Lingyan Gui, Jian Yang*, Jiangtao Wu and Xianyang Meng,
{"title":"Isobaric Heat Capacity Measurements of Methanol by Flow Calorimeter at Elevated Temperatures and Pressures","authors":"Lingyan Gui, Jian Yang*, Jiangtao Wu and Xianyang Meng, ","doi":"10.1021/acs.jced.3c00745","DOIUrl":null,"url":null,"abstract":"<p >Methanol is the world’s recognized renewable, environmentally friendly, efficient low-carbon biofuel and can be widely used in various fields. Based on the new high temperature and pressure flow calorimeter developed in this work, the isobaric heat capacity of fluids can be measured at temperatures <i>T</i> = 298–573 K and pressures up to 15 MPa. The heat loss of the flow calorimeter was calibrated by <i>n</i>-heptane at various temperatures. The isobaric specific heat capacity <i>c</i><sub><i>p</i></sub> of methanol was measured for temperatures <i>T</i> ranging from 298 to 573 K and pressures <i>p</i> ranging from 0.1 to 15 MPa in both liquid and vapor phases. The experimental data were compared and agreed well with the Helmholtz equation of state (EoS), indicating the average absolute deviation (AAD) of 0.32% and 0.80% for liquid and vapor phases, respectively. A new correlation of heat capacity with temperature and pressure was proposed and used to fit the experimental data of methanol both in liquid and vapor phases, which showed better performance than other models. Based on the new model, our data were able to compare with the available published experimental data, and most data agreed well with our correlation.</p>","PeriodicalId":42,"journal":{"name":"Journal of Chemical & Engineering Data","volume":null,"pages":null},"PeriodicalIF":2.0000,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Chemical & Engineering Data","FirstCategoryId":"1","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acs.jced.3c00745","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Methanol is the world’s recognized renewable, environmentally friendly, efficient low-carbon biofuel and can be widely used in various fields. Based on the new high temperature and pressure flow calorimeter developed in this work, the isobaric heat capacity of fluids can be measured at temperatures T = 298–573 K and pressures up to 15 MPa. The heat loss of the flow calorimeter was calibrated by n-heptane at various temperatures. The isobaric specific heat capacity cp of methanol was measured for temperatures T ranging from 298 to 573 K and pressures p ranging from 0.1 to 15 MPa in both liquid and vapor phases. The experimental data were compared and agreed well with the Helmholtz equation of state (EoS), indicating the average absolute deviation (AAD) of 0.32% and 0.80% for liquid and vapor phases, respectively. A new correlation of heat capacity with temperature and pressure was proposed and used to fit the experimental data of methanol both in liquid and vapor phases, which showed better performance than other models. Based on the new model, our data were able to compare with the available published experimental data, and most data agreed well with our correlation.
期刊介绍:
The Journal of Chemical & Engineering Data is a monthly journal devoted to the publication of data obtained from both experiment and computation, which are viewed as complementary. It is the only American Chemical Society journal primarily concerned with articles containing data on the phase behavior and the physical, thermodynamic, and transport properties of well-defined materials, including complex mixtures of known compositions. While environmental and biological samples are of interest, their compositions must be known and reproducible. As a result, adsorption on natural product materials does not generally fit within the scope of Journal of Chemical & Engineering Data.