天然气与硫酸盐热化学还原反应的模拟实验研究

为探讨天然气中高含量硫化氢形成的化学机制，利用高温高压反应装置，对天然气与固态硫酸钙反应体系进行了热模拟实验研究。使用气相色谱仪、微库仑仪、傅里叶变换红外光谱仪和X射线衍射仪对产物进行了分析，探讨了硫酸盐热化学还原反应的热力学特征，并进行了反应动力学研究。结果表明，高温下天然气与固态硫酸钙可以发生反应，产物主要为硫化氢、二氧化碳、碳酸钙、水和炭。热力学研究表明，天然气与固态硫酸钙的反应可行，升高温度对反应有利，同一温度下长链烷烃与固态硫酸钙发生反应的可能性要比短链烷烃大。根据动力学模型得到反应活化能为96.824kJ/mol。

Simulation experiments on thermochemical sulfate reduction using natural gas

To study the chemical mechanisms of the formation of high H2S concentrations in natural gas, thermal simulation experiments on the reaction between natural gas and solid calcium sulfate were carried out in an autoclave under high temperature and high pressure. Properties of the reaction products were analyzed by gas chromatogram, microcoulometry, Fourier transform infrared spectrum and X-ray diffraction methods. Thermodynamic characteristics of thermochemical sulfate reduction (TSR) and the reaction kinetics were investigated. It was found that natural gas could react with solid calcium sulfate under high temperatures, and that hydrogen sulfide, carbon dioxide, calcium carbonate, water and carbon are the main products. TSR of natural gas with solid calcium sulfate is thermodynamically possible and high temperature is favorable to the reaction. The reaction with long chain hydrocarbons can take place more easily than short chain ones. According to the reaction model, the activation energy of the reaction is 96.824kJ/mol.