工业催化
工業催化
공업최화
INDUSTRIAL CATALYSIS
2014年
12期
944-948
,共5页
周国俊%夏倩%黄华%沈凯%戴路%肖卫强%袁凯龙%储国海%李鹄志%商周%詹望成%郭杨龙
週國俊%夏倩%黃華%瀋凱%戴路%肖衛彊%袁凱龍%儲國海%李鵠誌%商週%詹望成%郭楊龍
주국준%하천%황화%침개%대로%초위강%원개룡%저국해%리곡지%상주%첨망성%곽양룡
催化化学%钙钛矿型氧化物%烟碳%催化燃烧%燃烧温度
催化化學%鈣鈦礦型氧化物%煙碳%催化燃燒%燃燒溫度
최화화학%개태광형양화물%연탄%최화연소%연소온도
catalytic chemistry%perovskite-type oxide%cigarette soot%catalytic combustion%combustion temperature
采用柠檬酸溶胶-凝胶法制备La1-x Agx CoO3系列钙钛矿催化剂，并对催化剂进行XRD和H2-TPR表征。XRD结果表明，LaCoO3钙钛矿中掺杂Ag，部分Ag进入晶格，同时部分Ag以单质形式存在于钙钛矿表面。H2-TPR结果表明，Ag的掺杂有利于提高LaCoO3催化剂的低温还原性能。在此基础上，考察催化剂在紧密接触条件下对标准碳和烟碳的催化燃烧性能，发现LaCoO3钙钛矿可降低标准碳的起燃温度，在LaCoO3催化剂中掺入Ag，标准碳的燃烧温度进一步降低。催化剂对标准碳的催化燃烧活性随着Ag添加量的增加而逐渐增加。La1-x Agx CoO3催化剂对烟碳的催化燃烧具有较好活性，但Ag含量对催化剂在烟碳催化燃烧中的活性影响较小。为了在烟碳催化燃烧性能和降低卷烟燃烧温度之间建立关联，将催化剂添加到烟丝表面，考察催化剂的添加对卷烟最高燃烧温度的影响，结果表明，当催化剂添加量为烟丝质量的5%时，卷烟的最高燃烧温度可降低28℃。
採用檸檬痠溶膠-凝膠法製備La1-x Agx CoO3繫列鈣鈦礦催化劑，併對催化劑進行XRD和H2-TPR錶徵。XRD結果錶明，LaCoO3鈣鈦礦中摻雜Ag，部分Ag進入晶格，同時部分Ag以單質形式存在于鈣鈦礦錶麵。H2-TPR結果錶明，Ag的摻雜有利于提高LaCoO3催化劑的低溫還原性能。在此基礎上，攷察催化劑在緊密接觸條件下對標準碳和煙碳的催化燃燒性能，髮現LaCoO3鈣鈦礦可降低標準碳的起燃溫度，在LaCoO3催化劑中摻入Ag，標準碳的燃燒溫度進一步降低。催化劑對標準碳的催化燃燒活性隨著Ag添加量的增加而逐漸增加。La1-x Agx CoO3催化劑對煙碳的催化燃燒具有較好活性，但Ag含量對催化劑在煙碳催化燃燒中的活性影響較小。為瞭在煙碳催化燃燒性能和降低捲煙燃燒溫度之間建立關聯，將催化劑添加到煙絲錶麵，攷察催化劑的添加對捲煙最高燃燒溫度的影響，結果錶明，噹催化劑添加量為煙絲質量的5%時，捲煙的最高燃燒溫度可降低28℃。
채용저몽산용효-응효법제비La1-x Agx CoO3계렬개태광최화제，병대최화제진행XRD화H2-TPR표정。XRD결과표명，LaCoO3개태광중참잡Ag，부분Ag진입정격，동시부분Ag이단질형식존재우개태광표면。H2-TPR결과표명，Ag적참잡유리우제고LaCoO3최화제적저온환원성능。재차기출상，고찰최화제재긴밀접촉조건하대표준탄화연탄적최화연소성능，발현LaCoO3개태광가강저표준탄적기연온도，재LaCoO3최화제중참입Ag，표준탄적연소온도진일보강저。최화제대표준탄적최화연소활성수착Ag첨가량적증가이축점증가。La1-x Agx CoO3최화제대연탄적최화연소구유교호활성，단Ag함량대최화제재연탄최화연소중적활성영향교소。위료재연탄최화연소성능화강저권연연소온도지간건립관련，장최화제첨가도연사표면，고찰최화제적첨가대권연최고연소온도적영향，결과표명，당최화제첨가량위연사질량적5%시，권연적최고연소온도가강저28℃。
A series of perovskite oxides La1-x Agx CoO3 were synthesized by a citrate-based sol-gel method and characterized by XRD and H2-TPR. The XRD results showed that in the Ag-containing samples,parts of Ag substituted La3+ at A-site while others existed in the form of metal on the surface of the perovskites. The H2-TPR results revealed that the low-temperature redox ability of the samples doped with Ag was observably enhanced. La1-xAgxCoO3 catalysts were tested for carbon(Printex-U and cigarette soot)oxidation under tight-contact mode. LaCoO3 catalysts exhibited moderately low ignition temperature for Printex-U oxidation. The catalytic activities of LaCoO3 catalysts doped with Ag were progressively enhanced with the increase of Ag contents. Similarly,La1-x Agx CoO3 catalysts exhibited excellent activities for cigarette soot oxidation,but their activities were less affected by Ag content. La1-x Agx CoO3 catalysts were added to <br> tobacco surfaces and the effect of catalysts on the maximum combustion temperature of cigarette was investigated. The results showed that when the adding amount of the catalyst was 5% of tobacco mass,the maximum combustion temperature of cigarette reduced by 28 ℃.
