Atmospheric chemistry of trimethoxymethane, (CH{sub 3}O){sub 3}CH: Laboratory studies
- Risoe National Lab., Roskilde (Denmark). Atmospheric Chemistry, Plant Biology and Biogeochemistry Dept.
- Ford Motor Co., Dearborn, MI (United States)
A pulse radiolysis technique was used to measure the UV absorption spectra of (CH{sub 3}O){sub 2}CHOCH{sub 2}({center_dot}) [A] and (CH{sub 3}O){sub 2}CHOCH{sub 2}O{sub 2}({center_dot}) [B] radicals derived from trimethoxymethane over the range 220--320 nm. The self-reaction rate constants for these radicals were k{sub 5} = (3.5 {+-} 0.5) {times} 10{sup {minus}11} and k{sub 6 obs} = (1.3 {+-} 0.2) {times} 10{sup {minus}11} cm{sup 3}/molecule s. Rate constants for reactions of B radicals with NO and NO{sub 2} were k{sub 7} = (9.0 {+-} 1.2) {times} 10{sup {minus}12} and k{sub 8} = (1.0 {+-} 0.2) {times} 10{sup {minus}11} cm{sup 3}/molecule s, respectively. Rate constants for the reaction of OH radicals and F atoms with trimethoxymethane and the reaction of A radicals with O{sub 2} were k{sub 1} = (6.0 {+-} 0.5) {times} 10{sup {minus}12}, k{sub 3} = (3.0 {+-} 0.7) {times} 10{sup {minus}10}, and k{sub 2} = (9.2 {+-} 1.5) {times} 10{sup {minus}12} cm{sup 3}/molecule s, respectively. Relative rate techniques were used to measure k(Cl + trimethoxymethane) = (1.5 {+-} 0.2) {times} 10{sup {minus}10} cm{sup 3}/molecule s. OH-radical-initiated oxidation of trimethoxymethane in air gives dimethyl carbonate in a molar yield of 81 {+-} 10%. These results are discussed with respect to the atmospheric chemistry of automotive fuel additives.
- OSTI ID:
- 343684
- Journal Information:
- Journal of Physical Chemistry A: Molecules, Spectroscopy, Kinetics, Environment, amp General Theory, Vol. 103, Issue 15; Other Information: PBD: 15 Apr 1999
- Country of Publication:
- United States
- Language:
- English
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