Abstract：Based on the chemical looping decomposition of NH4Cl, soda ash and vinyl chloride processes can be integrated as a new clean process with no CO2 emission and free of electrolysis. Thermodynamic analysis (with HSC software) using MgO for NH4Cl two-step decomposition reaction to release NH3 and HCl was conducted. The calculation results verified the feasibility of the process, and the optimum conditions were found to be as follows: 350 ℃ for releasing NH3 reaction, 570 ℃ for releasing HCl reaction, the molar ratio of water vapor to NH4Cl is above 0.6. Experiments were carried out in a fixed-bed reactor, and various MgO absorbents were screened. The results show that high yield of NH3 and HCl can be obtained, and the powdered light MgO has the highest activity, while the powdered heavy MgO has the lowest, which is mainly affected by their morphological properties, such as surface area and pore structure. Moreover, MgO absorbents can be repeatedly used for several times with relatively high activity.
Luo Bei’er,Zhu Qibin,Cheng Youwei et al. The Integrated Cleaning Process of Soda and Vinyl Chloride on the Chemical Looping of NH4Cl Decomposition[J]. 化学反应工程与工艺, 2015, 31(5): 449-458.
