Influence of the synergy between reaction, heat exchange and membrane separation on the process intensification of the dimethyl ether direct synthesis from carbon dioxide and hydrogen

2021 ◽  
pp. 108513
Author(s):  
Chakib R. Behloul ◽  
Jean-Marc Commenge ◽  
Christophe Castel
Keyword(s):  
Carbon Dioxide ◽  
Heat Exchange ◽  
Dimethyl Ether ◽  
Membrane Separation ◽  
Direct Synthesis ◽  
Process Intensification ◽  
Reaction Heat

Kinetics of temperature-programmed reactivation of a hydrodesulphurization catalyst

1983 ◽  
Vol 48 (12) ◽  
pp. 3340-3355 ◽  
Author(s):  
Pavel Fott ◽  
Pavel Šebesta
Keyword(s):  
Carbon Dioxide ◽  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Thin Layer ◽  
Kinetic Parameters ◽  
Diffusion Region ◽  
Reaction Heat ◽  
Gaseous Products ◽  
Temperature Programmed ◽  
Kinetics Of

The kinetic parameters of reactivation of a carbonized hydrodesulphurization (HDS) catalyst by air were evaluated from combined thermogravimetric (TG) and differential thermal analysis (DTA) data. In addition, the gaseous products leaving a temperature-programmed reactor with a thin layer of catalyst were analyzed chromatographically. Two exothermic processes were found to take part in the reactivation, and their kinetics were described by 1st order equations. In the first process (180-400 °C), sulphur in Co and Mo sulphides is oxidized to sulphur dioxide; in the second process (300-540 °C), in which the essential portion of heat is produced, the deposited carbon is oxidized to give predominantly carbon dioxide. If the reaction heat is not removed efficiently enough, ignition of the catalyst takes place, which is associated with a transition to the diffusion region. The application of the obtained kinetic parameters to modelling a temperature-programmed reactivation is illustrated on the case of a single particle.

New Direct Synthesis Technology of Dimethyl Ether

2007 ◽  
pp. 137-140 ◽  
Author(s):  
Tsutomu Shikada ◽  
Yasuo Miyoshi ◽  
Yasuhiro Mogi ◽  
Norio Inoue ◽  
Yotaro Ohno
Keyword(s):  
Dimethyl Ether ◽  
Direct Synthesis

Zeolite membrane reactors: from preparation to application in heterogeneous catalytic reactions

2021 ◽  
Author(s):  
I. G. Wenten ◽  
K. Khoiruddin ◽  
R. R. Mukti ◽  
W. Rahmah ◽  
Z. Wang ◽  
...  
Keyword(s):  
Chemical Reaction ◽  
Membrane Reactor ◽  
Membrane Separation ◽  
Process Intensification ◽  
Catalytic Reactions ◽  
Membrane Reactors ◽  
Zeolite Membrane ◽  
Heterogeneous Catalytic

Coupling chemical reaction with membrane separation or known as membrane reactor (MR) has been demonstrated by numerous studies and showed that this strategy has successfully addressed the goal of process intensification.

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