Study On CO₂ Emission Reduction Assessment System And Reduction Technology Of Petrochemical Enterprises

Petrochemical enterprises are an important source of CO2, in view of the "Kyoto Protocol" signed and the climate conference in Copenhagen in which China has made commitments to reduce GHG emissions, research on energy consumption as well as CO2 emissions of China's Petrochemical Enterprises is very necessary to provide the theoretical basis to CO2 emission reductions of China's Petrochemical Enterprises.Aimed at CO2 emission situation of China's Petrochemical Enterprises, according to China's four major flows of crude oil processing, the refining process features and the composition of exhaust gas of refinery companies, establish a systematic and comprehensive evaluation system on CO2 emissions of refineries. Meanwhile, the effects of improved thermal K2CO3 solution absorbing CO2 were studied in small and static experimental devices to realize CO2 resource use and ultimately reduce emissions.Macro assessment indicated that the largest source of CO2 emissions of refineries was fuel combustion, accounting for more than 90% of total CO2 emissions of refineries. The paper took CO2 emissions produced by fuel combustion in China's Petrochemical Enterprises for example, it is about 290 Mt/a by using self-designed calculating software; While it is about 330 Mt/a using the internationally used method (IPCC). At the same time, saving energy and reducing emissions, clean development mechanism (CDM) and CO2 utilization were analyzed and the energy conservation measures were proposed for China's Petrochemical Enterprises.Absorption and desorption characteristics of improved thermal K2CO3 solution absorbing CO2 were studied in a small static test device. The results showed that: adding 3% PZ (w%) and 3% TEA (w%) by ratio of 1:1 to 30% K2CO3 (w%)solution, when the temperature of the mixed absorbing liquid was 90℃, the absorption effect was best, CO2 absorption rate was up to 80% and absorption load was up to 90%. Saturated absorption solution can be regenerated at atmospheric pressure and 100℃, when reaction time was 30 min, CO2 desorption rate was up to 80%, followed by leveling off in CO2 desorption rate. The experimental procedures and operations are simple, the absorption and desorption of the system are excellent, and can be achieved with industrial application.