02146nas a2200229   4500008004100000245011600041210006900157260000800226300001200234490000800246520137700254653000901631653001401640653001401654653002201668653002001690100002201710700002101732700002201753700001901775856012201794       2017                        eng d00aDeveloping techno-economically sustainable methodologies for deep desulfurization using hydrodynamic cavitation0 aDeveloping technoeconomically sustainable methodologies for deep  cDEC  a482-4900 v2103 aThe present work, for the first time, describes the efficacy of the cavitation process and compares the cavitation yield for two types of cavitation devices-one employing linear flow for the generation of cavities and other employing vortex flow. The process involves pre-programmed mixing of the organic and aqueous phases, and can be carried out using simple mechanical cavitating devices such as orifice or vortex diode. The process essentially exploits in situ generation of oxidising agents such as hydroxyl radicals for oxidative removal of sulfur. The efficiency of the process is strongly dependent on the nature of device apart from the nature of the organic phase. The effects of process parameters and engineering designs were established for three organic solvents (n-octane, toluene, n-octanol) for model sulfur compound-Thiophene. A very high removal to the extent of 95% was demonstrated. The results were also verified using commercial diesel. The cavitation yield is significantly higher for vortex diode compared to the orifice. The process has potential to provide a green approach for desulfurization of fuels or organics without the use of catalyst or external chemicals/reagents apart from newer engineering configurations for effective implementation of hydrodynamic cavitation in industrial practice and also appears to be economically sustainable.10aFuel10aOxidation10aPetroleum10aPollution Control10aSulphur Removal1 aSuryawanshi, N.B.1 aBhandari, V., M.1 aSorokhaibam, L.G.1 aRanade, V., V.  uhttp://library.ncl.res.in/content/developing-techno-economically-sustainable-methodologies-deep-desulfurization-using02241nas a2200181   4500008004100000022001400041245014200055210006900197260000800266300001400274490000700288520155800295100002201853700001901875700002201894700001701916856012601933       2018                        eng d  a0888-588500aInvestigating adsorptive deep desulfurization of fuels using metal-modified adsorbents and process intensification by acoustic cavitation0 aInvestigating adsorptive deep desulfurization of fuels using met  cMAY  a7593-76060 v583 a<p>The harmful impact on the environment due to SOx emissions from fuels and increasingly strict norms over the years have amplified deep-desulfurization challenges, consequently enhancing attractiveness of adsorptive separations. The present work focuses on investigating metal modifications and process intensification using acoustic cavitation for improving sulfur removal behavior and selectivity. The proof of concept was elucidated using two model adsorbents: one commercial Shirasagi TAC adsorbent and another newer adsorbent derived from Cassia fistula biomass. Single- and double-metal modifications were studied using zinc, cobalt, nickel, and copper. An attempt was made to further improve the sulfur removal using process intensification using acoustic cavitation coupled with adsorption. The removal of three refractory sulfur compounds (viz. thiophene, benzothiophene, and dibenzothiophene) was studied, and the performance was compared for both single- and double-metal modifications apart from process intensification. In the case of TAC, a high capacity for sulfur removal, up to 23 mg S/g, was obtained, especially for dibenzothiophene. Process intensification using cavitation coupled with adsorption further improved sulfur removal to the extent of 100%, and for metal-modified TAC, a capacity increase up to 38 mg S/g for dibenzothiophene was obtained. The results indicate that the combined effect of metal modification and process intensification can substantially improve the sulfur-removal efficiency of carbon adsorbents.</p>
1 aSuryawanshi, N.B.1 aBhandari, V.M.1 aSorokhaibam, L.G.1 aRanade, V.V.  uhttp://library.ncl.res.in/content/investigating-adsorptive-deep-desulfurization-fuels-using-metal-modified-adsorbents-and