Techno-economic analysis of the coal-to-olefins(CTO)process with CCS
Olefins as one of the most important derivative chemicals of oil are increasingly produced by coal in China.The coal-to-olefins(CTO)process is advantageous in economic aspect compared with the oil-to-olefins process.However,a large amount of CO2 is emitted from this process.Carbon capture and storage(CCS)has been accepted as the most efficient way for reduction of CO2 emissions.This paper conducts a techno-economic analysis of CTO plants with CCS in comparison with methanol-to-olefins(MTO)plants.Results show that energy penalty and additional capital investment for CCS plays a small role in CTO plants,however,CO2 transportation,geological sequestration and monitoring costs,and additional utilities cost make the product cost increase from 6426 RMB/t to 7942 RMB/t as carbon capture rate range from 0%to 95%,an increase of about 23.6%.Compared with MTO plants,CTO plants are more economical and risk-resistant.It is also found that the optimal carbon capture rate is 90%from the aspects of energy efficiency,economic performance,and environmental protection and economies of scale have more effect on capital investment than product cost.If the capacity of CTO plants increases from 0.6Mt/a to 2.0Mt/a,the total capital investment and product cost will drop approximately 35%and 9%,respectively.Finally the effects of coal price,methanol price,CO2 price on product cost are analyzed.
Olefins Coal-to-olefins CCS Techno-economic Capital investment Product cost
Dong Xiang Siyu Yang Liu Xia Yu Qian
School of Chemical Engineering,South China University of Technology,Guangzhou 510640
国际会议
桂林
英文
1-16
2013-07-16（万方平台首次上网日期，不代表论文的发表时间）