生物油催化重整制氢过程中催化剂的失活与再生

对生物油在流化床反应器中催化重整制氢过程中催化剂的失活与再生进行了研究。对工业级镍基催化剂(w(NiO)=7.2%)的连续催化及循环失活再生研究表明,催化剂的比表面积、孔径及活性随催化剂失活次数的增加而降低。通过TG-DSC,XRD,SEM等技术分析催化剂失活的原因时发现,失活催化剂上有少量积碳,且随催化剂失活次数的增加而略有增加,但这不是催化剂失活的主要原因;催化剂失活主要是因为NiO晶粒在载体表面烧结长大、使其分散度降低造成的。

Deactivation and Regeneration of Catalyst for Steam Reforming of Bio-Oil to Produce Hydrogen

Both deactivation and regeneration of the catalyst for catalytic steam reforming of bio-oil to produce hydrogen were studied.The fresh catalyst and the used catalysts were analyzed by means of XRD,TG-DSC and SEM.The catalytic reforming,deactivation and regeneration cycles of the industrial nickel catalyst with w(NiO)7.2% showed that all its BET surface area,average pore diameter and activity reduced with increase of using times of the catalyst.TG-DSC,XRD and SEM results indicated that the carbon deposition was not the main reason for the catalyst deactivation.The main reason for the fresh catalyst deactivation was sintering of the NiO particles on the support surface.