ASSESSMENT OF CO2 REMOVAL FROM POWER-STATION FLUE-GAS

被引:9
作者
LECI, CL
GOLDTHORPE, SH
机构
关键词
FLUE GAS; POWER STATION; CO2; REMOVAL; COMPARISON; OPERATING COST; CAPITAL COST; MEMBRANES;
D O I
10.1016/0196-8904(92)90046-Y
中图分类号
O414.1 [热力学];
学科分类号
摘要
Commercially available techniques for the removal of 90% of CO2 from power station flue gas were investigated by H&G for British Coal Corporation. This work was part of British Coal's studies of CO2 abatement technologies. The two cases examined were based on:-A A gas containing a low concentration of CO2 produced by a 500 MW(e) conventional pulverised fuel (PF) power station. B A gas containing a high concentration of CO2 produced by a novel power station design in which coal is burnt in a mixture of oxygen and recycled flue gas. A screening of commercially proven CO2 removal processes established that for Case A either aqueous monoethanolamine (MEA) or hot potassium carbonate (HPC) were suitable. For Case B either HPC or gas permeation membranes were identified as suitable. An analysis of operating costs including the impact on plant efficiency but excluding the cost of oxygen in Case B , revealed that for Case A the use of MEA would be 30% cheaper than the use of HPC;whereas for Case B a 50% operating cost advantage was identified for the use of membranes compared with HPC. Thus MEA and membranes were selected for further evaluation for cases A and B respectively. Capital cost estimates for the CO2 removal process arras were subsequently derived for the preferred options for the two cases. For a UK greenfield site, the capital costs of the CO2 removal sections were estimated to be 98 million pounds for Case A . For Case B an estimated 36 million pounds was obtained for purification of CO2 with a gas permeation membrane. Some major technical constraints for the selected process routes were identified including the detrimental effect on operability of particulate carryover from the FGD and the high levels of SO2.
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页码:477 / 485
页数:9
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