H2O／O2气氛下半焦负载氧化铁高温煤气脱硫剂再生行为研究  

Regeneration Characteristics of Modified Semi-coke Supported(Fe_2O_3)Desulfurization Sorbents in H_2O/O_2

作　　者：吴宗泽[1] 米杰[1] 武蒙蒙[1] 于蒙[1] 上官炬[1] 樊惠玲[1] 

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

出　　处：《太原理工大学学报》2015年第1期22-28,共7页Journal of Taiyuan University of Technology

基　　金：国家自然科学基金资助项目:微波固相合成复合金属氧化物中高温煤气脱硫材料及其性能研究(51272170/21276172);太原理工大学人才引进基金项目资助(tyut-rc201350a)

摘　　要：以沉淀法制备半焦负载氧化铁高温煤气脱硫剂,在固定床反应装置上考察了温度、空速、水氧比对再生行为的影响,通过XRD,XPS,SET等测试手段对脱硫剂再生前后进行表征。结果表明,H2O/O2气氛下再生过程中尾气主要成分是H2S和SO2,并伴有单质硫生成,再生后脱硫剂主要组分是Fe2O3;较低的再生温度和较高的水氧比均有利于单质硫的生成,600℃,3 000h-1,和V(H2O)∶V(O2)=40∶1(φO2=2%)为水氧气氛下半焦负载氧化铁高温煤气脱硫剂的最佳再生条件,此条件对应的单质硫产率达到最大(44.4%);多次硫化/再生循环后,再生率都保持在较高水平(>98.5%),且机械强度逐渐递增,脱硫活性仍然保持较高水平。Iron oxide high temperature coal gas desulfurization sorbent supported by semi-coke was prepared with precipitation method. The influences of regeneration temperature, space veloci- ty and H2O/O2 ratio on regeneration performances were investigated in a fixed-bed quartz reac- tor. X-ray diffraction,X-ray photoelectron spectrometry, scanning electron microscopy and N2 adsorptions were used to identify changes in the physical and chemical properties of the sorbents be-fore and after regeneration. The results show that in the regeneration reaction FeS reacts with H2O/O2 mixed gases to produce Fe2O3, SO2, H2S and a number of sulfur. The optimum regeneration： regeneration temperature,H2O/O2 ratio and space velocity are 600℃,40 and 3000h^-1 respectively. The maximum elemental sulfur yield can achieve 44.4% under this condition and the sorbents can be kept high regeneration rate （〉98.5%）. In addition, the mechanical strength of sorbents increases gradually and the sulfidation activity is still in a high level.

关 键 词：高温煤气 氧化铁脱硫剂 再生 H2O/O2 气氛 

分 类 号：TQ546.5[化学工程—煤化学工程]