掺杂铜锌铝介孔材料的合成、表征及其在甲醇重整制氢中的应用

Synthesis and Characterization of Cu-Zn-Al Doped Mesoporous Materials and Application in Reforming of Methanol for H_2 Production

分别以正硅酸乙酯(TEOS)和Na2SiO3为硅源,室温合成了Cu∶Zn∶Al∶Si摩尔比为6∶3∶5∶100的类MCM-41催化剂,以XRD、N2吸附、氨吸附量热及异丙醇脱水/脱氢反应等表征了催化剂的性质.结果表明,两种催化剂均具有较好的介孔结构,以Na2SiO3为硅源的催化剂具有较强的酸性.甲醇水蒸气重整反应表明,以TEOS为硅源的催化剂对甲醇转化率和H2选择性均高于以Na2SiO3为硅源的催化剂.

The MCM-41-like catalysts of 6Cu/3Zn/5Al/100Si（mol ratio） were synthesized at room temperature （RT） with TEOS and Na2SiO3 as Si sources. XRD and N2 adsorption results suggested that both catalysts had the ordered mesoporous structures. Microcalorimetric adsorption of NH3 and isopropanol probe reaction indicated that the catalyst synthesized with Na2 SiO3 showed higher acidity. The catalyst synthesized with TEOS exhibited higher activity for methanol conversion and selectivity to H2 in reforming of methanol for H2 production.