m-Xylene Isomerization in SAPO-11/HZSM-5 Mixed Catalyst |
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Authors: | AS Araujo TB Domingos MJB Souza and AOS Silva |
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Institution: | (1) Department of Chemistry, Federal University of Rio Grande do Norte, CP 1662, 59078-970 Natal, RN, Brazil |
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Abstract: | The catalytic isomerization of m-xylene was studied over a solid acid silicoaluminophosphate type SAPO-11, mixed to HZSM-5 zeolite. The reaction was processed
varying the temperature and weight hourly space velocity, using a fixed bed continuous flow reactor. The m-xylene suffers isomerization to p-xylene and o-xylene by molecular displacement of methyl groups. The mixed catalyst was selective to p-xylene at 623 K and 2.5 h−1 with a maximum p/o ratio of 2.05. The ethylbenzene formation was not observed in the products. In this process an apparent activation energy
of the order of 13.9 kJ mol−1 was obtained.
This revised version was published online in June 2006 with corrections to the Cover Date. |
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Keywords: | m-Xylene isomerization SAPO-11/HZSM-5 catalyst |
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