富钾正长岩水热分解生成沸石反应热力学

引用本文: 刘昶江, 马鸿文, 张盼. 富钾正长岩水热分解生成沸石反应热力学[J]. 物理化学学报, 2018, 34(2): 168-176. doi: 10.3866/PKU.WHXB201707111 shu

Citation: LIU Changjiang, MA Hongwen, ZHANG Pan. Thermodynamics of the Hydrothermal Decomposition Reaction of Potassic Syenite with Zeolite Formation[J]. Acta Physico-Chimica Sinica, 2018, 34(2): 168-176. doi: 10.3866/PKU.WHXB201707111 shu

富钾正长岩水热分解生成沸石反应热力学

1.
中国地质大学(北京)材料科学与工程学院, 北京 100083;
2.
昊青薪材(北京)技术有限公司, 北京 100083
基金项目:
中央高校基本科研业务项目（2652015371）和中国地质调查项目（12120113087700）资助

摘要: 以安徽某地富钾正长岩粉体为原料，研究其水热碱法分解生成沸石化合物的反应热力学。采用“聚合多面体模型”计算了几种沸石的热力学参数，结合矿物端员组分热力学数据及“混合电解质模型”，构建了富钾正长岩-NaOH-H₂O水热体系平衡热力学模型。反应Gibbs自由能计算结果表明，在160-300 ℃范围内，由富钾正长岩水热分解生成羟钙霞石、方沸石、P型、A型等沸石的反应可自发进行；通过OLI Analyzer 9.3软件对该体系不同条件下的相平衡进行模拟，预测了富钾正长岩水热碱法分解生成羟钙霞石、方沸石的反应条件。通过实验验证，生成的方沸石呈规则的四角三八面体晶型，粒径约50 μm；羟钙霞石呈柱状，长约20 μm，截面尺寸约500 nm-1 μm，K₂O溶出率97%以上。

关键词:

English

Thermodynamics of the Hydrothermal Decomposition Reaction of Potassic Syenite with Zeolite Formation

1.
School of Materials Science and Technology, China University of Geosciences, Beijing 100083, P. R. China;
2.
Blue Sky Technology Corporation, Beijing 100083, P. R. China
Received Date: 05 June 2017
Revised Date: 26 June 2017
Fund Project:
The project was supported by the Fundamental Research Funds for the Central Universities (2652015371) and China Geological Survey Project (12120113087700).

Abstract: The thermodynamics of hydrothermal decomposition reaction of potassic syenite,collected from Anhui province,China,with the formation of zeolites was studied in this work.The phase equilibrium model of the potassic syenite-NaOH-H₂O hydrothermal system was constructed by the combination of "mixed solvent electrolyte model" and thermodynamic data of mineral end-members,as well as zeolites species,which was calculated from the"polymer model".According to the Gibbs free energy of reaction,the decomposition of potassic syenite into hydroxycancrinite,analcime,zeolite P,and zeolite A occurs spontaneously within the temperature range of 160-300℃.The formation conditions of hydroxycancrinite and analcime were predicted from the simulation of phase equilibrium by OLI Analyzer 9.3 software.After experimental verification,analcime (regular tetragonal trisoctahedron,~50 μm) and hydroxycancrinite (columnar crystals,~20 μm in length,500 nm-1 μm in diameters) were respectively obtained with >97% K₂O leaching.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

富钾正长岩水热分解生成沸石反应热力学

English

Thermodynamics of the Hydrothermal Decomposition Reaction of Potassic Syenite with Zeolite Formation

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中国化学会秘书处

富钾正长岩水热分解生成沸石反应热力学

English

Thermodynamics of the Hydrothermal Decomposition Reaction of Potassic Syenite with Zeolite Formation

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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