Microfibrous entrapped Ni/Al2O3 using SS‐316 fibers for H2 production from NH3
Microfibrous entrapped Ni/Al2O3 using SS‐316 fibers for H2 production from NH3
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DOI：
10.1002/aic.11208
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发表时间：
2007-07
期刊：
影响因子：
3.7
通讯作者：
Ye Liu;Hong Wang;Jianfeng Li;Yong Lu;Qingsong Xue;Jinchun Chen
中科院分区：
文献类型：
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作者：
Ye Liu;Hong Wang;Jianfeng Li;Yong Lu;Qingsong Xue;Jinchun Chen
采用高速、低成本的造纸技术，结合后续的烧结工艺，利用由∼2vol%的6μm直径的SS-316微纤维组成的烧结体锁定三维微纤维网络包裹∼25vol%的100-200μm直径的多孔氧化铝载体颗粒。镍是分解氨气的最活跃组分，采用初湿浸渍的方法将镍分散到载体颗粒的孔表面。制得的微纤维催化剂具有大的空隙体积、完全开放的结构、高的热质传递、良好的热稳定性和独特的形状因子，因此具有良好的氨分解活性，并显著降低了总床重和体积。这种复合床反应器在650°C时，每立方米床容可生产215立方米氢气，氨转化率为99.5%。
Using a high-speed and low-cost papermaking technology combined with subsequent sintering process, sinter-locked three-dimensional microfibrous networks consisting of ∼2 vol % of 6-μm-diameter SS-316 microfibers were utilized to entrap ∼25 vol % of 100–200-μm-diameter porous Al2O3 support particulates. Nickel, a most active component for ammonia decomposition, was then dispersed onto the pore surface of the entrapped Al2O3 support particulates by incipient wetness impregnation method. The resulting microfibrous catalysts took advantage of large void volume, entirely open structure, high heat/mass transfer, good thermal stability, and unique form factors, thereby leading to good activity for ammonia decomposition and significant reduction of overall bed weight and volume. This composite bed reactor was capable of producing 215 sccm hydrogen over per cm3 bed volume with ammonia conversion of 99.5% at 650°C. © 2007 American Institute of Chemical Engineers AIChE J, 2007