Atmospheric chemistry of automotive fuel additives: Diisopropyl ether

Journal Article · Fri Jan 01 04:00:00 EST 1993 · Environmental Science and Technology

DOI:https://doi.org/10.1021/es00038a009· OSTI ID:471647

Wallington, T J; Andino, J M; Potts, A R ^[1]

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1. Ford Motor Company, Dearborn, MI (United States); and others

To quantify the atmospheric reactivity of diisopropyl ether (DIPE), we have conducted a study of the kinetics and mechanism of reaction 1: OH + DIPE {r_arrow} products. Kinetic measurements of reaction 1 were made using both relative (at 295 K) and absolute techniques (over the temperature range 240-440 K). Rate data from both techniques can be represented by the following: k{sub 1} = (2.2{sub -0.8}{sup +14}) x 10{sup -12} exp[(445 {plus_minus} 145)/T] cm{sup 3} molecule{sup -1}s{sup -1}. At 298 K, k{sub 1} = 9.8 x 10{sup -12} cm{sup 3} molecule{sup -1}s{sup -1}. The products of the simulated atmospheric oxidation of DIPE were identified using FT-IR spectroscopy; isopropyl acetate and HCHO were the main products. The atmospheric oxidation of DIPE can be represented by i-C{sub 3}H{sub 7}O-i-C{sub 3}H{sub 7} + OH + 2NO {r_arrow} HCHO + i-C{sub 3}H{sub 7}OC(O)CH{sub 3} + HO{sub 2} + 2NO{sub 2}. Our kinetic and mechanistic data were incorporated into a 1-day simulation of atmospheric chemistry to quantify the relative incremental reactivity of DIPE. Results are compared with other oxygenated fuel additives. 30 refs., 9 figs.

• Sponsoring Organization: USDOE
• OSTI ID: 471647
• Journal Information: Environmental Science and Technology, Journal Name: Environmental Science and Technology Journal Issue: 1 Vol. 27; ISSN ESTHAG; ISSN 0013-936X
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION
ATMOSPHERIC CHEMISTRY
FUEL ADDITIVES
ISOPROPYL ETHER
NITRIC OXIDE
NITROUS OXIDE
OXIDATION