Abstract
Crystalline samples of medium-pore SAPO-41 and small-pore SAPO-44 have been prepared by respective use of diethylamine and cyclohexylamine as templates. They were characterized using X-ray powder diffraction, DTA-TGA and diffuse reflectance infra-red Fourier transform (DRIFT) spectroscopy. SAPO-44 has larger void volume and stronger framework acidity than SAPO-41. Whereas the products of methanol conversion on SAPO-41 are dominated by dimethylether, the main products on SAPO-44 are ethene and propene. Nevertheless, SAPO-44 is less active than SAPO-34 (which possesses a similar framework structure to SAPO-44) and suffers deactivation in about an hour at 450°C.
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Chen, J., Thomas, J.M. Synthesis of SAPO-41 and SAPO-44 and their performance as acidic catalysts in the conversion of methanol to hydrocarbons. Catal Lett 11, 199–207 (1991). https://doi.org/10.1007/BF00764086
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DOI: https://doi.org/10.1007/BF00764086