Preparation of Benzene Adsorption Materials Using Waste Activated Alumina

A new type of benzene adsorption material was prepared by using the airtight heat treatment method.This method can directly transform the organic impurities of the activated alumina waste into carbon with adsorption capability.The microstructure and carbon content of materials were characterized by scanning electron microscope(SEM),X-ray diffraction(XRD),BET(Brunauer Emmett Teller) surface area analysis and elemental analysis.The influences of heat treatment temperature on the properties of the composite materials were discussed.The benzene adsorption capability of the material was investigated.The experimental results show that the optimal heat treatment process condition is airtight heating at 400 ℃ for 2 h.The resulting sample has carbon mass fraction of 3.57%,specific surface area of 234.70 m 2 /g,pore volume of 0.41 m 3 /g,and average pore size of 6.59 nm.The samples show excellent benzene adsorption capability with an adsorption rate of 21.80%.

用活性炭纤维吸附回收废气中的苯

采用活性炭纤维吸附回收装置处理含苯废气。对处理系统、工艺流程、系统运行参数以及运行安全保障作了具体的叙述。运行实践表明 ,采用该装置处理含苯废气 ,苯的吸附效率大于 97% ,每年可回收苯 2 70t,企业可得净收益 5 8.

吸附法净化低浓度废气实验研究

本文探讨了用活性炭吸附低浓度苯类废气时 ,空塔气速和气流在吸附层的接触时间对吸附过程的影响 ;研究了活性炭在已经吸附若干质量的苯类物质以后的吸附性能。据此绘制了空塔气速—吸附效率和活性炭含苯率—吸附效率等关系曲线 ,并进行了活性炭再生的研究。研究表明 :使用活性炭可以有效地净化低浓度苯类废气。

印染定形机废气治理技术

针对定形机废气中粉尘、VOCs、油烟处理效率低,及余热未充分利用等问题,设计一套“热回收-喷淋洗涤-静电除尘-活性炭吸附”四级的定形机废气处理新工艺。工艺后置活性炭吸附塔,不仅能去除VOCs,还能作为前三级工艺的保险装置,提高处理效率,确保废气达标排放。实际应用后,粉尘、油烟、VOCs可达标排放,处理效率达90%以上。每年回收热量折合标煤129.61 t,回收废油8.95 t,VOCs减排516.4 kg和粉尘21.63 t。