Mechanism of Atmospheric Oxidation of 1,1,1,2-Tetrafluoroethane (HFC 134a)

DOI: 10.1039/ft9949001819

Source and publish data:

Journal of the Chemical Society - Faraday Transactions p. 1819 - 1830 (1994)

Update date:2022-08-17

Topics:

Authors:

Rattigan, Oliver V.

Rowley, David M.

Wild, Oliver

Jones, Roderic L.

Cox, R. Anthony

Read Full Text PDF DownLoad Join now for total 90,000,000 free articles

Article abstract of DOI:10.1039/ft9949001819

The chlorine-initiated photooxidation of hydrofluorocarbon 134a (CF3CH2F) has been studied in the temperature range 235-318 K and at 1 atm total pressure using UV absorption.Trifluoroacetyl fluoride and formyl fluoride were observed as the major products.IR analysis of the reaction mixture also showed carbonyl fluoride as a product.By measurement of the yields of HC(O)F from the photooxidation as a function of and temperature, the rate of the unimolecular decomposition of the oxy radical, CF3CHFO, reaction (5), was determined relative to its reaction with O2, reaction (4): CF3CHFO + O2 --> CF3C(O)F + HO2 (4), CF3CHFO --> CF3 + HC(O)F (5).The results were treated using both an arithmetic derivation and numerical integration with a detailed reaction scheme.Inclusion of other recently published kinetic data leads to the following recommended rate expression for reaction (5) at 1 atm k₅ = 7.4E11exp<(-4720 +/- 220)/T> s^-1.The errors are 1?.The observation of enhanced product yields in the present work is attributed to the reaction of the CF3O radical with HFC 134a leading to further peroxy radical formation.The results have been incorporated into a 2D atmospheric model to assess the environmental implications of HFC 134a release in the troposphere.

Full text of DOI:10.1039/ft9949001819

Products guided by the article

Product name:formyl fluoride

Cas No:1493-02-3

R&D Labs maybe for 1493-02-3

Jiangxi Dongxu Chemical Science & Technology Co.,Ltd

Contact:+86-791-86899381

Address:Nanchang, Jiangxi, China
Maithili Life Sciences

Contact:+91 9963263336

Address:Plot#146A, IDA Mallapur, Hyderabad - 500072
Beijing Chemdow Co., Ltd

website:http://www.chemdow.com

Contact:0086-10-82435335

Address:Room 401,Unit 3,4th Floor,Shangdijiayuan,Shangdi East Road, Haidian District,Beijing
Nanjing yieldpharma co.ltd

Contact:13813902930 025-52714267

Address:20 Fengji Road, Yuhua Economic Development Zone, Nanjing, Jiangsu, P. R. China
Hangzhou Hysen Pharma co.,Ltd.

website:http://www.hysenpharma.cn/

Contact:0086-571-88298791

Address:#701,Gudun Road Hangzhou

Relevant to this article

Plant constituents of Tamarix aphylla flowers (Tamaricaceae)

Doi:10.1007/BF02326742
(1975)
Doi:10.1021/jo00901a002
(1975)
Silica-supported perchloric acid (HClO₄-SiO₂): A versatile catalyst for tetrahydropyranylation, oxathioacetalization and thioacetalization

Doi:10.1055/s-2006-942465
(2006)
Saponins from Bolbostemma paniculatum: Cyclic bisdesmosides, tubeimosides II and III

Doi:10.1016/0031-9422(88)80212-7
(1988)
Doi:10.1021/ja01060a053
(1964)
An ammonium molybdate deposited amorphous silica coated iron oxide magnetic core-shell nanocomposite for the efficient synthesis of 2-benzimidazoles using hydrogen peroxide

Doi:10.1039/c3gc42551g
(2014)

Article Doi