natural Gas ◽  
Structural Properties ◽  
Catalytic Performance ◽  
Mesoporous Catalyst ◽  
Co2 Methanation ◽  
Synthetic Natural Gas ◽  
Ordered Mesoporous

A Ni based ordered mesoporous catalyst with excellent structural properties and thermal stability promised enhanced catalytic performance toward CO2 methanation.

Mg-Al oxide supported Ni catalysts with enhanced stability for efficient synthetic natural gas from syngas

2014 ◽  
Vol 307 ◽  
pp. 682-688 ◽  
Author(s):  
Mei-Ting Fan ◽  
Kun-Peng Miao ◽  
Jing-Dong Lin ◽  
Hong-Bin Zhang ◽  
Dai-Wei Liao
Keyword(s):  
Natural Gas ◽  
Ni Catalysts ◽  
Synthetic Natural Gas ◽  
Supported Ni Catalysts ◽  
Supported Ni ◽  
Al Oxide ◽  
Enhanced Stability

scholarly journals Well-Dispersed MgAl2O4 Supported Ni Catalyst with Enhanced Catalytic Performance and the Reason of Its Deactivation for Long-Term Dry Methanation Reaction

Catalysts ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1117
Author(s):  
Fen Wang ◽  
Xiumiao Yang ◽  
Jingcai Zhang
Keyword(s):  
Catalyst Deactivation ◽  
Catalytic Performance ◽  
Gas Production ◽  
Ni Catalyst ◽  
Incipient Wetness Impregnation ◽  
Impregnation Method ◽  
Synthetic Natural Gas ◽  
Methanation Reaction ◽  
Supported Ni Catalyst

Dry methanation of syngas is a promising route for synthetic natural gas production because of its water and cost saving characteristics, as we reported previously. Here, we report a simple soaking process for the preparation of well-dispersed Ni/MgAl2O4-E catalyst with an average Ni size of 6.4 nm. The catalytic test results showed that the Ni/MgAl2O4-E catalyst exhibited considerably higher activity and better stability than Ni/MgAl2O4-W catalyst prepared by conventional incipient wetness impregnation method in dry methanation reaction. The long-term stability test result of 335 h has demonstrated that the deactivation of the Ni/MgAl2O4-E catalyst is inevitable. With multiple characterization techniques including ICP, EDS, XRD, STEM, TEM, SEM and TG, we reveal that the graphitic carbon encapsulating Ni nanoparticles are the major reasons responsible for catalyst deactivation, and the rate of carbon deposition decreases with reaction time.

scholarly journals Catalytic Performance of Metal Oxides Promoted Nickel Catalysts Supported on Mesoporous γ-Alumina in Dry Reforming of Methane

Processes ◽  
2020 ◽  
Vol 8 (5) ◽  
pp. 522
Author(s):  
Anis H. Fakeeha ◽  
Abdulaziz A. Bagabas ◽  
Mahmud S. Lanre ◽  
Ahmed I. Osman ◽  
Samsudeen O. Kasim ◽  
...  
Keyword(s):  
Metal Oxides ◽  
Nickel Catalysts ◽  
Catalytic Performance ◽  
Dry Reforming ◽  
Coke Deposition ◽  
Dry Reforming Of Methane ◽  
Catalyst Stability ◽  
Incipient Wetness Impregnation ◽  
Impregnation Method ◽  
Ni Catalysts

Dry reforming of CH4 was conducted over promoted Ni catalysts, supported on mesoporous gamma-alumina. The Ni catalysts were promoted by various metal oxides (CuO, ZnO, Ga2O3, or Gd2O3) and were synthesized by the incipient wetness impregnation method. The influence of the promoters on the catalyst stability, coke deposition, and H2/CO mole ratio was investigated. Stability tests were carried out for 460 min. The H2 yield was 87% over 5Ni+1Gd/Al, while the CH4 and CO2 conversions were found to decrease in the following order: 5Ni+1Gd/Al > 5Ni+1Ga/Al > 5Ni+1Zn/Al > 5Ni/Al > 5Ni+1Cu/Al. The high catalytic performance of 5Ni+1Gd/Al, 5Ni+1Ga/Al, and 5Ni+1Zn/Al was found to be closely related to their contents of NiO species, which interacted moderately and strongly with the support, whereas free NiO in 5Ni+1Cu/Al made it catalytically inactive, even than 5Ni/Al. The 5Ni+1Gd/Al catalyst showed the highest CH4 conversion of 83% with H2/CO mole ratio of ~1.0.

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