CAJ | 학술논문

考察了SiO2-Al2 O3-TPABr-NH3·H2 O-H2 O体系晶化时间、晶化温度和原料用量等对合成HZSM-5性能的影响。当n（ SiO2）：n（ Al2 O3）=100、n（ TPABr）：n（ SiO2）=0.1、n（ NH3）：n（SiO2）=1.5、n（H2O）：n（SiO2）=22和晶种添加质量分数为4%时，180℃静态晶化72 h，合成收率与相对结晶度分别为10.1%和99.8%，对应理论收率为11.4%，合成收率与理论收率比为0.89。当投料n（SiO2）：n（Al2O3）从50增加到400，合成收率与结晶度分别超过8.9%和82.8%，合成收率与理论收率比为0.76～0.89；样品酸量随着n（ SiO2）：n（ Al2 O3）的增加逐渐减小，比表面积为405 m2·g-1，合成样品HZSM-5对甲醇制烯烃反应具有良好的酸催化活性。设定反应条件，采用投料n（ SiO2）：n（ Al2 O3）=250的样品，甲醇转化率、丙烯选择性和C2=～C4=选择性分别为100%、39.27%和62.01%。
고찰료SiO2-Al2 O3-TPABr-NH3·H2 O-H2 O체계정화시간、정화온도화원료용량등대합성HZSM-5성능적영향。당n（ SiO2）：n（ Al2 O3）=100、n（ TPABr）：n（ SiO2）=0.1、n（ NH3）：n（SiO2）=1.5、n（H2O）：n（SiO2）=22화정충첨가질량분수위4%시，180℃정태정화72 h，합성수솔여상대결정도분별위10.1%화99.8%，대응이론수솔위11.4%，합성수솔여이론수솔비위0.89。당투료n（SiO2）：n（Al2O3）종50증가도400，합성수솔여결정도분별초과8.9%화82.8%，합성수솔여이론수솔비위0.76～0.89；양품산량수착n（ SiO2）：n（ Al2 O3）적증가축점감소，비표면적위405 m2·g-1，합성양품HZSM-5대갑순제희경반응구유량호적산최화활성。설정반응조건，채용투료n（ SiO2）：n（ Al2 O3）=250적양품，갑순전화솔、병희선택성화C2=～C4=선택성분별위100%、39.27%화62.01%。
In SiO2-Al2 O3-TPABr-NH3 · H2 O-H2 O system,the effects of hydrothermal crystallization time and temperatures,and raw material amounts on the yields and properties of as-synthesized HZSM-5 molecular sieve were investigated. The results showed that the yield and relative crystallinity of as-synthesized samples were 10. 1% and 99. 8%,respectively,under the condition as follows:n( SiO2 ): n( Al2 O3 )=100, n(TPABr):n(SiO2)=0.1,n(NH3):n(SiO2)=1. 5,n(H2O):n(SiO2)=22,seed crystal amount 4%, crystallization temperature 180 ℃ and crystallization time 72 h. The corresponding theoretical yield was 11 . 4%,and the ratio of the yield of as-synthesized samples to the theoretical yield was 0 . 89 . As n(SiO2):n(Al2O3)of the raw material enhanced from 50 to 400,the yield and crystallinity of the as-synthesized samples remained more than 8. 9% and 82. 8%,respectively,and the ratio of as-synthesized sample yield to the theoretical yield was 0 . 76 -0 . 89 . The acid amount of the as-synthesized samples decreased gradually with the increase of n( SiO2 ): n( Al2 O3 )of the raw material. The as-synthesized HZSM-5 molecular sieve with BET surface area of 405 m2 ·g-1 exhibited good acid catalytic activity for methanol-to-olefins reaction. At the set condition,methanol conversion,the selectivity to propylene and C2=-C4= light olefins were 100%,39. 27% and 62. 01%,respectively,using HZSM-5 molecular sieve catalyst prepared with the raw material of n(SiO2):n(Al2O3)=250.