In this study, the potential of attapulgite (ATTP) as the support of nickel catalysts for steam reforming of acetic acid to produce hydrogen were evaluated. Ni/Al₂O₃ was prepared and evaluated for comparison. The results showed that ATTP had a much lower specific surface area and a lower thermal stability than alumina. Nevertheless, the interaction between nickel and ATTP was much weaker than that of nickel with alumina. As a result, the Ni/ATTP catalyst had superior activity than the Ni/Al₂O₃ catalyst, especially at low nickel loading. Ni/Al₂O₃ was more stable than Ni/ATTP. The fibrous coke, which was probably catalytic coke, formed over Ni/Al₂O₃ did not cause the rapid deactivation of the catalyst, while the amorphous coke formed over Ni/ATTP catalyst, which was probably the polymeric coke, rapidly deactivated the catalyst. The coke species contained COOH, CO, aliphatic structure and aromatic ring structures. In addition, the effects of these two carriers on the steam reforming mechanism were investigated by the in-situ DRIFTS.

在这项研究中，对凹凸棒石（ATTP）作为镍催化剂的载体进行了潜力评估，该催化剂用于乙酸蒸汽重整以生产氢气。制备Ni / Al ₂ O ₃并进行比较评估。结果表明，ATTP比氧化铝具有更低的比表面积和更低的热稳定性。尽管如此，镍与ATTP之间的相互作用远弱于镍与氧化铝之间的相互作用。结果，Ni / ATTP催化剂具有比Ni / Al ₂ O ₃催化剂优异的活性，特别是在低镍负载下。Ni / Al ₂ O ₃比Ni / ATTP更稳定。在Ni / Al ₂ O上形成纤维状焦炭，可能是催化性焦炭_图3所示的催化剂没有引起催化剂的快速失活，而在Ni / ATTP催化剂上形成的无定形焦炭（可能是聚合物焦炭）使催化剂快速失活。焦炭种类包含COOH，CO，脂族结构和芳族环结构。另外，通过原位DRIFTS研究了这两种载体对蒸汽重整机理的影响。