期刊
CATALYSIS LETTERS
卷 132, 期 1-2, 页码 213-217出版社
SPRINGER
DOI: 10.1007/s10562-009-0094-9
关键词
Hexaaluminates; Catalyst; Methane; Syn gas
Ca1-x La (x) NiAl11O19-delta(O a parts per thousand currency sign xa parts per thousand currency sign1) hexaaluminate oxydes were synthesized starting from nitrate salts of Ca, La, Ni and Al precipitated by citric acid. After calcination they were used as catalysts precursors in dry reforming of methane to synthesis gas at atmospheric pressure (600-800 A degrees C) with a mixture of CH4/CO2/Ar:1/1/3. The solids were characterized by X-ray diffraction (XRD), BET surface area, temperature programmed reaction and oxidation (TPO) and by X-ray photoelectron spectroscopy. XRD analysis shows a pure hexaluminate phase as soon as a part of calcium has been substituted by lanthanum. After H-2 reduction and after reactivity test, Ni metal characterized by XRD is responsible of the high activity (equilibrium conversion near 100% at 800 A degrees C). Ni hexaaluminate shows a remarkable high stability (more than 300 h test) probably due to the low formation of surface carbon (TPO).
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据