Desulphurization Performance and Mechanism Study by in Situ DRIFTS of Activated Coke Modified by Oxidization

详细信息    查看全文

• 作者：Jinxiu Wang ; Xiaoran Meng ; Jinsheng Chen ; Yanke Yu ; Jifa Miao ; Weijia Yu ; Zongli Xie
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2016
• 出版时间：April 6, 2016
• 年：2016
• 卷：55
• 期：13
• 页码：3790-3796
• 全文大小：441K
• ISSN：1520-5045

文摘

Commercial coke was modified by H₂SO₄ and (NH₄)₂S₂O₈ to enhance the adsorption and its catalytic activity, respectively . The properties of coke samples were characterized by Brunauer–Emmett–Teller analysis, Fourier transform infrared spectroscopy, scanning electron microscopy–energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) analysis. The activity performance was examined in a fixed bed reactor, and the effects of temperature, O₂, H₂O, and CO₂ were investigated. The desulfurization performance of modified activated coke was considerably enhanced by treatment with (NH₄)₂S₂O₈. This is due to the existence of oxygen and nitrogen functional groups and the enhanced porous structure of modified activated coke. The DRIFTS behavior of SO₂ suggested that the presence of O₂ greatly promotes SO₂ adsorption and that the modification by (NH₄)₂S₂O₈ significantly improves SO₂ oxidation and retention on activated coke.