化工进展2025，Vol.44Issue(7)：3757-3769,13.DOI:10.16085/j.issn.1000-6613.2024-0731
超重力-微界面法制备类球形纳米碳酸钙
Preparation of spheroidal nano-calcium carbonate via high gravity-microinterface method
摘要
Abstract
Using polyethyleneimine(PEI)as a morphological control agent,methanol as a dispersant,calcium hydroxide solution and CO2 as raw materials,the preparation of spheroidal nano-calcium carbonate was investigated via a high gravity-microinterface method.The size of gas bubbles within the reactor was analyzed using a high-speed camera.The effects of reaction temperature,CO2 flow rate,concentration of calcium hydroxide solution,volume fraction of methanol,and amount of PEI added on the morphology of the calcium carbonate product were investigated.An orthogonal experimental design was used to optimize the carbonation reaction conditions of calcium hydroxide.The morphology of the reaction products was characterized using SEM,XRD,and FTIR analytical methods.The results demonstrated that the high gravity-microinterface carbonation reactor effectively transformed CO2 bubbles from millimeter scale to micrometer scale,enlarging the gas-liquid interfacial area and enhancing mass transfer between phases.The optimal conditions for the carbonation reaction of calcium hydroxide with CO2 were found to be a calcium hydroxide concentration of 8%,a PEI addition of 4%by mass of calcium hydroxide,a methanol volume fraction of 20%,a CO2 flow rate of 2.5L/min,and 12℃.Under these conditions,the prepared spheroidal nano-calcium carbonate particles ranged in size from 40nm to 60nm.关键词
类球形纳米碳酸钙/超重力/微界面/气泡/传质Key words
spheroidal nano-calcium carbonate/high gravity/microinterface/bubble/mass transfer分类
化学化工引用本文复制引用
孙金磊,廖丹葵,陈小鹏,童张法..超重力-微界面法制备类球形纳米碳酸钙[J].化工进展,2025,44(7):3757-3769,13.基金项目
国家自然科学基金(52162004). （52162004）
