当前位置: X-MOL 学术Catal. Today › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Fenton-based processes for the regeneration of catalytic adsorbents
Catalysis Today ( IF 5.3 ) Pub Date : 2017-10-29 , DOI: 10.1016/j.cattod.2017.10.030
A.M. Díez , M.A. Sanromán , M. Pazos

In the present study, natural phyllosilicate clays, Illite and Montmorillonite, were stablished as efficient adsorbents for the removal of the ionic liquid 1-butyl, 2,3-dimethyl imidazolium chloride, achieving, respectively, 14 and 25 mg/g of adsorption. In addition, the regeneration of both adsorbents was hereby firstly performed by Fenton-based processes, using the catalytic action of the iron naturally present in clays. Two different reactor configurations, with regard to the ratio of adsorbent to liquid phase, were tested: fluidized and fixed bed reactors. The desorption equilibrium was the main limiting factor for the effective regeneration of the Illite clay by electro-Fenton process in the fluidized bed reactor. On the other hand, the fixed bed reactor, based on electrokinetic-Fenton phenomenon, proved to be suitable for the regeneration of the Montmorillonite clay and it would be an appropriate solution for the implementation of adsorbent regeneration by Fenton-based technology at large adsorbent/solution ratios. Both reactor configurations were suitable for the adsorbents regeneration, and 80% of ionic liquid degradation has been accomplished. Additionally, the adsorption capability of both clays was confirmed after the regeneration process, achieving almost the same initial uptake.



中文翻译:

基于Fenton的催化吸附剂再生方法

在本研究中,天然页硅酸盐粘土,伊利石和蒙脱石被认为是去除离子液体1-丁基,2,3-二甲基咪唑鎓氯化物的有效吸附剂,分别达到14和25 mg / g的吸附量。另外,两种吸附剂的再生首先利用天然存在于粘土中的铁的催化作用,通过基于Fenton的方法进行。就吸附剂与液相之比而言,测试了两种不同的反应器配置:流化床和固定床反应器。解吸平衡是在流化床反应器中通过电芬顿法有效再生伊利石粘土的主要限制因素。另一方面,基于电动芬顿现象的固定床反应器 被证明适合于蒙脱土的再生,并且将是基于芬顿技术在大的吸附剂/溶液比下实现吸附剂再生的合适解决方案。两种反应器配置均适合吸附剂再生,并且已完成80%的离子液体降解。另外,在再生过程之后,证实了两种粘土的吸附能力,实现了几乎相同的初始吸收。

更新日期:2017-10-29
down
wechat
bug