微波制备花生壳纤维炭的性能表征及应用

以废弃花生壳为原材料,经微波微炭化制备成硬质的花生壳纤维炭,表述了原材料随着温度在150~350℃的逐步升高,由淡黄色先变成黑色又进一步变成灰白色试验现象,研究了花生壳的质量损失规律及炭化产率,测试了约3 cm2长方表面积的纤维炭拉力由2.63 kg减小为0。静态吸附仪和SEM电镜测试表明,250℃微波炉烧制的花生壳纤维炭表面积相对较小,孔径和孔体积较大。采用该硬质的花生壳纤维炭为吸附催化载体,再利用流化床处理含氰废水。水处理试验结果表明:流速在150 mL/min时对氰化物处理效果最好;当流化床循环时间为150 min时微炭化温度为250℃的花生壳纤维炭对氰化物去除率最高;使用10%磷酸活化后的花生壳纤维炭处理含氰废水效果较好,去除率较高。

Function characterization and application of microwave synthesized peanut shell fibre carbon

Stereoplasm peanut shell fibre carbon was synthesized by microwave and micro carbonization making use of wasted peanut shells. The paper states the fact that the raw materials change color from yellowish to black and further to gray with the temperature increasing from 150 ℃ to 350℃. The mass loss regularity and carbonization yield of peanut shells are studied. It is found that the 2.63 kg tension in 3 cm2 fibre carbon disappears. Static adsorption an- alyzer and SEM indicate that the surface area will relatively be smaller and the hole diameter and volume of the holes will be larger. The stereoplam peanut shell fibre carbon is taken as the carrier of catalysts. Cyanide water is treated in fluidized bed. The treatment indicates that effects are the best when flow speed is 150 mL/min;if the cycling time of fluidized bed is 150 min ,the cyanide removal rate is the best when the micro carbonization temperature is 250℃ ; activated by phosphoric acid of 10 % concentration, the peanut shells display better abilities to treat cyanide wastewater.