摘要
低浓度放射性14CO_2废气,越来越受到人们的关注,基于酸碱中和反应原理的碳酸化技术具有高效、快速的优点,是解决这一问题的主要技术之一。NaOH、CaO和Na_2CO_3等常见吸收剂,在单独使用时存在着吸收能力不足、用量大等问题,本研究模拟低浓度放射性14CO_2气体,制备了NaOH-Na_2CO_3和CaO-Na_2CO_3复合吸收剂。结果表明,NaOH-Na_2CO_3具有最高的吸收性能(1639.06 mg/mol),相比单一吸收剂,复合吸收剂明显提高了对CO_2的吸收能力;复合吸收剂在吸收过程中,除了气体直接与吸收剂组分发生反应以外,Na_2CO_3与CO_2反应生成的NaHCO_3,与NaOH或Ca(OH)_2反应生成Na_2CO_3或CaCO_3,促进对CO_2的吸收反应。
Owing to the high-efficiency and fast-curing, the carbonation technology based on the reactions between solid alkalis （e.g., NaOH, CaO and Na2CO3） and gaseous low- concentration CO2 is believed to be utilized in practice. In case of separate usage of solid alkalis, limited absorptive capability and vast consumption cannot be ignored. In this study, combined NaOH-Na2CO3 and CaO-Na2CO3 were prepared to absorb low-concentration CO2. The experimental results showed that the NaOH-Na2CO3 was the best absorbent with molar absorption capability of 1639.06 mg/mol. The combined absorbents had better absorbing capability than separate absorbents because of further reaction between NaOH or Ca（OH）2 and NaHCO3, which was first formed by Na2CO3 and CQ.
出处
《能源环境保护》
2016年第3期23-26,共4页
Energy Environmental Protection
