Abstract: Carbon capture and storage (CCS) consists of separation,compression, transportation and storage of CO₂ from exhaust gas such as vent gases of coalfired power plant. CCS is considered to be the most effective choice for mitigating greenhouse gas of CO₂ in the middle and short-term, and attracts more attention recently. Although CCS has been proved to be feasible in technology, it is still unsuitable for commercialization on a large scale due to high cost at present. Most models developed for cost estimation focused on individual process of CCS, especially on capture process. In this paper, definition formulas were given to calculate the total cost of CCS overall process and of emission cuts of CO₂. Furthermore, a model economy is developed to estimate total capital and cost for MEA capture,compression, pipeline transportation and saline storage. The economic study for a case of 600 MW PC power plant is also carried out in the paper. The results show that,when CO₂ recovery efficiency ranges from 70% to 99%,the total CCS cost for the case is 257—269 CNY·(t CO₂)^-1,and the cost for emission reduction of CO₂ is 364.8—384.2 CNY·(t CO₂)^-1 respectively.

Key words: CO₂ capture；CO₂ transportation, saline storage；power plant；economic