姜涛,张小岗,李永旺,牛玉琴,钟炳.超临界正十二烷-醇溶液体系的Monte Carlo模拟[J].分子催化,1999,(5): |
超临界正十二烷-醇溶液体系的Monte Carlo模拟 |
Monte Carlo Simulations of Supercritical Dodecane and Alcohol System |
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DOI: |
中文关键词: 超临界流体,MonteCarlo模拟,径向分布函数,低碳醇,正十二烷 |
英文关键词: |
基金项目: |
姜涛 张小岗 李永旺 牛玉琴 钟炳 |
中国科学院山西煤炭化学研究所煤转化国家重点实验室!太原030001(姜涛,张小岗,李永旺,牛玉琴) ,中国科学院山西(钟炳)
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中文摘要: |
用MonteCarlo 方法研究了超临界正十二烷-醇溶液的分子质心C- C、C- O原子间的径向分布函数. 结果表明, 在临界压力下, 在临界温度附近改变温度时, 十二烷-十二烷分子质心C- C原子间的径向分布函数变化不大, 即温度对十二烷分子间聚集的影响不明显. 在临界温度下, 当压力在临界压力附近变化时, 十二烷-十二烷分子质心C- C原子间的径向分布函数发生了显著变化, 十二烷分子在临界压力以下聚集最强. 在临界状态下, 对于十二烷分别与甲醇、乙醇、正丙醇和异丁醇构成的溶液, 十二烷在异丁醇周围的聚集最强, 在乙醇周围的聚集次之, 在甲醇和正丙醇周围聚集较弱. |
英文摘要: |
C-O and C-C radial distribution functions for solutions composed of supercritical dodecane and lower alcohols were studied by Monte Carlo method. At critical pressure, the C-C radial distribution function for dodecane\|dodecane system did not change remarkably with temperature near critical temperature, i.e. temperature did not affect the aggregation of dodecane molecules. At critical temperature, the C-C radial distribution function for dodecane\|dodecane system changed greatly with pressure near critical pressure. The dodecane molecules gathered very strongly at sub\|critical pressure. Under critical condition, dodecane\|isobutanol system possesses the strongest aggregation among the systems composed of dodecane with methanol, ethanol, n\|propanol, isobutanol, respectively. |
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