工业催化
工業催化
공업최화
INDUSTRIAL CATALYSIS
2015年
8期
654-658
,共5页
催化化学%柴油烟气净化%La- K-Co- Mn%四效催化剂%合成温度%钙钛矿结构
催化化學%柴油煙氣淨化%La- K-Co- Mn%四效催化劑%閤成溫度%鈣鈦礦結構
최화화학%시유연기정화%La- K-Co- Mn%사효최화제%합성온도%개태광결구
catalytic chemistry%diesel smoke pUrification%La-K-Co-Mn%foUr-way catalyst%synthetic temperatUre%perovskite strUctUre
四效催化剂的活性组分 La0.8 K0.2 Co0.7 Mn0.3 O3的合成温度对柴油烟气的净化效果有较大影响，通过 X 射线衍射、电子扫描电镜、程序升温、比表面积检测和在线效率检测发现，750℃合成的四效催化剂净化柴油烟气的效果最好。通过 K 和 Mn 同时部分取代 LaCoO3中 La 和 Co，探讨 K 和Mn 对钙钛矿结构和烟气净化效果的影响。比表面积检测发现，涂覆改性γ- Al2 O3后，整体式催化剂比表面积增加，催化性能得到有效改善。
四效催化劑的活性組分 La0.8 K0.2 Co0.7 Mn0.3 O3的閤成溫度對柴油煙氣的淨化效果有較大影響，通過 X 射線衍射、電子掃描電鏡、程序升溫、比錶麵積檢測和在線效率檢測髮現，750℃閤成的四效催化劑淨化柴油煙氣的效果最好。通過 K 和 Mn 同時部分取代 LaCoO3中 La 和 Co，探討 K 和Mn 對鈣鈦礦結構和煙氣淨化效果的影響。比錶麵積檢測髮現，塗覆改性γ- Al2 O3後，整體式催化劑比錶麵積增加，催化性能得到有效改善。
사효최화제적활성조분 La0.8 K0.2 Co0.7 Mn0.3 O3적합성온도대시유연기적정화효과유교대영향，통과 X 사선연사、전자소묘전경、정서승온、비표면적검측화재선효솔검측발현，750℃합성적사효최화제정화시유연기적효과최호。통과 K 화 Mn 동시부분취대 LaCoO3중 La 화 Co，탐토 K 화Mn 대개태광결구화연기정화효과적영향。비표면적검측발현，도복개성γ- Al2 O3후，정체식최화제비표면적증가，최화성능득도유효개선。
The synthetic temperatUre of perovskite foUr-way catalyst active component La0. 8 K0. 2 Co0. 7 Mn0. 3 O3 has great inflUence on diesel smoke pUrification. The resUlts of online testing and characterization of XRD, BET,SEM and temperatUre programmed detection showed that the catalyst prepared at 750 ℃ had the best catalytic effect. When La and Co of LaCoO3 were partly replaced together by K and Mn,the inflUence of K and Mn on perovskite strUctUre and pUrification effect of flUe gas was investigated. The resUlts of BET characterization indicated that after the modification of γ-Al2 O3 ,the specific sUrface area of monolithic perovskite catalyst was obvioUsly increased,and its catalytic performance was effectively improved.
