4.6 Article

Mechanism of the Ferrocyanide-Iodate-Sulfite Oscillatory Chemical Reaction

期刊

JOURNAL OF PHYSICAL CHEMISTRY A
卷 120, 期 12, 页码 1951-1960

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acs.jpca.5b11152

关键词

-

资金

  1. National Science Foundation [CHE-1362477]
  2. Division Of Chemistry
  3. Direct For Mathematical & Physical Scien [1362477] Funding Source: National Science Foundation

向作者/读者索取更多资源

Existing models of the ferrocyanide-iodate-sulfite (FIS) reaction seek to replicate the oscillatory pH behavior that occurs in open systems. These models exhibit significant differences in the amplitudes and waveforms of the concentration oscillations of such intermediates as I-, I-3(-), and Fe(CN)(6)(3-) under identical conditions and do not include several experimentally found intermediates. Here we report measurements of sulfite concentrations during an oscillatory cycle. Knowing the correct concentration of sulfite over the course of a period is important because sulfite is the main component that determines the buffer capacity, the pH extrema, and the amount of oxidizer (iodate) required for the transition to low pH. On the basis of this new result and recent experimental findings on the rate laws and intermediates of component processes, taken from the literature, we propose a mass action kinetics model that attempts to faithfully represent the,Chemistry of the FIS reaction. This new comprehensive mechanism reproduces the pH oscillations and the periodic behavior in [Fe(CN)(6)(3-)], [I-3(-)], [I-], and [SO32-](T) with characteristics similar to those seen in experiments in both CSTR and semibatch arrangements. The parameter ranges at which stationary and oscillatory behavior is exhibited also show good agreement with those of the experiments.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.6
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据