摘要
提出了一种以Mg O为吸附剂,以化学环法分解氯化铵的工艺为核心,将纯碱与氯乙烯两大过程集成为一个无CO2排放又无电解过程的清洁生产新工艺。使用HSC热力学软件分析了Mg O与NH4Cl两步反应分别释放NH3和HCl的可能性,并确定了释氨反应和释氯反应的温度、水氨物质的量比等相关条件。使用固定床装置对此过程进行了验证,并得到了较高的NH3和HCl的单程收率;评价了作为反应吸附剂的不同氧化镁的活性,粉末状轻质Mg O因为其比表面积和孔容的优势而活性最高;实验进一步验证了Mg O吸附剂在多次循环利用下的表现,结果表明其在11次的循环利用后仍然有较高的活性。
Based on the chemical looping decomposition of NH4 Cl, 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 Mg O for NH4 Cl 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 NH4 Cl is above 0.6. Experiments were carried out in a fixed-bed reactor, and various Mg O absorbents were screened. The results show that high yield of NH3 and HCl can be obtained, and the powdered light Mg O has the highest activity, while the powdered heavy Mg O has the lowest, which is mainly affected by their morphological properties, such as surface area and pore structure. Moreover, Mg O absorbents can be repeatedly used for several times with relatively high activity.
出处
《化学反应工程与工艺》
CAS
CSCD
北大核心
2015年第5期449-458,共10页
Chemical Reaction Engineering and Technology
关键词
氯化铵
氧化镁
化学环
纯碱
氯乙烯
过程集成
ammonium chloride
magnesium oxide
chemical looping
soda ash
chlorethylene
process integration
作者简介
罗蓓尔（1989-），女，硕士研究生。
成有为（1977-），男，副教授，通讯联系人。E-mail：ywcheng@zju．edu．cn。
