Ethylene selectivity variation in acetylene hydrogenation reactor with the hydrogen/acetylene ratio at the reactor inlet

2002 ◽  
Vol 19 (4) ◽  
pp. 617-621 ◽  
Author(s):  
Woo Jae Kim ◽  
Chang Hun Choi ◽  
Sang Heup Moon
Keyword(s):  
Acetylene Hydrogenation ◽  
Reactor Inlet ◽  
Ethylene Selectivity ◽  
Hydrogenation Reactor

CFD Simulation and Optimization of Gas-Solid Phase Temperature of Isothermal Acetylene Hydrogenation Reactor

2018 ◽  
Vol 16 (5) ◽  
Author(s):  
Guihua Hu ◽  
Zhencheng Ye ◽  
Wenli Du ◽  
Feng Qian
Keyword(s):  
Porous Medium ◽  
Solid Phase ◽  
Inlet Temperature ◽  
Acetylene Hydrogenation ◽  
Simulation And Optimization ◽  
Medium Model ◽  
Hydrogenation Reactor ◽  
Porous Medium Model ◽  
Two Temperature ◽  
Hydrogenation Selectivity

Abstract Gas-solid coupled heat transfer in an industrial isothermal acetylene hydrogenation reactor was carried out using computational fluid dynamics (CFD). A two-temperature porous medium model was established by adding source terms to energy equations of the solid and gas phases. The combination of a genetic algorithm with CFD methods is applied to optimization of the kinetic and process parameters of the reaction. The model was validated by comparing the simulated results with those obtained from a one-temperature porous medium model, a two-temperature porous medium model, and industrial data. The optimal hydrogen-to-acetylene ratio and inlet temperature are 1.78 and 326K, respectively. The optimized ethylene yield increase and hydrogenation selectivity are 0.53 % and 0.18 % higher than the values before optimization, respectively. Finally, the effects of the hydrogen-to-acetylene ratio and inlet temperature on the increase in ethylene yield and hydrogenation selectivity are analyzed. Therefore, the hydrogen-to-acetylene ratio and inlet temperature should be reasonably controlled during production.

Theoretical investigation of conversion between different C2Hx species over Pd–Ag/Pd(100) surface alloys: influence on the selectivity and transformation of carbonaceous species

2018 ◽  
Vol 42 (24) ◽  
pp. 19827-19836 ◽  
Author(s):  
Qiang Li ◽  
Yucai Qin ◽  
Duping Tan ◽  
Yuan Xie ◽  
Manli Lv ◽  
...  
Keyword(s):  
Theoretical Investigation ◽  
Model Catalysts ◽  
Reaction Pathways ◽  
Surface Alloys ◽  
Acetylene Hydrogenation ◽  
Carbonaceous Species ◽  
Ethylene Selectivity

Full reaction pathways for acetylene hydrogenation on model catalysts are important for understanding the influence of ethylene selectivity and the formation of carbonaceous species.

A novel configuration for Pd/Ag/α-Al2O3 catalyst regeneration in the acetylene hydrogenation reactor of a multi feed cracker

2012 ◽  
Vol 198-199 ◽  
pp. 491-502 ◽  
Author(s):  
M.R. Rahimpour ◽  
O. Dehghani ◽  
M.R. Gholipour ◽  
M.S. Shokrollahi Yancheshmeh ◽  
S. Seifzadeh Haghighi ◽  
...  
Keyword(s):  
Catalyst Regeneration ◽  
Acetylene Hydrogenation ◽  
Α Al2o3 ◽  
Hydrogenation Reactor ◽  
Al2o3 Catalyst

Theoretical study on the reaction mechanism and selectivity of acetylene semi-hydrogenation on Ni–Sn intermetallic catalysts

2019 ◽  
Vol 21 (3) ◽  
pp. 1384-1392 ◽  
Author(s):  
De-Ming Rao ◽  
Tao Sun ◽  
Yu-Sen Yang ◽  
Pan Yin ◽  
Min Pu ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Reaction Mechanism ◽  
Density Functional ◽  
Theoretical Study ◽  
Density Functional Theory Study ◽  
Functional Theory ◽  
Acetylene Hydrogenation ◽  
Ethylene Selectivity ◽  
Geometric Effects

A density functional theory study has been carried out to investigate the mechanism of acetylene hydrogenation on six surfaces of Ni–Sn IMCs, and the geometric effects towards ethylene selectivity was revealed.

Control policies for an industrial acetylene hydrogenation reactor

1991 ◽  
Vol 69 (1) ◽  
pp. 152-164 ◽  
Author(s):  
Michael W. Brown ◽  
Alexander Penlidis ◽  
Gerald R. Sullivan
Keyword(s):  
Acetylene Hydrogenation ◽  
Control Policies ◽  
Hydrogenation Reactor

Performance of Si-modified Pd catalyst in acetylene hydrogenation: the origin of the ethylene selectivity improvement

2002 ◽  
Vol 223 (1-2) ◽  
pp. 161-172 ◽  
Author(s):  
Eun Woo Shin ◽  
Jung Hwa Kang ◽  
Woo Jae Kim ◽  
Jae Duk Park ◽  
Sang Heup Moon
Keyword(s):  
Pd Catalyst ◽  
Acetylene Hydrogenation ◽  
Ethylene Selectivity
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