Study Of Carbon Capture From Cement Plant Using MEA Combined With Waste Heat Recovery For Power Generation

The excessive emission of greenhouse gas leads to global warming, carboncapture and storage (CCS) and improving energy utilization efficiency are two of themost significant technologies to mitigate climate change. As the second carbonemission resource next to power plant, cement plant produces932megaton carbondioxide per year. Large amount of waste heat fail to be fully used during cementproduction process which leads to low energy efficiency in cement industry. The onlysolution to carbon reduction in cement industry is to combine CCS and efficient wasteheat utilization technology. This paper proposes a novel carbon capture system usingMEA combined with waste heat recovery for power generation in cement plant. Onthe basis of energy cascade utilization principle, low pressure steam of dual-pressurewaste heat generating system can be used to meet the heat requirement of re-boiler inMEA carbon capture system. The system can achieve both power generation andcarbon capture in cement industry.Aspen Plus software is employed for simulation of MEA carbon capture system,simulation results of re-boiler duty, as well as parametric influence of flue gas loadand pressure in Stripper can be obtained. Visual Basic is used for model developmentof dual-pressure waste heat generating system, parametric study has been conductedtargeting on performance of power generation and heat supply to re-boiler. Based onabove calculation results, technical analysis and economic evaluation has been donefor carbon capture system using MEA combined with waste heat recovery for powergeneration in cement plant. In technical analysis, this paper develop ps parametricdesign for systems with different carbon capture rate, variation of carbon capture rateand generating capacity can be obtained under different flue gas load and pressure ofhigh-pressure steam. In economic evaluation, this paper assesses economicperformance by estimating economic index of Cost of Electricity (COE), Net PresentValue (NPV) and Cost of Capture (COC).