CAJ | 학술논문

在化学吸收法捕集分离CO2过程中，吸收热和再生能耗是评价吸收剂性能的重要指标，也是进行工艺条件设计和捕集成本评估的重要依据。稠浆型碳酸钾吸收工艺可以降低再生过程中水的参与度，被认为是实现燃煤电厂烟气中CO2大规模捕集的颇具潜力的减排技术之一。文中采用真实热流法测量碳酸钾溶液对 CO2的吸收热，分析反应温度、溶液浓度、CO2负载和结晶效应等对吸收热的影响，为稠浆型工艺的设计和模拟提供了必要的基础数据。研究表明：在没有结晶出现的情况下，反应温度和碳酸钾浓度的影响较小，吸收热随 CO2负载的增加而减小。出现结晶后，温度和浓度的影响增大，同时结晶热效应导致吸收热的规律产生很大变化。此外，对稠浆型工艺进行评估时，需要综合对比考虑水的气化潜热、结晶热和公用冷却水用量等因素。
재화학흡수법포집분리CO2과정중，흡수열화재생능모시평개흡수제성능적중요지표，야시진행공예조건설계화포집성본평고적중요의거。주장형탄산갑흡수공예가이강저재생과정중수적삼여도，피인위시실현연매전엄연기중CO2대규모포집적파구잠력적감배기술지일。문중채용진실열류법측량탄산갑용액대 CO2적흡수열，분석반응온도、용액농도、CO2부재화결정효응등대흡수열적영향，위주장형공예적설계화모의제공료필요적기출수거。연구표명：재몰유결정출현적정황하，반응온도화탄산갑농도적영향교소，흡수열수 CO2부재적증가이감소。출현결정후，온도화농도적영향증대，동시결정열효응도치흡수열적규률산생흔대변화。차외，대주장형공예진행평고시，수요종합대비고필수적기화잠열、결정열화공용냉각수용량등인소。
ABSTRACT:In the process of carbon dioxide capture by chemical absorption, absorption enthalpy and energy consumption for regeneration are important index to evaluate absorbent performance evaluation and design operation conditions. Carbonate slurry process is considered to be one of the potential technologies for large-scale CO2 capture from coal-based power stations, as it can reduce the participation of water in stripper. In this paper, true heat flow method was adopted to measure absorption enthalpy during the absorption of CO2 in aqueous potassium carbonate solutions. The effect of temperature, concentration, CO2 loading and crystallization on absorption heat were also discussed, which provides basic data for the design and simulation of carbonate slurry process. Without crystallization, absorption heat decreases with CO2 loading increasing, effects of reaction temperature and K2CO3 concentration are not significant. In the present of crystallization, temperature and concentration effects become important and absorption heat changes much because of crystallization enthalpy. Besides, Latent heat of water vaporization, crystallization enthalpy and cooling water demand should be considered for the energy consumption evaluation of carbonate slurry process.