Unique Role of GeO2 as a Noninvasive Promoter of Nano-Sized Zeolite Crystals

Parmar, Deependra (författare)

Mallette, Adam J. (författare)

Yang, Taimin, 1991- (författare): Stockholms universitet,Institutionen för material- och miljökemi (MMK)

Zou, Xiaodong (författare): Stockholms universitet,Institutionen för material- och miljökemi (MMK)

Rimer, Jeffrey D. (författare)

(creator_code:org_t)

Relaterad länk:: https://urn.kb.se/re...; visa fler...; https://doi.org/10.1...; visa färre...

Abstract Ämnesord

Stäng

The synthesis of zeolites with nano-sized dimensions is often limited to a narrow design space that conventionally relies upon the design of organics to direct hierarchical materials. Here, it is demonstrated that the addition of an inorganic modifier, germanium oxide (GeO2), to a zeolite growth mixture directs the formation of crystals with ultrasmall dimensions. This effect is observed for zeolites ZSM-11 and ZSM-5 over a range of synthesis conditions wherein the role of GeO2 in zeolite crystallization deviates from its typical function as a heteroatom. Notably, the final products contain trace amounts of Ge, which indicates the inorganic modifier does not compete for sites in the zeolite framework based on its formation of a discrete phase that enables GeO2 recovery. Catalytic tests using the methanol-to-hydrocarbons reaction reveal significant enhancement in the performance of zeolite catalysts prepared with GeO2 compared to reported examples of nano-sized zeolites. These findings highlight a potentially generalizable and commercially viable synthesis method to reduce mass-transport limitations in zeolites for diverse applications.

Av författaren/redakt...: Parmar, Deependr ...; Mallette, Adam J ...; Yang, Taimin, 19 ...; Zou, Xiaodong; Rimer, Jeffrey D ...

Om ämnet

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.