Microwave-assisted rapid synthesis of nanosized SSZ-13 zeolites for effective conversion of ethylene to propylene

Nazmul Abedin Khan, Dong Kyu Yoo, Sungjune Lee, Tae Wan Kim, Chul Ung Kim, Sung Hwa Jhung

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

SSZ-13 is an attractive zeolite with chabazite topology composed of small pores with 8-membered rings. In this work, we report a highly effective method to synthesize SSZ-13s with microwave (MW) heating. Compared with conventional electric (CE) heating, MW heating accelerates both the nucleation and crystal growth rates of the synthesis by 6 and 18 times, respectively. Importantly, MW-assisted rapid synthesis produces the SSZ-13 with the smallest particles (<50 nm). However, the CE-assisted synthesis produces large/inhomogeneous particles (size: 0.4–1 μm). The obtained SSZ-13s were employed in acid catalysis or ethylene-to-propylene (ETP) reactions. The record-small SSZ-13s were more efficient in the ETP reactions, with more stable ethylene conversion/propylene yield (at the same time on stream) and higher propylene selectivity (at the same ethylene conversion), than large SSZ-13s. Finally, the maximum propylene yield (62%) is competitive or better than any SSZ-13s obtained via direct synthesis from precursors like silica and alumina.

Original languageEnglish
Pages (from-to)242-248
Number of pages7
JournalJournal of Industrial and Engineering Chemistry
Volume121
DOIs
StatePublished - 25 May 2023

Keywords

  • Ethylene-to-propylene
  • Fast synthesis
  • Microwave
  • Nanoparticle
  • SSZ-13
  • Zeolite

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