Abstract
In order to improve shape selectivity of the methanol to ethylene conversion and mitigate coke formation, the acid sites located on the external surface of Ni‐SAPO‐34 crystals were neutralized by the intrinsic mechanochemical method. Ni‐SAPO‐34 crystals were mixed in an agate mortar with basic alkaline or alkaline earth metal oxides supported on microspherical non‐porous silica. Their catalytic performances in methanol conversion were enhanced, especially in the case of BaO‐modified catalyst. The reason was verified by adopting the cracking of t‐butylbenzene, which could not access into the pore channel due to its bulky molecular size. These changes in the reaction performance consistently could be ascribed to the decrease of the acid sites on the external surfaces.
Similar content being viewed by others
References
T. Inui, H. Matsuda, H. Okaniura and A. Miyamoto, Appl. Catal. 58 (1990) 155.
J. Liang, H. Li, S. Zhao, W. Guo, R. Wang and M. Ling, Appl. Catal. 64 (1990) 31.
T. Inui, S. Phatanasri and H. Matsuda, J. Chem. Soc. Chem. Commun. (1990) 205.
J.M. Thomas, Y. Xu, C.R.A. Catlow and J.W. Coaves, Chem. Mater. 3 (1991) 667.
I.M. Dahl and S. Kolboe, J. Catal. 161 (1996) 304.
F. Salehirad and M.W. Anderson, J. Catal. 164 (1996) 301.
T. Inui and Y. Takegami, Hydrocarbon Process. 61 (1982) 117.
M. Niekerk, J.Q. Fletcher and C. O'Connor, Appl. Catal. A 138 (1996) 135.
S. Hocevar and J. Levec, J. Catal. 135 (1992) 518.
L.-T. Yuen, S.I. Zones, T.V. Harris, E.J. Gallegos and A. Auroux, Micropor. Mater. 2 (1994) 105.
T. Inui, J. Kim and M. Seno, Catal. Lett. 29 (1994) 271.
T. Inui, Y. Makino, F. Okazumi, S. Nagan and A. Miyamoto, Ind. Eng. Chem. Res. 26 (1987) 647.
T. Inui, Sekiyu Gakkaishi 33 (1990) 198.
T. Inui, S.B. Pu and J. Kugai, Appl. Catal. A 146 (1996) 285.
T. Inui, T. Yamada, A. Matsuoka and S.B. Pu, Ind. Eng. Chem. Res. (1997), in press.
T. Inui and M. Kang, Appl. Catal. A, in press.
T. Inui, H. Matsuda, H. Okaniwa and A. Miyamoto, Appl. Catal. 58 (1990) 155.
Rights and permissions
About this article
Cite this article
Kang, M., Inui, T. Effects of decrease in number of acid sites located on the external surface of Ni‐SAPO‐34 crystalline catalyst by the mechanochemical method. Catalysis Letters 53, 171–176 (1998). https://doi.org/10.1023/A:1019030627908
Issue Date:
DOI: https://doi.org/10.1023/A:1019030627908