低冷量下强化CO_(2)吸收的甲醇基纳米流体性能  

Performance of methanol-based nanofluids with enhanced CO_(2) absorption under low cooling demand

作　　者：武西宁 张宁 秦佳敏 徐龙[1] 魏朝阳 马晓迅[1] WU Xining;ZHANG Ning;QIN Jiamin;XU Long;WEI Chaoyang;MA Xiaoxun(International Science&Technology Cooperation Base of MOST for Clean Utilization of Hydrocarbon Resources,Chemical Engineering Research Center of the Ministry of Education for Advanced Use Technology of Shanbei Energy,Shaanxi Research Center of Engineering Technology for Clean Coal Conversion,Collaborative Innovation Center for Development of Energy and Chemical Industry in Northern Shaanxi,School of Chemical Engineering,Northwest University,Xi’an 710127,Shaanxi,China)

机构地区：[1]西北大学化工学院,碳氢资源清洁利用国际科技合作基地,陕北能源先进化工利用技术教育部工程研究中心,陕西省洁净煤转化工程技术研究中心,陕北能源化工产业发展协同创新中心,陕西西安710127

出　　处：《化工进展》2024年第5期2811-2822,共12页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(52106271);西安市科技计划(22GXFW0132);陕西省创新能力支撑计划(2024RS-CXTD-53);陕西省重点研发计划(2024GX-YBXM-428);西北大学研究生创新项目(CX2023154)。

摘　　要：冷甲醇洗法捕集CO_(2)技术要求低温环境,需要大量的冷冻能量,能耗较大。在吸收剂中引入纳米颗粒,可以有效提高气液传质速率,降低能耗。本研究旨在开发冷量需求少,吸收、解吸性能提升的甲醇基纳米流体。实验分别考察了纳米颗粒种类、固含量、尺寸,表面活性剂含量、操作温度和初始CO_(2)浓度等因素对吸收剂捕集CO_(2)性能的影响及机理。结果表明,在0.2~1.0g/L的TiO_(2)、Al_(2)O_(3)、SiO_(2)纳米流体中,0.4g/L的TiO_(2)-甲醇纳米流体的CO_(2)吸收、解吸增强效果最佳。向其中添加0.10%(质量分数)聚乙二醇辛基苯基醚(Triton X-100)后,纳米流体的吸收、解吸增强效果达到最大,且在5次循环后仍呈现良好增强效果。此外,本文对纳米流体增强吸收的机理进行了深入分析,提出了一个经验公式来预测TiO_(2)-甲醇纳米流体的增强因子E和最佳固含量。The rectisol process for capturing CO_(2) requires low-temperature environment,a significant amount of freezing energy,and considerable energy consumption.Introducing nanoparticles into absorbents can effectively enhance the gas-liquid mass transfer rate and reduce energy consumption.This study aimed to develop methanol-based nanofluids with reduced cooling demand and improved absorption and desorption performance.The effects of factors such as the type of nanoparticles,solid loading,particle size,surfactant content,temperature,and initial CO_(2) concentration on CO_(2) capture performance were investigated,and the impact mechanisms were studied.The results indicated that the CO_(2) absorption and desorption enhancement effect of TiO_(2)-methanol nanofluid with a concentration of 0.4g/L was the best among TiO_(2),Al_(2)O_(3) and SiO_(2) nanofluids with concentrations ranging from 0.2-1.0g/L.After adding 0.10% polyethylene glycol octylphenyl ether(Triton X-100),the absorption and desorption enhancement effect of the nanofluid were the highest,and it still showed a noteworthy enhancement effect after 5 cycles.Furthermore,this article provided an in-depth analysis of the mechanism of enhanced absorption of nanofluids and proposed an empirical formula to predict the enhancement factor E and optimal solid loading of TiO_(2)-methanol nanofluids.

关 键 词：二氧化碳捕集 鼓泡反应器 模型 纳米流体 低冷量供给 传质增强 

分 类 号：TQ028[化学工程] TQ021.4