Copper-exchanged Y zeolites for gasoline deep-desulfurization

Abstract

Adsorptive desulfurization is one of the most efficient methods to remove recalcitrant sulfur compounds from transportation fuels. Two π-complexation-based sorbents were studied for desulfurization of synthetic gasoline. The sorbents were obtained by ion exchanging Y zeolites with copper cations using different techniques, which includes liquid phase ion exchange (CuY1) and vapor phase ion exchange (CuY2). Preliminary kinetic and equilibrium experiments for sulfur adsorption in batch system showed that CuY1 has the greatest desulfurization capacity and selectivity. The best adsorbent, CuY1 pellet, had a dynamic adsorption and equilibrium capacity of 2.97 and 4.14 mg S/g for fixed bed column assays, respectively. Experimental data obtained to batch reactor and packed bed column have been interpreted by means of a pore diffusion model in which the mass balance to the pellets are emphasized. The model proposed was able to fit well to the experimental data. After the first thermal regeneration, the copper ion-exchanged zeolite presented a maximum recovery of 91.5%. The copper-exchanged zeolite (in pellet form) has shown good uptake rate and regenerability for desulfurization of synthetic gasoline.

Modeling and Experiment for Oxygen Isotope Exchange over Copper-Containing Mordenite

“…Copper-containing zeolites are an extensively studied class of materials with various potential applications. These materials are industrially implemented as the “DeNOx” catalysts for the direct decomposition of nitrogen oxides − or their selective catalytic reduction (SCR) with ammonia − and hydrocarbons. , They may be used as the efficient adsorbents for the fuel desulphurization due to selective binding of thiophenic compounds. − Recently, the possibility to selectively oxidize methane to methanol via the chemical looping over copper-containing zeolites was demonstrated, − hence opening the broad opportunities for the effective utilization of natural gas at remote oil mines.…”

Oxygen Isotope Exchange over Copper-Containing Mordenite: The Effect of Copper Loading and Si/Al Ratio

“…Transition-metal-containing zeolites belong to an important class of materials widely used as adsorbents and catalysts for various chemical transformations. , Among them, copper-containing zeolites have been studied in depth due to their great adsorption capacity for fuel desulphurization, − high catalytic activity in the decomposition of nitrogen oxides, − and selective catalytic reduction − (SCR). The recent discovery of the selective methane oxidation to methanol over copper-containing zeolites based on the chemical looping approach − brought about new opportunities for utilizing these materials for the effective valorization of natural gas.…”

Efficient Method to Catch Adsorption Behavior: Understanding the Effect of Sodium Ions on Benzene/Thiophene Adsorption in Na‐FAU

“…Myriam et al. [ 13 ] used copper exchange Y zeolite (CuY) to remove thiophene from synthetic gasoline at room temperature. Kevin [ 14 ] prepared Ce and Cu ion‐exchange mesoporous Y zeolite for the adsorption and removal of sulfur compounds in liquid fuels, and found that it has a broad application prospect in the selective removal of sulfur compounds.…”