کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7843522 | 1506522 | 2018 | 26 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Gibbs energy additivity approaches to QSPR in modelling of isentropic compressibility of biodiesel
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Gibbs energy additivity approaches to QSPR in modelling of isentropic compressibility of biodiesel Gibbs energy additivity approaches to QSPR in modelling of isentropic compressibility of biodiesel](/preview/png/7843522.png)
چکیده انگلیسی
Isentropic compressibility (Ks, or reciprocal of isentropic bulk modulus) provides an important information about the space among molecules or about how much the substance can be compressed. Direct measurement of Ks of a liquid or a biodiesel cannot be easily performed. The value has generally been obtained from the speed of sound and density through the Newton-Laplace equation. In this study, Ks values of fatty acid methyl ester (FAME) reported in literatures are determined via direct correlation to the Gibbs free energy (associated with isentropic compression, ÎGKs) through the Gibbs energy additivity method. The derived equation lnks=lnAâ²+ÎGKsRT with the numeric constants is then applied to estimate the Ks of biodiesels with good accuracy. Only the average carbon numbers and average number of double bond(s) of the biodiesel are required for the calculation. The estimated KS values at different temperatures are in good agreement with the conventional method of calculation from the speed of sound and density. The overall AAD for FAMEs was 0.08%, while the overall AAD for 16 different biodiesels (neat and blended) was 0.92%. Thus, the proposed model would facilitate the researchers to estimate the KS a FAME or a biodiesel.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Liquids - Volume 249, January 2018, Pages 126-131
Journal: Journal of Molecular Liquids - Volume 249, January 2018, Pages 126-131
نویسندگان
Piyawan Krisanangkura, Supathra Lilitchan, Suriya Phankosol, Kornkanok Aryusuk, Kanit Krisnangkura,