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제122회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Synthesis of SSZ-13 zeolite in the presence of dimethylethylcyclohexyl ammonium (DMCHA) ion and application of SSZ-13 in direct conversion of ethylene to propylene

2018년 8월 20일 14시 11분 08초
MAT.P-344 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 18일 (목요일) 11:00~12:30
Material Chemistry
저자 및
Sarker Mithun, Sung Hwa Jhung*
Department of Chemistry, Kyungpook National University, Korea
The conversion of Y zeolites (in the absence of any seed) having wide silica/alumina ratio (SAR, 5.1–80) into SSZ-13s was carried out in the presence of N,N,N-dimethylethylcyclohexylammonium (DMCHA) ion, as an organic structure directing agent (OSDA). Analcime or analcite phase (ANA) was obtained in case of low SARs (5.1-and 12) of the starting Y zeolites. Sodium silicate was used to increase the SARs of Y zeolites and played a vital role for the successful conversion of low SARs (5.1 and 12) Y zeolites. The protonated SSZ-13 zeolites with wide SAR ranges were employed in the direct ethylene-to-propylene (ETP) conversion to investigate not only the effect of the SARs on the ETP reaction but also the conversion of ethylene with propylene selectivity. The results showed that the SSZ-13s with moderate SARs have better catalytic activity than SSZ-13s with lower and higher SAR values. Moreover, DMCHA-Br derived SSZ-13 was better or quite competitive in ETP against SSZ-13 synthesized by using tetraethylammonium hydroxide as OSDA. Therefore, DMCHA+ can be recommended as a versatile OSDA for the conversion of Y zeolites into SSZ-13 based on low cost, and applicable for wide SAR range of starting Y zeolites as well as excellent performance in ETP reaction.