scholarly journals Synthesis and evaluation of highly dispersed SBA-15 supported Ni–Fe bimetallic catalysts for steam reforming of biomass derived tar reaction

2016 ◽  
Vol 6 (12) ◽  
pp. 4327-4336 ◽  
Author(s):  
Y. Kathiraser ◽  
J. Ashok ◽  
S. Kawi
Keyword(s):  
Oleic Acid ◽  
Steam Reforming ◽  
Bimetallic Catalysts ◽  
Incipient Wetness Impregnation ◽  
Impregnation Method ◽  
Metal Precursor ◽  
Highly Dispersed ◽  
Incipient Wetness ◽  
Supported Ni

Highly dispersed Ni–Fe bimetallic catalysts supported on mesoporous SBA-15 were synthesized via an incipient wetness impregnation method by impregnation of a small amount of oleic acid mixed with a metal precursor on the SBA-15 support.

Ethanol Steam Reforming over La2O2CO3 Supported Ni-Ru Bimetallic Catalysts

2012 ◽  
Vol 457-458 ◽  
pp. 314-319 ◽  
Author(s):  
Qiu Jie Shi ◽  
Bin Li ◽  
Wei Qing Chen ◽  
Cheng Wei Liu ◽  
Bi Wu Huang
Keyword(s):  
Steam Reforming ◽  
Atmospheric Pressure ◽  
Bimetallic Catalysts ◽  
Carbon Deposition ◽  
Ni Catalyst ◽  
Ethanol Steam Reforming ◽  
Impregnation Method ◽  
Ethanol Dehydration ◽  
Supported Ni ◽  
Ethanol Steam

A series of Ni-Ru bimetallic catalysts over La2O2CO3 are prepared by an impregnation method. The catalytic properties are evaluated in ethanol steam reforming reaction from 350 to 700 °C under atmospheric pressure. Ni-Ru/La2O2CO3 containing 6 wt% Ni and 3 wt% Ru is found to be more efficient, and Ni-La composite oxide could be formed in the catalyst. Ru is more active in the ethanol dehydration reaction to form ethylene than Ni. The presence of Ru could improve the selectivity for hydrogen of Ni catalyst. TG results reveal that Ni-Ru/La2O2CO3 has excellent resistance to carbon deposition.

scholarly journals Ca-Modified Co/SBA-15 Catalysts for Hydrogen Production through Ethanol Steam Reforming

2013 ◽  
Vol 24 ◽  
pp. 1-16 ◽  
Author(s):  
Chen-Bin Wang ◽  
Siao Wun Liu ◽  
Kuan Fu Ho ◽  
Hsin Hua Huang ◽  
Chih Wei Tang ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Steam Reforming ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Coke Deposition ◽  
Incipient Wetness Impregnation ◽  
Hydrogen Yield ◽  
Impregnation Method ◽  
Steam Reforming Of Ethanol ◽  
Incipient Wetness

Hydrogen production through steam reforming of ethanol (SRE) over the Ca-modified Co/SBA-15 catalysts was studied herein to evaluate the catalytic activity, stability and the behavior of coke deposition. The Ca-modified SBA-15 supports were prepared from the Ca(NO3)2·4H2O (10 wt%) which was incorporated to SBA-15 by incipient wetness impregnation (assigned as Ca/SBA-15) and direct hydrothermal (assigned as Ca-SBA-15) method. The active cobalt species from the Co(NO3)2·6H2O (10 wt%) was loaded to SiO2, SBA-15 and modified-SBA-15 supports with incipient wetness impregnation method to obtain the cobalt catalysts (named as Co/SiO2, Co/SBA-15, Co-Ca/SBA-15 and Co/Ca-SBA-15, respectively). The prepared catalysts were characterized by using X-ray diffraction (XRD), temperature programmed reduction (TPR), transmission electron microscopy (TEM) and BET. The catalytic performance of the SRE reaction was evaluated in a fixed-bed reactor. The results indicated that the Co/Ca-SBA-15 catalyst was preferential among these catalysts and the ethanol can be converted completely at 375 °C. The hydrogen yield (YH2) approached 4.76 at 500 °C and less coke deposited. Further, the long-term stability test of this catalyst approached 100 h at 500 °C and did not deactivate.

Ethanol Steam Reforming over La2O2CO3 Supported Ni-Ru Bimetallic Catalysts

2012 ◽  
Vol 457-458 ◽  
pp. 314-319
Author(s):  
Qiu Jie Shi ◽  
Bin Li ◽  
Wei Qing Chen ◽  
Cheng Wei Liu ◽  
Bi Wu Huang
Keyword(s):  
Steam Reforming ◽  
Bimetallic Catalysts ◽  
Ethanol Steam Reforming ◽  
Supported Ni ◽  
Ethanol Steam

Conversion of Glycerol into Value-Added Products Over Cu–Ni Catalyst Supported on γ-Al2O3 and Activated Carbon

2014 ◽  
Vol 12 (1) ◽  
pp. 151-162 ◽  
Author(s):  
Satyanarayana Murty Pudi ◽  
Tarak Mondal ◽  
Prakash Biswas ◽  
Shalini Biswas ◽  
Shishir Sinha
Keyword(s):  
Activated Carbon ◽  
Mixed Oxide ◽  
Bimetallic Catalysts ◽  
Weight Ratio ◽  
Superior Performance ◽  
Incipient Wetness Impregnation ◽  
Impregnation Method ◽  
Glycerol Conversion ◽  
Glycerol Hydrogenolysis ◽  
Acidic Nature

Abstract A series of Cu, Ni monometallic and bimetallic catalysts supported on γ-Al2O3 and activated carbon were synthesized by incipient wetness impregnation method and examined for hydrogenolysis and esterification of glycerol. Hydrogenolysis reaction was carried out in a 250 ml Teflon-coated stainless steel batch reactor at 250°C and 10 bar H2 pressure, whereas esterification of glycerol with acetic acid was carried out at 120°C at atmospheric pressure. The physiochemical properties of the catalysts were investigated by various techniques such as surface area, X-ray diffraction (XRD), NH3-temperature-programmed desorption (TPD). Characterization results dictated that the reduction behavior, acidic nature and the metal support interactions were varied with the support as well as Cu/Ni weight ratio. The XRD results confirmed the formation of mixed oxide Cu0.75Ni0.25 Al2O4 phase in Cu–Ni (3:1)/γ-Al2O3 catalyst. Among the catalysts tested, Cu–Ni bimetallic catalysts showed superior performance as compared to monometallic catalysts in both the reactions. The glycerol hydrogenolysis activity of γ-Al2O3 supported Cu–Ni catalysts was higher than the activated carbon-supported catalysts. 1,2-PDO was obtained as the main hydrogenolysis product independent of the support as well as Cu/Ni weight ratio and its selectivity was in the range of 92.8–98.5%. The acidic nature of γ-Al2O3 and the mixed oxide (Cu0.75Ni0.25Al2O4) phase played an important role for hydrogenolysis activity. Cu–Ni (3:1)/γ-Al2O3 catalyst showed the maximum 1,2-PDO selectivity to 97% with 27% glycerol conversion after a reaction time of 5 h. On the other hand, Cu–Ni(1:3)/C catalyst showed the highest glycerol conversion of 97.4% for esterification and obtained selectivity to monoacetin, diacetin and triacetin were 26.1%, 67.2% and 6.5%, respectively.

Enhanced Activity of Fe-Doped Cu/H-Sep for the SCR of NO with Propylene in the Presence of Oxygen

2014 ◽  
Vol 700 ◽  
pp. 261-264
Author(s):  
Yang Li ◽  
Qing Ye ◽  
Zhi Hao Zhang ◽  
Yun Fang Qi ◽  
Li Sha Liu
Keyword(s):  
Catalytic Activity ◽  
Incipient Wetness Impregnation ◽  
Impregnation Method ◽  
Copper Species ◽  
Catalytic Activities ◽  
Support Interaction ◽  
Scr Of No ◽  
Metal Support Interaction ◽  
Metal Support ◽  
Incipient Wetness

Cu/H-Sep and Cu-Fe/H-Sep samples were prepared by the incipient wetness impregnation method. These catalysts were characterized by means of XRF, XRD, BET, XPS, and H2-TPR techniques, and their catalytic activities were performed by the SCR of NO with propylene. The results show that the Cu-Fe/H-Sep catalyst exhibited the best performance in the C3H6-SCR of NO. After investigation by H2-TPR, XRD and XPS, the result showed that the higher reducibility, more amount of isolated Cu2+, higher dispersion of copper species, and stronger metal-support interaction were responsible for the excellent catalytic activity of Cu-Fe/H-Sep.

scholarly journals Biogas Reforming over Al-Co Catalyst Prepared by Solution Combustion Synthesis Method

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 274
Author(s):  
Manapkhan Zhumabek ◽  
Galina Xanthopoulou ◽  
Svetlana A. Tungatarova ◽  
Tolkyn S. Baizhumanova ◽  
George Vekinis ◽  
...  
Keyword(s):  
Combustion Synthesis ◽  
Synthesis Gas ◽  
Synthesis Method ◽  
Solution Combustion Synthesis ◽  
Dry Reforming Of Methane ◽  
Incipient Wetness Impregnation ◽  
Impregnation Method ◽  
Solution Combustion ◽  
Preparation Methods ◽  
Incipient Wetness

The results of carbon dioxide reforming of CH4 (model biogas) on catalysts prepared by solution combustion synthesis (SCS) and impregnation of moisture capacity methods are presented. Investigation of the activity of catalysts synthesized from initial mixtures of Co(NO3)2-Al(NO3)3-urea of different compositions was carried out for the production of synthesis-gas, and SCS and traditional incipient wetness impregnation catalyst preparation methods were compared. The methane conversion reached 100%, and the conversion of CO2 increased to 86.2%, while the yield of H2 and CO was 99.2% and 85.4%, respectively, at 900 °C. It was found that CoAl2O4 spinel formation was due to substitution of Al3+ with Co2+ cations. Consequently, CoAl2O4 lattice parameters increased, since the ionic radius of Al3+ (0.51 Å) less than Cο2+ (0.72 Å). Advantages of SCS catalysts in comparison with catalysts prepared by the traditional incipient wetness impregnation method in dry reforming of methane were shown. The aim of this work is to develop a new catalyst for the conversion of model biogas into synthesis gas, which will contribute to the organization of a new environmentally friendly, energy-saving production in the future.

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