氨浸渣高温脱除硫化氢的性能及可再生性  

Performance and Regenerable Evaluation of OMNLR-based Sorbent for H_2S Removal at High Temperatue

作　　者：陈冬[1] 余超[1] 陈天虎[1] 李石磊[1] 刘海波[1] 朱承驻[1] 邹雪华[1] 

机构地区：[1]合肥工业大学资源与环境工程学院,纳米矿物与环境材料实验室,合肥230009

出　　处：《硅酸盐学报》2015年第8期1167-1171,共5页Journal of The Chinese Ceramic Society

基　　金：国家自然基金(41202021)资助项目

摘　　要：高温煤气脱硫是洁净煤研发的关键技术之一。实验考察了大洋锰结核氨浸渣脱硫剂粒径、反应温度、气速对脱硫效果的影响,并利用X射线衍射、X射线荧光等手段对脱硫剂及脱硫产物进行表征,同时进行了脱硫剂的再生反应研究,以探索热处理氨浸渣高温脱硫和再生反应机理。结果表明:氨浸渣热处理产物为Mn(Fe)O,其最佳反应温度为700℃,最佳气速为40 m L/min,一次脱硫容量可达126.0 mg/g(以1 g脱硫剂计);脱硫剂可再生为方铁锰矿,且经过9次再生后总脱硫容量可达1 233.2 mg/g;同时发现高温脱硫作用除了Mn(Fe)O与硫化氢的硫化反应外,还存在硫化产物Mn(Fe)S对硫化氢的催化裂解次反应。The high-temperature removal of hydrogen sulfide from coal-derived fuel gases is a coal cleaning technique. This paper was to investigate the performance of ocean manganese nodule leached residue （OMNLR） in high-temperature coal gas desulfurization. The effects of particle size, reaction temperature and gas speed in a fixed bed reactor on the performance of OMNLR in high-temperature coal gas desulfurization were investigated. The regeneration of this sorbent was also evaluated. The raw sorbent material, desulfurization and regeneration products were characterized by X-ray diffraction and X-ray fluorescence to clarify the mechanism of high-temperature desulfurization and regeneration. The experimental results show that when the optimal reaction temperature is 700℃ and the promising air speed is 40 mL/min, the desulfurization capacity is 126.0 mg/g （based on 1 g OMNLR） in the first reaction. The total sorption capacity after 9-time regenerations can reach 1 233.2 mg/g. It is also revealed that the desulfurization at high temperatures results from manganese-iron composite oxides and thermal cracking of hydrogen sulfide in sulfidation product.

关 键 词：大洋锰结核氨浸渣 高温脱硫 热处理 脱硫容量 再生 

分 类 号：TG09[金属学及工艺]