[O]-induced reactive adsorptive desulfurization of liquid fuel over AgXO@SBA-15 under ambient conditions. (31st August 2017)

• Record Type: Journal Article
• Authors: Ye, Feiyan; Miao, Guang; Wu, Liqiong; Wu, Ying; Li, Zhong; Song, Chunshan; Xiao, Jing
• Is Part Of: Chemical engineering science. Volume 168(2017)
• Page Start: 225
• Page End: 234
• Publication Date: 2017-08-31
• Subjects: Desulfurization -- Adsorption -- Fuel -- Silver -- Air; Chemical engineering -- Periodicals; Génie chimique -- Périodiques; Chemical engineering; Periodicals; Electronic journals; 660
• DOI: 10.1016/j.ces.2017.04.032
• Languages: English
• ISSNs: 0009-2509

Abstract

Graphical abstract: Highlights: A novel [O]-induced reactive adsorptive desulfurization approach was proposed. Over 90% of thiophenic compounds can be removed within 10 min (6 h −1 ) by RADS. Desulfurization capacity by RADS reached 4.4 times of that by conventional ADS. Desulfurization selectivity enhanced 2.4 orders of magnitude. RADS mechanism and preferential catalytic/adsorption sites were clarified. Abstract: The development of processes for clean energy production with low energy consumption is a central strategy for a sustainable and environmentally friendly planet. Here we report a novel [O]-induced reactive adsorptive desulfurization (RADS) approach for ultra-clean fuel production using multifunctional AgX O@SBA-15 adsorbent with and without the addition of air under ambient conditions. The adsorption capacity of AgX O@SBA-15 by RADS reached 4.4 times of that by conventional ADS from low-sulfur fuel (10 ppm-S), and its adsorption selectivity was enhanced 2.4 orders of magnitude. Over 90% of sulfur was removed within 10 min (corresponds to the space velocity of 6 h −1 ). The RADS mechanism was illustrated as a simultaneous oxidation of thiophenic compounds (to sulfones) and the selective adsorption of sulfones, where the nano-sized silver species detected at different valence states (AgO, Ag2 O and Ag) and the fed air played the versatile enabling roles as the oxidation catalyst and the oxidant, respectively, and the surface silanol groups were suggested as the preferential adsorption sites for the sulfones yielded. The work may open up new avenues for developing supported metal oxides for ultra-clean fuel production under ambient conditions, taking advantage of self-retained [O] and/or introduced earth-abundant air.