摘要
笔者采用微波加热的方式以松木片为原料、KOH为活化剂制备活化生物质炭,探索了3种不同KOH/生物质炭的配比(0.5、1.5和3.0)条件下的活化生物质炭的孔结构和甲苯吸附量。甲苯吸附量的测试采用了一种简便、高效、环保和廉价的方法。结果表明,配比为3.0的活化生物质炭达到最高的比表面积2044m^2/g,微孔比表面积也达到最高值1712m^2/g。对不同浓度的甲苯进行吸附,在甲苯浓度为400ppmv时,配比为3.0的活化生物质炭显示了最大的吸附量56.0%。而对高浓度甲苯吸附,配比为3.0的活化生物质炭的吸附量则可达到71.9%,并且其吸附等温线数据能很好的拟合DQSAR吸附模型。
The study presents the preparation of activated biochar from pinechips by chemical activation using KOH and microwave heating. The effect of KOH/biochar mass ratio （0.5, 1.5 and 3.0） on toluene adsorption ca- pacity along with the physical characteristics of activated biochar is investigated and compared. The biochar activated under a KOH/biochar mass ratio of 3.0 shows the highest adsorption capacity of 56% at a toluene concentration of 400 ppm （v）, having the greatest BET surface area of 2 044m^2/g amongst the three studied ratios. At higher concentrations of toluene, activated hiochar with a KOH/biochar ratio of 3.0 reaches a higher adsorption capacity of 71.9%. Toluene adsorption isotherms investigated for all produced activated biochars with different KOH/hiochar ratios fit the QSAR isotherm equation well.
出处
《林产工业》
北大核心
2012年第3期30-34,共5页
China Forest Products Industry
