One‐step Conversion of Fructose to Furfuryl Alcohol in a Continuous Fixed‐bed Reactor: The Important Role of Supports

ChemCatChem ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 2118-2125
Author(s):  
Yueqing Wang ◽  
Xiaohai Yang ◽  
Guoqiang Ding ◽  
Hongyan Zheng ◽  
Xianqing Li ◽  
...  
Keyword(s):  
Furfuryl Alcohol ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
One Step

Role of filter media in an anaerobic fixed-bed reactor

1995 ◽  
Vol 31 (9) ◽  
pp. 137-144 ◽  
Author(s):  
T. Miyahara ◽  
M. Takano ◽  
T. Noike
Keyword(s):  
Anaerobic Bacteria ◽  
Fixed Bed ◽  
Methanogenic Bacteria ◽  
The Other ◽  
Fixed Bed Reactor ◽  
Filter Media ◽  
Fixed Bed Reactors ◽  
Attached Bacteria ◽  
The Relationship

The relationship between the filter media and the behaviour of anaerobic bacteria was studied using anaerobic fixed-bed reactors. At an HRT of 48 hours, the number of suspended acidogenic bacteria was higher than those attached to the filter media. On the other hand, the number of attached methanogenic bacteria was more than ten times as higher than that of suspended ones. The numbers of suspended and deposited acidogenic and methanogenic bacteria in the reactor operated at an HRT of 3 hours were almost the same as those in the reactor operated at an HRT of 48 hours. Accumulation of attached bacteria was promoted by decreasing the HRT of the reactor. The number of acidogenic bacteria in the reactor packed sparsely with the filter media was higher than that in the closely packed reactor. The number of methanogenic bacteria in the sparsely packed reactor was lower than that in the closely packed reactor.

Synthesis of lower olefins from syngas over Zn/Al2O3–SAPO-34 hybrid catalysts: role of doped Zr and influence of the Zn/Al2O3ratio

2018 ◽  
Vol 8 (14) ◽  
pp. 3527-3538 ◽  
Author(s):  
G. Raveendra ◽  
Congming Li ◽  
Bin Liu ◽  
Yang Cheng ◽  
Fanhui Meng ◽  
...  
Keyword(s):  
Direct Synthesis ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Lower Olefins ◽  
Hybrid Catalysts

Hybrid catalysts composed of different loadings of Zr-promoted Zn/Al2O3with SAPO-34 zeolite were investigated for the direct synthesis of lower olefins from syngas in a fixed-bed reactor.

The role of catalyst environment on CO 2 hydrogenation in a fixed-bed reactor

2017 ◽  
Vol 17 ◽  
pp. 1-9 ◽  
Author(s):  
Matthew J. Bradley ◽  
Ramagopal Ananth ◽  
Heather D. Willauer ◽  
Jeffrey W. Baldwin ◽  
Dennis R. Hardy ◽  
...  
Keyword(s):  
Fixed Bed ◽  
Fixed Bed Reactor

scholarly journals Metals on ZrO2: Catalysts for the Aldol Condensation of Methyl Ethyl Ketone (MEK) to C8 Ketones

Catalysts ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 622 ◽  
Author(s):  
Zahraa Al-Auda ◽  
Hayder Al-Atabi ◽  
Keith Hohn
Keyword(s):  
Methyl Ethyl Ketone ◽  
Main Product ◽  
Aldol Condensation ◽  
Fixed Bed ◽  
Hydrogenation Reaction ◽  
Fixed Bed Reactor ◽  
Molar Ratio ◽  
Phase Reaction ◽  
Methyl Ethyl ◽  
One Step

Methyl ethyl ketone (MEK) was converted to heavier ketones in one step, using a multi-functional catalyst having both aldol condensation (aldolization and dehydration) and hydrogenation properties. 15% Cu supported zirconia (ZrO2) was investigated in the catalytic gas phase reaction of MEK in a fixed bed reactor. The results showed that the main product was 5-methyl-3-heptanone (C8 ketone), with side products including 5-methyl-3-heptanol, 2-butanol, and other heavy products (C12 and up). The effects of various reaction parameters, like temperature and molar ratio of reactants (H2/MEK), on the overall product selectivity were studied. It was found that with increasing the temperature of the reaction, the selectivity to the C8 ketone increased, while selectivity to the 2-butanol decreased. Also, hydrogen pressure played a significant role in the selectivity of the products. It was observed that with increasing the H2/MEK molar ratio, the 2-butanol selectivity increased because of the hydrogenation reaction, while decreasing this ratio led to increasing the aldol condensation products. In addition, it was noted that both the conversion and selectivity to the main product increased using a low loading percentage of copper, 1% Cu–ZrO2. The highest selectivity of 5-methyl-3-heptanone reached ~64%, and was obtained at a temperature of around 180 °C and a molar ratio of H2/MEK equal to 2. Other metals (Ni, Pd, and Pt) that were supported on ZrO2 also produced 5-methyl-3-heptanone as the main product, with slight differences in selectivity, suggesting that a hydrogenation catalyst is important for producing the C8 ketone, but that the exact identity of the metal is less important.

Studies on the Role of Nitrogen in the Feed for Fischer-Tropsch Synthesis Under Fixed-Bed Reactor System

2016 ◽  
Vol 16 (2) ◽  
pp. 1894-1897 ◽  
Author(s):  
Gi Hoon Hong ◽  
Jae-Sun Jung ◽  
Na-Young Kim ◽  
Sang Yong Lee ◽  
Dong Ju Moon
Keyword(s):  
Fixed Bed ◽  
Tropsch Synthesis ◽  
Reactor System ◽  
Fixed Bed Reactor ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis

Role of adsorbate interactions in fixed bed reactor design with multicomponent chemisorption

1991 ◽  
Vol 30 (9) ◽  
pp. 2066-2074
Author(s):  
Asha S. Datar ◽  
Sudarshan D. Prasad ◽  
Lakshmangudi K. Doraiswamy
Keyword(s):  
Fixed Bed ◽  
Reactor Design ◽  
Fixed Bed Reactor

Systematic staging design applied to the fixed-bed reactor series for methanol and one-step methanol/dimethyl ether synthesis

2014 ◽  
Vol 70 (2) ◽  
pp. 1228-1237 ◽  
Author(s):  
Flavio Manenti ◽  
Andres R. Leon-Garzon ◽  
Zohreh Ravaghi-Ardebili ◽  
Carlo Pirola
Keyword(s):  
Dimethyl Ether ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Dimethyl Ether Synthesis ◽  
One Step ◽  
Ether Synthesis

Conversion of Xylose to Furfuryl Alcohol and 2-Methylfuran in a Continuous Fixed-Bed Reactor

ChemSusChem ◽  
2016 ◽  
Vol 9 (11) ◽  
pp. 1259-1262 ◽  
Author(s):  
Jinglei Cui ◽  
Jingjing Tan ◽  
Xiaojing Cui ◽  
Yulei Zhu ◽  
Tiansheng Deng ◽  
...  
Keyword(s):  
Furfuryl Alcohol ◽  
Fixed Bed ◽  
Fixed Bed Reactor
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