Research on the conversion of propane and butane under the action of plasma

• Categories:Technical Support
• Author:Plasma cleaning machine-CRF plasma plasma equipment-plasma surface treatment machine manufacturer-chengfeng intelligent manufacturing
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• Time of issue:2022-02-07
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(Summary description)Research on the conversion of propane and butane under the action of plasma: Propane is the main component of natural gas, oilfield gas and refinery gas. Propane is a saturated alkane, and its economic value is low when it is directly utilized. However, propylene has a large gap, so it is necessary to study the olefination of propane. my country has abundant natural gas and petroleum resources. With their continuous development and utilization, propane in natural gas, oil field gas and refinery gas has increased sharply. Therefore, the development of propane production of propylene technology is of great importance for the rational use of propane and the development of new sources of propylene. Significance. At present, there are three main ways of propane dehydrogenation: propane high temperature steam cracking, propane catalytic deradon and propane oxidative dehydrogenation. The propylene yield of propane high temperature steam cracking dehydrogenation is too low, and the propane conversion rate of propane catalytic dehydrogenation reaction is too low; propane oxidative dehydrogenation can break the thermodynamic barrier of the reaction, and theoretically can obtain higher selectivity and yield. Rate. The current oxidants are mainly O2 and CO2. O2 is used as an oxidant for oxidative dehydrogenation. Due to the high activity of oxygen, there are many by-products. The selectivity of propylene is low, and the milder oxidant CO2 is often used, which can make full use of abundant The CO2 resource can reduce environmental pollution, so it has received more attention in recent years. Coupling the reverse water gas shift reaction with the direct dehydrogenation of propane, that is, using CO2 as the oxidant to oxidize propane to propylene, on the one hand, the thermodynamic equilibrium of the direct dehydrogenation of propane can be shifted, and it is possible to obtain higher olefin selectivity; Therefore, it has a strong application prospect because of CO2 that causes the global greenhouse effect. But the important problem at present is to find a suitable catalyst to make the reaction of CO2 oxidation of C3H8 better. The main product of propane under the action of pure plasma is C2H2 propane conversion and C2H2 yield increase with the increase of plasma energy density. The active species detected by 0ES online are mainly H and methyl radicals, indicating that the C-C bond is mainly broken in propane in the plasma, followed by the C-H bond. The main product of propane under the combined action of plasma and Ce4.34-Ni2.75-Zn-O/Y-Al2O3 catalyst is still acetylene, but a small amount of propylene is generated, indicating that plasma activation plays a leading role in this reaction, while Ce4 The .34-Ni2.75-Zn-O/Y-Al2O3 catalyst only plays the role of modulation. The main product of n-butane under the action of pure plasma plasma is C2H2, which is because the bond energy of CC bond is lower than that of CH bond. Under the action of atmospheric plasma plasma, the CC bond is preferentially broken to form CHx active species, which further reacts C2H2 is preferentially generated.