Preparation, characterization and catalytic performance of HPW/aEVM catalyst on oxidative desulfurization

Huang, Pengcheng; Luo, Guangqin; Kang, Lihua; Dai, Bin

doi:10.1039/c6ra26587a

Cited by 23 publications

(7 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The calculated rate coefficients k at different temperatures observed the Arrhenius equation quite well (Figure d), and the activation energy E a was calculated as 44.54 kJ/mol. Being similar with the reported common E a values, , the temperature could not be the key parameter to influence the ODS rate, let alone having a maximum limitation in case of the thermal decomposition of H 2 O 2 . To further enhance the reaction rate under the same consumption of the H 2 O 2 oxidant, the only way is to improve the collision frequency between DBT and H 2 O 2 molecules.…”

Section: Resultssupporting

confidence: 84%

Catalyst, Emulsion Stabilizer, and Adsorbent: Three Roles In One for Synergistically Enhancing Interfacial Catalytic Oxidative Desulfurization

Xia

Zhao

et al. 2019

Langmuir

View full text Add to dashboard Cite

A Pickering emulsion catalytic system was proposed to reduce the transfer limitation between two immiscible reactant phases for enhancing the kinetics of heterogenetic oxidative desulfurization (ODS). By loading phosphotungstic acid (HPW) nanoparticles on a novel pyridine-based porous organic polymer of P[tVPB-VP x ], the amphiphilic catalysts were produced and used as the stabilizer for Pickering emulsions. Specifically, an ultrafast ODS rate was realized in the HPW/P[tVPB-VP 1 ]-stabilized Pickering emulsion catalytic system, and just within 15 min, 100 ppm dibenzothiophene (DBT) was completely oxidized by H 2 O 2 . Because the obtained hierarchical porous HPW/P[tVPB-VP x ] catalysts showed both high adsorption capacity of DBT and excellent catalytic ODS performance, the catalysts assembling at the interface of emulsions provided this fastest reaction dynamics. Playing three roles of catalyst, emulsion stabilizer, and adsorbent, the synergistic functional catalytic emulsions can be a promising approach to significantly boost the heterogeneous catalytic ODS performance.

show abstract

Section: Resultssupporting

confidence: 84%

Catalyst, Emulsion Stabilizer, and Adsorbent: Three Roles In One for Synergistically Enhancing Interfacial Catalytic Oxidative Desulfurization

Xia

Zhao

et al. 2019

Langmuir

View full text Add to dashboard Cite

show abstract

“…Figure b and 7d show the obtained activation energies of MF‐NiO/2D‐VT and MW‐NiO/2D‐VT catalysts at different rates. In accordance with the Arrhenius equation, we calculated that the activation energies of MF‐NiO/2D‐VT and MW‐NiO/2D‐VT catalyzed acetylene carbonylation were 44.6198 KJ/mol and 10.3785 KJ/mol, respectively; clearly, the reaction activation energy of the MW‐NiO/2D‐VT catalyst is smaller than that of MF‐NiO/2D‐VT, which theoretically demonstrates that the dispersed and small particle size nano‐nickel oxide catalyst has better catalytic performance …”

Section: Resultsmentioning

confidence: 99%

Microwave‐Assisted Rapid Preparation of Vermiculite‐Loaded Nano‐Nickel Oxide As a Highly Efficient Catalyst for Acetylene Carbonylation to Synthesize Acrylic Acid

Guo

Shang

et al. 2020

ChemistrySelect

View full text Add to dashboard Cite

With CuBr2 as a co‐catalyst, the nickel‐supported two‐dimensional layered vermiculite (2D‐VT)‐based composite [Ni(NO3)2•6H2O/2D‐VT] was used as a precursor and applied to various calcination methods to produce catalysts. These catalysts were used in the acetylene carbonylation reaction to synthesize acrylic acid (AA). The catalysts were characterized and evaluated by scanning electron microscope (SEM), transmission electron microscope (TEM), X‐ray diffraction (XRD), X‐ray photoelectron spectroscopy (XPS), inductively coupled plasma (ICP), hydrogen temperature‐programmed reduction (H2‐TPR), nitrogen adsorption desorption analyzer (BET) and thermogravimetric analysis (TG). We found that the microwave (MW) radiation calcined catalyst (MW‐NiO/2D‐VT) exhibited better catalytic performance than the muffle furnace (MF) calcination catalyst (MF‐NiO/2D‐VT). This difference is observed owing to the fast speed of microwave radiation heating, short baking time, and the instantaneous formation of nano‐NiO particles that have better dispersibility and uniformity, which is more conducive to the performance expression of nickel oxide. Under the optimal reaction conditions, the yield of AA is 86.3%. During the reaction, the MW‐NiO/2D‐VT catalyst is more stable and produces less by‐deposits than the MF‐NiO/2D‐VT catalyst. Thus, MW‐NiO/2D‐VT is more conducive to improving the selectivity of AA. In addition, theoretical calculations show that the MW‐NiO/2D‐VT catalyst has a lower apparent activation energy, which kinetically explains why MW‐NiO/2D‐VT is an excellent catalyst.

show abstract

“…Therefore, it is very important to reduce the load of HPW. The large content of HPW required for the reaction is mainly due to the fact that HPW is prone to agglomeration [ 14 ]. Therefore, to reduce the loading of HPW, it is necessary to prevent agglomeration and increase its dispersion on the surface of the support, thereby providing sufficient active sites.…”

Section: Introductionmentioning

confidence: 99%

Oxidative Desulfurization Catalyzed by Phosphotungstic Acid Supported on Hierarchical Porous Carbons

Wang

Kang

2021

Nanomaterials

Self Cite

View full text Add to dashboard Cite

A hierarchical porous carbon material (HPC) with an ultra-high specific surface area was synthesized with sisal fiber (SF) as a precursor, and then H3PW12O40•24H2O (HPW) was immobilized on the support of SF−HPC by a simple impregnation method. A series characterization technology approved that the obtained SF−HPC had a high surface area of 3152.46 m2g−1 with micropores and macropores. HPW was well-dispersed on the surface of the SF−HPC support, which reduced the loading of HPW to as low as 5%. HPW/SF-HPW showed excellent catalytic performance for oxidative desulfurization, and the desulfurization rate reached almost 100% under the optimal reaction conditions. The desulfurization rate of HPW/SF-HPW could be maintained at above 94% after four recycles.

show abstract

Preparation, characterization and catalytic performance of HPW/aEVM catalyst on oxidative desulfurization

Abstract: Expanded vermiculite (EVM) was prepared, treated with acid (aEVM) and incorporated with H3PW12O40 (HPW) by an ordinary impregnation method.

Cited by 23 publications

References 24 publications

Catalyst, Emulsion Stabilizer, and Adsorbent: Three Roles In One for Synergistically Enhancing Interfacial Catalytic Oxidative Desulfurization

Catalyst, Emulsion Stabilizer, and Adsorbent: Three Roles In One for Synergistically Enhancing Interfacial Catalytic Oxidative Desulfurization

Microwave‐Assisted Rapid Preparation of Vermiculite‐Loaded Nano‐Nickel Oxide As a Highly Efficient Catalyst for Acetylene Carbonylation to Synthesize Acrylic Acid

Oxidative Desulfurization Catalyzed by Phosphotungstic Acid Supported on Hierarchical Porous Carbons

Contact Info

Product

Resources

About