The Performance of the Cu-Zn/CeO2 Catalysts in the Steam Reforming of Methanol Reaction

2011 ◽  
Vol 324 ◽  
pp. 157-161 ◽  
Author(s):  
Mary Mrad ◽  
Cédric Gennequin ◽  
Antoine Aboukaïs ◽  
Edmond Abi-Aad
Keyword(s):  
Catalytic Activity ◽  
Steam Reforming ◽  
Conversion Rate ◽  
Methanol Conversion ◽  
Impregnation Method ◽  
Copper Species ◽  
Steam Reforming Of Methanol ◽  
Optimum Content

The performances of different xCu10Ce and xZn10Ce (x = 1, 3, and 5) catalysts prepared by impregnation method then pelletised, were investigated in the steam reforming of methanol (SRM) under a GHSV = 15500 h-1 with H2O/CH3OH = 2. The impregnation of copper over ceria supports shows better results than that of zinc. The catalytic activity in the Cu-based depends on the dispersion of the copper species. The methanol conversion rate is related to the formation of an optimum content of reduced copper species.

Hydrogen Production by Steam Reforming of Methanol over New Ag-Au(1-D)-CeO2 Catalyst

2010 ◽  
Vol 1279 ◽  
Author(s):  
R. Pérez-Hernández ◽  
A. Gutiérrez-Martínez ◽  
C. Gutiérrez-Wing
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Production ◽  
Steam Reforming ◽  
Active Phase ◽  
Methanol Conversion ◽  
Metallic Nanostructures ◽  
Precipitation Method ◽  
Steam Reforming Of Methanol ◽  
Au Nanowires

AbstractA Ag-Au(1-D)-CeO2 catalyst was prepared by precipitation method using Ag-Au nanowires and Ce(NO3)3·6H2O as precursors. The catalytic activity of the catalysts was evaluated in a steam reforming of methanol (SRM) reaction from 250 to 475 °C. 100 % of methanol conversion was observed at 450 °C together with high H2 selectivity. This study evidenced that the use of 1-D metallic nanostructures could be used as an active phase on a CeO2 matrix for steam reforming of methanol for H2 generation to be used as fuel.

Production of Hydrogen With Low Carbon Monoxide Formation Via Catalytic Steam Reforming of Methanol

2005 ◽  
Author(s):  
Sanjay Patel ◽  
K. K. Pant
Keyword(s):  
Carbon Monoxide ◽  
Steam Reforming ◽  
Methanol Conversion ◽  
Operating Conditions ◽  
Molar Ratio ◽  
Optimum Operating ◽  
Impregnation Method ◽  
Steam Reforming Of Methanol ◽  
Production Of Hydrogen ◽  
Carbon Monoxide Formation

The production of hydrogen was investigated in a fixed bed tubular reactor via steam reforming of methanol using CuO/ZnO/Al2O3 catalysts prepared by wet impregnation method and characterized by measuring surface area, pore volume, X-ray diffraction pattern and scanning electron microscopy photographs. The SRM was carried out at atmospheric pressure, temperature 493–573 K, steam to methanol molar ratio 1–1.8 and W/F 3 to 15. Effects of reaction temperature, contact-time, steam to methanol molar ratio and zinc content of catalyst on methanol conversion, selectivity and product yields were evaluated. The addition of zinc enhances the methanol conversion and hydrogen production. The excess steam promotes the methanol conversion and suppresses the carbon monoxide formation. Different strategies have been mentioned to minimize the carbon monoxide formation for the steam reforming of methanol to produce fuel cell grade hydrogen. Optimum operating conditions with appropriate composition of catalyst has been found to produce more selective hydrogen with minimum carbon monoxide. The reaction mechanism has been proposed based on the product distribution. The kinetic model available in literature fitted well with the experimental results.

Hydrogen Production by Steam Reforming of Methanol over a Ag/ZnO One Dimensional Catalyst

2010 ◽  
Vol 132 ◽  
pp. 205-219 ◽  
Author(s):  
Raul Pérez-Hernández ◽  
A. Gutiérrez-Martínez ◽  
Alvaro Mayoral ◽  
F. Leonard Deepak ◽  
Ma. E. Fernández-García ◽  
...  
Keyword(s):  
Particle Size ◽  
Catalytic Activity ◽  
Steam Reforming ◽  
Three Dimensional ◽  
Methanol Conversion ◽  
H2 Production ◽  
One Dimensional ◽  
Steam Reforming Of Methanol ◽  
Ag Particle

One dimensional (1-D) and three dimensional (3-D) ZnO were growth by a hydrothermal method. ZnO 1-D was employed as a support for silver nanoparticles in order to design a new catalyst and used on the steam reforming of methanol (SRM) reaction for H2 production. The catalytic activity of the Ag/ZnO sample with low content of Ag showed better performance on the SRM reaction than on high silver loading catalyst. So, the sample with small Ag particle size showed best performance in methanol conversion than catalyst with big Ag particle size, this finding could be attributed to the high ZnO/Ag ratio. According to results of SEM and TEM techniques the catalytic activity: methanol conversion, H2 and low CO production observed on the Ag/ZnO 1-D catalyst occurs in the edge sites rather than the rim sites. The role of Ag is to accept the hydrogen to be released to the gas phase. In addition, the 1.5Ag/ZnO 1-D catalyst showed good stability during the reaction.

Reduction of Pd/ZnO Catalyst and Its Catalytic Activity for Steam Reforming of Methanol

2007 ◽  
Vol 28 (3) ◽  
pp. 234-238 ◽  
Author(s):  
Yanhua WANG ◽  
Jingchang ZHANG ◽  
Hengyong XU ◽  
Xuefeng Bai
Keyword(s):  
Catalytic Activity ◽  
Steam Reforming ◽  
Steam Reforming Of Methanol

Catalytic Activity and Stability of Nickel-Modified Molybdenum Carbide Catalysts for Steam Reforming of Methanol

2014 ◽  
Vol 118 (18) ◽  
pp. 9485-9496 ◽  
Author(s):  
Yufei Ma ◽  
Guoqing Guan ◽  
Patchiya Phanthong ◽  
Xiaogang Hao ◽  
Wei Huang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Steam Reforming ◽  
Molybdenum Carbide ◽  
Steam Reforming Of Methanol

Catalytic Activity of Dehydrogenation of Methanol to MF over Cu/MCM-41 and Cu-ZnO/MCM-41 Prepared by Impregnation and Grinding

2011 ◽  
Vol 396-398 ◽  
pp. 730-733
Author(s):  
Guo Ru Li ◽  
Gong Li ◽  
Shu Xi Zhou ◽  
Hui Juan Tong
Keyword(s):  
Catalytic Activity ◽  
Atmospheric Pressure ◽  
Molecular Sieves ◽  
Conversion Rate ◽  
Methyl Formate ◽  
Methanol Conversion ◽  
N2 Adsorption ◽  
Flow Microreactor ◽  
Adsorption Desorption ◽  
Mcm 41

Abstract. Using MCM-41 molecular sieves as the support, Cu-ZnO/MCM-41 and Cu/MCM-41 catalysts were prepared by impregnation and grinding. The catalysts were characterized by XRD, N2 adsorption-desorption and TPR methods. The catalytic activity of the dehydrogenation of methanol to methyl formate (MF) was evaluated using the flow microreactor under atmospheric pressure. According to the results, the catalyst prepared by impregnation had a better selectivity for the MF, but a lower methanol conversion rate. However, the product's selectivity could be improved by adding ZnO additive while the methanol conversion rate was reduced. For Cu/MCM-41 prepared by impregnation and grinding, the methanol conversion rate was 20.18% and 24.13% respectively at 250°C and the MF selectivity was 73.75% and 67.35% respectively. Likewise for Cu-ZnO/MCM-41 prepared by impregnation and grinding, the methanol conversion rate was 15.28% and 18.83% respectively at 250°C and the MF selectivity was 81.31% and 75.32% respectively.

Preparation of Cu/ZnO for Fabrication of a Micro Methanol Reformer

2007 ◽  
Vol 119 ◽  
pp. 235-238
Author(s):  
Hong Seock Cha ◽  
Tae Gyu Kim ◽  
Se Jin Kwon
Keyword(s):  
Steam Reforming ◽  
Methanol Conversion ◽  
Catalyst Loading ◽  
Fabrication Method ◽  
Micro Structure ◽  
Micro Fabrication ◽  
Steam Reformer ◽  
Steam Reforming Of Methanol ◽  
Strong Adhesion ◽  
Micro Reactor

Three synthesis procedures of Cu/ZnO catalyst for steam reforming of methanol were tested for loading in a micro reactor. The best procedure that resulted in the strong adhesion to the wafer was determined out of the tested procedures. The molecular structure of the synthesized catalyst was examined by XRD and its performance in methanol conversion was measured. A micro fabrication method that incorporates the catalyst loading and micro structure processing was developed. A MEMS methanol steam reformer was built by this process and the completed device resulted in methanol conversion of 93%.

Study on the Cu-Ni/Y2O3-ZrO2 Catalytic Performance in Ethanol Steam Reforming

2012 ◽  
Vol 512-515 ◽  
pp. 2257-2261 ◽  
Author(s):  
Hong Da Wu ◽  
Ying Gui Jia ◽  
Yu Yin ◽  
Lue Zhao
Keyword(s):  
Steam Reforming ◽  
Conversion Rate ◽  
Carbon Deposition ◽  
Catalytic Performance ◽  
Precipitation Method ◽  
Ethanol Conversion ◽  
Ethanol Steam Reforming ◽  
Impregnation Method ◽  
Catalyst Composition ◽  
Ethanol Steam

Y2O3-ZrO2 support was prepared by two-step precipitation method with ammonia and oxalic acid. A series of Cu-Ni/Y2O3-ZrO2 catalysts were prepared by impregnation method. The catalysts were investigated and then characterized by XRD and SEM results. The activity of catalysts in ethanol steam reforming was studied. The effects of the catalyst composition on the ethanol conversion rate were discussed and the catalysts inactivation phenomenon under the temperature ranging from 673K to 723K was then analyzed. The results show that 1Cu9Ni/1Y9Zr catalyst has higher activity in ethanol steam reforming, over which ethanol conversion rate is higher than 98% under the situation of 623K, while the inactivation of catalysts with Cu/Ni>3/7 at 673K~723K was caused by carbon deposition .

scholarly journals The influence of the size of metal particles on the catalytic activity of Ni and Cu-supported catalysts in methanol reforming reaction

2019 ◽  
Vol 129 (1) ◽  
pp. 219-233
Author(s):  
Oleksandr Shtyka ◽  
Radoslaw Ciesielski ◽  
Evgeny Kitsyuk ◽  
Andrey Savitsky ◽  
Tomasz Maniecki
Keyword(s):  
Carbon Nanotubes ◽  
Catalytic Activity ◽  
Metal Nanoparticles ◽  
Steam Reforming ◽  
Supported Catalysts ◽  
Metal Particles ◽  
Methanol Reforming ◽  
Steam Reforming Of Methanol ◽  
Supported Nanoparticles

Abstract The aim of the work was to investigate how the size of Ni and Cu-supported nanoparticles influence their activity in an oxidative steam reforming of methanol. The size of metal particles was controlled by the initial introduction or elimination of oxygen-containing groups on the surface of carbon nanotubes. The results of the activity tests showed that catalysts with the smallest metal nanoparticles were the least active since they easily underwent oxidation during the process.

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