摘要
为克服易挥发液体燃烧热难于直接测量、测量准确度不高、测量费时的缺点,以低碳醇为代表,通过筛选合适的液体外包裹材料、优化液体进样方式、更新内筒水量确定标准等措施改进测量方法。发现以薄膜为外包裹材料、注射器密封进样方式,获得异丙醇的标准摩尔生成焓约为-321.34kJ/mol,相对误差为-1.09%,相对标准偏差为-7.53%。以标识线和恒温水浴确定内筒加水量和水温,平均每次样品实验约耗时30min左右,测量效率有较大提高。
In order to overcome the shortcomings of measuring volatile liquid combustion heat, such as being difficult to measure directly, low accuracy and time-consuming, lower alcohols were taken as samples to study improved measurement method by screening suitable liquid outer wrapping materials, optimizing liquid injection mode, and updating the inner cylinder water quantity determination standard. It was found that using the improved method with the syringe sealed injection and the film as the outer wrapping material, the measured standard molar formation enthalpy of isopropanol was about-321.34 kJ/mol with a relative error of-1.09% and a relative standard deviation of-7.53%. The water volume and water temperature of the inner cylinder were determined by the marking line and the constant temperature water bath. The average time of each sample experiment was about 30 minutes, and the measurement efficiency was greatly improved.
作者
赵金和
金长义
梁佳国
蒙君荣
刘晓凤
ZHAO Jin-he1,2, JIN Chang-yi1, LIANG Jia-guo1, MENG Jun-ron1, LIU Xiao-fen1(1. College of Chemiswy and Environment Engineering, Baise University, Baise 533000, China; 2. Guangxi Key LaboratoPy of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, China)
出处
《天然气化工—C1化学与化工》
CAS
CSCD
北大核心
2018年第5期63-65,共3页
Natural Gas Chemical Industry
基金
2018年度广西高校中青年教师基础能力提升项目(2018KY0577)
2014年广西高校重点学科立项建设项目-材料物理与化学(桂教科研[2013]16号)
百色学院青年教师成长工程资助项目(百院字[2012]116号)
2016年广西石化资源加工及过程强化技术重点实验室开放基金(2016K008)
关键词
易挥发液体
燃烧热
快速测定
低碳醇
volatile liquids
combustion heat
rapid determination
lower alcohols
