Coexistence of two bifurcation regimes in a closed ferroin-catalyzed Belousov-Zhabotinsky reaction.
Coexistence of two bifurcation regimes in a closed ferroin-catalyzed Belousov-Zhabotinsky reaction.
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DOI：
10.1021/jp0456279
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发表时间：
2005-01
期刊：
影响因子：
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通讯作者：
Jichang Wang;Jinpei Zhao;Yu Chen;Q. Gao;Yumei Wang
中科院分区：
文献类型：
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作者：
Jichang Wang;Jinpei Zhao;Yu Chen;Q. Gao;Yumei Wang
在间歇式反应器中研究了亚铁催化的Belousov-Zhabotinsky（BZ）反应，发现该反应经历两个独立的复杂振荡区域。值得注意的是，这两种分叉机制对反应混合物的组成表现出定性上不同的依赖性，即，溴酸盐、硫酸、丙二酸和亚铁的初始浓度。反应温度对两个分岔区域的影响也相反，温度的降低使第一个分岔区域的复杂性增强，而第二个分岔区域的振荡变得简单。专门为ferroin BZ系统开发的12变量模型的数值模拟能够再现实验中观察到的瞬态复杂振荡。这些计算进一步说明，反应，如ferroin和HOBr，ferroin和HBrO 2，和ferroin和Br-在描述复杂的动力学ferroin BZ反应是不必要的。
The ferroin-catalyzed Belousov-Zhabotinsky (BZ) reaction was studied in a batch reactor under anaerobic conditions and was found to evolve through two separated regimes of complex oscillations. Significantly, the two bifurcation regimes exhibited qualitatively different dependence on compositions of the reaction mixture, i.e., initial concentrations of bromate, sulfuric acid, malonic acid, and ferroin. The reaction temperature also showed opposite effects on the two bifurcation regimes, in which complexities of the first bifurcation regime were enhanced while oscillations in the second bifurcation regime became simpler as a result of decreasing temperature. Numerical simulations with a 12-variable model developed specifically for the ferroin-BZ system were able to reproduce transient complex oscillations observed in experiments. These calculations further illustrated that reactions such as ferroin and HOBr, ferroin and HBrO2, and ferriin and Br- were not essential in describing complex dynamics of the ferroin-BZ reaction.