工业催化
工業催化
공업최화
INDUSTRIAL CATALYSIS
2014年
11期
855-858
,共4页
催化剂工程%氧化铝载体%堆积密度%挤出成型%切粒整形%焙烧温度%焙烧气氛
催化劑工程%氧化鋁載體%堆積密度%擠齣成型%切粒整形%焙燒溫度%焙燒氣氛
최화제공정%양화려재체%퇴적밀도%제출성형%절립정형%배소온도%배소기분
catalyst engineering%alumina carrier%bulk density%extrusion molding%cutting and shaping%calcination temperature%calcination atmosphere
采用挤出成型法制备氧化铝载体，考察挤出成型工艺条件、切粒频率、焙烧温度和焙烧气氛对渣油加氢脱硫催化剂载体堆积密度及物化性能的影响。结果表明，酸粉比（A+0.5）mL·g-1、水粉比（B+0.10）mL·g-1和混捏时间（t+5）min制备的载体堆积密度合适，物化性能优良；切粒整形频率为40 Hz时，载体条长分布中，（3~8）mm条占87 .14%；随着焙烧温度的升高，载体比表面积减少，孔径分布中小于6 nm孔减少，堆积密度减小；随着焙烧气量的减少，载体比表面积降低，孔体积增加，堆积密度减小，孔径分布中小于6 nm孔减少，（6~20）nm孔增加。精确控制载体焙烧温度和气量，可制备出比表面积合适、堆积密度稳定、孔径分布集中和满足固定床渣油加氢脱硫要求的工业氧化铝载体。
採用擠齣成型法製備氧化鋁載體，攷察擠齣成型工藝條件、切粒頻率、焙燒溫度和焙燒氣氛對渣油加氫脫硫催化劑載體堆積密度及物化性能的影響。結果錶明，痠粉比（A+0.5）mL·g-1、水粉比（B+0.10）mL·g-1和混捏時間（t+5）min製備的載體堆積密度閤適，物化性能優良；切粒整形頻率為40 Hz時，載體條長分佈中，（3~8）mm條佔87 .14%；隨著焙燒溫度的升高，載體比錶麵積減少，孔徑分佈中小于6 nm孔減少，堆積密度減小；隨著焙燒氣量的減少，載體比錶麵積降低，孔體積增加，堆積密度減小，孔徑分佈中小于6 nm孔減少，（6~20）nm孔增加。精確控製載體焙燒溫度和氣量，可製備齣比錶麵積閤適、堆積密度穩定、孔徑分佈集中和滿足固定床渣油加氫脫硫要求的工業氧化鋁載體。
채용제출성형법제비양화려재체，고찰제출성형공예조건、절립빈솔、배소온도화배소기분대사유가경탈류최화제재체퇴적밀도급물화성능적영향。결과표명，산분비（A+0.5）mL·g-1、수분비（B+0.10）mL·g-1화혼날시간（t+5）min제비적재체퇴적밀도합괄，물화성능우량；절립정형빈솔위40 Hz시，재체조장분포중，（3~8）mm조점87 .14%；수착배소온도적승고，재체비표면적감소，공경분포중소우6 nm공감소，퇴적밀도감소；수착배소기량적감소，재체비표면적강저，공체적증가，퇴적밀도감소，공경분포중소우6 nm공감소，（6~20）nm공증가。정학공제재체배소온도화기량，가제비출비표면적합괄、퇴적밀도은정、공경분포집중화만족고정상사유가경탈류요구적공업양화려재체。
Alumina carriers for residue hydrodesulfurization catalyst were prepared by adopting extrusion molding method. The effects of extrusion molding process conditions,cutting frequency,calcination temperatures and atmosphere on the bulk density and physicochemical properties of residue hydrodesulfurization catalyst carrier were investigated. The results showed that the bulk density and physicochemical properties of the carrier was the best under the preparation condition of acid/powder ratio(A +0. 5)mL·g-1,water/powder ratio(B+0. 10)mL·g-1,and kneading time(t+5)min. When cutting and shaping frequency was 40 Hz,the catalyst carrier with length distribution(3 -8)mm accounted for 87. 14%;with the increase of calcination temperature,the specific surface area,pore amount with pore size less than 6 nm and bulk density of the carrier decreased;with the decrease of calcination gas flow,the surface area and bulk density of the carrier decreased,pore volume increased,the pores with pore size distribution less than 6 nm and( 6 -20 ) nm were reduced and increased,respectively. By controlling exactly calcination temperature and calcination gas flow,the alumina support with suitable surface area,stabe bulk density, and concentrated pore size distribution concentration was prepared,which could meet the industrial requirements for the fixed bed residue hydrodesulfurization.
