Oxygen-containing coke species in zeolite-catalyzed conversion of methanol to hydrocarbons

2016 ◽  
Vol 6 (22) ◽  
pp. 8157-8165 ◽  
Author(s):  
Zhaohui Liu ◽  
Xinglong Dong ◽  
Xin Liu ◽  
Yu Han
Keyword(s):  
Methanol To Hydrocarbons ◽  
Deactivation Of Catalyst

Oxygen-containing coke species are identified during methanol-to-hydrocarbons reactions, and their influence on the deactivation of catalyst is investigated.

Transformation of methanol to hydrocarbons over Y zeolites with varying Si/Al ratio

1987 ◽  
Vol 52 (7) ◽  
pp. 1701-1707 ◽  
Author(s):  
Miloslav Křivánek ◽  
Nguyen Thiet Dung ◽  
Pavel Jírů
Keyword(s):  
Catalytic Activity ◽  
Reaction Time ◽  
Coke Formation ◽  
Aliphatic Hydrocarbons ◽  
Y Zeolite ◽  
Y Zeolites ◽  
Methanol To Hydrocarbons

The catalytic activity of Na, H-Y zeolite samples with a varying Si/Al ratio (2·5 to 20) in the transformation of methanol was determined. The amounts of formed individual aliphatic hydrocarbons as function of reaction time were correlated with the amount of Bronsted and Lewis centres on the catalysts. The effect of coke formation on the over-all course of the reaction has been demonstrated.

scholarly journals Study of deactivation in mesocellular foam carbon (MCF-C) catalyst used in gas-phase dehydrogenation of ethanol

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yoottapong Klinthongchai ◽  
Seeroong Prichanont ◽  
Piyasan Praserthdam ◽  
Bunjerd Jongsomjit
Keyword(s):  
Catalytic Activity ◽  
Pore Size ◽  
Gas Phase ◽  
Surface Area ◽  
Active Sites ◽  
Operating Temperature ◽  
Coke Formation ◽  
Ethanol Conversion ◽  
Deactivation Of Catalyst ◽  
Dehydrogenation Of Ethanol

AbstractMesocellular foam carbon (MCF-C) is one the captivating materials for using in gas phase dehydrogenation of ethanol. Extraordinary, enlarge pore size, high surface area, high acidity, and spherical shape with interconnected pore for high diffusion. In contrary, the occurrence of the coke is a majority causes for inhibiting the active sites on catalyst surface. Thus, this study aims to investigate the occurrence of the coke to optimize the higher catalytic activity, and also to avoid the coke formation. The MCF-C was synthesized and investigated using various techniques. MCF-C was spent in gas-phase dehydrogenation of ethanol under mild conditions. The deactivation of catalyst was investigated toward different conditions. Effects of reaction condition including different reaction temperatures of 300, 350, and 400 °C on the deactivation behaviors were determined. The results indicated that the operating temperature at 400 °C significantly retained the lowest change of ethanol conversion, which favored in the higher temperature. After running reaction, the physical properties as pore size, surface area, and pore volume of spent catalysts were decreased owing to the coke formation, which possibly blocked the pore that directly affected to the difficult diffusion of reactant and caused to be lower in catalytic activity. Furthermore, a slight decrease in either acidity or basicity was observed owing to consumption of reactant at surface of catalyst or chemical change on surface caused by coke formation. Therefore, it can remarkably choose the suitable operating temperature to avoid deactivation of catalyst, and then optimize the ethanol conversion or yield of acetaldehyde.

Comments on the effect of the acidic strength of silica—alumina in the conversion of methanol to hydrocarbons

1986 ◽  
Vol 27 (2) ◽  
pp. 393-396
Author(s):  
W.G.B. Mandersloot ◽  
C.P. Nicolaides ◽  
M.S. Scurrell
Keyword(s):  
Methanol To Hydrocarbons ◽  
Silica Alumina

Direct Mechanism of the First Carbon-Carbon Bond Formation in the Methanol-to-Hydrocarbons Process

2017 ◽  
Vol 129 (31) ◽  
pp. 9167-9171 ◽  
Author(s):  
Xinqiang Wu ◽  
Shutao Xu ◽  
Wenna Zhang ◽  
Jindou Huang ◽  
Jinzhe Li ◽  
...  
Keyword(s):  
Bond Formation ◽  
Carbon Bond ◽  
Direct Mechanism ◽  
Methanol To Hydrocarbons ◽  
Carbon Carbon Bond

Methanol to hydrocarbons over zeolites with MWW topology: Effect of zeolite texture and acidity

2011 ◽  
Vol 402 (1-2) ◽  
pp. 208-217 ◽  
Author(s):  
Antoine Lacarriere ◽  
Francis Luck ◽  
Dariusz Świerczyński ◽  
François Fajula ◽  
Vasile Hulea
Keyword(s):  
Methanol To Hydrocarbons

scholarly journals Shape Selectivity in the Conversion of Methanol to Hydrocarbons: The Catalytic Performance of One-Dimensional 10-Ring Zeolites: ZSM-22, ZSM-23, ZSM-48, and EU-1

ACS Catalysis ◽  
2011 ◽  
Vol 2 (1) ◽  
pp. 26-37 ◽  
Author(s):  
Shewangizaw Teketel ◽  
Wegard Skistad ◽  
Sandrine Benard ◽  
Unni Olsbye ◽  
Karl Petter Lillerud ◽  
...  
Keyword(s):  
Shape Selectivity ◽  
Catalytic Performance ◽  
One Dimensional ◽  
Methanol To Hydrocarbons

Hydrogen transfer versus olefins methylation: On the formation trend of propene in the methanol-to-hydrocarbons reaction over Beta zeolites

2018 ◽  
Vol 368 ◽  
pp. 248-260 ◽  
Author(s):  
Jie Zhang ◽  
Lanjian Xu ◽  
Yanfei Zhang ◽  
Zhihua Huang ◽  
Xiaomin Zhang ◽  
...  
Keyword(s):  
Hydrogen Transfer ◽  
Methanol To Hydrocarbons ◽  
Beta Zeolites
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