The effect of CO2 addition on C2H6 dehydrogenation reaction under plasma plasma conditions

• Categories:Company Dynamics
• Author:Plasma cleaning machine-CRF plasma plasma equipment-plasma surface treatment machine manufacturer-chengfeng intelligent manufacturing
• Origin:
• Time of issue:2022-01-25
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(Summary description)The effect of CO2 addition on C2H6 dehydrogenation reaction under plasma plasma conditions: Influence of CO2 addition on C2H6 dehydrogenation under the plasma energy density of 800 kJ/mol: Compared with pure C2H6 dehydrogenation under plasma conditions, with the increase of CO2 addition in the system, the conversion of C2H6 Increase. This is due to the fact that under plasma plasma conditions, CO2 can undergo a splitting reaction with the high-energy electrons generated by the plasma: CO2+e*→CO+O, generating reactive oxygen species. The higher the CO2 concentration, the more reactive oxygen species in the system, and the C-H bond and C-C bond of C2H6 are easier to break under the action of reactive oxygen species. Therefore, the conversion of C2H6 increases with the increase of CO2 concentration. The yields of C2H2 and C2H4 show a peak shape change with the increase of the amount of CO2 added. Low CO2 concentration promotes the formation of C2H2 and C2H4, while high CO2 concentration leads to an increase in the number of reactive oxygen species, which promotes the complete breakage of the CH bond and CC bond of C2H6, and the free C free Radicals and reactive oxygen species generate CO. This shows that in the C2H6 oxidative dehydrogenation reaction, the concentration of CO2 in the system is an important parameter. If the concentration of CO2 is too low, the conversion rate of C2H6 will be low, and high-carbon hydrocarbons will be easily generated; if the concentration of CO2 is too high, the oxidation reaction of C2H6 will occur, resulting in a decrease in the selectivity of C2H4 and C2H2. Therefore, it is better to add CO2 at about 50%.