• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International Tropical Renewable Energy Conference >Preparation and characterization of activated carbon from corn stalks by chemical activation with KOH and NaOH
【24h】

Preparation and characterization of activated carbon from corn stalks by chemical activation with KOH and NaOH

机译：用KOH和NaOH化学活化的玉米秸秆活性炭的制备与表征

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

One potential raw material is corn stalk with a composition of 34.4% lignin, 33.1% cellulose, 28.9% hemicellulose. The stages of making activated carbon begin with sample preparation namely cleaning, washing, drying and refining. Corn stalks will be processed with 2 stages of carbonization. The first stage will experience carbonization at 500°C for 1 and half hour. In the second stage will be carried out variations of activator agents while varying activation temperatures with the aim of getting the best carbon characteristics. The char produced from carbonization step will be activated chemically and will be mixed with 25% b/v KOH and NaOH solution with a weight ratio of 1: 4.2. Then proceed with physics-chemical activation using gas N_2 with a flow rate of 300 ml / second in a temperature furnace reactor varied in the range 650-750°C. Characterization of activated carbon was carried out using the iodine number test, Scanning Electron Microscopy test, and Energy Dispersive X-ray Spectroscopy test. The best characteristics of activated carbon are measured by Iodine numbers to represent surface area. The variation in temperature resulting in iodine numbers is directly proportional for activation by KOH, but precisely inversely with NaOH. The best activated carbon was produced by chemical activation with KOH at temperature of 750°C with an overall yield of 24.3%. and Iodine number of 602 mgI_2/g.
机译：一种潜在的原料是玉米秸秆，组合物为34.4％木质素，33.1％纤维素，28.9％的半纤维素。使活性炭的阶段以样品制备开始清洁，洗涤，干燥和精炼。玉米秸秆将被加工2个碳化阶段。第一阶段将在500℃下经历碳化1和半小时。在第二阶段将进行活化剂试剂的变化，同时改变激活温度，目的是获得最佳碳特性。从碳化步骤中产生的炭化将在化学上激活，并将与25％B / V KOH和NaOH溶液混合，重量比为1：4.2。然后使用气体N_2进行物理化学活化，在温度炉反应器中的300ml /秒的流速在650-750℃的范围内变化。使用碘值试验，扫描电子显微镜试验和能量分散X射线光谱试验进行活性炭的表征。活性炭的最佳特性通过碘数字测量以表示表面积。导致碘数字的温度变化对于通过KOH的激活直接成比例，但恰好与NaOH相反。通过在750℃的温度下用KOH的化学活化产生最佳的活性炭，总收率为24.3％。和碘量为602 mgi_2 / g。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号