磷助剂对K_2WO_4/Al_2O_3催化合成甲硫醇的影响  

Effects of Phosphorus Promoter on K_2WO_4/A1_2O_3 Catalysts for Synthesis of Methanethiol

作　　者：张元华[1] 袁成龙[1] 陈世萍[1] 李建军[1] 方维平[1] 杨意泉[2] 

机构地区：[1]厦门大学化学化工学院化学工程与生物工程系,福建厦门361005 [2]厦门大学化学化工学院化学系醇醚酯化工清洁生产国家工程实验室,福建厦门361005

出　　处：《石油化工》2012年第12期1357-1362,共6页Petrochemical Technology

摘　　要：采用溶胶凝胶法,并引入不同含量的磷助剂,制备了K_2WO_4/P_xAl_2O_3催化剂,采用XRD、N_2吸附-脱附、FTIR、原位吡啶吸附FTIR和NH_3/CO_2-TPD等技术,考察磷含量对催化剂结构和酸碱性质及催化甲醇与硫化氢反应性能的影响。表征结果显示,随磷含量(w)由0.5%增至4.0%,催化剂的比表面积变化不大,而平均孔径和孔体积略有增加,催化剂活性组分的晶粒变小;含磷助剂的催化剂表面不含B酸,随磷含量的增加,催化剂的表面酸强度先增强后减弱,而碱量降低;在磷含量为1%(w)时,催化剂的活性最高,比不含磷的催化剂高约2.3%。Phosphorus-promoted K2WO4/Al2O3 catalysts for the synthesis of methanethiol from methanol and H2S were prepared and characterized by means of BET, XRD, FTIR, in situ pyridine adsorption FTIR and NH3/CO2-TPD. The characterization results revealed that with the increase of the P content in the catalysts in the range from 0.5% to 4.0%（w）, the crystallite sizes of the catalysts decreased, the pore volume and average pore size increased, while the specific surface area showed little changing. With increasing the P dosage, the acidity of the catalysts first increased and then decreased, while the basicity decreased. The highest catalytic activity of the catalyst in the reaction can be obtained when the P content in the catalyst is 1%（w）, with the catalytic activity being 2.3% higher than that of K2WO4/Al2O3 catalyst without P.

关 键 词：磷助剂 钨酸钾-氧化铝催化剂 甲硫醇 甲硫醚 

分 类 号：TQ426[化学工程]