Mineral Surface after Reaction with Aqueous Solution at High Temperatures and Pressures
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P574

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国家攀登计划,中国科学院资助项目,29673008,29673008,,


Mineral Surface after Reaction with Aqueous Solution at High Temperatures and Pressures
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    摘要:

    This work presents new experimental results on surface chemistry of reacting minerals and interface kinetics between mineral and aqueous solutions. These experiments were carried out using a flow reactor (packed bed reactor) of an open system as well as a continuous stirred tank reactor, CSTR. The authors measured reaction rates of such minerals as zeolite, albite and carbonate (rhodochrosite, dolomite) in various solutions, and tested corresponding mineral surface by using SEM, XPS, SIMS, etc. This paper mainly presents the experimental results of zeolite dissolution in water and in low pH solutions at room temperature, and dolomite dissolution at elevated temperatures. The results show that the release rates of Si, Al and Na of zeolite are different in most cases. The incongruent dissolution of zeolite is related to surface chemical modifications. The Na, Al and Si release rates for dissolution of albite and zeolite in water and various solutions were measured as a function of temperature, flow veloci

    Abstract:

    This work presents new experimental results on surface chemistry of reacting minerals and interface kinetics between mineral and aqueous solutions. These experiments were carried out using a flow reactor (packed bed reactor) of an open system as well as a continuous stirred tank reactor, CSTR. The authors measured reaction rates of such minerals as zeolite, albite and carbonate (rhodochrosite, dolomite) in various solutions, and tested corresponding mineral surface by using SEM, XPS, SIMS, etc. This paper mainly presents the experimental results of zeolite dissolution in water and in low pH solutions at room temperature, and dolomite dissolution at elevated temperatures. The results show that the release rates of Si, Al and Na of zeolite are different in most cases. The incongruent dissolution of zeolite is related to surface chemical modifications. The Na, Al and Si release rates for dissolution of albite and zeolite in water and various solutions were measured as a function of temperature, flow veloci

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ZHANG Xuetong, ZHANG Ronghua, HU Shumin and YU WenbinOpen Research Laboratory of Geochemical Kinetics, Chinese Academy of GeologicalSciences, Baiwanzhuang Road, Beijing .2000. Mineral Surface after Reaction with Aqueous Solution at High Temperatures and Pressures[J]. ACTA GEOLOGICA SINICA(English edition),74(2):406~411

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