Nickel Loaded on Porous Activated Carbons Derived from Waste Sugar Residue with Superior Catalytic Hydrogenolysis Performance

Abstract

Catalytic hydrogenolysis of the aromatic ether C− O bond is a meaningful step in the appreciation of lignin-related compounds. Carbon supports in heterogeneous reactions are widely used due to low cost and high porosity. The waste sugar residue (WSR) obtained by drying the waste liquid from a productive process of vitamins is the dominant precursor to make porous activated carbon (PAC) due to abundant solid content and low ash content. Herein, a series of PACs were prepared by the WSR and then loaded with Ni for the conversion of diphenyl ether. PAC-600-700-2.5 obtained by adjusting the preparation conditions owned the highest surface area (3220 m 2 /g), and the prepared Ni/ PAC-600-700-2.5 catalyst possessed stronger hydrogen adsorption capacity. The resulting Ni/PAC-600-700-2.5 achieved the 100% conversion of diphenyl ether under extremely mild conditions (160 °C and 0.5 h). The remarkable catalytic activity of Ni/PAC-600-700-2.5 was owed to the rational pore structure of PAC-600-700-2.5, which enabled better dispersion of Ni on the support and produced more Ni 0 .

Catalytic Hydrolysis/Hydrogenolysis of Lignin-Derived Aryl Ethers over Bimetallic Pd-Ni Systems: The Directional Regulation of Reaction Pathways

“…A reduction peak at 450 °C is the reduction of NiO of Ni/AC and Pd-Ni/AC . The reduction peak of Ni-based catalysts at about 500–600 °C corresponds to the reduction of amorphous C. , The weak Ni absorption peak in 3%Pd-1%Ni/AC is ascribed to a low nickel loading. The peak of hydrogen consumption between 600 and 700 °C in 3%Pd/AC was caused by the reaction of carbon with hydrogen at high-temperature conditions. , The temperature-programmed reduction (TPR) results showed that the reduced Pd 0 and Ni 0 could be obtained by the reduction of monometallic Pd-based and Ni-based catalysts at 300 and 450 °C, respectively.…”

“…A reduction peak at 450 °C is the reduction of NiO of Ni/AC and Pd-Ni/AC. 27 The reduction peak of Nibased catalysts at about 500−600 °C corresponds to the reduction of amorphous C. 28,29 The weak Ni absorption peak in 3%Pd-1%Ni/AC is ascribed to a low nickel loading. The peak of hydrogen consumption between 600 and 700 °C in 3% Pd/AC was caused by the reaction of carbon with hydrogen at high-temperature conditions.…”

Relatively Electron-Rich Ni Nanoparticles Supported on α-Al2O3 for High-Efficiency Hydrogenolysis of Lignin and Its Derivatives under Mild Conditions

“…The design of catalysts with high activity for cleaving C–O bonds is crucial for lignin conversion. A variety of metal-based catalysts such as Ni, − Co, , Ru, , Pd, , and Pt are widely applied in lignin hydrogenolysis. Among them, precious metal catalysts with a strong hydrogenation ability tend to cause excessive arenes hydrogenation during lignin depolymerization and reduce the selectivity of C–O bonds hydrogenolysis .…”

Increasing Ni Dispersion on a Carbon-Supported Catalyst for Hydrogenation Saturation of Naphthalene: Effect of Different Alkanol Solvents

“…Noble metal catalysts offer the benefits of high hydrogenation activity and high selectivity but are expensive, which has accelerated the utilization of cheaper substitutes with a higher efficiency. , Ni-based catalysts supported by oxide, zeolites, and active carbon are generally applied in the hydrogenation of NL due to their relatively low cost and relatively high hydrogenation efficiency. − As a relatively low-cost and easily available commercial material, YP80 is used as the carbon-supported catalyst due to its highly developed pore structure and relatively large specific surface areas ( S BET ). The structural properties of the YP80 contribute to anchoring the metal species on the surfaces and the channels of YP80, thus forming a relatively small nanoparticle size and improving the metal dispersion. , …”

“…The structural properties of the YP80 contribute to anchoring the metal species on the surfaces and the channels of YP80, thus forming a relatively small nanoparticle size and improving the metal dispersion. 12,13 Recently, one strategy for improving the metal dispersion over Ni-based catalysts is treating with a proper impregnation solvent during wet impregnation. 14 Alkanol solvents with a relatively low polarity can improve the interaction between the produced Ni species and the support, thus facilitating a strong metal−support interaction.…”