Heterogeneous Reaction HOCl + HBr -> BrCl + H_2O on Ice Films

Liang Chu; Liang T. Chu

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Heterogeneous Reaction HOCl + HBr -> BrCl + H_2O on Ice Films

机译：冰膜上HOCl + HBr-> BrCl + H_2O的非均相反应

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The heterogeneous reaction HOCl + HBr(s) -> BrCl + H_2O(s) on the ice surface at 189 and 220 K has been investigated in a flow reactor interfaced with a differentially pumped quadrupole mass spectrometer. Pseudo first-order decay of HOCl over the HBr-treated ice surfaces has been determined under the condition of P_(HOCl) < P_(HBr). For the HBr partial pressure in the range of 1.1 * 10~(-7) to 6.6 * 10~(-5) Torr, the reaction probability (#gamma#_g) was determined in the range of 0.06 to 0.38 at 189 K. The reaction probability is in the range of 0.01 to 0.07 at 220 K for HBr partial pressure from 7.2 * 10~(-7) to 1.3 * 10~(-5) Torr. The reaction probability was found to be strongly dependent on the ice surface temperature. The reaction probability is higher at the lower temperature than that at the warmer temperature and a mechanistic explanation is provided. The "true" reaction probabilities (#gamma#_t) of the reaction were calculated using a pore diffusion model. The kinetic analysis indicates that the heterogeneous reaction of HOCl + HBr may follow the Eley-Rideal type of mechanism. Also, the heat of uptake of HOCl on ice was determined to be about -8.5 +- 2 kcal/mol.

机译：在与差动泵浦四极杆质谱仪对接的流动反应器中，研究了在189和220 K时在冰面上的非均相反应HOCl + HBr（s）> BrCl + H_2O（s）。在P_（HOCl）

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《The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory》 |1999年第6期|共9页
作者
Liang Chu; Liang T. Chu;
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中图分类物理化学（理论化学）、化学物理学;
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2. Heterogeneous Reaction HOCl + HBr -> BrCl + H_2O on Ice Films [J] . Liang Chu, Liang T. Chu The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory . 1999,第6期

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Heterogeneous Reaction HOCl + HBr -> BrCl + H_2O on Ice Films

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