微波辅助雷尼镍-铝合金催化剂催化1,4-二氯苯快速脱氯反应动力学研究 |
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引用本文: | 陈志明,莫招育,吕保樱,谢鸿,唐丽,林华. 微波辅助雷尼镍-铝合金催化剂催化1,4-二氯苯快速脱氯反应动力学研究[J]. 安徽农业科学, 2013, 41(1): 241-244 |
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作者姓名: | 陈志明 莫招育 吕保樱 谢鸿 唐丽 林华 |
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作者单位: | 1. 广西壮族自治区环境保护科学研究院,广西南宁,530022 2. 广西橡胶研究所,广西桂林,541004 |
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摘 要: | 利用雷尼镍-铝合金催化剂的高催化活性,提出了使用微波辅助雷尼镍-铝合金催化1,4-二氯苯还原脱氯的方法。结果表明,在微波辅助雷尼镍-铝合金催化剂条件下,1,4-二氯苯还原脱氯的反应符合二级反应动力学方程。1,4-二氯苯脱氯的反应速率常数k1在35和50℃下分别为0.037 6和0.151 mol/(L.min),反应活化能为76.66 kJ/mol。研究还表明,在微波辅助雷尼镍-铝合金催化剂的条件下,35℃时,1,4-二氯苯10 min脱氯率达到90%,并且反应同时脱掉两个氯,能达到高效脱氯的目的。由此可知,微波辅助雷尼镍-铝合金催化脱氯的方法应用于多氯苯类物质脱氯取得良好的效果。
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关 键 词: | 1,4-二氯苯 雷尼镍-铝合金催化剂 微波 脱氯 |
In-situ Rapid Dechlorination by Microwave-assisted Catalytic Reduction of Chlorobenzene and 1,4-dichlorobenzene on Raney Ni-Al alloy Catalyst |
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Affiliation: | CHEN Zhi-ming et al(Environmental Protection Research Institute of Guangxi,Nanning,Guangxi 530022) |
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Abstract: | Microwave-assisted catalytic reductive dechlorination on Raney Ni-A1 alloy catalyst is an efficient method for chlorobenzene (CB) and 1,4-dichlorobenzene (1,4-DCB) treatment. The result showed that the Raney Ni-A1 alloy catalyst retains its high activity in this in-situ reduetive dechlorination reaction. This reductive dechlorination reaction was in accordance of the psendo-second-order reaction kinetics under microwave irradiation. The activation energy (Ea) was 76.24 kJ/mol. And the constant of 1,4-DCB dechlorination was 0. 037 6 (35℃ ) and O. 151 mol/( L· rain) (50 ℃ ) , and the activation energy (Ea) was 76.66 kJ/mol. Rapid and complete deehlorination which was achieved for CB and 1,4-DCB was obtained at close to ambient conditions. And it was showed that microwave-assisted catalytic in-situ reductive dechlo- rination on Raney Ni-A1 alloy catalyst was an effective method to rapid and complete dechlorination for polychlorinated organic compounds. |
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Keywords: | 1, 4-dichlorobenzene Raney Ni-A1 alloy catalyst Microwave Dechlorination |
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