A Novel Pd Precursor Loaded γ‐Al₂O₃ with Excellent Adsorbent Performance for Ultra‐Deep Adsorptive Desulfurization of Benzene

Abstract

Fabricating highly water‐soluble and chlorine‐free precursors from Pd complexes remains challenging. Here, a novel Pd precursor (ammonium dinitrooxalato palladium(II) ((NH4)2[Pd(NO2)2(C2O4)]·2H2O)) is synthesized to address this challenge. Additionally, a Pd/Al2O3 adsorbent is prepared using γ‐Al2O3 as a base material to host Pd. The ligand action of the Pd complex forms single Pd atoms and Pd sub‐nano clusters on the surface of γ‐Al2O3. Pd/Al2O3‐4 as an adsorbent is evaluated using the benzene ultra‐deep desulfurization procedure, wherein thiophene is used as a probe molecule. The sulfur adsorption capacity of Pd/Al2O3‐4 is 1.76 mg g−1 for the ultra‐deep adsorptive desulfurization of benzene at a sulfur concentration of 50 ppm. The sulfur adsorption capacity of the new Pd/Al2O3‐4 adsorbent is 21.8% higher than that of a commercial Pd/Al2O3 adsorbent. In addition, the stability and durability of Pd/Al2O3‐4 are investigated at a sulfur concentration of 1 ppm. The Pd/Al2O3‐4 adsorbent achieves ≈100% thiophene removal after 434 h, which is 62 h more than the time required by the commercial Pd/Al2O3 adsorbent. The novel Pd precursor shows excellent potential for industrial applications, and the Pd/Al2O3‐4 adsorbent can be produced on a mass scale of 500 kg per batch.

Assessing the Efficacy of Graphene, Graphene Oxide, and Graphene Oxide Encrusted with Gold Nanoparticles for Sulfur Removal from Crude Oil: An Innovative Experimental Investigation

“…Abd-Zaid et al27 reached 18.8 wt % efficiency in the ADS process using Zn/Al 2 O material. Similarly, Xia et al28 achieved a desulfurization efficiency of 21.8% using synthesized Pd/Al 2 O 3 .…”

Metallofullerenes as Robust Single-Atom Catalysts for Adsorption and Dissociation of Hydrogen Molecules: A Density Functional Study

“…To accomplish this goal, two important aspects should be considered: finding an appropriate substrate or support to anchor the catalyst and to enhance the number of active sites on the electrocatalysts. − One of the most successful ways to improve the active site exposure and catalytic efficiency is the downsizing of the catalyst particles to a nano or even sub-nanocluster size. , Further decreasing the sub-nanoclusters to the atomic level well-defined catalysts, i.e., single-atom catalysts (SACs) can afford to enhance the exposed active sites and provide maximal atom utilization, the ultimate goal of nanocatalysis. − Some of the chemical characteristics of single atoms in SACs are notably different from the nanoparticle or sub-nanometer clusters, the SACs have extraordinary selectivity, catalytic activity, and durability. Recently, the concept of SACs has been receiving a huge interest in heterogeneous catalysis.…”

“… 14 − 16 One of the most successful ways to improve the active site exposure and catalytic efficiency is the downsizing of the catalyst particles to a nano or even sub-nanocluster size. 17 , 18 Further decreasing the sub-nanoclusters to the atomic level well-defined catalysts, i.e., single-atom catalysts (SACs) 19 can afford to enhance the exposed active sites and provide maximal atom utilization, the ultimate goal of nanocatalysis. 20 − 22 Some of the chemical characteristics of single atoms in SACs are notably different from the nanoparticle or sub-nanometer clusters, the SACs have extraordinary selectivity, catalytic activity, and durability.…”

Atomically Dispersed Aluminum Sites in Hexagonal Boron Nitride Nanofibers for Boosting Adsorptive Desulfurization Performance

“…Nowadays, adsorption desulfurization (ADS) − is one of the most promising technologies in the desulfurization field with the advantages of cost-effectiveness, mild reaction conditions, and green technique. Notably, hexagonal boron nitride nanofibers (BNNF), − as an emerging two-dimensional material, have captured extensive scientific attention for applications in the adsorption and separation field given by their excellent thermal stability, large specific surface area, and high adsorption capacity.…”