吗啉的CO_2吸收及核磁共振波谱实验研究

Experimental Study on the CO_2 Absorption and Nuclear Magnetic Resonance Spectra of Morpholine

吗啉(MOR)是一种环状胺,具有作为CO_2吸收剂的潜力.本研究对吗啉溶液进行CO_2吸收实验和核磁共振(NMR)波谱实验,通过吸收容量及不同CO_2担载下NMR图像的变化规律,反映MOR-CO_2-H2O系统化学反应的变化趋势,评价MOR溶液的吸收表现.吸收实验结果表明MOR的吸收容量为0.48 molCO_2/mol胺,与5 MMEA的结果接近.定量NMR实验结果反映了各组分峰的化学位移及变化规律.定量13CNMR实验结果表明系统各组分的摩尔分数变化规律符合反应机理假设.

Morpholine(MOR)is a cyclic amine with potential use as a CO2 absorbent.In this study,MOR solution was subjected to CO2 absorption and nuclear magnetic resonance(NMR)spectroscopy experiments.The systemic MOR-CO2-H2 O chemical reactions and absorption performance of the solution were observed in terms of absorption capacity and variations in NMR images under different CO2 loadings.The results of absorption experiments showed that the absorption capacity of MOR was 0.48 mol CO2/mol amine,which was similar to that of 5 M MEA.Qualitative NMR results reflected the chemical shifts and changes in the peaks of each component.The results of quantitative 13 C NMR experiments showed that the molar fraction of each component of the system was in accordance with the assumptions of the related reaction mechanism.