화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.39, No.5, 1194-1206, May, 2022
DOI10.1007/s11814-022-1077-4  Export Citation
Three-step short-time temperature-programmed hydrothermal synthesis of ZSM-5 with high durability for conversion of methanol to propylene
Parisa Sadeghpour1, 2, and Mohammad Haghighi1, 2, †
  • 1Chemical Engineering Faculty, Sahand University of Technology, P. O. Box 51335-1996, Sahand New Town, Tabriz, Iran
  • 2Reactor and Catalysis Research Center (RCRC), Sahand University of Technology, P. O. Box 51335-1996, Sahand New Town, Tabriz, Iran
E-mail:
Three-step high temperature programmed hydrothermal preparation of ZSM-5 was investigated by using different crystallization times and temperatures. The synthesized nanostructured catalysts were analyzed by XRD, FESEM, EDX, BET-BJH, FTIR, TPD-NH3 and TGA techniques. According to the obtained characterization results, synthesis of ZSM-5(250-30,300-15,350-5) by short time temperature programmed showed a significant effect on the crystallinity, phase purity, morphology, textural properties and acidity of the nanostructured catalyst. Furthermore, this sample had small crystals with higher intercrystalline porosity and also proper distribution of acid sites. The synthesized catalysts were applied in the methanol to propylene (MTP) process under the operating conditions of T=460??C and GHSV=10,500 cm3/gcat??h in a fixed-bed reactor. The ZSM-5(250-30,300-15,350-5) catalyst exhibited high selectivity toward propylene (73%) with slow deactivation rate. Also, the possible reaction pathway for pure MFI preparation via three-step short-time temperature-programmed was presented.
Keywords:ZSM-5;High Temperature;Short Time;Three-step;Methanol;Propylene
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