DEVELOPING OF REFINED CO2 EMISSION FACTORS FROM METHANOL PRODUCTION AT THE ENTERISES OF THE RUSSIAN FEDERATION

Petrochemical industry is a significant source of greenhouse gas emissions in the Russian Federation. The main contribution to emissions comes from ethylene, methanol and carbon black production enterprises. In order to carry out a correct estimation of emissions in the Russian national greenhouse gas inventory, it is very importance to improve the estimation of emissions from these sources. In the article carbon dioxide emission factors from methanol production in the Russian Federation are developed. They are based on the data provided by the methanol producers. To improve the emission factors, the IPCC methodology was used, which consist in calculating the difference between input of carbon into the production process in the raw materials and fuels and the leaving of carbon in the products. The calculated emission factors for enterprises depend on the methanol production technology used at the enterprises. They vary widely: from 0.36 CO₂/t methanol to 1.24 t CO₂/t methanol. Enterprises using similar technologies are characterized by similar values of emission factors. The standard deviation from the average emission factor value for such enterprises does not exceed 10%. National emission factors were calculated for years as a methanol production-weighted average of individual plant emission factors. Over the period from 1995 to 2020, the national CO₂ emission factor from methanol industry decreased significantly (by 25-27%) from 0.801 t CO₂/ton of methanol in 1995 to 0.585-0.598 t CO2/ton of methanol in 2020-2022. The reduction in carbon dioxide emissions from methanol production in recent years is associated with the modernization of enterprises and the construction of new modern production facilities. The average CO₂ emission factor for 2020-2022 equal to 0.59 t CO2/ton of methanol can be used to estimate CO₂ emissions from methanol production in the country during next several years in the absence of significant changes in the industry.