CARBONATE CONVERSION OF METHANE

A catalyst with high catalytic activity has been developed for the methane carbonate conversion reaction. Various factors (ratio CO2:CH4, temperature, initial volume rate and other factors, the yield of the desired product, process conversion and selectivity, as well as the effect of various promoters on catalyst activity in the presence of the selected catalyst in the methane carbonate conversion reaction rate) have been studied. As a result of the study, the following optimal reaction conditions were selected: CO2:CH4 =1,5, T=820 C, Vmethane = 1000 h. Based on the obtained results, a process mechanism is proposed. The reasons for the inactivation of the methane carbonate conversion reaction catalyst and its regeneration are discussed. Introduction. Today, around the world, 25 billion tons of carbon dioxide are emitted into the atmosphere every year. As a result of such a sharp increase in the amount of carbon dioxide in the atmosphere, an increase in temperature on Earth is predicted by 0.35 degrees over the next 15-20 years and by 1.5-2 degrees over 100120 years. This creates global environmental and economic problems [1-3]. The most promising way to solve this environmental problem is to synthesize gas by converting carbon dioxide into methane and producing methanol based on it [4-6]. The process of converting methane to carbon dioxide and producing "synthesis gas" has not yet been introduced into the industry due to the lack of a long-term stable catalyst, but it is important in terms of CO2 losses. Methane carbonate conversion is also a promising method with the simultaneous use of two different gases (methane and carbon dioxide), which cause a "greenhouse effect" and are of important environmental and economic importance. The methane carbonate conversion reaction is most important among synthesis gas (H2 and CO) production reactions. This process is an important reaction for the production of hydrogen in industry and is of great importance in the production of high molecular weight hydrocarbons, methanol, oxygen-containing organic substances and important products of the chemical industry according to the Fischer-Tropsch method [9-22]. The general equation of the methane carbonate conversion reaction is: CH4 + CO2 ↔ 2CO + 2H2, ∆H298K 0 = + 247 kJ/mol Additional reactions that may occur when methane is converted to carbonate: 1. CO2 + H2 ↔ CO + H2O, ∆H298K 0 = -41,1 kJ/mol 2. CH4 → C+ 2H2, ∆H298K 0 = +74,8 kJ/mol 3. CO2 + 4H2 ↔ CH4 + 2H2O, ∆H298K 0 = -165,0 kJ/mol 4. CH4 + H2O ↔ CO + 3H2, ∆H298K 0 = +206,0 kJ/mol 5. 2CO ↔C+ CO2, ∆H298K 0 = -72,5 kJ/mol 116  Korszerű műszerek és algoritmusa tapasztalati és elméleti tudományos kutatási  Hang 1