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Dry reforming of methane over Zr- and Y-modified Ni/Mg/Al double-layered hydroxides
Catalysis Communications ( IF 3.4 ) Pub Date : 2018-08-28 , DOI: 10.1016/j.catcom.2018.08.024
Katarzyna Świrk , Maria Elena Gálvez , Monika Motak , Teresa Grzybek , Magnus Rønning , Patrick Da Costa

Zr- and Y-promoted Ni/Mg/Al double-layered hydroxides were investigated in dry reforming of methane, DRM (10% CH4, CH4/CO2 = 1, GHSV = 20,000 h−1) for the first time. Modification of the double-layered hydroxides with 5 wt% of zirconium and 0.4 wt% of yttrium resulted in the formation of ZrO2-Y2O3 solid solution, which largely contributed to the enhancement of catalyst's stability with time-on-stream at 700 °C in DRM. Also, the modified catalyst demonstrated the limitation of the reverse WGS reaction, as confirmed by powder XRD due to the absence of the rhombohedral hydrotalcite structure.



中文翻译:

Zr和Y改性的Ni / Mg / Al双层氢氧化物上的甲烷干重整

首次在甲烷,DRM(10%CH 4,CH 4 / CO 2  = 1,GHSV = 20,000 h -1)的干重整中研究了Zr和Y促进的Ni / Mg / Al双层氢氧化物。用5 wt%的锆和0.4 wt%的钇对双层氢氧化物进行改性导致ZrO 2 -Y 2 O 3固溶体的形成,这在很大程度上提高了催化剂在运行时的稳定性。在DRM中为700°C。而且,由于不存在菱面体水滑石结构,因此通过粉末XRD证实了改性催化剂显示出WGS逆反应的局限性。

更新日期:2018-08-28
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