Impacts of different templates on the morphologies and sulfuration performances of nano ferric oxides

doi:10.16085/j.issn.1000-6613.2017-1340

Abstract

Abstract: Nano ferric oxides with different morphologies were successfully prepared via a facile hydrothermal method. Analytical grade Fe (NO₃)₃·9H₂O,CO (NH₂)₂ and different template agent including glycerol,cetyltrimethyl ammonium bromide (CTAB)and tartaric acid were employed as raw materials. X-ray diffraction (XRD),scanning electron microscope (SEM)and nitrogen adsorption-desorption isotherms (BET) were used to characterize the phase composition,morphologies and pore structure of as-prepared products. The results revealed that the obtained pure Fe₂O₃ crystals were spherical,rod-like or cuboid structures. Moreover,the template agent played an important role in controlling the shape and size of the products. The desulfurization behaviors were also investigated in a micro reactor. The three sorbents with different morphologies all showed excellent H₂S capture ability. Specifically,the sorbent used tartaric acid as template agent showed enhanced desulfurization performance than others,of which,the breakthrough time reached 350min,and the corresponding sulfur capacity was 11.5g/100g sorbent. In this paper,we prepared desulfurizer active group with different morphologies by adding template agent,which could increase the sulfuration properties,and provide new thoughts for high efficiency desulfurization.

Key words: nano ferric oxide, hydrothermal, surfactants, sulfuration, sorbents, morphology

摘要： 以Fe（NO₃）₃·9H₂O和CO（NH₂）₂为原料，添加不同模板剂，即丙三醇、十六烷基三甲基溴化铵（CTAB）和酒石酸，由水热反应制得纯相α-Fe₂O₃。采用X射线衍射分析（XRD）、扫描电子显微镜（SEM）、氮吸附（BET）表征手段对产物的物相组成、微观形貌及孔结构进行了分析与对比。结果表明，添加丙三醇、CTAB及酒石酸为模板剂后，分别得到具有棒状、球状及长方体形貌的α-Fe₂O₃。利用微型固定床硫化装置对不同模板剂制备的纳米α-Fe₂O₃分别进行脱除H₂S的实验，结果表明，添加3种模板剂后得到的脱硫剂都具有较高的硫化性能。其中，添加酒石酸得到的α-Fe₂O₃的孔隙结构更加丰富，其硫化性能要优于另外两种，穿透时间可达到350min，硫容为11.5g/100g。本文通过添加不同的模板剂，制备得到了具有不同形貌的脱硫剂活性组分，提高了硫化性能，为实现脱硫剂高效脱硫提供了思路。

关键词: 纳米氧化铁, 水热, 表面活性剂, 硫化, 吸附剂, 形貌

CLC Number:

TQ02

SHI Lei, FENG Yu, LI Yang, ZHANG Shuaiguo, WU Mengmeng, MI Jie. Impacts of different templates on the morphologies and sulfuration performances of nano ferric oxides[J]. Chemical Industry and Engineering Progress, 2018, 37(05): 1831-1836.

史磊, 冯宇, 李阳, 张帅国, 武蒙蒙, 米杰. 不同模板剂对纳米氧化铁形貌及硫化性能的影响[J]. 化工进展, 2018, 37(05): 1831-1836.

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