scholarly journals PREPARATION, CHARACTERIZATION AND CATALYTIC ACTIVITY TEST OF CoMo/ZnO CATALYST ON ETHANOL CONVERSION USING STEAM REFORMING METHOD

2010 ◽  
Vol 9 (2) ◽  
pp. 195-200
Author(s):  
Wega Trisunaryanti ◽  
Handirofa Handirofa ◽  
Triyono Triyono ◽  
Suryo Purwono
Keyword(s):  
Catalytic Activity ◽  
Steam Reforming ◽  
Flow Reactor ◽  
Gravimetric Method ◽  
Coke Production ◽  
Ethanol Conversion ◽  
Activity Test ◽  
Steam Reforming Of Ethanol ◽  
Mo Content ◽  
Catalytic Activity Test

Preparation, characterization and catalytic activity test of CoMo/ZnO catalyst for steam reforming of ethanol have been investigated. The catalysts preparation was carried out by impregnation of Co and/or Mo onto ZnO sample. Water excess was used in ethanol feed for steam reforming process under mol ratio of ethanol:water (1:10). Characterizations of catalysts were conducted by analysis of metal content using Atomic Absorption Spectroscopy (AAS). Determination of catalysts acidity was conducted by gravimetric method of adsorption of pyridine base. Catalytic activity test on ethanol conversion using steam reforming method was conducted in a semi-flow reactor system, at a temperature of 400 oC, for 1.5 h under N2 flow rate of 10 mL/min. Gas product was analyzed by gas chromatograph with TCD system. The results of catalysts characterizations showed that the impregnation of Co and/or Mo metals on ZnO sample increased its acidity and specific surface area. The content of Co in Co/ZnO and CoMo/ZnO catalysts was 1.14 and 0.49 wt%. The Mo content in CoMo/ZnO catalyst was 0.36 wt%. The catalytic activity test result on ethanol conversion showed that the ZnO, Co/ZnO, and CoMo/ZnO catalysts produced gas fraction of 16.73, 28.53, and 35.53 wt%, respectively. The coke production of ZnO, Co/ZnO, and CoMo/ZnO catalysts was 0.86, 0.24, and 0.08 wt%, respectively. The gas products consisted mainly of hydrogen.   Keywords: CoMo/ZnO catalyst, steam reforming, ethanol

scholarly journals Steam reforming of ethanol for hydrogen production: influence of catalyst composition (Ni/Al2O3, Ni/Al2O3–CeO2, Ni/Al2O3–ZnO) and process conditions

2021 ◽  
Vol 132 (2) ◽  
pp. 907-919
Author(s):  
O. Shtyka ◽  
Z. Dimitrova ◽  
R. Ciesielski ◽  
A. Kedziora ◽  
G. Mitukiewicz ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Steam Reforming ◽  
Catalyst Stability ◽  
Feed Ratio ◽  
Ethanol Conversion ◽  
Process Conditions ◽  
Catalyst Activation ◽  
Catalyst Composition ◽  
Activity Measurements ◽  
Steam Reforming Of Ethanol

AbstractEthanol steam reforming was studied over Ni supported catalysts. The effects of support (Al2O3, Al2O3–ZnO, and Al2O3–CeO2), metal loading, catalyst activation method, and steam-to-ethanol molar feed ratio were investigated. The properties of catalysts were studied by N2 physisorption, TPD-CO2, X-ray diffraction, and temperature programmed reduction. After activity tests, the catalysts were analyzed by TOC analysis. The catalytic activity measurements showed that the addition either of ZnO SSor CeO2 to alumina enhances both ethanol conversion and promotes selectivity towards hydrogen formation. The same effects were observed for catalysts with higher metal loadings. High process temperature and high water-to-ethanol ratio were found to be beneficial for hydrogen production. An extended catalyst stability tests showed no loss of activity over 50 h on reaction stream. The TOC analysis of spent catalysts revealed only insignificant amounts of carbon deposit.

scholarly journals CATALYTIC ACTIVITY TEST OF NiMo AND MoNi IMPREGNATED ON MESOPOROUS CARBON FROM BOVINE BONE GELATIN FOR HYDROCRACKING OF LUBRICANT WASTE

2018 ◽  
Vol 11 (4) ◽  
pp. 1433-1440 ◽  
Author(s):  
Farin Windy Artanti ◽  
Wega Trisunaryanti ◽  
Marthinus Pongsendana ◽  
Triyono ◽  
Iip Izul Falah ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Mesoporous Carbon ◽  
Bovine Bone ◽  
Activity Test ◽  
Catalytic Activity Test

scholarly journals Sustainable Production of Hydrogen by Steam Reforming of Ethanol Using Cobalt Supported on Nanoporous Zeolitic Material

Nanomaterials ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1934
Author(s):  
Javier Francisco da Costa-Serra ◽  
Maria Teresa Navarro ◽  
Fernando Rey ◽  
Antonio Chica
Keyword(s):  
Steam Reforming ◽  
Zeolite Y ◽  
Cobalt Catalysts ◽  
Coke Deposition ◽  
Bet Surface Area ◽  
Ethanol Conversion ◽  
Y Zeolite ◽  
Steam Reforming Of Ethanol ◽  
Production Of Hydrogen ◽  
Hydrogen Selectivity

Cobalt catalysts supported on Y zeolite and mesoporized Y zeolite (Y-mod) have been studied in steam reforming of ethanol (SRE). Specifically, the effect of the mesoporosity and the acidity of the y zeolite as a support has been explored. Mesoporous were generated on Y zeolite by treatment with NH4F and the acidity was neutralized by Na incorporation. Four cobalt catalysts supported on Y zeolite have been prepared, two using Y zeolite without mesoporous (Co/Y, Co/Y-Na), and two using Y zeolite with mesoporous (Co/Y-mod and Co/Y-mod-Na). All catalysts showed a high activity, with ethanol conversion values close to 100%. The main differences were found in the distribution of the reaction products. Co/Y and Co/Y-mod catalysts showed high selectivity to ethylene and low hydrogen production, which was explained by their high acidity. On the contrary, neutralization of the acid sites could explain the higher hydrogen selectivity and the lower ethylene yields exhibited by the Co/Y-Na and Co/Y-mod-Na. In addition, the physicochemical characterization of these catalysts by XRD, BET surface area, temperature-programmed reduction (TPR), and TEM allowed to connect the presence of mesoporous with the formation of metallic cobalt particles with small size, high dispersion, and with high interaction with the zeolitic support, explaining the high reforming activity exhibited by the co/y-mod-Na sample as well as its higher hydrogen selectivity. It has been also observed that the formation of coke is affected by the presence of mesoporous and acidity. Both properties seem to have an opposite effect on the reforming catalyst, decreasing and increasing the coke deposition, respectively.

Steam reforming of ethanol–phenol mixture on Ni/Al2O3: Effect of magnesium and boron on catalytic activity in the presence and absence of sulphur

2014 ◽  
Vol 147 ◽  
pp. 813-826 ◽  
Author(s):  
Gabriella Garbarino ◽  
Elisabetta Finocchio ◽  
Alberto Lagazzo ◽  
Ioannis Valsamakis ◽  
Paola Riani ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Steam Reforming ◽  
Steam Reforming Of Ethanol ◽  
Presence And Absence

scholarly journals PREPARATION, CHARACTERIZATION, AND CATALYTIC ACTIVITY TEST OF Ni-Mo/NATURAL ZEOLITE ON PYRIDINE HYDRODENITROGENATION

2010 ◽  
Vol 10 (3) ◽  
pp. 327-333 ◽  
Author(s):  
Sri Kadarwati ◽  
Sri Wahyuni ◽  
Wega Trisunaryanti ◽  
Triyono Triyono
Keyword(s):  
Catalytic Activity ◽  
Flow Rate ◽  
Natural Zeolite ◽  
Diffraction Method ◽  
Nitrate Hexahydrate ◽  
Impregnation Method ◽  
Hydrogen Flow Rate ◽  
Hydrogen Flow ◽  
Activity Test ◽  
Catalytic Activity Test

Preparation, characterization, and catalytic activity test of Ni-Mo/natural zeolite on pyridine hydrodenitrogenation were carried out. Preparation of catalyst was conducted by impregnation method using nickel nitrate hexahydrate and ammonium heptamolibdate precursor as Ni and Mo source respectively. Characterization of catalyst was conducted by using gravimetry, atomic absorption spectrophotometry, and X-ray diffraction method. Catalytic activity test on pyridine hydrodenitrogenation was carried out by using flow system reactor with hydrogen flow rate variable. The research results showed that the catalyst's total acidity and crystallinity are increased with level of impregnation success of 96.71% and 90.08% respectively. Ni-Mo/natural zeolites able to increase the catalytic conversion up to 71.78% at 350 °C and hydrogen flow rate of 10 mL/min with more highly varied product distribution. Assuming that the pyridine hydrodenitrogenation follows the pseudo first order kinetics.

Steam Reforming of Ethanol by a Nickel Nanowire Catalyst

2014 ◽  
Vol 651-653 ◽  
pp. 92-102 ◽  
Author(s):  
Xue Bin Hong
Keyword(s):  
Steam Reforming ◽  
Physical Adsorption ◽  
High Specific Surface Area ◽  
Ni Catalyst ◽  
Ethanol Conversion ◽  
Hydrogen Yield ◽  
Templating Method ◽  
X Ray ◽  
Steam Reforming Of Ethanol ◽  
Nickel Nanowire

A nickel nanowire catalyst was prepared by a hard templating method, and characterized by transmission electron microscopy (TEM), N2 physical adsorption, X-ray photoelectron spectrometry (XPS), X-ray diffraction (XRD) and H2 temperature-programmed reduction (H2-TPR). The catalytic properties of the nanowire catalyst in the ethanol steam reforming were compared with a metallic Ni catalyst which was prepared with nickel sponge. The characterization results showed that the nickel nanowire catalyst had high specific surface area and there was more NiO phase in the nickel nanowire catalyst than in the metallic Ni catalyst. The reaction results showed that the nickel nanowire catalyst had higher ethanol conversion and hydrogen yield than the metallic Ni catalyst.

Steam-reforming of ethanol for hydrogen production

2011 ◽  
Vol 65 (3) ◽  
Author(s):  
Ahmed Bshish ◽  
Zahira Yaakob ◽  
Binitha Narayanan ◽  
Resmi Ramakrishnan ◽  
Ali Ebshish
Keyword(s):  
Hydrogen Production ◽  
Steam Reforming ◽  
Molar Ratio ◽  
Ethanol Conversion ◽  
Impregnation Method ◽  
Reaction Conditions ◽  
Oxide Supports ◽  
Steam Reforming Of Ethanol ◽  
Production Of Hydrogen ◽  
Hydrogen Selectivity

AbstractProduction of hydrogen by steam-reforming of ethanol has been performed using different catalytic systems. The present review focuses on various catalyst systems used for this purpose. The activity of catalysts depends on several factors such as the nature of the active metal catalyst and the catalyst support, the precursor used, the method adopted for catalyst preparation, and the presence of promoters as well as reaction conditions like the water-to-ethanol molar ratio, temperature, and space velocity. Among the active metals used to date for hydrogen production from ethanol, promoted-Ni is found to be a suitable choice in terms of the activity of the resulting catalyst. Cu is the most commonly used promoter with nickel-based catalysts to overcome the inactivity of nickel in the water-gas shift reaction. γ-Al2O3 support has been preferred by many researchers because of its ability to withstand reaction conditions. However, γ-Al2O3, being acidic, possesses the disadvantage of favouring ethanol dehydration to ethylene which is considered to be a source of carbon deposit found on the catalyst. To overcome this difficulty and to obtain the long-term catalyst stability, basic oxide supports such as CeO2, MgO, La2O3, etc. are mixed with alumina which neutralises the acidic sites. Most of the catalysts which can provide higher ethanol conversion and hydrogen selectivity were prepared by a combination of impregnation method and sol-gel method. High temperature and high water-to-ethanol molar ratio are two important factors in increasing the ethanol conversion and hydrogen selectivity, whereas an increase in pressure can adversely affect hydrogen production.

Anisotropic nanoporous morphology of ZnO-supported Co that enhances catalytic activity

Nanoscale ◽  
2021 ◽  
Author(s):  
Christopher M. Coaty ◽  
Adam A. Corrao ◽  
Victoria Petrova ◽  
Taewoo Kim ◽  
David P. Fenning ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Catalytic Activity ◽  
Steam Reforming ◽  
Synthesis Methods ◽  
Reaction Synthesis ◽  
Co Catalyst ◽  
Conversion Reaction ◽  
Anisotropic Crystal ◽  
Highly Efficient ◽  
Steam Reforming Of Ethanol

Conversion reaction synthesis methods yield a nanoporous ZnO-supported Co catalyst with an anisotropic crystal structure and an anisotropic, hierarchical, columnar wall morphology that is highly efficient for steam reforming of ethanol to produce H2.

scholarly journals Comparative Study of Ni-W /CeO2, Ni-W /y-Al2O3 and Ni-W /HT Catalysts for H2 Production by Steam Reforming of Bioethanol

Quimica Hoy ◽  
2011 ◽  
Vol 2 (1) ◽  
pp. 3
Author(s):  
Paz Hernández ◽  
Arturo Fernández ◽  
Sarah Messina
Keyword(s):  
Catalytic Activity ◽  
Fuel Cell ◽  
Hydrogen Production ◽  
Comparative Study ◽  
Steam Reforming ◽  
Carbon Deposition ◽  
Nickel Content ◽  
H2 Production ◽  
Good Stability ◽  
Steam Reforming Of Ethanol

Ni-W catalysts supported on CeO2,Al2O3 and hydrotalcite (HT) were studied in the steam reforming of ethanol at 500-650ºC. The CeO2 and HT were synthesized by impregnation and direct coprecipitation methods, respectively. Commercial Al2O3 was used. Nickel content was varied from 10, 15 and 30% with 1% W. The catalyst that presented the highest catalytic activity and selectivity to hydrogen was 10% Ni-W/HT. Conversion to ethanol was 100% and selectivities to H2, CH4, CO2 and CO were 75, 5.78, 0.37 and 18.85%, respectively, at a temperature of 500 ºC. Moreover, these catalysts showed good stability with respect to carbon deposition and low selectivity towards C2H4 production. These are desirable features for catalysts to be used in hydrogen production for fuel cell applications.

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