CeNiXAl0.5HZOY nano-oxyhydrides for H2 production by oxidative dry reforming of CH4 without carbon formation

The oxidative dry reforming of CH4 (ODRM) was studied at 500 - 800 degrees C in harsh conditions (CH4/CO2/O-2/N-2 = 1:0.7:alpha:N-2 with 20 % of CH4, 96,000 mLh(-1) g(cat)(-1 )and a varying from 0 up to 0.5) on CeNiXAl0.5HZOY (0.5 <= x <= 5) nano-oxyhydride catalysts. At low temperature (500 - 600 degrees C), the conversion of CH4 reaches the thermodynamic limit while those of CO2 overcomes the predicted value in particular at 500 degrees C. M 600 degrees C with an O-2/CH4 ratio of 0.3, the CeNiXAl0.5HZOY catalyst allows getting CH4 and CO2 conversions of about 63 % and 50 %, respectively, and a H-2/CO ratio of about 1.3, without carbon formation. The physico-chemical characterizations performed before and after test show the existence of strong interactions existing between Ni2+ cations with other cations and the presence of nano-oxyhydride compound. The mixed oxide based nano-materials corresponding to hydride reservoirs with the presence of Ni2+ cations are shown to be highly active, selective and stable catalysts.