稻壳炭基二氧化硅的提取及表征

doi:10.3969/j.issn.0438-1157.2014.08.058

化工学报 ›› 2014, Vol. 65 ›› Issue (8): 3277-3282.DOI: 10.3969/j.issn.0438-1157.2014.08.058

• 材料化学工程与纳米技术 • 上一篇下一篇

稻壳炭基二氧化硅的提取及表征

顾洁¹, 刘斌², 方放², 马中青¹, 张齐生¹, 周建斌¹

1 南京林业大学竹材工程研究中心, 江苏南京 210037;
2 南京林业大学化学工程学院, 江苏南京 210037

收稿日期:2013-11-25 修回日期:2013-12-20 出版日期:2014-08-05 发布日期:2014-08-05
通讯作者: 张齐生
基金资助:
林业公益性行业科研专项项目（201304611）；国家科技支撑计划项目（2012BAD30BOO）；国家重点基础研究发展计划项目（2010CB732205）；高校优势学科建设工程项目。

Extraction and characterization of SiO₂ from rice-husk-char

GU Jie¹, LIU Bin², FANG Fang², MA Zhongqing¹, ZHANG Qisheng¹, ZHOU Jianbin¹

1 Bamboo Engineering and Research Center, Nanjing Forestry University, Nanjing 210037, Jiangsu, China;
2 College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, Jiangsu, China

Received:2013-11-25 Revised:2013-12-20 Online:2014-08-05 Published:2014-08-05
Supported by:
supported by the National Forestry Public Welfare Industry Research Project(201304611), the Technology Support Program of Jiangsu Province(2012BAD30BOO) and the National Basic Research Program of China (2010CB732205).

摘要/Abstract

摘要： 以气化副产物稻壳炭为原料，以K₂CO₃作为提取剂制取SiO₂产品，考察了提取工艺和陈化工艺对产品得率的影响。得到最优工艺：K₂CO₃质量分数为20%，浸渍比为3.0，煮溶时间为3.5 h，陈化温度为3℃，陈化时间为3 h。最优工艺下制备的SiO₂得率为25.89%，酸处理后纯度为97.02%。采用场发射扫描电子显微镜（SEM）、X射线能谱仪（EDX）、X射线衍射仪（XRD）等对产品的性能进行了表征。

关键词: 稻壳炭, 碳酸钾, 提取, 二氧化硅, 回收

Abstract: The objective of this study is to develop a simple and green procedure for preparing SiO₂ from rice husk char. The raw material, rice husk char from downdraft fixed bed gasification was used to extract SiO₂ by adding K₂CO₃. To find the influence of extraction and aging conditions on SiO₂ yield, the experiments were conducted. The results showed that the optimum conditions were as follows: the impregnation ratio of K₂CO₃ solution (mass fraction of 20%) to rice husk char was 3.0, the extraction time 3.5 h. The temperature and time of aging was 3℃ and 3 h, respectively. At these conditions, SiO₂ yield was 25.89% and purity 97.02% after acid treatment. The structure and property of SiO₂ were analyzed using SEM, EDX, and XRD. The results indicated that it could be a practical way for the high efficiency, environmental-friendly and resource utilization of rice husk char.

Key words: rice husk char, K₂CO₃, extraction, SiO₂, recycling

中图分类号:

TQ127.2

顾洁, 刘斌, 方放, 马中青, 张齐生, 周建斌. 稻壳炭基二氧化硅的提取及表征[J]. 化工学报, 2014, 65(8): 3277-3282.

GU Jie, LIU Bin, FANG Fang, MA Zhongqing, ZHANG Qisheng, ZHOU Jianbin. Extraction and characterization of SiO₂ from rice-husk-char[J]. CIESC Journal, 2014, 65(8): 3277-3282.

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稻壳炭基二氧化硅的提取及表征

Extraction and characterization of SiO₂ from rice-husk-char

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稻壳炭基二氧化硅的提取及表征

Extraction and characterization of SiO2 from rice-husk-char

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Extraction and characterization of SiO₂ from rice-husk-char