Investigation on solubility of hydroxy dibasic acids in alkanolamine solutions

6th Global Conference on Materials Science and Engineering

Du, M.^1

School of Shipping and Naval Architecture, Chongqing Jiaotong University, Chongqing

400074, China^1

关键词: CO2 absorption;    Dibasic acids;    Temperature range;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/283/1/012023/pdf
DOI  :  10.1088/1757-899X/283/1/012023

来源: IOP

【 摘 要 】

Solubilities of three hydroxy dibasic (adipic, suberic, and sebacic) acids in alkanolamine solutions were measured within the 30-90 temperature range. It is found that solubility of these acids sharply grows with temperature and concentration of alkanolamine solvent. In addition, the study substantiates the adjustment of pH to optimize the CO2absorption and desorption processes. The precipitation of added acids from alkanolamine solvents by cooling is found to be quite problematic, which makes the recovery of residual acids from lean alkanolamine solvents non-feasible and requires the application of alternative methods.