High pressure plant for heterogeneous catalytic CO2 hydrogenation reactions in a continuous flow microreactor

2013 ◽  
Vol 65 ◽  
pp. 53-57 ◽  
Author(s):  
Bruno Tidona ◽  
Atsushi Urakawa ◽  
Philipp Rudolf von Rohr
Keyword(s):  
High Pressure ◽  
Continuous Flow ◽  
Co2 Hydrogenation ◽  
Heterogeneous Catalytic ◽  
Flow Microreactor ◽  
Hydrogenation Reactions ◽  
Pressure Plant

scholarly journals Hydrogenation of CO2 Promoted by Silicon-Activated H2S: Origin and Implications

Molecules ◽  
2020 ◽  
Vol 26 (1) ◽  
pp. 50
Author(s):  
Xing Liu
Keyword(s):  
Low Temperatures ◽  
Underlying Mechanism ◽  
Reactive Species ◽  
Co2 Hydrogenation ◽  
Usual Method ◽  
Title Reaction ◽  
Hydrogenation Of Co2 ◽  
Hydrogenation Reactions

Unlike the usual method of COx (x = 1, 2) hydrogenation using H2 directly, H2S and HSiSH (silicon-activated H2S) were selected as alternative hydrogen sources in this study for the COx hydrogenation reactions. Our results suggest that it is kinetically infeasible for hydrogen in the form of H2S to transfer to COx at low temperatures. However, when HSiSH is employed instead, the title reaction can be achieved. For this approach, the activation of CO2 is initiated by its interaction with the HSiSH molecule, a reactive species with both a hydridic Hδ− and protonic Hδ+. These active hydrogens are responsible for the successive C-end and O-end activations of CO2 and hence the final product (HCOOH). This finding represents a good example of an indirect hydrogen source used in CO2 hydrogenation through reactivity tuned by silicon incorporation, and thus the underlying mechanism will be valuable for the design of similar reactions.

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