熔融碱吸收高浓度CFC-12废气的研究

Research on Absorption of Exhaust Gas Containing High Concentration CFC-12 by Molten Alkali

用熔融NaOH对高浓度CFC-12废气的吸收进行实验研究,分别考察了进气浓度、水蒸气的存在、反应温度、NaOH用量、进气流量对吸收效率的影响。结果表明：在有水蒸气,反应温度高于318℃,NaOH用量大于60 g,气体流量25 mL/min的条件下,熔融NaOH对浓度0.1%-1%之间的CFC-12废气吸收效率在99%以上,CFC-12的分解产物被熔融NaOH吸收,减少了二次污染。并且在一定的NaOH用量,进气流量,进气浓度条件下,有水蒸气和提高反应温度可以大幅度的提高吸收效率。

The absorption of exhausted gas containing high concentration CFC-12 using molten alkali is investigated.The effects of concentration of inflow gas,water vapour,reaction temperature,dosage of NaOH,velocity of flow are investigated.The experimental results show that with the presence of water vapour,higher reaction temperature（318 ℃）,higher dosage of NaOH（60 g）,velocity of gas flow（25 mL/min）,the absorbing effect is superior of 99% for exhausted gas containing 0.1%～1% CFC-12.The decomposed products of CFC-12 are absorbed by molten alkali.When dosage of NaOH,velocity of flow,concentration of flow are invariability,absorbing efficiency is enhanced notably along with water vapour and higher reaction temperature.