Adsorptive Desulfurization: Fast On-Board Regeneration and the Influence of Fatty Acid Methyl Ester on Desulfurization and in Situ Regeneration Performance of a Silver-Based Adsorbent

Abstract

Adsorptive on-board desulfurization units require a high desulfurization and regeneration performance for a wide range of fuels to keep them small and ensure long maintenance intervals. A novel thermal regeneration strategy was investigated in this work, fulfilling all requirements for in situ on-board regeneration. In this strategy, a temperature-controlled flow rate (TCFR) of air was used to control the temperature inside the adsorber. With this dynamic approach, the regeneration time was reduced significantly in comparison to other thermal regeneration strategies. The novel regeneration strategy was tested using Ag–Al2O3 as an adsorbent to desulfurize a benzothiophen (BT)-enriched road diesel (300 ppmw of total sulfur). A commercial diesel containing fatty acid methyl ester (FAME) was used to evaluate the fuel flexibility regarding desulfurization and regeneration performance. In the case of 6.63 wt % FAME and 300 ppmw of sulfur, the breakthrough adsorption capacity of sulfur decreased from 1.04 to 0.17 mg/g. In TCFR regeneration experiments, the breakthrough adsorption capacity was restored to over 94% in the case of both fuels. Thereby, the Brunauer–Emmett–Teller (BET) surface area of the regenerated adsorbent decreased by only 1.5%, and negligible carbon deposits were detected.

Metal-Modified Cu-BTC Acid for Highly Enhanced Adsorption of Organosulfur Species

“…33 The most prominent metal ions for π-complexation are Cu(I) and Ag. 34,35 A number of research studies have been done on the modification of MOFs in order to attain the improved performances for sulfur removal. Due to its tunable chemical structure, Cu-BTC has received wide interest in the structural modification.…”

“…The d-block metals and their cations can interact with sulfur compound molecules via π-complexation and adsorb them in facedown orientation on a flat surface, which helps achieve an excellent adsorption capability . The most prominent metal ions for π-complexation are Cu­(I) and Ag. , …”

Enhanced Performance of Adsorptive Removal of Thiophene from Model Fuel over Micro–Mesoporous Binderless ZSM-5 Prepared by In Situ Crystallization

“…Among the various desulfurization methods, ADS is a highly efficient technology with milder operating conditions, 14,15 more energy conservation than HDS, and lower investment than ODS. 16 The process of ADS includes fixed bed, 17 simulated moving bed, and batch adsorption 18 systems. The essential issue of ADS is to develop high-performance adsorbents with high adsorption capacities, acceptable selectivity, and excellent regeneration performance.…”

“…Among the various desulfurization methods, ADS is a highly efficient technology with milder operating conditions, , more energy conservation than HDS, and lower investment than ODS . The process of ADS includes fixed bed, simulated moving bed, and batch adsorption systems.…”

Investigation of NH3 Influence on Adsorptive H2S Removal from Biogas for Solid Oxide Fuel Cell Application

“…Depending on its production source and the stage of the upgrading process, biogas can contain a number of sulfur compounds that have the capability to corrode processing equipment and gas pipelines, to inhibit the performance of vehicle catalysts, and to damage fuel cells . Various researchers investigated the influence of sulfur compounds on fuel cell efficiency and concluded that sulfur compounds are the dominant poison . Since the extent and nature of cell degradation are linked to used cell materials and microstructural characteristics, the phenomenon of cell degradation cannot be generalized.…”