Influence of Mn, Mg, Ce and P promoters on Ni-X/Al2O3 catalysts for dry reforming of methane

二氧化碳重整 催化作用 甲烷 焦炭 无机化学 化学 碳纤维 热重分析 空间速度 甲烷转化炉 合成气 核化学 材料科学 蒸汽重整 有机化学 选择性 制氢 复合数 复合材料
作者
Fernando V. Maziviero,Dulce Maria de Araújo Melo,Rodolfo L.B.A. Medeiros,J. C. Silva,Tomaz Rodrigues de Araújo,Ângelo A.S. Oliveira,Yuri K.R.O. Silva,Marcus A.F. Melo
出处
期刊:Journal of The Energy Institute [Elsevier BV]
卷期号:113: 101523-101523 被引量:7
标识
DOI:10.1016/j.joei.2024.101523
摘要

In this work, the performance of a series of nickel catalysts supported on alumina containing the promoters Mg, Mn, Ce and P was evaluated against the dry reforming of methane (DRM). Alumina support was obtained quickly and simply through the microwave-assisted combustion method using low levels of urea. The catalysts were characterized by XRD, TPR, FTIR and XRD in situ, proving that successive hydration and heat treatment steps during synthesis can generate modifications in the alumina phases, in addition to the formation of aluminate species that are reduced during the catalytic activation step and modify the level of interaction between active and support phases. The catalytic activity test was performed with GHSV = 100 L g−1 h−1 and the formed carbon was quantified by thermo gravimetric analysis. The Mn promoter exhibited the highest methane conversion rate during the initial stages of the reaction, in which the presence of MnO2 favored parallel reactions of methane decomposition. The phosphorus and cerium produced smaller amounts of coke, reducing the carbon generated due to the interaction of promoters with carbon on the surface of the catalytic sites. The Mg increases the interaction of the active phase with the support.
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