...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Energy Conversion & Management >Steam reforming of different biomass tar model compounds over Ni/Al2O3 catalysts
【24h】

Steam reforming of different biomass tar model compounds over Ni/Al2O3 catalysts

机译：Ni / Al2O3催化剂上不同生物质焦油模型化合物的蒸汽重整

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

This work focuses on the removal of the tar derived from biomass gasification by catalytic steam reforming on Ni/Al2O3 catalysts. Different tar model compounds (phenol, toluene, methyl naphthalene, indene, anisole and furfural) were individually steam reformed (after dissolving each one in methanol), as well as a mixture of all of them, at 700 degrees C under a steam/carbon (SIC) ratio of 3 and 60 min on stream. The highest conversions and H-2 potential were attained for anisole and furfural, while methyl naphthalene presented the lowest reactivity. Nevertheless, the higher reactivity of oxygenates compared to aromatic hydrocarbons profnoted carbon deposition on the catalyst (in the 1.5-2.8 wt.% range). When the concentration of methanol is decreased in the feedstock and that of toluene or anisole is increased, the selectivity to CO is favoured in the gaseous products, thus increasing coke deposition on the catalyst and decreasing catalyst activity for the steam reforming reaction. Moreover, an increase in Ni loading in the catalyst from 5 to 20% enhances carbon conversion and H2 formation in the steam reforming of a mixture of all the model compounds studied, but these values decrease for a Ni content of 40%. Coke formation also increased by increasing Ni loading, attaining its maximum value for 40% Ni (6.5 wt.%). (C) 2017 Elsevier Ltd. All rights reserved.
机译：这项工作的重点是通过在Ni / Al2O3催化剂上进行催化蒸汽重整来去除生物质气化产生的焦油。将不同的焦油模型化合物（苯酚，甲苯，甲基萘，茚，苯甲醚和糠醛）分别蒸汽重整（将每一种溶解在甲醇中）以及所有这些混合物的混合物，在蒸汽/碳下于700摄氏度进行重整（SIC）比率为3和60分钟。苯甲醚和糠醛的转化率和H-2电位最高，而甲基萘的反应性最低。然而，与芳族烃相比，含氧化合物的更高的反应性表明了碳在催化剂上的沉积（在1.5-2.8wt。％范围内）。当原料中甲醇的浓度降低而甲苯或茴香醚的浓度升高时，气态产物对CO的选择性有利，因此增加了焦炭在催化剂上的沉积并降低了蒸汽重整反应的催化剂活性。此外，催化剂中Ni的负载量从5％增加到20％可以提高所有研究的模型化合物混合物的蒸汽重整过程中的碳转化率和H2的形成，但是对于Ni含量为40％的情况，这些值会降低。焦炭的形成也通过增加镍的添加量而增加，达到40％Ni（6.5 wt。％）的最大值。 （C）2017 Elsevier Ltd.保留所有权利。

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