Cu-impregnated alumina/silica bed materials for Chemical Looping Reforming of biomass gasification gas
Cu-impregnated alumina/silica bed materials for Chemical Looping Reforming of biomass gasification gas
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DOI：
10.1016/j.fuel.2016.04.024
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发表时间：
2016-09
期刊：
影响因子：
7.4
通讯作者：
M. Keller;Jason Fung;H. Leion;T. Mattisson
中科院分区：
文献类型：
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作者：
M. Keller;Jason Fung;H. Leion;T. Mattisson
来源于低温生物质气化的原料气通常含有被称为“焦油”的可冷凝烃以及其它烃如乙烯和其它烯烃。最近已经提出了通过化学回路重整来重整这些化合物。在这项工作中，铜负载在四个不同的Al 2 O3/SiO2基多孔载体材料进行了研究，用于重整乙烯。所研究的颗粒通过用硝酸铜溶液初始润湿浸渍多孔载体然后煅烧来制造，然后在600 °C至850 °C的温度下在小规模流化床反应器中进行测试。乙烯转化率被发现强烈抑制气体中的芳烃的存在。然而，发现负载在商业PURALOX过渡氧化铝催化剂上的Cu表现出上级性能，即使在芳族化合物存在下也可实现高乙烯转化率。在本工作的实验条件下，在高浓度苯存在下，在T = 850 °C时，乙烯转化率高达90%。对于其它制备的材料，当进料中存在单芳族化合物时，乙烯转化率急剧降低。
Raw gas derived from low-temperature biomass gasification usually contains condensable hydrocarbons referred to as “tars” as well as other hydrocarbons such as ethylene and other olefins. Reforming of these compounds via Chemical Looping Reforming has been recently proposed. In this work Cu supported on four different Al2O3/SiO2-based porous support materials were investigated for reforming of ethylene. The investigated particles were manufactured by incipient wetness impregnation of the porous support with a copper nitrate solution followed by calcination, and then tested in a small-scale fluidized bed reactor at temperatures between 600 °C and 850 °C. The ethylene conversion was found to be strongly inhibited by the presence of aromatics in the gas. However, it was found that Cu supported on commercial PURALOX transition alumina catalyst exhibited superior properties, with high degrees of ethylene conversion achievable even in the presence of aromatic compounds. Under the experimental conditions in this work, up to 90% ethylene conversion was obtained atT= 850 °C in the presence of high concentrations of benzene. For the other prepared materials, the ethylene conversion was drastically reduced when monoaromatic compounds were present in the feed.