范永胜,龚海艇,李偲,陈臻,高晓艺,李目一,李小姗,张立麒

• 1:国家能源集团江苏电力有限公司
• 2:国家能源集团泰州发电有限公司
• 3:华中科技大学煤燃烧与低碳利用全国重点实验室

摘要(Abstract)：

碳捕集、利用与封存技术是我国实现“双碳”目标的重要途径，其中非水吸收剂具有巨大的节能潜力，且适配现有吸收法混胺反应器，具有较大应用潜力，但存在CO_2饱和溶液黏度大、循环负荷低等问题。对此，以仲胺MCA为吸收组分，EG为有机溶剂，构建了低黏度、低温再生非水吸收体系，并考察了MCA/EG的吸收、再生性能。结果表明：3mol/L MCA/EG吸收剂的吸收负荷可达2.14 mol/L，黏度仅为44.19 m Pa·s；在40℃吸收30 min、80℃再生25 min条件下，循环负荷高达0.98 mol/L，为质量分数为30%的MEA/H_2O溶液在105.5℃再生条件下循环负荷的1.46倍。通过C80微量热仪测试得到吸收剂的反应热为–82.85 k J/mol，低于MEA/H_2O溶液。结合~(13)C NMR与量子化学计算，探究了吸收剂捕集CO_2的反应机理，发现MCA的空间位阻效应降低了反应产物的稳定性，使氨基甲酸酯与EG进一步反应转化为烷基碳酸酯，降低了再生难度，实现了低温再生。该吸收体系可实现非水吸收剂的稳定运行，并扩大吸收剂再生中的余热利用范围，具有较大的降能耗优势。

关键词(KeyWords)： CO_2捕集;非水吸收剂;空间位阻胺;低温再生

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目（52106143）~~

作者(Author): 范永胜,龚海艇,李偲,陈臻,高晓艺,李目一,李小姗,张立麒

DOI: 10.19666/j.rlfd.202412271

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