β-Mo_2N_(0.78)的合成及其对噻吩加氢脱硫反应的催化性能  

Synthesis of β-Mo_2N_(0.78)and Its Catalytic Activity for Hydrodesulfurization of Thiophene

作　　者：龚树文[1] 陈皓侃[1] 李文[1] 李保庆[1] 

机构地区：[1]中国科学院山西煤炭化学研究所煤转化国家重点实验室,山西太原030001

出　　处：《催化学报》2003年第9期687-690,共4页

基　　金：山西省青年基金资助项目 (2 0 0 0 10 14 )

摘　　要：以N2 H2 混合气为反应气 ,与三氧化钼进行多段程序升温反应制得了氮化钼 .考察了反应气组成和氮化温度等条件对氮化钼结构组成的影响 .结果表明 ,在n(N2 ) /n(H2 ) =0 2 5～ 1,θ =6 5 0～ 75 0℃的条件下 ,生成的氮化钼结构组成为 β Mo2 N0 78.其生成机理与γ Mo2 N有类似之处 .β Mo2 N0 78催化噻吩加氢脱硫反应的结果表明 ,β Mo2 N0 78催化剂对该反应有较高的催化活性 ,在 36 0℃下 ,其活性比硫化钼催化剂高一倍左右 .Molybdenum nitrides were prepared by nitriding the corresponding oxide precursor with N 2 H 2 mixed gases via temperature programmed reaction. The effects of n (N 2)/ n (H 2) and nitriding temperature on the nitriding products were investigated. It was showed that β Mo 2 N 0 78 could form under the conditions of n (N 2)/ n (H 2)=0 25～1 and θ =650～750 ℃. The formation mechanism of β Mo 2N 0 78 was similar to that of γ Mo 2N . The hydrodesulfurization (HDS) of thiophene over β Mo 2N 0 78 was performed in a fixed bed reactor at atmosphere pressure. β Mo 2 N 0 78 showed high catalytic activity, which was about twice as high as that of MoS 2 at 360 ℃. The bulk structure of the catalyst remained unchanged after the HDS reaction.

关 键 词：氮化钼 噻吩 加氢脱硫 程序升温反应 氮化温度 

分 类 号：O643.3[理学—物理化学]