稻壳炭基二氧化硅的提取及表征
Extraction and characterization of SiO_2 from rice-husk-char
查看参考文献23篇
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文摘
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以气化副产物稻壳炭为原料,以K_2CO_3作为提取剂制取SiO_2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:K_2CO_3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SiO_2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。 |
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其他语种文摘
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The objective of this study is to develop a simple and green procedure for preparing SiO_2 from rice husk char. The raw material, rice husk char from downdraft fixed bed gasification was used to extract SiO_2 by adding K_2CO_3. To find the influence of extraction and aging conditions on SiO_2 yield, the experiments were conducted. The results showed that the optimum conditions were as follows: the impregnation ratio of K_2CO_3 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, SiO_2 yield was 25.89% and purity 97.02% after acid treatment. The structure and property of SiO_2 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. |
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来源
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化工学报
,2014,65(8):3277-3282 【核心库】
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DOI
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10.3969/j.issn.0438-1157.2014.08.058
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关键词
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稻壳炭
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碳酸钾
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提取
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二氧化硅
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回收
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地址
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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
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0438-1157 |
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学科
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化学工业 |
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基金
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国家林业公益性行业科研专项
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国家科技支撑计划项目
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国家973计划
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高校优势学科建设工程项目
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文献收藏号
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CSCD:5207062
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