In several recent papers [15] we have shown that cyclic
organic species are part of the active sites for methanol-toolefin
(MTO) catalysis on microporous solid acids [6,7]. On
zeolite HZSM-5 these reaction centers are either methylsubstituted
cyclopentenyl carbenium ions or methylbenzenes
[2]. On the silico-aluminophosphate acid catalyst
HSAPO-34 [7], the reaction centers are methylbenzenemolecules
[3,5], and we cannot rule out the possibility that other
types of arenes, e.g., methylnaphthalenes, could also be reaction
centers. HSAPO-34 has the CHA topology (its 1 nm
cages are interconnected through 0.37 nm windows), and
aromatic molecules, even benzene, once formed cannot escape SPEX6970EFM 冷冻研磨机
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