Analysis of Toluene: Removal of toluene from the air s tream using a bed made of metal-organic frameworks adsorbent

A. Imani, Mohammad Reza Rezaei Kahkha, Rouhollah Parvari, M. Faraji, A. Faghihi-Zarandi
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Abstract

Toluene is one of the most dangerous and, simultaneously, the most consumed substances in various factories. Toluene strongly affects the central nervous system. The numerous side effects caused by exposure to toluene indicate the removal of toluene vapours from the air in the workplace. This study aims to use the removal of toluene vapours from the air using a Fe-MOFs metal-organic substrate for the first time in the world and to investigate efficient methods to increase the efficiency of removing toluene vapours from the air. This experimental study was carried out on a laboratory scale. After the iron metal-organic framework (Fe-MOFs) was synthesized, the components affecting the adsorption rate, such as reaction time (5-20 min), initial concentration (100-400 mg L-1), adsorbent amount, and temperature (25-80oC) were analyzed and optimized. Then, the efficiency of removing toluene vapours from the air was determined using a gas chromatography device. The absorption capacity of toluene was obtained by the desired adsorbent, 337.2 mg g-1. Also, the effect of different parameters on toluene absorption was investigated and optimized. The maximum absorption for concentration (300 mg L-1), temperature (75oC), and contact time (160s)  obtained as 340 mg g-1, 331 mg g-1, and 325 mg g-1, respectively. 
甲苯分析:用金属-有机框架吸附剂制成的床从气流中去除甲苯
甲苯是最危险的物质之一,同时也是各种工厂消耗最多的物质。甲苯强烈影响中枢神经系统。暴露于甲苯造成的许多副作用表明,在工作场所从空气中去除甲苯蒸气。本研究旨在首次利用fe - mof金属有机衬底去除空气中的甲苯蒸气,并探索提高空气中甲苯蒸气去除效率的有效方法。这项实验研究是在实验室规模上进行的。合成铁金属有机骨架(Fe-MOFs)后,对反应时间(5-20 min)、初始浓度(100-400 mg L-1)、吸附剂用量、温度(25-80℃)等因素对吸附速率的影响进行了分析和优化。然后,用气相色谱装置测定了从空气中去除甲苯蒸气的效率。该吸附剂对甲苯的吸附量为337.2 mg g-1。并对不同工艺参数对甲苯吸附性能的影响进行了研究和优化。浓度(300 mg L-1)、温度(75℃)和接触时间(160s)下的最大吸光度分别为340 mg g-1、331 mg g-1和325 mg g-1。
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