Bursting in the Belousov-Zhabotinsky reaction added with phenol in a batch reactor

Bursting in the Belousov-Zhabotinsky reaction added with phenol in a batch reactor
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DOI:
10.5935/0103-5053.20130254
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发表时间:
2013-12
影响因子:
1.4
通讯作者:
A. Cadena;D. Barragán;J. Ágreda
A. Cadena;D. Barragán;J. Ágreda
中科院分区:
化学4区
文献类型:
--
作者:
A. Cadena;D. Barragán;J. Ágreda

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4+ 转化为Ce 3+ 并除去反应混合物的分子溴。两种基质的振荡反应表现出爆发性放电和长时间的振荡周期。实验数据分析表明,作为初始苯酚浓度增加的函数,爆裂现象有所增加,爆裂点火中的尖峰更大,并且静止状态更长。据推测,爆裂现象可以通过在还原酚类(羟基酚)和氧化酚类(醌)之间引入氧化还原循环来解释。该假设经过实验和数值测试,从结果可以得出结论,两种底物的振荡反应所表现出的爆裂现象主要是由对二羟基苯/对苯醌氧化还原循环驱动的。
4+ to Ce 3+ and in the removal of molecular bromine of the reaction mixture. The oscillating reaction of two substrates exhibited burst firing and an oscillatory period of long duration. Analysis of experimental data shows an increasing of the bursting phenomenon, with a greater spiking in the burst firing and with a longer quiescent state, as a function of the initial phenol concentration increase. It was hypothesized that the bursting phenomenon can be explained introducing a redox cycle between the reduced phenolic species (hydroxyphenols) and the oxidized ones (quinones). The hypothesis was experimentally and numerically tested and from the results it is possible to conclude that the bursting phenomenon exhibited by the oscillating reaction of two substrates is mainly driven by a p-di-hydroxy-benzene/p-benzoquinone redox cycle.