硅对白泥碳酸钙孔结构的影响研究  

Effect of Silicon on the Pore Structure of White Mud Calcium Carbonate

作　　者：夏新兴[1] 陈旭波[2] 李金宝[2] 康阳[2] 余小藏 

机构地区：[1]浙江理工大学材料与纺织学院,浙江杭州310018 [2]陕西科技大学轻工与能源学院,陕西西安710021

出　　处：《中国造纸》2015年第11期33-36,共4页China Pulp & Paper

基　　金：浙江理工大学科研启动基金(项目编号14012081-Y)资助

摘　　要：通过配制不同硅含量的模拟绿液,苛化生成白泥碳酸钙,运用氮吸附法测定其比表面积和孔结构特征,并用Frenkel-Halsey-Hill(FHH)模型分析其表面分形特征。结果表明,白泥碳酸钙比表面积随着硅含量的提高逐渐增大;孔体积也随着硅含量的增加而增加,且硅含量越大越有利于形成较小尺寸的孔。通过FHH模型计算其分形特征,发现随着硅含量的增加,碳酸钙表面分形维数增大,随着硅含量增加,碳酸钙表面形状逐渐由规则的谷粒状或方形变成不规则片形。The simulated green liquors containing different silicon contents were prepared, and used for producing calcium carbonate by cans- ticizing, the pore structure characteristics of the white mud calcium carbonate were determined by N2 adsorption, and the surface fractal char- acteristics were analyzed based on Frenkel-Halsey-Hill （FHH） model. The results showed that specific surface area and cumulative pore vol- ume of the calcium carbonate increaced gradually with increasing silicon, and silicon increase was in favor of forming small mesopore in calci- um carbonate. FHH model was used to analyze fractal characteristics of calcium carbonate, the results showed that the surface of calcium car- bonate changed gradually from regular form to irregular form with the increase of silicon content.

关 键 词：碳酸钙 硅含量 氮吸附 分形维数 

分 类 号：TQ132.32[化学工程—无机化工]