Hydrogen bonding of acetic acid in CO2 plus n-pentane mixed fluids in the critical region

被引：11

作者：

Mu, TC ^{[1
]}

Han, BX ^{[1
]}

Zhang, JL ^{[1
]}

Li, ZH ^{[1
]}

Liu, ZM ^{[1
]}

Du, JM ^{[1
]}

Liu, DX ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Beijing 100080, Peoples R China

来源：

JOURNAL OF SUPERCRITICAL FLUIDS | 2004年 / 30卷 / 01期

基金：

中国国家自然科学基金;

关键词：

acetic acid; FTIR; cosolvent; dimerization;

D O I：

10.1016/S0896-8446(03)00163-3

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Fourier transform infrared (FTIR) spectra and hydrogen bonding of acetic acid in CO2 (1) + n-pentane (2) mixture were studied at 308.2 K up to 11 MPa. The experiments were conducted in the mixed supercritical (SC) and subcritical fluids near critical region and far from the critical region. The results demonstrated that the frequency of C=O stretching vibration of the monomer and dimer, the molar absorptivities of monomer and dimer, and the monomer-dimer equilibrium were very sensitive to pressure in the subcritical fluids and supercritical fluids in the critical region, especially as the pressure approached the phase boundary, while the effect of pressure on these properties outside the critical region was very limited. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：17 / 24

页数：8

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