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Study of the Synchrotron Photoionization Oxidation of Alpha-Angelica Lactone (AAL) Initiated by O(3P) at 298, 550, and 700 K

Journal Article · · Molecules
 [1];  [2]
  1. Univ. of California, San Francisco, CA (United States). Dept. of Chemistry; Univ. of California, San Francisco, CA (United States)
  2. Univ. of California, San Francisco, CA (United States). Dept. of Chemistry; Università degli Studi de L’Aquila (Italy). Dept. of Physical and Chemical Sciences
In recent years, biofuels have been receiving significant attention because of their potential for decreasing carbon emissions and providing a long-term renewable solution to unsustainable fossil fuels. Currently, lactones are some of the alternatives being produced. Many lactones occur in a range of natural substances and have many advantages over bioethanol. In this study, the oxidation of alpha-angelica lactone initiated by ground-state atomic oxygen, O(3P), was studied at 298, 550, and 700 K using synchrotron radiation coupled with multiplexed photoionization mass spectrometry at the Lawrence Berkeley National Lab (LBNL). Photoionization spectra and kinetic time traces were measured to identify the primary products. Ketene, acetaldehyde, methyl vinyl ketone, methylglyoxal, dimethyl glyoxal, and 5-methyl-2,4-furandione were characterized as major reaction products, with ketene being the most abundant at all three temperatures. Possible reaction pathways for the formation of the observed primary products were computed using the CBS–QB3 composite method.
Research Organization:
Univ. of California, Oakland, CA (United States); Univ. of Pennsylvania, Philadelphia, PA (United States)
Sponsoring Organization:
American Chemical Society; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-05CH11231; FG02-87ER13792
OSTI ID:
1849947
Journal Information:
Molecules, Journal Name: Molecules Journal Issue: 13 Vol. 26; ISSN MOLEFW; ISSN 1420-3049
Publisher:
MDPICopyright Statement
Country of Publication:
United States
Language:
English

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