Influence of Ni/SiO2 catalyst preparation methods on hydrogen production from the pyrolysis/reforming of refuse derived fuel
Influence of Ni/SiO2 catalyst preparation methods on hydrogen production from the pyrolysis/reforming of refuse derived fuel
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DOI：
10.1016/j.ijhydene.2014.01.150
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发表时间：
2014-04
影响因子：
7.2
通讯作者：
P. Blanco;Chunfei Wu;Paul T. Williams
中科院分区：
文献类型：
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作者：
P. Blanco;Chunfei Wu;Paul T. Williams
采用Ni/ sio2催化剂对垃圾衍生燃料（RDF）热解/重整制氢进行了研究。采用溶胶-凝胶法（HPG）均相沉淀法制备了催化剂，并与在HPG工艺中添加相分离步骤制备的Ni/ sio2催化剂（B-HPG）进行了比较。所有催化剂的NiO负载均为10 wt.%，每种方法使用三种不同的煅烧温度（500℃，700℃和900℃）。对制备的Ni/ sio2催化剂进行了分析，测定了其比表面积和孔隙率特征；另外进行了扫描电镜（SEM-EDX）、透射电镜（TEM）、红外光谱（FTIR）和x射线衍射（XRD）分析。结果表明，HPG制备的催化剂在700℃下煅烧（HPG700），具有较高的表面积（~ 347 m2g−1），大孔径（12.50 nm），并且对h2产氢具有最高的催化活性，达到~ 60 vol.%的氢气。在900℃下煅烧（B-HPG900），采用hpg相分离联合法制备的催化剂氢浓度最低，约为42 vol.%。还观察到，当煅烧温度高于700℃时，两种制备方法的催化产氢活性都降低了。
Hydrogen production from the pyrolysis/reforming of refuse derived fuel (RDF) was investigated with a series of Ni/SiO2catalysts. The catalysts were prepared by homogeneous precipitation derived from a sol–gel method (HPG) and compared to Ni/SiO2catalysts prepared by adding a phase separation step to the HPG process (B-HPG). All the catalysts had a NiO loading of 10 wt.%, and three different calcination temperatures (500 °C, 700 °C and 900 °C) were used for each method. The prepared Ni/SiO2catalysts were analysed to determine their surface area, and porosity characteristics; additionally scanning electron microscopy (SEM-EDX), transmission electron microscopy (TEM), infrared spectroscopy (FTIR), and X-Ray diffraction (XRD) analyses were carried out. The results showed that the catalyst prepared by HPG and calcined at 700 °C (HPG700), presented a relatively high surface area (∼347 m2g−1), large pore diameter (12.50 nm), and also resulted in the highest catalytic activity towards H2production, attaining ∼60 vol.% hydrogen. The lowest hydrogen concentration of about 42 vol.% was obtained using the catalysts prepared by the combined HPG-phase separation method, and calcined at 900 °C (B-HPG900). It was also observed that at calcination temperatures higher than 700 °C the catalytic activity for hydrogen production was diminished for both preparation methods.