Document Detail


Hydrogen peroxide decomposition rate: a shock tube study using tunable laser absorption of H(2)O near 2.5 microm.
MedLine Citation:
PMID:  19799388     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
The thermal decomposition of hydrogen peroxide was measured behind reflected shock waves in hydrogen peroxide/inert gas mixtures using a sensitive laser diagnostic for water vapor. In these mixtures, the formation rate of water is predominantly controlled by the decomposition rate of hydrogen peroxide. Rate determinations were made over a temperature range of 1000-1200 K and a pressure range of 0.9-3.2 atm for both argon and nitrogen carrier gases. Good detection sensitivity for water was achieved using tunable diode laser absorption of water at 2550.96 nm within its v(3) fundamental band. Hydrogen peroxide decomposition rates were found to be independent of pressure at 0.9 and 1.7 atm and showed only slight influence of pressure at 3.2 atm. The best fit of the current data to the low-pressure-limit rate for H(2)O(2) dissociation in argon bath gas is k(1,0) = 10(15.97+/-0.10) exp(-21 220 +/- 250 K/T) [cm(3) mol(-1) s(-1)] (1000-1200 K). Experiments conducted in a nitrogen bath gas show a relative collision efficiency of argon to nitrogen of 0.67.
Authors:
Zekai Hong; Aamir Farooq; Ethan A Barbour; David F Davidson; Ronald K Hanson
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The journal of physical chemistry. A     Volume:  113     ISSN:  1520-5215     ISO Abbreviation:  J Phys Chem A     Publication Date:  2009 Nov 
Date Detail:
Created Date:  2009-11-12     Completed Date:  2010-02-12     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9890903     Medline TA:  J Phys Chem A     Country:  United States    
Other Details:
Languages:  eng     Pagination:  12919-25     Citation Subset:  -    
Affiliation:
Department of Mechanical Engineering, Stanford University, Stanford, California 94305, USA. hongzk@stanford.edu
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