摘要
以Fe(NO_3)_3·9H_2O和CO(NH_2)_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-Fe_2O_3。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-Fe_2O_3。利用微型固定床硫化装置对不同模板剂制备的纳米α-Fe_2O_3分别进行脱除H_2S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-Fe_2O_3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。
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.
作者
史磊
冯宇
李阳
张帅国
武蒙蒙
米杰
SHI Lei;FENG Yu;LI Yang;ZHANG Shuaiguo;WU Mengmeng;MI Jie(Key Laboratory of Coal Science and Technology of Shanxi Province and Ministry of Education,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China)
出处
《化工进展》
EI
CAS
CSCD
北大核心
2018年第5期1831-1836,共6页
Chemical Industry and Engineering Progress
基金
国家自然科学基金项目(51272170)
关键词
纳米氧化铁
水热
表面活性剂
硫化
吸附剂
形貌
nano ferric oxide
hydrothermal
surfactants
sulfuration
sorbents
morphology
