Study of the Reaction Mechanisms of Hydrocarbons with Calcium Sulfate

In this article, thermal simulation experiments on the reactions in TSR process (CH₄-CaSO₄, C₂H₆-CaSO₄, and C₃H₈-CaSO₄) were carried out using autoclave at high temperature and high pressure. The gaseous and solid products were characterized by some advanced analytical methods. On the basis of the experimental results, the reaction mechanisms were tentatively investigated. It was found that three reactions can proceed to produce H₂S, H₂O, and CaCO₃ as the main products at the temperature range of 450–700°C. The high simulation temperatures also resulted in the production of undesired material. The results obtained in this article can provide important information for the investigation on the natural gas destruction in gas reservoirs.

Keywords:

• reaction mechanisms
• thermal simulation experiments
• TSR

Acknowledgments

This work was supported by National Natural Science Foundation of China (No. 40172047) and National Major Fundamental Research & Development Project (No. G19990433).