CAJ | 학술논문

为比较不同铝源对 SBA -15分子筛改性的影响，以正硅酸乙酯为硅源，分别用异丙醇铝、氯化铝和硝酸铝对 SBA -15分子筛进行改性，运用 XRD、N2等温吸附-脱附、SEM、TEM 和气相色谱对样品进行表征。将3种不同铝源改性 SBA -15分子筛与 USY 分子筛复合制备加氢裂化催化剂，在固定床微型反应装置进行加氢裂化性能评价，结果表明，异丙醇铝在酸性条件下水解生成的 Al（OH）-4更容易进入 SiO2骨架中，生成的产物异丙醇不影响铝离子的掺杂，由于异丙醇铝与正硅酸乙酯的水解速率一致，改性后所得材料孔分布更均一，规整性更高。将异丙醇铝对 SBA -15分子筛改性后，与 USY 制备的复合分子筛催化剂用于正十二烷加氢裂化反应，选择性和转化率优于氯化铝和硝酸铝改性的分子筛。
위비교불동려원대 SBA -15분자사개성적영향，이정규산을지위규원，분별용이병순려、록화려화초산려대 SBA -15분자사진행개성，운용 XRD、N2등온흡부-탈부、SEM、TEM 화기상색보대양품진행표정。장3충불동려원개성 SBA -15분자사여 USY 분자사복합제비가경열화최화제，재고정상미형반응장치진행가경열화성능평개，결과표명，이병순려재산성조건하수해생성적 Al（OH）-4경용역진입 SiO2골가중，생성적산물이병순불영향려리자적참잡，유우이병순려여정규산을지적수해속솔일치，개성후소득재료공분포경균일，규정성경고。장이병순려대 SBA -15분자사개성후，여 USY 제비적복합분자사최화제용우정십이완가경열화반응，선택성화전화솔우우록화려화초산려개성적분자사。
In order to investigate the influence of different aluminum sources on the modification of SBA-15 molecular sieve,modified AlSBA-15 molecular sieves were prepared using tetraethyl orthosilicate as silica source,isopropanol aluminum,aluminum chloride and aluminum nitrate as aluminum sources. The as-prepared samples were characterized by means of XRD,TEM,SEM,N2 adsorption-desorption and gas chromatography. The composite molecular sieves catalysts AlSBA-15/ USY were prepared by using USY zeolite and AlSBA-15 samples,The hydrocracking performance of as-prepared catalysts were evaluated in a fixed bed microreactor. The results showed that under acidic condition,isopropanol aluminum hydrolyzed and formed Al(OH)-4 , which easily entered the framework of SiO2;hydrolysate isopropanol did not affected the doping of Al(OH)-4 . Because hydrolysis rates of isopropanol aluminum and tetraethyl orthosilicate were consistent, the as-prepared samples after modification possessed more uniform pore size distribution and higher regu-larity. The composite molecular sieve catalyst prepared by USY zeolite and AlSBA-15 molecular sieve modi-fied with isopropanol aluminum was used for n-dodecane hydrocracking,and exhibited better conversion and selectivity than the catalysts prepared with modified molecular sieves by aluminum chloride and aluminum nitrate.