Kinetic modeling of the ethylbenzene/xylene isomerization reaction over HZSM‐5 zeolites revisited

2020 ◽  
Vol 52 (6) ◽  
pp. 368-377
Author(s):  
Shokoufeh Hosseinieh Farahani ◽  
Cavus Falamaki ◽  
Seyed Mehdi Alavi
Keyword(s):  
Kinetic Modeling ◽  
Isomerization Reaction ◽  
Xylene Isomerization

scholarly journals Improved performance of HZSM-5 for the ethylbenzene/xylene isomerization reaction under industrial operating conditions

RSC Advances ◽  
2017 ◽  
Vol 7 (54) ◽  
pp. 34012-34022 ◽  
Author(s):  
Shokoufeh Hosseinieh Farahani ◽  
Seyed Mehdi Alavi ◽  
Cavus Falamaki
Keyword(s):  
Operating Conditions ◽  
Isomerization Reaction ◽  
Ethyl Benzene ◽  
Xylene Isomerization ◽  
Para Xylene ◽  
One Step ◽  
Improved Performance

A specific one-step mild dealumination of ZSM-5 is reported that increases significantly para xylene selectivity and ethyl benzene conversion in the xylene isomerization reaction of xylene mixtures/ethyl benzene feeds at industrial conditions.

A kinetic modeling study of ethylene pyrolysis

2000 ◽  
Vol 78 (1) ◽  
pp. 16-25 ◽  
Author(s):  
John M Roscoe ◽  
Alain R Bossard ◽  
Margaret H Back
Keyword(s):  
Activation Energy ◽  
Kinetic Model ◽  
Temperature Dependence ◽  
Key Words ◽  
Kinetic Modeling ◽  
Rate Constants ◽  
Preexponential Factor ◽  
Isomerization Reaction ◽  
Experimental Measurements ◽  
Experimental Conditions

A kinetic model is presented for the pyrolysis of ethylene at pressures ranging from 0.8 to 27 kPa and temperatures from 774 to 1023 K. The model is based on experimental measurements of C2H2, C2H6, C3H6, 1-C4H8, and 1,3-C4H6. In this temperature range the reaction is initiated by the disproportionation of C2H4 and the observed products result from reactions of the C2H3 and C2H5 radicals produced in this process. The C2H2 and 1,3-C4H6 result from reactions of C2H3 while C2H6, C3H6, and 1-C4H8 result from reactions of C2H5. C2H2 is produced exclusively by the decomposition of the C2H3 radical. This process is in its falloff region throughout the range of experimental conditions examined and the yield of C2H2 provides a measure of the degree of falloff. The production of 1,3-C4H6 is controlled by the reaction C4H7 –> C4H6 + H. The rate constants for this reaction were independent of pressure and are given as a function of temperature by k = 2.2 × 1013 exp (-19.6 × 103/T). Production of C2H6 is controlled by the reaction C2H5 + C2H4 –> C2H6 + C2H3. The rate constant for this reaction is given as a function of temperature by k = 5.83 × 1011 exp (-14.6 × 103/T). C3H6 is produced by decomposition of 2-C4H9 and is controlled kinetically by the isomerization reaction 1-C4H9 –> 2-C4H9. The temperature dependence of the rate constants obtained for this reaction leads to a preexponential factor of approximately 3 × 1016 and an activation energy of approximately 200 kJ mol-1. The yield of 1-C4H8 is controlled by 1-C4H9 –> 1-C4H8 + H. The rate constants for this reaction were independent of pressure and are given as a function of temperature by k = 2.97 × 1012 exp (-17.1 × 103/T). Key words: kinetic modeling, ethylene pyrolysis.

Influence of lanthanum concentration on acid and catalytic properties of H-pentasil in the μ-xylene isomerization reaction

2009 ◽  
Vol 82 (5) ◽  
pp. 918-919
Author(s):  
E. I. Akhmedov ◽  
I. A. Aliev ◽  
Kh. M. Azmamedova ◽  
F. Sh. Kerimli ◽  
S. E. Mamedov
Keyword(s):  
Catalytic Properties ◽  
Isomerization Reaction ◽  
Xylene Isomerization

Allene oxidation in jet-stirred reactor : a kinetic modeling study

1990 ◽  
Vol 87 ◽  
pp. 1159-1172 ◽  
Author(s):  
P Dagaut ◽  
M Cathonnet ◽  
B Aboussi ◽  
JC Boettner
Keyword(s):  
Kinetic Modeling ◽  
Stirred Reactor ◽  
Allene Oxidation ◽  
Modeling Study

Estimation and Kinetic Modeling of Human Arm using Wearable Robot Arm

2016 ◽  
Vol 136 (4) ◽  
pp. 254-262 ◽  
Author(s):  
Takahiro Yamazaki ◽  
Sho Sakaino ◽  
Toshiaki Tsuji
Keyword(s):  
Kinetic Modeling ◽  
Robot Arm ◽  
Wearable Robot ◽  
Human Arm
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