当代化工
噹代化工
당대화공
CONTEMPORARY CHEMICAL INDUSTRY
2013年
1期
18-20
,共3页
时培甲%刘西仲%袁胜华%乔凯%高鹏%刘振华
時培甲%劉西仲%袁勝華%喬凱%高鵬%劉振華
시배갑%류서중%원성화%교개%고붕%류진화
SiO2载体%共沉淀法%Cu/SiO2催化剂%活性组分
SiO2載體%共沉澱法%Cu/SiO2催化劑%活性組分
SiO2재체%공침정법%Cu/SiO2최화제%활성조분
SiO2 supports%Coprecipitation method%Cu/SiO2 catalyst%Active component
分别以硅溶胶、气相SiO2、介孔SBA-15分子筛为载体,采用共沉淀法制备了Cu/SiO2催化剂,含活性组分Cu质量分数为25%.运用BET、XRD、H2-TPR、NH3-TPD等对催化剂进行表征.结果表明:以硅溶胶和气相SiO2为载体制得催化剂的Cu物种分散性较差,以SBA-15为载体制得催化剂的Cu物种以高度分散的形式存在,且具有较大的比表面积,较低的还原温度和较大的酸量.
分彆以硅溶膠、氣相SiO2、介孔SBA-15分子篩為載體,採用共沉澱法製備瞭Cu/SiO2催化劑,含活性組分Cu質量分數為25%.運用BET、XRD、H2-TPR、NH3-TPD等對催化劑進行錶徵.結果錶明:以硅溶膠和氣相SiO2為載體製得催化劑的Cu物種分散性較差,以SBA-15為載體製得催化劑的Cu物種以高度分散的形式存在,且具有較大的比錶麵積,較低的還原溫度和較大的痠量.
분별이규용효、기상SiO2、개공SBA-15분자사위재체,채용공침정법제비료Cu/SiO2최화제,함활성조분Cu질량분수위25%.운용BET、XRD、H2-TPR、NH3-TPD등대최화제진행표정.결과표명:이규용효화기상SiO2위재체제득최화제적Cu물충분산성교차,이SBA-15위재체제득최화제적Cu물충이고도분산적형식존재,차구유교대적비표면적,교저적환원온도화교대적산량.
Using silica sol, fumed silica or mesoporous SBA-15 molecular sieve as the support,Cu/SiO2 catalysts whose mass fraction of active component Cu is 25% were prepared by coprecipitation method. The catalysts were characterized by BET, XRD, H2-TPR and NH3-TPD. The results indicate that the dispersion of the copper species of catalysts supported on silicon sol and fumed silica is poor;the dispersion of the copper species of catalyst supported on SBA-15 is better, and the catalyst has bigger specific surface area, lower reduction temperature and larger acid quantity.
