Lanthanum‐based catalysts for (bio)ethanol conversion: effect of preparation method on catalytic performance – hard templating versus hydrolysis

2020 ◽  
Author(s):  
Ioannis Valsamakis ◽  
Gabriella Garbarino
Keyword(s):  
Preparation Method ◽  
Catalytic Performance ◽  
Ethanol Conversion ◽  
Hard Templating

The effect of preparation method on the catalytic performance over superior MgO-promoted Ni–Ce0.8Zr0.2O2 catalyst for CO2 reforming of CH4

2013 ◽  
Vol 38 (31) ◽  
pp. 13649-13654 ◽  
Author(s):  
Dae-Woon Jeong ◽  
Won-Jun Jang ◽  
Jae-Oh Shim ◽  
Hyun-Seog Roh ◽  
In Hyuk Son ◽  
...  
Keyword(s):  
Preparation Method ◽  
Catalytic Performance ◽  
Co2 Reforming ◽  
Co2 Reforming Of Ch4

scholarly journals Interconnected Micro, Meso, and Macro Porous Activated Carbon from Bacterial Nanocellulose for Superior Adsorption Properties and Effective Catalytic Performance

Molecules ◽  
2020 ◽  
Vol 25 (18) ◽  
pp. 4063
Author(s):  
Arnon Khamkeaw ◽  
Tatdanai Asavamongkolkul ◽  
Tianpichet Perngyai ◽  
Bunjerd Jongsomjit ◽  
Muenduen Phisalaphong
Keyword(s):  
Activated Carbon ◽  
Reaction Temperature ◽  
Mass Transfer Rate ◽  
Catalyst Support ◽  
Catalytic Performance ◽  
Adsorption Properties ◽  
Bet Surface Area ◽  
Ethanol Conversion ◽  
Bacterial Nanocellulose ◽  
Effective Performance

The porous carbon (bacterial cellulose (BC)-activated carbon (AC)(BA)) prepared via two-step activation of bacterial nanocellulose by treatments with potassium hydroxide (KOH) and then phosphoric acid (H3PO4) solutions showed superior adsorption properties and effective performance as catalyst support. BC-AC(BA) had an open and interconnected multi-porous structure, consisting of micropores (0.23 cm3/g), mesopores (0.26 cm3/g), and macropores (4.40 cm3/g). The BET surface area and porosity were 833 m2/g and 91.2%, respectively. The methylene blue adsorption test demonstrated that BC-AC(BA) was superior in its mass transfer rate and adsorption capacities. Moreover, BC-AC(BA) modified by H3PO4 treatment showed a significant enhancement of catalytic performance for dehydration of ethanol. At the reaction temperature of 250–400 °C, 30P/BC-AC(BA) gave ethanol conversion at 88.4–100%, with ethylene selectivity of 82.6–100%, whereas, high selectivity for diethyl ether (DEE) at 75.2%, at ethanol conversion of 60.1%, was obtained at the reaction temperature of 200 °C.

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 Trimetallic Ni-Based Catalysts over Gadolinia-Doped Ceria for Green Fuel Production

Catalysts ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 435 ◽  
Author(s):  
Patrizia Frontera ◽  
Anastasia Macario ◽  
Angela Malara ◽  
Saveria Santangelo ◽  
Claudia Triolo ◽  
...  
Keyword(s):  
Sulfur Content ◽  
Coke Formation ◽  
Nickel Catalysts ◽  
Catalytic Performance ◽  
Sulfur Poisoning ◽  
Coke Deposition ◽  
Ethanol Conversion ◽  
Doped Ceria ◽  
Spent Catalyst ◽  
High Sulfur Content

The present work concerns the characterization of trimetallic nickel catalysts, NiMoRe (Nickel/Molybdenum/Rhenium), NiMoCu (Nickel/Molybdenum/Copper) and NiMoCo (Nickel/Molybdenum/Cobalt), supported on gadolinia-doped ceria and the evaluation of their catalytic performance in the auto-thermal reforming of ethanol to hydrogen. Catalysts have been prepared by wet impregnation and characterized by XRD, SEM-EDX, TG-DSC, TEM, CHNS, H2-TPR and micro-Raman spectroscopy. The resistance of Ni-alloy catalysts to the carbon deposition and sulfur poisoning has been studied. All catalysts show a similar behavior in the auto-thermal reforming reaction: 100% of ethanol conversion and high selectivity to syngas products, up to 77 vol.%. At 800 °C the coke deposition is very low (less than 0.34 wt%). Sulfur content affects the selectivity and the activity of the catalysts, especially towards the coke formation: high sulfur content promotes the ethylene formation, therefore the amount of coke deposited on spent catalyst increases. NiMoCu seems to be the trimetallic catalyst less sensitive to this aspect.

Effect of Preparation Method on Catalytic Performance of Ag/OMS-2 for the Oxidation of Ethyl Acetate and Formaldehyde

2020 ◽  
Vol 24 (4) ◽  
pp. 259-268
Author(s):  
Ning Dong ◽  
Jiaoli Fu ◽  
Qing Ye ◽  
Mengyue Chen ◽  
Zhidan Fu ◽  
...  
Keyword(s):  
Ethyl Acetate ◽  
Preparation Method ◽  
Catalytic Performance

Effect of preparation method on the surface acidity and catalytic performance of iron orthophosphates in cyclohexene conversion

1995 ◽  
Vol 5 (11) ◽  
pp. 2019 ◽  
Author(s):  
Juan M. Campelo ◽  
Maria S. Climent ◽  
Jose M. Marinas ◽  
Antonio A. Romero ◽  
Jos� A. Navio ◽  
...  
Keyword(s):  
Preparation Method ◽  
Surface Acidity ◽  
Catalytic Performance ◽  
Cyclohexene Conversion
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