Division of Chemical Engineering, Pusan National University, Busan, 609-735, Republic of Korea.
Dalton Trans. 2011 Apr 21;40(15):3938-45. doi: 10.1039/c0dt01144d. Epub 2010 Dec 14.
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 H(2)S 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 SO(2) emissions. The H(2)S 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 V(2)O(5) phase. The presence of water vapor in the reactant mixture resulted in a decrease of H(2)S conversion.
一系列不同氧化钒负载量的铁氧化物-柱撑黏土(V/Fe-PILCs)被制备出来，并研究了它们在选择性催化氧化 H(2)S 中的性能。V/Fe-PILCs 通过 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(FTIR)光谱、X 射线光电子能谱(XPS)和氢气程序升温还原(H(2)-TPR)进行了表征。V/Fe-PILCs 表现出比没有任何明显 SO(2)排放的 Fe-PILC 更好的催化性能。随着氧化钒含量的增加，V/Fe-PILCs 上的 H(2)S 转化率增加，达到 7wt%。然而，在更高的氧化钒负载量下，由于比表面积的减少和结晶 V(2)O(5)相的形成，转化率下降。反应物混合物中水蒸气的存在导致 H(2)S 转化率降低。
