Regeneration of Fe_(2)O_(3)-based high-temperature coal gas desulfurization sorbent in atmosphere with sulfur dioxide  

作　　者：Ruizhuang ZHAO Ju SHANGGUAN Yanru LOU Jin SONG Jie MI Huiling FAN 

机构地区：[1]Key Laboratory of Coal Science and Technology,(Ministry of Education and Shanxi Province),Taiyuan University of Technology,Taiyuan 030024,China

出　　处：《Frontiers of Chemical Science and Engineering》2010年第4期423-428,共6页化学科学与工程前沿（英文版）

基　　金：supported by the National Basic Research Program of China(Grant No.2005CB221203);the Shanxi Province Key Technologies R&D Program(No.20080322035).

摘　　要：Regeneration of a high-temperature coal gas desulfurization sorbent is a key technology in its industrial applications.A Fe_(2)O_(3)-based high-temperature coal gas desulfurizer was prepared using red mud from steel factory.The influences of regeneration temperature,space velocity and regeneration gas concentration in SO_(2) atmosphere on regeneration performances of the desulfurization sorbent were tested in a fixed bed reactor.The changes of phase and the composition of the Fe_(2)O_(3)-based high-temperature coal gas desulfurization sorbent before and after regeneration were examined by X-ray diffraction(XRD)and X-ray Photoelectron spectroscopy(XPS),and the changes of pore structure were characterized by the mercury intrusion method.The results show that the major products are Fe3O4 and elemental sulfur;the influences of regeneration temperature,space velocity and SO_(2) concentration in inlet on regeneration performances and the changes of pore structure of the desulfurization sorbent before and after regeneration are visible.The desulfurization sorbent cannot be regenerated at 500℃ in SO_(2) atmosphere.Within the range of 600℃-800℃,the time of regeneration becomes shorter,and the regeneration conversion increases as the temperature rises.The time of regeneration also becomes shorter,and the elemental sulfur content of tail gas increases as the SO_(2) concentration in inlet is increased.The increase in space velocity enhances the reactive course;the best VSP is 6000 h^(-1) for regeneration conversion.At 800℃,20 vol-%SO_(2) and 6000 h^(-1),the regeneration conversion can reach nearly to 90%.

关 键 词：high-temperature coal gas Fe_(2)O_(3)desulfurization sorbent SO_(2)atmosphere regeneration behaviors sulfur recovery 

分 类 号：TG1[金属学及工艺—金属学]