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[目的]研究玉米秸秆制备活性炭的吸附性能。[方法]以玉米秸秆制备的粒状活性炭为研究对象,搭建了吸附性能模拟试验装置,采用静态重量法测试制备活性炭对甲醇的吸附能力。[结果]床内盛装同种试样炭料在同一吸附温度下,新型吸附床A(内置膜片式刺孔吸附质管)的吸附性能明显优于未进行结构改进的吸附床B,达到相同吸附量0.22 g/g时,A床吸附提前5 min;床内盛装不同粒径与同一粒径活性炭的对比试验,在同一吸附温度下,其吸附性能明显优于盛装同一粒径的,达到同一吸附量0.22 g/g时,吸附提前16 min;床内活性炭添加适量石墨粉可增强导热、强化吸附性能,最佳添加量为活性炭总量的20%;改性活性炭试验中,相比试验对照组经弱酸性溶液浸泡后活性炭可增强吸附性能,达到平衡吸附量87.1%时吸附提前了3 min。[结论]试验研究了吸附床结构、吸附床内盛装粒径不同炭粒、活性炭中添加不同量的石墨粉以及改性活性炭等对系统吸附性能的影响。
[Objective] The research aimed to study the adsorption properties of activated carbon prepared from corn stalks. [Method] The granular activated carbon prepared from corn stalks was taken as the research object. A simulation device for adsorption performance was set up. The adsorption capacity of activated carbon to methanol was tested by static gravimetric method. [Result] Under the same adsorption temperature, the adsorption performance of the new bed A (built-in membrane-type punctured adsorbent tube) was significantly better than that of the adsorbent bed B without structural improvement at the same adsorption temperature When the adsorption capacity was 0.22 g / g, the adsorption of bed A was 5 min earlier than that of the same size. The comparison test of the bed filled with different particle sizes and the same particle size activated carbon showed that the adsorption performance was better than that of the same particle size at the same adsorption temperature Adsorption rate of 0.22 g / g, the adsorption 16 min early; activated carbon added appropriate amount of graphite bed can enhance thermal conductivity, enhanced adsorption properties, the optimum amount of 20% of the total amount of activated carbon; modified activated carbon test, compared with the experimental control Activated carbon can enhance the adsorption performance of the group after soaking in weak acid solution, and reached the adsorption advance of 3 min when the equilibrium adsorption capacity reaches 87.1%. [Conclusion] The effects of adsorption bed structure, adsorption bed containing different carbon particles, addition of different amount of graphite powder and modified activated carbon on the adsorption performance of the system were studied.