广州化工
廣州化工
엄주화공
GUANGZHOU CHEMICAL INDUSTRY AND TECHNOLOGY
2012年
18期
44-46
,共3页
国金华%黄锋%马桂英%白海%王自庆
國金華%黃鋒%馬桂英%白海%王自慶
국금화%황봉%마계영%백해%왕자경
尿素%氨合成%锆酸钡%钌催化剂%稳定性
尿素%氨閤成%鋯痠鋇%釕催化劑%穩定性
뇨소%안합성%고산패%조최화제%은정성
urea%ammonia synthesis%BaZrO3%Ru catalysts%stability
以尿素为燃料,采用一步燃烧法制备了钙钛矿型BaZrO3负载钌催化剂,用于催化氨合成反应。研究发现,当尿素用量为理论用量的1.5倍时得到催化剂中BaZrO3物相最纯,催化剂的活性最高。在3 MPa,10000 h-1和425℃条件下,其出口氨浓度和催化反应速率分别可以达到4.81%和270.99 mL/（g.h）。该催化剂的高活性主要是由于载体的强供电子作用和电子传导性能导致的。
以尿素為燃料,採用一步燃燒法製備瞭鈣鈦礦型BaZrO3負載釕催化劑,用于催化氨閤成反應。研究髮現,噹尿素用量為理論用量的1.5倍時得到催化劑中BaZrO3物相最純,催化劑的活性最高。在3 MPa,10000 h-1和425℃條件下,其齣口氨濃度和催化反應速率分彆可以達到4.81%和270.99 mL/（g.h）。該催化劑的高活性主要是由于載體的彊供電子作用和電子傳導性能導緻的。
이뇨소위연료,채용일보연소법제비료개태광형BaZrO3부재조최화제,용우최화안합성반응。연구발현,당뇨소용량위이론용량적1.5배시득도최화제중BaZrO3물상최순,최화제적활성최고。재3 MPa,10000 h-1화425℃조건하,기출구안농도화최화반응속솔분별가이체도4.81%화270.99 mL/（g.h）。해최화제적고활성주요시유우재체적강공전자작용화전자전도성능도치적。
The BaZrO3 materials with perovskite style were synthesized by urea - nitrate combustion method and sup- ported Ru to catalytic ammonia synthesis. The effects of urea/nitrate ration on XRD patterns and catalytic performance were investigated. The results showed that when 150% of stoichiometric amount of urea was used, the catalyst exhibited an optimum catalytic behavior. The concentration and activity of NH3 were 4. 81% and 270. 99 mL/( h·g), respectively, under the condition of 425℃, 3 MPa and 10000 h- 1, mainly due to the electron conductivity of the its support.
