TY - JOUR
T1 - One-pot synthesis of sheet-like MFI as high-performance catalyst for toluene disproportionation
AU - Chao, Pei Yu
AU - Hsu, Chun Han
AU - Loganathan, Aswaghosh
AU - Lin, Hong Ping
N1 - Funding Information:
The authors thank the Ministry of Science and Technology, Taipei, Taiwan for their generous financial support (MOST 105–2113–M–006–011–MY–2) & (MOST 105–3113–E–006– 018–) & (MOST– 105–2218–E–006–007–) of this research.
Publisher Copyright:
© 2018 The American Ceramic Society
PY - 2018/8
Y1 - 2018/8
N2 - In this study, one-pot hydrothermal synthesis of sheet-like ZSM-5 as a high-performance catalyst for toluene disproportionation was carried out using binary surfactants. In the dual template, tetraethylammonium hydroxide was used to construct the microporous structure of ZSM-5, and cationic surfactant (e.g., octadecyltrimethylammonium chloride (C18TMAC), hexadecyltrimethyl ammonium bromide (C16TMAB), and tetradecyltrimethylammonium bromide, (C14TMAB)) can change the growth habits of the ZSM-5 crystals by hindering the regular stacking of zeolite layers from their longer hydrophobic chain. From the XRD pattern of the as-synthesized samples which were hydrothermally treated for different time, it was found that a lamellar mesostructured intermediate gradually transformed into the sheet-like ZSM-5 during hydrothermal process. With a proper amount of cationic surfactant, the thickness of the sheet-like ZSM-5 could be controlled to less than 30 nm. Concerning the catalyst application, the toluene disproportionation performance over the sheet-like ZSM-5 is 1.5 times higher than that of the commercial ZSM-5. The higher conversion is ascribed to the faster diffusion amount due to the sheet-like ZSM-5.
AB - In this study, one-pot hydrothermal synthesis of sheet-like ZSM-5 as a high-performance catalyst for toluene disproportionation was carried out using binary surfactants. In the dual template, tetraethylammonium hydroxide was used to construct the microporous structure of ZSM-5, and cationic surfactant (e.g., octadecyltrimethylammonium chloride (C18TMAC), hexadecyltrimethyl ammonium bromide (C16TMAB), and tetradecyltrimethylammonium bromide, (C14TMAB)) can change the growth habits of the ZSM-5 crystals by hindering the regular stacking of zeolite layers from their longer hydrophobic chain. From the XRD pattern of the as-synthesized samples which were hydrothermally treated for different time, it was found that a lamellar mesostructured intermediate gradually transformed into the sheet-like ZSM-5 during hydrothermal process. With a proper amount of cationic surfactant, the thickness of the sheet-like ZSM-5 could be controlled to less than 30 nm. Concerning the catalyst application, the toluene disproportionation performance over the sheet-like ZSM-5 is 1.5 times higher than that of the commercial ZSM-5. The higher conversion is ascribed to the faster diffusion amount due to the sheet-like ZSM-5.
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U2 - 10.1111/jace.15531
DO - 10.1111/jace.15531
M3 - Article
AN - SCOPUS:85048333673
SN - 0002-7820
VL - 101
SP - 3719
EP - 3728
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
IS - 8
ER -