...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Waste management & research >Practical achievements on biomass steam gasification in a rotary tubular coiled-downdraft reactor
【24h】

Practical achievements on biomass steam gasification in a rotary tubular coiled-downdraft reactor

机译：旋转管式旋降反应器中生物质蒸汽气化的实践成果

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Today, the impending stringent environmental norms and concerns about the depletion of fossil fuel reserves have added impetus on development of cutting edge technologies for production of alternative fuels from renewable sources, like biomass. The concept of biomass pyro-gasification offers a platform for production of (a) hydrogen, (b) hydrocarbons and (c) value added chemicals, etc. In this context, there exists potential for hydrogen production from biomass by superheated steam gasification. Apart from H_2, gaseous products of biomass steam gasification contain CO, CH_4 and other hydrocarbons that can be converted to hydrogen through cracking, steam reforming and water gas shift reactions. In the present work, the characteristics of biomass steam gasification in an indigenously designed rotary tubular coiled-downdraft reactor for high value gaseous fuel production from rice husk was studied through a series of experiments. The robust reactor system enhances biomass conversion to gaseous products by improved mass and heat transfer within the system induced by a coiled flow pattern with increased heat transfer area. Also, the system has improved upon the reliability of operation and offered greater continuity of the process and easier control in comparison with a conventional process by making use of an innovative gas cooler assembly and efficient venturi-mixing system for biomass and steam. Subsequently, the effects of reactor temperature, steam-to-biomass ratio and residence time on overall product gas yield and hydrogen yield were investigated. From the experimental results, it can be deduced that an optimum reactor temperature of 750 ℃, steam-to-biomass ratio of 2.0 and a residence time of 3.0min contributed highest gas yield (1.252Nm~3 kg~(-1) moisture-free biomass). Based on the obtained experimental results, a projected potential hydrogen yield of 8.6 wt% of the moisture-free biomass could be achieved, and is also practical for production of pure hydrogen.
机译：如今，迫在眉睫的严格环境规范和对化石燃料储量枯竭的担忧为开发利用可再生资源（例如生物质）生产替代燃料的尖端技术提供了动力。生物质热气化的概念为生产（a）氢，（b）碳氢化合物和（c）增值化学品等提供了平台。在这种情况下，存在通过过热蒸汽气化从生物质生产氢的潜力。除H_2外，生物质蒸汽气化的气态产物还包含CO，CH_4和其他可通过裂化，蒸汽重整和水煤气变换反应转化为氢的烃。在目前的工作中，通过一系列实验研究了在本地设计的旋转管式螺旋下浮反应器中利用稻壳生产高价值气态燃料的生物质蒸汽气化特性。坚固的反应器系统通过盘绕流型引起的传热面积增加，改善了系统内的质量和传热，从而提高了生物质向气态产物的转化率。而且，与传统方法相比，该系统通过使用创新的气体冷却器组件和有效的生物质和蒸汽文丘里混合系统，提高了操作的可靠性，并提供了更大的过程连续性和更易于控制。随后，研究了反应器温度，蒸汽/生物质比和停留时间对总产物气产率和氢产率的影响。从实验结果可以得出，最佳反应器温度为750℃，蒸汽生物量比为2.0，停留时间为3.0min导致了最高的产气量（1.252Nm〜3 kg〜（-1）水分-游离生物质）。基于获得的实验结果，可以实现预计的无水生物质的8.6 wt％的潜在氢产率，并且对于生产纯氢也是可行的。

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