广州化工
廣州化工
엄주화공
GUANGZHOU CHEMICAL INDUSTRY AND TECHNOLOGY
2014年
19期
53-55,66
,共4页
掺杂%锐钛矿%金红石%晶型转变%晶粒尺寸
摻雜%銳鈦礦%金紅石%晶型轉變%晶粒呎吋
참잡%예태광%금홍석%정형전변%정립척촌
doped%anatase%rutile%crystal transformation%crystal size
以Ce掺杂的TiO2粉体为载体, MNOx 为活性组分,制备了MNOx/Ce-TiO2体系SCR催化剂,利用TG-DSC, XRD, SEM及EDS考察了Ce的掺杂对MNOx/TiO2体系活性的影响,采用模拟烟气分析装置测试催化剂的活性。结果表明: Ce离子的掺杂阻碍了TiO2粒子由锐钛矿型向金红石型的转变,拓宽了锐钛矿型TiO2的使用温度范围。 TiO2粉体粒子在锐钛矿型状态下,颗粒分散较为均匀,并且无明显团聚现象,保证了较高的比表面积,催化剂的SCR催化活性比未掺杂的催化剂活性有明显的提高。
以Ce摻雜的TiO2粉體為載體, MNOx 為活性組分,製備瞭MNOx/Ce-TiO2體繫SCR催化劑,利用TG-DSC, XRD, SEM及EDS攷察瞭Ce的摻雜對MNOx/TiO2體繫活性的影響,採用模擬煙氣分析裝置測試催化劑的活性。結果錶明: Ce離子的摻雜阻礙瞭TiO2粒子由銳鈦礦型嚮金紅石型的轉變,拓寬瞭銳鈦礦型TiO2的使用溫度範圍。 TiO2粉體粒子在銳鈦礦型狀態下,顆粒分散較為均勻,併且無明顯糰聚現象,保證瞭較高的比錶麵積,催化劑的SCR催化活性比未摻雜的催化劑活性有明顯的提高。
이Ce참잡적TiO2분체위재체, MNOx 위활성조분,제비료MNOx/Ce-TiO2체계SCR최화제,이용TG-DSC, XRD, SEM급EDS고찰료Ce적참잡대MNOx/TiO2체계활성적영향,채용모의연기분석장치측시최화제적활성。결과표명: Ce리자적참잡조애료TiO2입자유예태광형향금홍석형적전변,탁관료예태광형TiO2적사용온도범위。 TiO2분체입자재예태광형상태하,과립분산교위균균,병차무명현단취현상,보증료교고적비표면적,최화제적SCR최화활성비미참잡적최화제활성유명현적제고。
SCR catalysts of MNO x/TiO2 was prepared based on Ce doped TiO 2 powder as supporter and MNO x as active component.The catalysts were characterized by TG -DSC, XRD, SEM, EDS and the catalytic activities was examined with the device of simulated flue gas.The results showed that the doped Ce hindered the process of phase transition of TiO2 particles from anatase to rutile , and propagated the temperature ranges of anatase.TiO2 particles were well dispersed in the state of anatase , with no agglomerates observed , assured the high specific surface area and the catalysts activity improved obviously than no -doped.