Department of Chemistry, Pepperdine University, Malibu, CA 90263, United States.
Chemosphere. 2011 Jan;82(4):592-6. doi: 10.1016/j.chemosphere.2010.11.015. Epub 2010 Dec 4.
Tetrakis-(4-sulfonatophenyl)porphyrin cobalt was identified as a highly-active reductive dechlorination catalyst for chlorinated ethylenes. Through batch reactor kinetic studies, degradation of chlorinated ethylenes proceeded in a step-wise fashion with the sequential replacement of Cl by H. For perchloroethylene (PCE) and trichloroethylene (TCE), the dechlorination products were quantified and the C₂ mass was accounted for. Degradation of the chlorinated ethylenes was found to be first-order in substrate. Dechlorination trials with increasing catalyst concentration showed a linearly increasing pseudo first-order rate constant which yielded rate laws for PCE and TCE degradation that are first-order in catalyst. The dechlorination activity of this catalyst was compared to that of another water-soluble cobalt porphyrin under the same reaction conditions and found to be comparable for PCE and TCE.
四-(4-磺酸钠苯基)卟啉钴被鉴定为一种高效的还原脱氯催化剂，可用于氯化乙烯。通过批式反应器动力学研究，氯化乙烯的降解以逐步的方式进行，Cl 被 H 取代。对于全氯乙烯（PCE）和三氯乙烯（TCE），脱氯产物被定量，并计算了 C₂的质量。发现氯化乙烯的降解在底物中呈一级反应。随着催化剂浓度的增加进行脱氯试验，得到了一个线性增加的拟一级速率常数，这为 PCE 和 TCE 降解的速率定律提供了催化剂一级反应的结果。在相同的反应条件下，将该催化剂的脱氯活性与另一种水溶性钴卟啉进行了比较，发现其对 PCE 和 TCE 的脱氯活性相当。
