载体对超临界水浸渍法制备的中温煤气脱硫剂性能的影响  

Effects of Carbon-support in Sorbents Prepared by Supercritical Water Impregnation on Its Desulfurization in Hot Coal Gas

作　　者：邱彪[1] 王建成[1] 韩丽娜[1,2] 常丽萍[1] 鲍卫仁[1] 

机构地区：[1]太原理工大学煤科学与技术教育部和山西省重点实验室,山西太原030024 [2]太原理工大学材料科学与工程学院,山西太原030024

出　　处：《化学反应工程与工艺》2011年第3期257-261,共5页Chemical Reaction Engineering and Technology

基　　金：国家自然科学基金(No 20976117);山西省自然科学基金(No 2010021008-1;2010011014-3)

摘　　要：以不同活性炭(AC-1、AC-2)和炭化料(CC)为载体,利用超临界水浸溃法制备MnOx/AC系列脱硫剂。采用电感耦合等离子光谱发生仪(ICP-AES)、X射线衍射仪(XRD)和N_2吸附仪等测试手段,对活性组分上载量、脱硫剂的物相组成、比表面积和孔容进行了表征。在固定床上进行脱硫剂的活性评价,考察了制备条件对硫化性能的影响。研究结果表明,比表面积最大的活性炭AC-1脱硫性能最好,可将气体中的H_2S脱除到0.1 ppm以下,金属利用率最高可以达到90 96%。以AC-2的炭化料为载体在制备负载型MnOx/AC脱硫剂的同时,还可以活化炭化料,有效提高其比表面积,提高脱硫剂的脱硫活性。在380℃,25 Mpa,前驱体溶液浓度为10%,停留时间为30 min的条件下制得的脱硫剂T380t30W10Mn/AC-1的脱硫活性最佳。Sorbents were prepared by depositing manganese oxide particles onto different active carbon （AC-1, AC-2） and carbonization carbon （CC） using supercritical water impregnation. Morphology and structure, loading amounts of metal in sorbents, pore volume and surface area were characterized by X-ray diffraction （XRD）, inductively coupled plasma atomic emission spectrometry （ICP-AES） and nitrogen sorption measurements. The sulfidation tests were performed using a fixed-bed reactor. The effects of the preparation conditions on sulfidation properties of sorbents were investigated. The results showed that the sorbent prepared by support AC-1 with highest surface area had the highest desulfurization activity and its highest metal utilization is 90.96%. During sorbent preparation by supercritical water impregnation, the carbonization carbon support can be activated and the surface area is enhanced, which will cause the improving of desuifurization activity. The properties of sorbent can be improved by the changing support,time and concentration of precursor solution in the process of supercriticai water impregnation. T380t30W10Mn/AC-1 obtained in the conditions of 380 ℃, 25 Mpa, 10% concentration of precursor solution and residence time of 30 min is optimum.

关 键 词：中温脱硫 炭载体 MnOx/AC脱硫剂 超临界水浸渍 

分 类 号：TQ546[化学工程—煤化学工程]