scholarly journals Synthesis of higher alcohols from CO 2 hydrogenation over a PtRu/Fe 2 O 3 catalyst under supercritical condition

2015 ◽  
Vol 373 (2057) ◽  
pp. 20150006 ◽  
Author(s):  
Zhenhong He ◽  
Qingli Qian ◽  
Zhaofu Zhang ◽  
Qinglei Meng ◽  
Huacong Zhou ◽  
...  
Keyword(s):  
High Activity ◽  
Bimetallic Catalysts ◽  
Supercritical Condition ◽  
Molar Ratio ◽  
Higher Alcohols ◽  
Obvious Change ◽  
Heterogeneous Hydrogenation ◽  
Hydrogenation Of Co

Hydrogenation of CO 2 to alcohols is of great importance, especially when producing higher alcohols. In this work, we synthesized heterogeneous PtRu/Fe 2 O 3 , in which the Pt and Ru bimetallic catalysts were supported on Fe 2 O 3 . The catalyst was used to catalyse CO 2 hydrogenation to alcohols. It was demonstrated that the activity and selectivity could be tuned by the bimetallic composition, and the catalyst with a Pt to Ru molar ratio of 1:2 (Pt 1 Ru 2 /Fe 2 O 3 ) had high activity and selectivity at 200°C, which is very low for heterogeneous hydrogenation of CO 2 to produce higher alcohols. The conversion and the selectivity increased with increasing pressures of CO 2 and/or H 2 . The catalyst could be reused at least five times without any obvious change in activity or selectivity.

Properties of silica-supported Cu/Co bimetallic catalysts in the synthesis of higher alcohols

1990 ◽  
Vol 65 (2) ◽  
pp. 281-292 ◽  
Author(s):  
J.E. Baker ◽  
R. Burch ◽  
S.J. Hibble ◽  
P.K. Loader
Keyword(s):  
Bimetallic Catalysts ◽  
Higher Alcohols

CO2 conversion to synthesis gas via DRM on the durable Al2O3/Ni/Al2O3 sandwich catalyst with high activity and stability

2018 ◽  
Vol 20 (12) ◽  
pp. 2781-2787 ◽  
Author(s):  
Yu Zhao ◽  
Yunqing Kang ◽  
Hui Li ◽  
Hexing Li
Keyword(s):  
High Activity ◽  
Synthesis Gas ◽  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Molar Ratio ◽  
Co2 Conversion

CO2 conversion to synthesis gas with a CO/H2 molar ratio around 1 was realized by using the dry reforming of methane reaction (DRM) at 800 °C.

Recent developments in the catalytic hydrogenation of CO2 to formic acid/formate using heterogeneous catalysts

2016 ◽  
Vol 3 (7) ◽  
pp. 882-895 ◽  
Author(s):  
Gunniya Hariyanandam Gunasekar ◽  
Kwangho Park ◽  
Kwang-Deog Jung ◽  
Sungho Yoon
Keyword(s):  
Formic Acid ◽  
Catalytic Hydrogenation ◽  
Heterogeneous Catalysts ◽  
Hydrogenation Of Co2 ◽  
Recent Developments ◽  
Recent Trends ◽  
Heterogeneous Hydrogenation ◽  
Hydrogenation Of Co

This review highlights the recent trends in the heterogeneous hydrogenation of CO2 to formic acid/formate.

The Effect of CO Pretreatment on Fe/ADM Catalyst for Higher Alcohols Synthesis from Syngas

2011 ◽  
Vol 347-353 ◽  
pp. 3772-3776
Author(s):  
Hai Cheng Xiao ◽  
Fan Hua Kong ◽  
Gui Zhi Wang ◽  
Si Han Wang ◽  
Gang Wang ◽  
...  
Keyword(s):  
High Activity ◽  
Synthesis Gas ◽  
Iron Carbide ◽  
Catalytic Performance ◽  
Higher Alcohols ◽  
Xps Spectra ◽  
Higher Alcohols Synthesis ◽  
Hydrocarbons Synthesis

The catalyst of FeS modified K2CO3/MoS2 (ADM) (Fe/ADM) were prepared and tested for higher alcohols (C2+OH) synthesis (HAS) from synthesis gas(syngas, mixture of H2 and CO). The effects of CO pretreatment on Fe/ADM catalyst and the catalytic performance for HAS were investigated. The ability for C2+OH formation was enhanced and the hydrocarbon selectivity was lowered after CO pretreatment. The XPS spectra revealed that the iron carbide species appeared and the potassium enriched on the surface of CO pretreated Fe/ADM catalyst, which might be responsible for the high activity of higher alcohols and low hydrocarbons synthesis, respectively.

Tuning chemical compositions of bimetallic AuPd catalysts for selective catalytic hydrogenation of halogenated quinolines

2017 ◽  
Vol 5 (7) ◽  
pp. 3260-3266 ◽  
Author(s):  
Sai Zhang ◽  
Zhaoming Xia ◽  
Ting Ni ◽  
Huan Zhang ◽  
Chao Wu ◽  
...  
Keyword(s):  
High Activity ◽  
Catalytic Hydrogenation ◽  
Bimetallic Catalysts ◽  
Selective Adsorption ◽  
Chemical Compositions

Au1−xPdx bimetallic catalysts with low Pd entities on CeO2 nanorods delivered high activity and chemoselectivity for hydrogenation of halogenated quinolines. Improved chemoselectivity could be attributed to the selective adsorption configurations of halogenated quinolines on Au via tilted orientation rather than on Pd via flat orientation.

Base-free hydrogenation of CO2 to formic acid in water with an iridium complex bearing a N,N′-diimine ligand

2016 ◽  
Vol 18 (16) ◽  
pp. 4553-4558 ◽  
Author(s):  
Sheng-Mei Lu ◽  
Zhijun Wang ◽  
Jun Li ◽  
Jianliang Xiao ◽  
Can Li
Keyword(s):  
Formic Acid ◽  
High Activity ◽  
Iridium Complex ◽  
Hydrogenation Of Co2 ◽  
Diimine Ligand ◽  
Hydrogenation Of Co

Hydrogenation of CO2 in the absence of a base in water is achieved with high activity using an iridium complex bearing a non-aromatic N,N′-diimine ligand.

scholarly journals Effects of Al and Co Promoters on CuO/SBA-15/Kaolinite Catalyst Properties and CO2 Hydrogenation at Low Pressure

2021 ◽  
Vol 259 ◽  
pp. 04001
Author(s):  
Zane Abelniece ◽  
Valdis Kampars ◽  
Helle-Mai Piirsoo ◽  
Aile Tamm
Keyword(s):  
Fixed Bed ◽  
Mesoporous Structure ◽  
Xrd Analysis ◽  
Hydrogenation Reaction ◽  
Molar Ratio ◽  
Impregnation Method ◽  
Kaolinite Clay ◽  
Post Synthesis ◽  
Adsorption Desorption ◽  
Hydrogenation Of Co

CuO on mesoporous silica catalyst was prepared with post synthesis impregnation method, and the effects of Al and Co promoters on CuO/SBA-15/kaolinite catalyst properties and CO2 hydrogenation were studied. The mixing technology with kaolinite clay (containing Al2O3) was used to obtain the granules and to enhance the CO2 conversion to methanol as a product. The performance of all catalysts for catalytic hydrogenation of CO2 was evaluated on a fixed-bed tubular micro-activity reactor at 20 bar and 250°C with H2/CO2 molar ratio 3:1. XRD analysis, N2 adsorption-desorption analysis and SEM-EDX analysis indicated that the mesoporous structure of SBA-15 remains after loading with CuO and promoters, and after mixing with kaolinite clay. Results were compared with results obtained with commercial CuO/Al2O3 catalyst, which showed high MeOH selectivity (78%) during CO2 hydrogenation reaction.

scholarly journals Pd–Au Bimetallic Catalysts for the Hydrogenation of Muconic Acid to Bio-Adipic Acid

Catalysts ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1313
Author(s):  
Sofia Capelli ◽  
Ilaria Barlocco ◽  
Federico Maria Scesa ◽  
Xiaohui Huang ◽  
Di Wang ◽  
...  
Keyword(s):  
Adipic Acid ◽  
Bimetallic Catalysts ◽  
Batch Reactor ◽  
Hydrogenation Reaction ◽  
Molar Ratio ◽  
Muconic Acid ◽  
Bimetallic Nanoparticle ◽  
Heat Treated ◽  
Temperature Heat ◽  
Treated Carbon

The hydrogenation reaction of muconic acid, produced from biomass using fermentative processes, to bio-adipic acid is one of the most appealing green emerging chemical process. This reaction can be promoted by catalysts based on a metal belonging to the platinum group, and the use of a second metal can preserve and increase their activity. Pd–Au bimetallic nanoparticle samples supported on high-temperature, heat-treated carbon nanofibers were prepared using the sol immobilization method, changing the Pd–Au molar ratio. These catalysts were characterized by TEM, STEM, and XPS analysis and tested in a batch reactor pressurized with hydrogen, where muconic acid dissolved in water was converted to adipic acid. The synthesized Pd–Au bimetallic catalysts showed higher activity than monometallic Au and Pd material and better stability during the recycling tests. Moreover, the selectivity toward the mono-unsaturated changed by decreasing the Pd/Au molar ratio: the higher the amount of gold, the higher the selectivity toward the intermediates.

Low-Temperature Catalytic Combustion of VOCs over MnOx–ZnO Mixed Oxides Supported on Cordierite Ceramic

2014 ◽  
Vol 989-994 ◽  
pp. 671-675
Author(s):  
Qiong Huang ◽  
Ying Wen Chen ◽  
Shu Bao Shen ◽  
Min Dong Chen
Keyword(s):  
Low Temperature ◽  
High Activity ◽  
Calcination Temperature ◽  
Catalytic Combustion ◽  
Mixed Oxides ◽  
Molar Ratio ◽  
Complete Combustion ◽  
Preparation Conditions ◽  
Cordierite Ceramic ◽  
And Performance

Catalytic combustion of VOCs was investigated over Mn–Zn mixed oxides supported on cordierite ceramic (Cord) and over the promoted Mn-Zn oxides with γ–Al2O3 coating. The properties and performance were characterized by using the XRD, SEM, BET, and TPD techniques. Mn-Zn oxides catalysts with different kinds of γ–Al2O3 sol coating were found to possess a high activity, and the Mn–Zn/γ–Al2O3/Cord (Mn/Zn=2) was identified as the most active that the temperature of complete combustion of toluene was 250°C. Effects of variation of preparation conditions, including molar ratio of Mn and Zn, loading, calcination temperature and different kinds of γ–Al2O3 dipping were investigated.

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