Design, synthesis and characterization of vanadia-doped iron-oxide pillared montmorillonite clay for the selective catalytic oxidation of H2S
Design, synthesis and characterization of vanadia-doped iron-oxide pillared montmorillonite clay for the selective catalytic oxidation of H2S
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DOI：
10.1039/c0dt01144d
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发表时间：
2011-01-01
影响因子：
4
通讯作者：
Park, Dae-Won
中科院分区：
文献类型：
--
作者：
Bineesh, Kanattukara Vijayan;Kim, Dong-Kyu;Park, Dae-Won
制备了一系列不同钒含量的钒掺杂氧化铁柱撑粘土（V/Fe-PILC），并考察了它们对H2S选择性催化氧化的性能。采用X射线衍射（XRD）、比表面积和孔体积测量、化学分析、傅里叶变换红外光谱（FTIR）、X射线光电子能谱（XPS）和H-2程序升温还原（H-2-TPR）等方法对V/Fe-PILCs进行了表征。V/Fe-PILC具有比Fe-PILC更好的催化性能，没有任何显着的SO2排放。在V/Fe-PILC上的H2S转化率随着钒含量的增加而增加，直到7 wt.%。然而，它降低在较高的氧化钒负载由于表面积的减少和形成的结晶V2 O 5相。反应物混合物中水蒸气的存在导致H2S转化率降低。
A series of vanadia-doped iron-oxide-pillared clays (V/Fe-PILCs) with various amounts of vanadia were prepared and their performance for the selective catalytic oxidation of H2S was investigated. V/Fe-PILCs were characterized using X-ray diffraction (XRD), surface area-and pore volume measurements, chemical analysis, Fourier-transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and temperature-programmed reduction by H-2 (H-2-TPR). V/Fe-PILCs showed better catalytic performance than Fe-PILC without any significant SO2 emissions. The H2S conversion over V/Fe-PILCs increased with increasing vanadia content up to 7 wt.%. However, it decreased at higher vanadia loading due to the decrease in surface area and the formation of the crystalline V2O5 phase. The presence of water vapor in the reactant mixture resulted in a decrease of H2S conversion.