Ordered mesoporous Cu-ZnO-Al 2 O 3 adsorbents for reactive adsorption desulfurization with enhanced sulfur saturation capacity

Abstract

To enhance sulfur adsorption and reactive activity, ordered mesoporous Cu-ZnO-Al2O3 adsorbents were prepared by a novel one-pot evaporation-induced self-assembly strategy using P123 as a structure-directing agent and ethanol as the solvent for reactive adsorption desulfurization. The metal oxide precursor molecules around P123 micellized, and self-assembly simultaneously occurred during evaporation from an ethanol solution at 60 °C, leading to the formation of the p6mm hexagonal symmetry mesoporous structure. Characterization results prove that the Cu-ZnO-Al2O3 adsorbents possess an ordered mesoporous structure with high thermal stability, large surface area (386-226 m 2 /g), large pore volume (0.60-0.46 cm 3 /g), and good dispersion of ZnO and Cu, which is beneficial for transforming S-compounds to ZnO. The sulfur saturation capacity of the ordered-mesoporous-structure Cu-ZnO-Al2O3 adsorbents is larger (49.4 mg/g) than that of the unordered mesoporous structure (13.5 mg/g).

Removal of Hydrogen Sulfide from Gas Streams Using Porous Materials: A Review

“…In another study, good desulfurization performances obtained by different Cu-ZnO-Al 2 O 3 adsorbents with ordered mesoporous structures highlighted the synergetic effect of multicomponent sorbents and highly porous structure . The as-synthesized materials with highly ordered mesopores, large surface areas ranging from 226 to 386 m 2 g –1 , and large pore volume (0.46–0.60 cm 3 g –1 ) provided a high sulfur saturation capacity up to 49.4 mg g –1 which was greater than that of the bulk Cu-ZnO-Al 2 O 3 sorbent (13.5 mg g –1 ).…”

Evaluación de la remoción de sulfuro de hidrógeno de biogás empleando arcilla ecuatoriana modificada con sodio, zinc y cobre y adaptada morfológicamente

“…La combinación de cobre y zinc sobre adsorbentes de Al2O3 ha sido utilizada para la desulfuración reactiva de corrientes gaseosas, luego de encontrarse que se incrementa la capacidad de remoción del H2S con la combinación de los óxidos de los metales [27]. Se comparó la capacidad de remoción en función del tiempo de uso de extrudados modificados con un 15 % de NaOH, un 15 % de cobre con la concentración de zinc del 5 %, 10 % y 15 % (figura 6).…”

Deep Adsorption Desulfurization of Fluid Catalytic Cracking Light Gasoline on NiO/ZnO-TiO2 Adsorbents with a High Breakthrough Sulfur Capacity

“… 16 − 18 Thus, new ultradeep desulfurization technologies are needed to produce clean gasoline. 19 , 20 An S-Zorb process developed by Conoco Phillips Co. is a widely used technology for producing ultralow-sulfur full-range gasoline. 21 This process combines the advantages of HDS and adsorption desulfurization, which can effectively remove sulfur compounds through reactive adsorption desulfurization (RADS) using Ni/ZnO-based adsorbents while maintaining the octane number.…”