Formation of FeCl(2)/NaCl-nanoparticles in supercritical water investigated by molecular dynamics simulations: nucleation rates.
Formation of FeCl(2)/NaCl-nanoparticles in supercritical water investigated by molecular dynamics simulations: nucleation rates.
复制标题
通过分子动力学模拟研究超临界水中 FeCl(2)/NaCl 纳米颗粒的形成:成核速率
DOI:
10.1039/b805725g
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发表时间:
2008
期刊:
影响因子:
--
通讯作者:
B. Kvamme
中科院分区:
文献类型:
--
作者:
N. Lümmen;B. Kvamme
Nucleation and growth of FeCl2 in supercritical water containing NaCl at different state points between temperatures of 798 and 873 K and system densities between 0.24 and 0.14 g cm−3 have been studied by molecular dynamics simulations. The number of NaCl ion pairs was chosen to simulate particle formation in seawater and brine of higher salinity. Rigid SPC/E water was used to model the water molecules while a combination of Coulomb and Lennard-Jones potentials was used for the ions. Two different methods for determination of nucleation rates are applied and their results compared. We find decreasing nucleation rates with both increasing temperature and decreasing system density. Our results are also compared to those we recently obtained in an investigation of pure FeCl2 from supercritical water. We find both increasing nucleation rates and a decreasing size of the critical cluster with increasing amount of NaCl.
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