Characteristics of sulfur removal by silver-titania adsorbents at ambient conditions

被引：0
作者：
Sachin Nair
Bruce J. Tatarchuk
机构：
[1] Auburn University,Department of Chemical Engineering
来源：
Adsorption | 2011年 / 17卷
关键词：
Adsorptive desulfurization; Fuel additives; Surface acidity; Competitive adsorption;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Sulfur capacity of SiO2, TiO2 and γ-Al2O3 structures was investigated. Thermal treatment of TiO2 and γ-Al2O3 in air increased their respective sulfur capacity by 67 and 43%. Sulfur capacity was associated with surface acidity and the improvement attributed to the formation of bronsted acid sites. Addition of 4wt% transition metals further enhanced the sulfur capacity of TiO2 with Ag indicating the highest increase. Comparison of sulfur capacity of Ag/TiO2 with other adsorbents was made using JP5 fuel with sulfur concentration of 1172 ppmw. Ag/TiO2 adsorbent demonstrated a saturation sulfur capacity of 8.20 mg/g. A significant loss in sulfur capacity was observed between real and model fuel compositions. Various factors resulting in this loss was investigated such as the effect of additives, competitive adsorption and the structure of sulfur heterocycles.
引用
收藏
页码：663 / 673
页数：10
相关论文
共 166 条
  • [1] Benard J.(1965)Reversible chemisorption of sulfur on silver Surf. Sci. 3 359-372
  • [2] Oudar J.(2006)Desulfurization of diesel using ion-exchanged zeolites Chem. Eng. Sci. 2006 2599-2608
  • [3] Carbone-Brouty F.(1966)Chemical identification of surface groups Adv. Catal. 16 179-274
  • [4] Bhandari M.V.(2009)On the methane adsorption capacity of activated carbons: in search of a correlation with adsorbent properties J. Chem. Technol. Biotechnol. 84 1736-1741
  • [5] Ko H.(1994)Acidity studies of titania-silica mixed oxides Catal. Lett. 25 209-223
  • [6] Chang P.G.(2009)Two pathways for water interaction with oxygen adatoms on TiO Phys. Rev. Lett. 102 8349-8359
  • [7] Jung H.S.(2007)(110) J. Phys. Chem. C 111 181-188
  • [8] Cho S.(1999)Role of surface functional groups in the adsorption kinetics of water vapor on microporous activated carbons Appl. Environ. Microbiol. 65 791-795
  • [9] Kim J.(2003)Microbial desulfurization of a crude oil middle-distillate fraction: analysis of the extent of sulfur removal and the effect of removal on remaining sulfur AIChE J. 50 9-801
  • [10] Boehm P.H.(2004)New sorbents for desulfurization of diesel fuels via Ind. Eng. Chem. Res. 43 791-993
12345678910