Abstract
The conversion of ethylene and propylene absorbed in zeolite H-MFI was studied using UV-Raman spectroscopy. To observe early stage reaction intermediates, an infrared laser was used as a fast heating source. Alkyl substituted naphthalenes and fluorenes, which have been previously suggested as hydrocarbon pool species, were observed regardless of the olefin reagent. Conjugated dienes were formed from propylene but not observed for ethylene at short reaction times. Conventional heating in a furnace was used to force the reaction to completion. For propylene sheet-like polyaromatic hydrocarbons were formed immediately. For ethylene cyclic dienes, conjugated olefins, and ultimately sheet-like polyaromatic hydrocarbons were formed at progressively higher reaction temperatures. The results show that the polyaromatic species implicated as deactivating coke in zeolite catalysts can be formed by conversion of polyenes.
| Original language | English |
|---|---|
| Pages (from-to) | 2424-2432 |
| Number of pages | 9 |
| Journal | ACS Catalysis |
| Volume | 2 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - Nov 2 2012 |
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ASJC Scopus subject areas
- Catalysis
Cite this
Time-resolved studies of ethylene and propylene reactions in zeolite H-MFI by in-situ fast IR heating and UV Raman spectroscopy. / Allotta, Paula M.; Stair, Peter C.
In: ACS Catalysis, Vol. 2, No. 11, 02.11.2012, p. 2424-2432.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Time-resolved studies of ethylene and propylene reactions in zeolite H-MFI by in-situ fast IR heating and UV Raman spectroscopy
AU - Allotta, Paula M.
AU - Stair, Peter C
PY - 2012/11/2
Y1 - 2012/11/2
N2 - The conversion of ethylene and propylene absorbed in zeolite H-MFI was studied using UV-Raman spectroscopy. To observe early stage reaction intermediates, an infrared laser was used as a fast heating source. Alkyl substituted naphthalenes and fluorenes, which have been previously suggested as hydrocarbon pool species, were observed regardless of the olefin reagent. Conjugated dienes were formed from propylene but not observed for ethylene at short reaction times. Conventional heating in a furnace was used to force the reaction to completion. For propylene sheet-like polyaromatic hydrocarbons were formed immediately. For ethylene cyclic dienes, conjugated olefins, and ultimately sheet-like polyaromatic hydrocarbons were formed at progressively higher reaction temperatures. The results show that the polyaromatic species implicated as deactivating coke in zeolite catalysts can be formed by conversion of polyenes.
AB - The conversion of ethylene and propylene absorbed in zeolite H-MFI was studied using UV-Raman spectroscopy. To observe early stage reaction intermediates, an infrared laser was used as a fast heating source. Alkyl substituted naphthalenes and fluorenes, which have been previously suggested as hydrocarbon pool species, were observed regardless of the olefin reagent. Conjugated dienes were formed from propylene but not observed for ethylene at short reaction times. Conventional heating in a furnace was used to force the reaction to completion. For propylene sheet-like polyaromatic hydrocarbons were formed immediately. For ethylene cyclic dienes, conjugated olefins, and ultimately sheet-like polyaromatic hydrocarbons were formed at progressively higher reaction temperatures. The results show that the polyaromatic species implicated as deactivating coke in zeolite catalysts can be formed by conversion of polyenes.
UR - http://www.scopus.com/inward/record.url?scp=84868368498&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84868368498&partnerID=8YFLogxK
U2 - 10.1021/cs3004215
DO - 10.1021/cs3004215
M3 - Article
AN - SCOPUS:84868368498
VL - 2
SP - 2424
EP - 2432
JO - ACS Catalysis
JF - ACS Catalysis
SN - 2155-5435
IS - 11
ER -