高温高压的流动溶液内矿物-水反应动力学研究

本文着重介绍高温高压下开放流动体系内矿物-水反应动力学的最新研究成果。在研究了连续流动体系中方解石-水的反应速度方程后又在稳态操作的化学动力学实验中发现了偶存于其中的非稳态动力学过程。同时用轴向弥散模型和叠层反应器研究了萤石和钠长石反应动力学机理。本文还研究了不同温压、流速、介质和不同的溶液性质对反应速度的影响及控制因素。     

地球内部物质运动的物理学和化学问题研讨会简讯

地球内部物质运动的物理学和化学问题研讨会于 2 0 0 1年 1月 2 0日在中国高等科学技术中心举行 .出席研讨会的有来自南开大学、北京大学、中国科学院高能物理研究所、化学研究所、国家地震局地质研究所、中国地质学会、中国地质科学院地质研究所、中国地质科学院矿产资源研究所、国土资源部(原地质矿产部 )地球化学动力学开放实验室等单位的 16名代表 .此次研讨会同时是国土资源部地球化学动力学开放实验室学术年会 .研讨会不仅安排了学术报告 ,而且在发言过程中展开了热烈的讨论 ,内容涉及地球内部极端条件下的物质基本性质 ,高温高压对物…     

提示地球奥秘

地球形成于46亿年前,为太阳系第三行星,她是太阳系中唯一有生命存在的星球,是一个“活”的星球。地球不仅从外界接收太阳的光和热,地球内部还聚集着巨大的热和能量;有磁场;地球内部物质在不断地运动、不断地进行着物质交换……这样的过程预期还能进行45亿年。地球正当中年。     

KINETICS STUDIES OF MINERAL-WATER REACTIONS IN HYDROTHERMAL FLOW SYSTEMS AT ELEVATED TEMPERATURES AND PRESSURES

This paper describes new experimental results on mlneral-water reaction kinetics obtained in plug-flow systems at high temperatures and pressures. As an example, the rates of reaction between calcite, fluorite, albite and water in the continuous flowing system have been measured in three separate studies. All experiments are carried out by suspending a sample bag in the plug-flow vessel, by pumping water at carefully controlled rates through the vessel, and by collecting and analyzing the reacted solution. In addition, the reaction mechanisms of fluorite and albite in a packed bed reactor have been studied with the aid of an axial dispersion model. The main factors controlling the effective dissolution rate with respect to temperature, solvent flow rate, and chemistry of the input solutions have been evaluated. It is also found that a non-steady state process is, in some cases, still observed, even under conditions where steady state conditions should have been attained. These results provide informatio