吸附气相甲醛活性炭的选型研究  

Selecting activated carbon for removing formaldehyde from air

作　　者：林莉莉[1] 邱兆富[1] 韩晓琳[1] 叶兴长 刘友良 张巍[1] 应维琪[1] 

机构地区：[1]华东理工大学资源与环境工程学院,国家环境保护化工过程环境风险评价与控制重点实验室,上海200237 [2]上海兴长活性炭有限公司,上海201803

出　　处：《环境污染与防治》2013年第12期19-25,共7页Environmental Pollution & Control

基　　金：上海市自然科学基金资助项目(No.11ZR409400);中央高校基本科研业务费专项资金资助项目(No.WB1014038)

摘　　要：随着室内空气甲醛污染问题的日益凸显,便捷的活性炭甲醛吸附技术具备了巨大的应用前景。虽然已有大量文献报道了活性炭吸附空气中甲醛的有效性,但由于在实际应用中不同类型活性炭对甲醛的吸附性能差异较大,故而相应的选型研究仍有进一步开展的必要。通过静态吸附和动态穿透实验,对椰壳、果壳、煤质和木质4种材质的活性炭进行了气相甲醛吸附研究。结果表明,活性炭对甲醛的吸附符合Freundlich等温吸附方程。穿透实验中,椰壳炭表现出了最好的吸附性能,实际吸附容量和吸附容量利用率分别可达到9.88 mg/g和84.37%。在一定粒径范围内,小颗粒的活性炭具有较高的吸附能力,但粒径过小也会降低吸附效果,在本研究考察条件下,20-40目的椰壳炭是吸附甲醛的最佳选择。With the popularity of interior decoration, formaldehyde has become an important source of indoor pollution. Although the feasibility of formaldehyde removal by activated carbon has been proven in many publications, but selecting activated carbon for removing formaldehyde from air is still meaningful due to the great difference in ca-pacities of different type of activated carbons for formaldehyde. The static adsorption and dynamic breakthrough ex-periments were conducted with four types of activated carbons （coconut shell, fruit shell, coal and wood based car-bons） to investigate their removal capacities for formaldehyde from air. The results showed that activated carbon ad-sorption of formaldehyde fit the Freundlich isotherm equation. Coconut shell based carbon showed best adsorptive ca-pacity in the breakthrough experiment （its actual adsorptive capacity and adsorptive capacity utilization reached 9.88 mg/g and 84.37% respectively）. The smaller particle size of activated carbon results in higher adsorption capacity,but too small particle size can also lead to the decline of adsorptive capacity. In this study, coconut shell based carbon of 20-40 mesh size has the best capacity for removing formaldehyde from air.

关 键 词：活性炭 甲醛 炭型 粒径 吸附容量 

分 类 号：X701[环境科学与工程—环境工程]