首页> 外文期刊>Colloids and Interfaces >Fabrication and Fractality of Fe2O3-CeO2/ZSM-5 Composites for High-Temperature Desulfurization
【24h】

Fabrication and Fractality of Fe2O3-CeO2/ZSM-5 Composites for High-Temperature Desulfurization

机译:高温脱硫用Fe2O3-CeO2 / ZSM-5复合材料的制备与分形

获取原文
           

摘要

Fe2O3/ZSM-5 modified with Ce via citrate route (sol-gel approach) is applied for H2S removal in 500a??700 ?°C temperature range. The sulfidation activity of Fe2O3/ZSM-5 is appreciably promoted by introduction of Ce plausibly attributed to the synergy of Fe2O3 and CeO2. 5Fe5Ce/ZSM-5 performs the optimal desulfurization behavior at 600 ?°C with sulfur capacity of 1020 ??mol S/g, and the sulfidation process conforms to non-catalytic gas-solid redox reaction mechanism, which yields FeS2, Ce2S3, and S. Fractal analysis is introduced to evaluate the surface porous structure and the adsorption capacity of the sorbent. Its surface fractal dimension is estimated by using Frenkel-Halsey-Hill (FHH) model. It considerably increases after sulfidation plausibly attributed to the formation of a few heterogeneous sulfides or elemental sulfur, which block or cover the surface pore structures of sorbents.
机译:经柠檬酸盐途径(溶胶-凝胶法)用铈改性的Fe2O3 / ZSM-5可在500a?700?C的温度范围内脱除H2S。 Fe2O3 / ZSM-5的硫化活性明显地通过引入Ce来促进,这可能归因于Fe2O3和CeO2的协同作用。 5Fe5Ce / ZSM-5在600°C时表现出最佳的脱硫性能,硫容量为1020 mol S / g,硫化过程符合非催化的气固氧化还原反应机理,生成FeS2,Ce2S3和引入分形分析来评估表面多孔结构和吸附剂的吸附能力。通过使用Frenkel-Halsey-Hill(FHH)模型估计其表面分形维数。硫化后,它的明显增加可能是由于形成了一些异质硫化物或元素硫,这些硫化物或元素硫阻塞或覆盖了吸附剂的表面孔结构。

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