改性颗粒白土对玉米秸秆稀酸水解液脱色的研究.pdf

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改性颗粒白土对玉米秸秆稀酸水解液脱色的硏究
Study on the decolorization of corn straw
stalk dilute acid hydrolysate with modified particle clay
彭芬郭海军2张海荣2王璨杨会娟2陈新徳
(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)
中科院广州能源所げ眙凹土研发中心,江苏時211700)
PENG Feng GUO Hai-jun ZHANG Hai-rong WANG Can YANG Hui-juan CHEN Xin-de
( Angelou institule of energy conversion, Chinese academy of seienees, Guangdong Guanghu 510640. China
(Xuyi atlapulgite clay R&D)center, Guang ho instit f cnergy ersin, Jiangsu Xuyi 21 1700, hina
摘要采用酸化焙法对凹凸棒土进行了政性,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、担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1.5h、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,
増加孔道,置換其金属离子,改善表面特性;焙热活化可除去不同状态的水,疏通其通道,増大孔容
和比表面积,从而提高其吸附脱色能力
关键词颗粒白土;凹凸棒土;改性;脱色率;稀酸水解液
bstract 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. EE-SEM and so on. Result showed that the decolorization rate was best with calcination temperature 400 C, 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
Keywords particle clay; attapulgite; modification; decolorization rate; dilute acid
中图分类号:1S213.4
文献标识码:A
文章编号:1673-6044(2014)03-0023-05
DOI:10.3969/issn.1673-604.,2014.03.009
众所周知,玉米秸秆稀酸水解液中含有的杂质和色素,不仅使水解液黑色,影啊斤续糖发酵
基金项目:国家科技支撑计划(2012BAD32B07):町眙县人物色泽,而且对后续菌株糖发酵制备化工产品有严
民政府开放课题(20121004)。
重的抑制作用,故在发酵前必须被脱除。玉米秸种
彭芬,女,1987年出生,2013年毕业于太原理工大学化学稀酸水解液一般采用石灰乳中和吸附法、有机溶剂
工程与技术专业,研究实习员。
萃取法、真空浓缩法、离子交换法等进行脱色,可
陈新德,通讯作者,Emil:chenxi(@msgice.ac.cn.
改善水解液发酵性能,但这些方法工艺复杂且成本
收稿日期:2014-06-16
高,所以开发一种对玉米秸秆等纤维素稀酸水解液