Zinc-containing BEA zeolite catalysts of the РDH-СО2 process

What is it about?

Research results about the structure, acid-base, redox, and adsorption characteristics of zinc(yttrium)-containing dealuminated BEA zeolites (Si/Al=1000) and their catalytic properties in the propane dehydrogenation with CO2 are presented.

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Why is it important?

Our findings show that an increase in the zinc content to 2% (introduced into the T-position of SiBEA, Si/Al=1000) provides an increase in propane conversion by 1.5–2 times and selectivity for propene, (ii) an co-introduction of 2% Zn and 2%Y into SiBEA zeolite leads to a slight decrease in propane conversion, a lower selectivity of propene formation, and a 1.5 times lower yield of propene over Zn2.0Y2.0SiBEA catalyst; (iii) the highest total surface acidity of the Zn2.0Y2.0SiBEA catalyst, and the maximum content of strong acid sites (Lewis and Brønsted) causes a higher content of process byproducts (CH4, C2H4, C2H6) (iv) a larger number of adsorption sites of C3H8 and C3H6 explains the high intensity of side reactions on the surface of Zn2.0Y2.0SiBEA catalyst.