关键词: CO₂捕集, 化学吸收, 相变吸收剂, 水溶性, 氨基种类

Abstract:

Biphasic solvents have a promising application prospect own to the lower regeneration energy consumption character. However, complex screening works usually need to be done when new physical-chemical biphasic solvents were developed. In order to solve this problem, this paper firstly selected different water-soluble physical solvents and amino groups amines, and then carried out absorption, phase separation and regeneration experiments in turn using a small experimental device to explore the effects of water-soluble and amino groups on the performance of biphasic solvent. It was found that the water solubility of the physical solvent had no obvious regular relationship with the absorption and regeneration performance of the solution, but the biphasic solvent composed of hydrophobic physical solvent had lower rich phase ratio and higher rich phase CO₂ ratio. The solution containing only tertiary amino group had good regeneration performance, but the absorption rate increased slightly and the absorption load decreased compared with the aqueous amine solution. The type of amino group had little effect on the phase separation performance, but the number of amino groups affected the change range of rich phase ratio.

Key words: CO₂ capture, chemical absorption, biphasic solvent, water-solubility, amino type