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Synthesis of ZSM-23 (MTT) zeolites with differentcrystal morphology and intergrowths: effects onthe catalytic performance in the conversion ofmethanol to hydrocarbons

Molino, Andrea; Holzinger, J.; Lukaszuk, Katarzyna Anna; Rojo-Gama, Daniel; Gunnæs, Anette Eleonora; Skibsted, J.; Lundegaard, Lars Fahl; Svelle, Stian; Beato, Pablo; Bordiga, Silvia; Lillerud, Karl Petter
Journal article; SubmittedVersion
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Year
2019
Permanent link
http://urn.nb.no/URN:NBN:no-79243

CRIStin
1782721

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  • Kjemisk institutt [825]
  • Fysisk institutt [2253]
  • Det matematisk-naturvitenskapelige fakultet [244]
  • CRIStin høstingsarkiv [15004]
Original version
Catalysis science & technology. 2019, 9 (23), 6782-6792, DOI: https://doi.org/10.1039/c9cy01068h
Abstract
A series of zeolite ZSM-23 samples prepared with different organic structure-directing agents, gave rise to crystalline phases, which show a large variety of particle dimensions. A detailed analysis of the structure of these materials revealed the presence of different levels of stacking fault defects when using different recipes. The effect of crystal size and morphology was investigated in the methanol to hydrocarbon reaction at 400 °C, showing a predominant production of hydrocarbons in the range C3–C6+ and negligible amount of aromatics (<3%) in all cases. More importantly, we show that methanol conversion and catalytic lifetime are strongly influenced by small differences in crystal size and morphology due to a preferential crystal growth along the microchannel direction.
 
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