微波固相法制备ZnFe_2O_4脱硫剂及其脱硫性能研究  

Preparation of ZnFe_2O_4 desulfurizer by solid state reaction under microwave irradiation and study on its performance of removing sulfides

作　　者：曹宇[1] 武蒙蒙[1] 张瑞妮[1] 米杰[1] 

机构地区：[1]太原理工大学煤科学与技术教育部和山西省重点实验室,山西太原030024

出　　处：《能源化工》2016年第1期23-31,共9页Energy Chemical Industry

基　　金：国家自然科学基金项目(51272170/21506143)

摘　　要：采用乙酸锌、硝酸铁以及乙二酸为原料合成铁酸锌前驱体,以红土为黏结剂,采用微波固相法合成铁酸锌脱硫剂。通过单因素法考察球磨时间、焙烧温度、焙烧时间以及活性组分含量对脱硫剂脱硫性能的影响,同时利用响应面法对脱硫剂制备条件进行优化得到最佳制备条件。采用X射线衍射(XRD)、氮吸附(BET)方法对脱硫剂的新鲜样和硫化样的物相组成、结构、孔结构进行表征。铁酸锌脱硫剂的最佳制备条件为:活性组分质量分数30%、焙烧温度505℃、焙烧时间65 min、球磨时间30 min;此条件下制备的脱硫剂脱硫效果好,硫容达到8.7%,脱硫效率为72.07%。Zinc ferrite based sorbent is prepared by the precursor composed of the zinc acetate, ferric nitrate and oxalic acid via a low-temperature solid-state reaction method under microwave irradiation with ball-milling process and red earth as binder. The influ- ences of active component content, calcination time, calcination temperature and milling time on the performance of removing sulfides are investigated by the single factor experiment. The result of the experiment based on the single factor method is further optimized with the response surface method and the optimal preparation parameters of the desulfurizer are obtained. The phase composition and struc- ture of sorbents before and after desulfurization are characterized by X-ray diffraction, and their pore structures are measured by N2 adsorption-desorption method. The optimal prepared conditions of absorbent are obtained as follows ： mass fraction of active component is 30%, calcination temperature is 505℃, and the calcination and milling time is 65 min and 30 rain, respectively. The zinc ferrite based sorbent prepared under the mentioned conditions shows best performance of removing sulfides, the maximum sulfur capacity is 8.7%, and the sulfide removal efficiency is 72. 07%.

关 键 词：脱硫 微波固相法 铁酸锌 响应面法 硫容 脱硫效率 

分 类 号：TQ546.5[化学工程—煤化学工程]