Efficient dehalogenation of automobile shredder residue in NaOH/ethylene glycol using a ball mill.
Efficient dehalogenation of automobile shredder residue in NaOH/ethylene glycol using a ball mill.
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使用球磨机对 NaOH/乙二醇中的汽车粉碎机残留物进行高效脱卤。
DOI：
10.1016/j.chemosphere.2008.09.009
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发表时间：
2009
期刊：
影响因子：
8.8
通讯作者：
T. Yoshioka
中科院分区：
文献类型：
--
作者：
T. Kameda;Yuuzou Fukuda;Kye;G. Grause;T. Yoshioka
我们研究了氢氧化钠/乙二醇 (NaOH/EG) 使用球磨机对汽车粉碎残渣 (ASR) 进行脱卤的效果。通过使用 EG（196°C b.p.）作为 NaOH 的替代溶剂与球磨相结合，在大气压下实现了高效脱卤，从而改善了溶液中 ASR 和 OH− 之间的接触。适度的 NaOH 浓度和增加的球磨机转速可产生较高的脱氯效果，且脱氯效果不受 ASR 与 EG 重量比的显着影响。 NaOH/EG脱氯随着温度的升高而增加，表观活化能为50kJmol−1，证实反应是在化学反应控制下进行的。改进的收缩核心模型适合解释脱氯过程。经过 NaOH/EG 处理的 ASR 中的氯含量较低，表明该材料可用于原料回收，并且湿法工艺可适用于其他重要废物流的脱卤。
We investigated the effectiveness of sodium hydroxide/ethylene glycol (NaOH/EG) for dehalogenation of automobile shredder residue (ASR) using a ball mill. Efficient dehalogenation was achieved at atmospheric pressure by combining the use of EG (196°C b.p.) as a replacement solvent for NaOH with ball milling, which improved contact between ASR and OH−in solution. Moderate NaOH concentrations and increased ball mill rotation speeds produced high dechlorination that was not significantly affected by the weight ratio of ASR to EG. NaOH/EG dechlorination increased with temperature with an apparent activation energy of 50kJmol−1confirming that the reaction proceeded under chemical reaction control. The modified shrinking-core model was appropriate to explain the dechlorination process. Low chloro levels in our NaOH/EG-treated ASR suggested that this material could be used for feedstock recycling and the wet process may be applicable for dehalogenation of other important waste streams.