Kinetics and pressure-dependent HO_x yields of the reaction between the Criegee intermediate CH₂OO and HNO₃

Abstract

The reaction of Criegee intermediates with nitric acid (HNO3) plays an important role in the sink of Criegee intermediates as well as the oxidation of atmospheric HNO3 because of its...

Full-dimensional automated potential energy surface development and detailed dynamics for the CH2OO + NH3 reaction

“…Due to having CO–O functional groups, Criegee intermediates are very reactive and they decompose to yield OH radicals 1–5 or react with many atmospheric species such as water, 6,7 sulfur dioxide, 8–11 nitrogen dioxide, 10,11 ammonia, 12–18 methanol, 19–21 organic and inorganic acids. 22–28…”

“…Due to having C¼O-O functional groups, Criegee intermediates are very reactive and they decompose to yield OH radicals [1][2][3][4][5] or react with many atmospheric species such as water, 6,7 sulfur dioxide, [8][9][10][11] nitrogen dioxide, 10,11 ammonia, [12][13][14][15][16][17][18] methanol, [19][20][21] organic and inorganic acids. [22][23][24][25][26][27][28] As the most abundant alkaline atmospheric compound, ammonia is believed to play an important role in the formation of inorganic aerosols 29,30 and secondary organic aerosols. 31,32 In regard to the reaction of the simplest Criegee intermediate CH 2 OO with NH 3 , Misiewicz et al 12 calculated a rate coefficient of 5.36 Â 10 À14 cm 3 molecule À1 s À1 .…”

Reaction between Criegee Intermediate CH2OO and Isobutyraldehyde: Kinetics and Atmospheric Implications

“…first prepared a high concentration of the simplest CI, CH 2 OO, in the laboratory via laser photolysis of CH 2 I 2 and subsequent reaction of CH 2 I+O 2 →CH 2 OO+I. In light of this, a lot of kinetic studies on bimolecular reactions between CIs and trace gases were performed, with coreactant including SO 2 , [5–7] NO 2 , [8–9] NH 3 , [10] H 2 O, (H 2 O) 2 , [3,5,11–12] alcohols, [13–16] aldehydes, [17–20] organic [4,21–22] and inorganic acids [23–24] . These reactions correlate to acid rain and aerosol formation [25–29] .…”