一种氨法脱碳氨水乙醇混合吸收剂结晶动力学特性研究

发布时间：2018-03-20 16:25

本文选题：氨水　切入点：乙醇　出处：《中国电机工程学报》2014年05期 　论文类型：期刊论文

【摘要】：针对目前氨法脱除二氧化碳研究中存在的问题,该文提出一种低浓度氨水强化结晶低能耗捕集CO2的工艺,采用新型的氨水乙醇混合吸收液,利用半连续鼓泡反应系统考察停留时间对结晶的影响。发现随着停留时间的延长,晶体产物的粒径分布逐渐改善,平均粒径亦在前30 min保持一定增长速率,晶体形貌趋于完整,且结块问题也可以得到一定程度的解决。综合考虑,该实验条件下较适宜的停留时间为30~40 min;同时对结晶动力学进行初步探索,确定了该实验中晶体的生长机制为粒度无关生长,并给出了晶体成核速率与生长速率的生长动力学模型为B0=4.172×106G1.090。为接下来新工艺的进一步研究提供基础数据和参考,并对实际工艺的发展和改善具有借鉴意义。
[Abstract]:In view of the existing problems in the study of ammonia removal of carbon dioxide, a new process of strengthening crystallization and low energy consumption to capture CO2 with low concentration ammonia water was proposed, and a new mixed absorption solution of ammonia water and ethanol was adopted. The effect of residence time on crystallization was investigated by semi-continuous bubbling reaction system. It was found that with the increase of residence time, the particle size distribution of the crystal product gradually improved, the average particle size also maintained a certain growth rate in the first 30 min, and the crystal morphology tended to be complete. And the problem of caking can be solved to a certain extent. Considering the experimental conditions, the suitable residence time is 30 ~ 40 min. At the same time, the crystallization kinetics is preliminarily explored, and the crystal growth mechanism is determined to be particle size independent growth. The growth kinetics model of crystal nucleation rate and growth rate is provided for the further study of the new process, and it is of great significance for the development and improvement of the practical process. The model of the growth kinetics of the crystal nucleation rate and the growth rate is provided for the further study of the new technology in B0O 4.172 脳 106G1.090.
【作者单位】：哈尔滨工业大学能源科学与工程学院;
【基金】：科技部国际合作项目(2010DFA24580-502)~~
【分类号】：X773

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