Mechanisms of Oscillating Chemical Reactions

这项研究是实验物理化学计划的一部分，旨在研究振荡化学反应的机制。这项工作有望对振荡反应的基本动力学以及所涉及的体系的化学产生新的见解。还将获得有关具有环境和工业重要性的硫磺水化学的信息。第一个要研究的化学振荡器是在连续流动的搅拌釜式反应器中，亚甲基蓝催化的含硫离子被氧气氧化。一个主要的作用将是理清与自催化和/或抑制有关的动力学非线性在这个系统中的重要性。此外，还将研究催化和非催化溴离子驱动振荡器的机理。我们将试图从不完全混合导致的反应器中不同组成区域之间的耦合来解释搅拌釜式反应器中非周期性现象的充分证据。

This research, part of the Experimental Physical Chemistry Program, is designed to investigate the mechanisms of oscillating chemical reactions. This work is expected to lead to new insights into the basic dynamics of oscillating reactions as well as the chemistry of the systems involved. Information will also be obtained about the aqueous sulfur chemistry which is of environmental and industrial importance. The first chemical oscillator to be investigated is the methylene-blue-catalyzed oxidation of sulfur-containing ions by oxygen in a continuous-flow, stirred tank reactor. A major role will be to sort out the importance in this system of kinetic nonlinearities related to autocatalysis and/or inhibition. In addition, the mechanism of both catalyzed and uncatalyzed bromine-ion-driven oscillators will be examined. An attempt will be made to interpret the well-documented appearance of aperiodicity in stirred tank reactors in terms of coupling between areas of different composition in the reactor resulting from imperfect mixing.