黄金科学技术 ›› 2022, Vol. 30 ›› Issue (2): 291-301.doi: 10.11872/j.issn.1005-2518.2022.02.138
郄博洋1,2,3(),李沛1,2,3,苗腾飞4,白杨4,汤家焰1,2,3,曹钊1,2,3(
)
Boyang QIE1,2,3(),Pei LI1,2,3,Tengfei MIAO4,Yang BAI4,Jiayan TANG1,2,3,Zhao CAO1,2,3(
)
摘要:
针对载金用活性炭热再生能耗高、耗时长、炭损高和活化程度低等问题,基于炭材料良好的吸波性,开展微波辐照再生活性炭的试验研究。单因素试验表明活化效果与再生温度呈正相关,再生温度以650~750 ℃为宜;贫炭水份以30%左右为佳,过高或过低均会降低活化效果,可能与介电能力相关;多次辐照作业只有在高温时(≥700℃)有明显作用。相比热再生技术,达到同等活化程度时,新技术节能30%~50%,且炭损更少。在700 ℃、30%水份条件下微波再生炭碘值接近新炭。在之后的酸洗作业中,微波再生炭更易被清理,元素和物相分析表明炭中的CaO等无机污染物被大量去除。BET测试和SEM表征显示微波再生炭的比表面积和总孔容比热再生炭更高、孔道更粗,支持了上述结论。
中图分类号:
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