In-situ Raman spectral investigation into hydrogen bonding characteristics of supercritical water

被引：11

作者：

Zhu, Shixing ^{[1
]}

Jin, Hui ^{[1
]}

Ou, Zhisong ^{[1
]}

Song, Mengmeng ^{[1
]}

Chen, Jia ^{[1
]}

Guo, Liejin ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, State Key Lab Multiphase Flow Power Engn SKLMF, 28Xianning West Rd, Xian 710049, Shaanxi, Peoples R China

来源：

JOURNAL OF MOLECULAR LIQUIDS | 2022年 / 355卷

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

Supercritical water; Raman spectroscopy; Hydrogen bonding; LIQUID; SPECTROSCOPY;

D O I：

10.1016/j.molliq.2022.118965

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：

Supercritical water is widely used as a superior reactant or solvent in the gasification of biomass and coal. Research shows that hydrogen bonding could reduce the potential energy of chemical reaction between water molecules and organic molecules. However, it is still uncertain whether hydrogen bonds exist in supercritical water at the temperature of coal gasification process (above 873 K). In this paper, a high temperature and pressure visualization platform (T-max = 1013 K) was built. The hydrogen bonding degree of water from liquid to supercritical is obtained in a wider temperature range. It is a remarkable fact that hydrogen bonds still exist in supercritical water even at temperatures as high as 1013 K. These hydrogen bonds mainly exist in the form of dimer and trimer, which is a significant factor that can't be ignored in the study of gasification mechanism of coal and organic matter in supercritical water. (C) 2022 Elsevier B.V. All rights reserved.

引用

页数：8

共 44 条

[1] Hydrogen bonding and Raman, IR, and 2D-IR spectroscopy of dilute HOD in liquid D2O [J].