ZrO_(2)对Co-Mo耐硫变换催化剂性能的影响  

EFFECT OF ZrO_(2) ON PERFORMANCE OF Co-Mo BASED SULFUR TOLERANT SHIFT CATALYST

作　　者：王晓帆 康洪权 卢祥之 白志敏[1] 王民[1] 余汉涛[1] WANG Xiaofan;KANG Hongquan;LU Xiangzhi;BAI Zhimin;WANG Min;YU Hantao(Research Institute of Qilu Branch Co.,SINOPEC,Zibo Shandong 255400)

机构地区：[1]中国石化齐鲁分公司研究院,山东淄博255400

出　　处：《齐鲁石油化工》2024年第3期180-185,共6页Qilu Petrochemical Technology

摘　　要：本文在Al_(2)O_(3)负载的Co-Mo耐硫变换催化剂中引入ZrO_(2)作为第二载体,制备了一系列ZrO_(2)改性的Co-Mo耐硫变换催化剂(ZrCoMo/Al_(2)O_(3)),通过N_(2)吸脱附、X射线衍射(XRD)、X射线光电子能谱(XPS)、程序升温还原(H_(2)-TPR)和程序升温硫化(TPS)对催化剂的物化性质进行表征,探究了ZrO_(2)的引入对催化剂变换性能的影响。结果表明:ZrO_(2)与活性中心Mo产生电子相互作用,使得Mo表面电子富集,硫化后易于生成钼硫化物活性相,抑制MoS_(2)相的形成,进而明显抑制了甲烷化副反应。综合变换活性与抗甲烷化性能,ZrO_(2)的适宜添加量为质量分数4%。A series of modified Co-Mo sulfur-tolerant shift catalysts(ZrCoMo/Al_2O_3) with the introduction of ZrO_(2) as a secondary support to Al_2O_3-supported catalysts were prepared in this study.The physicochemical properties of catalysts were characterized by means of N_(2) adsorption,X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),hydrogen temperature programmed reduction(H_2-TPR) and temperature programmed sulfurization(TPS),the impact of introduction of ZrO_(2) on the catalyst′s shift conversion performance were explored.The results showed that ZrO_(2) electronically interacts with the active center Mo,enriching surface electrons and facilitating the formation of molybdenum sulfide active phase after the sulfidation treatment,which suppressed the formation of MoS_(2) phase and obviously reduced the methanation side reaction.Considering both shift activity and methanation resistance,the optimal dosage of ZrO_(2) was 4 wt%.

关 键 词：耐硫变换 二氧化锆 复合载体 催化剂 

分 类 号：TQ032.4[化学工程]