Pt/Al2O3在生物油轻质组分水相重整制氢反应中的稳定性

生物油轻质组分中水的质量分数高达85%，除水困难，弃之浪费又造成污染. 采用水相重整的方法可充分利用这部分物质，得到宝贵的氢气资源. 实验室以Pt/Al2O3为催化剂，可得到757 mL的气体，并且氢气的体积分数高达65.86%. 由于Pt为贵金属催化剂，研究其在反应过程中的稳定性非常必要. 为此，对反应后的催化剂进行了XRD、TEM、SEM和TPO表征，发现其性质发生了较大的改变. 将催化剂煅烧处理后进行重复试验，发现其催化活性和对氢气的选择性均明显下降，即Pt/Al2O3在生物油轻质组分水相重整制氢反应体系中的稳定性较差，难以重复利用.

The stability of Pt/Al2O3 in the aqueous phase reforming of the low boiling fraction of bio oil for hydrogen production

The low boiling fraction(LBF) of bio oil contains about 85% water, which is difficult to remove completely. Nevertheless, abandoning it is not only a waste but also a pollutant to our environment. Then, aqueous phase reforming (APR) is a promising way to categorise it as resource rather than waste. Using Pt/Al2O3 as catalyst, 757 mL gas product was gained and at the same time the selectivity of H2 reached 65.86%. Considering the high price of Pt, it was necessary to study the stability of Pt/Al2O3 during this reaction. The used catalyst was characterized by X ray diffraction(XRD), transmission electron microscopy(TEM), scan electron microscope(SEM) and temperature programmed oxidation(TPO). It demonstrated that after reaction the properties of catalyst changed a lot. After calcining in air, the recycle use of catalyst was tested. However, the catalytic activity and selectivity of H2 dropped down substantially for subsequent APR runs. That is to say, the stability of Pt/Al2O3 is poor during APR of LBF.