改性颗粒白土对玉米秸秆稀酸水解液脱色的研究  

Study on the decolorization of corn straw stalk dilute acid hydrolysatewithmodified particle clay

作　　者：彭芬[1,2] 郭海军[1,2] 张海荣[1,2] 王璨[1,2] 杨会娟[1,2] 陈新德[1,2] 

机构地区：[1]中国科学院广州能源研究所中国科学院可再生能源与天然气水合物重点实验室,广东广州510640 [2]中科院广州能源所盱眙凹土研发中心,江苏盱眙211700

出　　处：《食品工程》2014年第3期23-27,共5页Food Engineering

基　　金：国家科技支撑计划(2012BAD32B07);盱眙县人民政府开放课题(20121004)

摘　　要：采用酸化焙烧法对凹凸棒土进行了改性,通过单因素试验对其制备条件进行了优化,且采用N2吸附-脱附、X射线衍射、扫描电镜等表征手段对其脱色机理进行了研究。试验结果表明,经400℃焙烧1.5 h、15%酸化后的颗粒白土对玉米秸秆稀酸水解液的脱色效果最佳;酸活化可除去凹土中的杂质,增加孔道,置换其金属离子,改善表面特性;焙烧热活化可除去不同状态的水,疏通其通道,增大孔容和比表面积,从而提高其吸附脱色能力。The acidified calcined method was adapted to the modified attapulgite, and the optimized preparation con-ditions were obtained by the single factor experiment. The decoloring mechanism of particle clay was studied by BET, XRD, FE-SEM and so on. Result showed that the decolorization rate was best with calcination temperature 400℃, 1.5 hours ,and sulfuric acid concentration 15%. The acid activation could remove the impurity of the attapulgite to increase the channel and replace the metal ions to improve the surface properties;moreover the calcining thermal activation could remove the water during the attapulgite, and that could dredge the channel, increase the pore volume and the specific surface area, so as to improve the adsorption decolorizing ability of the particle clay.

关 键 词：颗粒白土 改性 脱色率 稀酸水解液 

分 类 号：TS213.4[轻工技术与工程—粮食、油脂及植物蛋白工程]