Dekun Ji

Beijing Institute of Petrochemical Technology

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Hongtao Liu

Beijing University of Chemical Technology

Xionghou Gao

Lanzhou Petrochemical Polytechnic

Shijing Lin

Beijing Institute of Petrochemical Technology

Long Huang

Yunnan Normal University

Honghai Liu

Nanjing Forestry University

Chunyan Xu

Xinyu University

Rongyue Zhang

Beijing Institute of Petrochemical Technology

Long Huang

Northeast Normal University

Yexuan Liu

Chinese Academy of Sciences

Qiang Li

Sichuan University

Cooperative Institutions

Beijing Institute of Petrochemical Technology

Chinese Academy of Sciences

University of Chinese Academy of Sciences

Beijing University of Chemical Technology

Sichuan University

Jilin University

Research Center for Eco-Environmental Sciences

Institute of Process Engineering

Beijing National Laboratory for Molecular Sciences

Lanzhou Petrochemical Polytechnic

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Layered Double Hydroxide Method for Preparing Ni–Mo/γ-Al₂O₃ Ultradeep Hydrodesulfurization Catalysts

Industrial & Engineering Chemistry Research (2018)

Linyi Lv Yawen Bo Dekun Ji Wei Han Honghai Liu

This article reports a novel strategy for preparing NiMo/γ-Al2O3 ultradeep hydrodesulfurization (HDS) catalysts via thermal decomposition of layered double hydroxides (LDHs). Ni–Al–[C6H4(COO)2]2–-LDHs/γ-Al2O3 (terephthalate-pillared Ni–Al-LDHs/γ-Al2O3) composites were first obtained by in situ crystallization of Ni–Al–[C6H4(COO)2]2–-LDHs on the surface of γ-Al2O3. Then Ni–Al–Mo7O246–-LDHs/γ-Al2O3 composites were synthesized from the above composites by the anion exchange of [C6H4(COO)2]2– with Mo7O246–. Finally, bimetallic Ni–Mo/γ-Al2O3 catalysts were obtained by the subsequent decomposition of Ni–Al–Mo7O246–-LDHs/γ-Al2O3. The LDHs strategy imposes significant effects on improving the Ni/Mo dispersion with weak interaction of active metal and support and thereby greatly improves the HDS properties of the resulting catalysts. The HDS assessment results revealed that the catalyst obtained by LDHs procedure exhibits outstanding HDS activities for 4,6-dimethyldibenzothiophene and Dagang FCC diesel. The novel strategy employed in this article sheds light on the industrial preparation and application of NiMo/γ-Al2O3 catalysts.

Layered double hydroxides

Bimetallic strip

10.1021/acs.iecr.8b03383

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Citations (6)

Zeolite Beta Precursors as Building Units toward Enhancing the Microporosity Fraction of Mesoporous Aluminosilicates

Industrial & Engineering Chemistry Research (2018)

Dekun Ji Baojie Wang Ting Yue Xiaoping Li Xiaotong Mi

Our group has reported the synthesis of hydrothermally stable mesoporous aluminosilicates (MAs) by self-assembly of triblock copolymers and zeolite Y precursors. However, degradation of zeolite Y precursors in the acidic synthesis system will inevitably lead to low microporosity fraction of final products. Development of a facile route to obtain MAs simultaneously with high hydrothermal stability and microporosity fraction is still a great challenge. Herein, we employ zeolite Beta precursors as building units to solve this problem. In this strategy, zeolite Beta precursors were more stable than zeolite Y precursors in the acidic synthesis system due to the presence of organic directing agent TEAOH, which would result in more microporosity implanted into the framework of MAs. By fine-tuning the assembly time, the microporosity fraction could be adjusted in a range of 38.7%–52.9%. In addition, the synthesized MAs maintain well-resolved crystal patterns, high surface area, and pore volume even after a severe hydrothermal treatment.

Hydrothermal Synthesis

Fraction (chemistry)

10.1021/acs.iecr.8b01821

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Citations (2)

Synthesis of flower-like Co3O4–CeO2 composite oxide and its application to catalytic degradation of 1,2,4-trichlorobenzene

Applied Catalysis B Environment and Energy (2012)

Shijing Lin Guijin Su Minghui Zheng Dekun Ji Manke Jia

Degradation

10.1016/j.apcatb.2012.05.011

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Citations (77)

Preparation of a novel polymer monolith with high loading capacity by grafting block poly(PEGA–mPEGA) for high-efficiency solid phase synthesis

Reactive and Functional Polymers (2015)

Rongyue Zhang Qiang Li Dekun Ji Yiting Pan Bo Xu

Monolith

Atom-transfer radical-polymerization

10.1016/j.reactfunctpolym.2015.08.002

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Citations (4)

Lanthanum-doped nickel-based composite metal oxide catalyst for hydrogenation of isophthalonitrile to produce meta-xylenediamine

Catalysis Science & Technology (2024)

Heng Shao Jing Guo Rulong Li Dekun Ji Long Huang

Lanthanum-doped nickel-based composite metal oxide catalysts exhibited excellent activity in IPN hydrogenation reactions with remarkable stability in fixed-bed reactors.

Lanthanum

Lanthanum oxide

Nickel oxide

10.1039/d4cy00802b

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Infinite Dilution Activity Coefficients and Gas–Liquid Partition Coefficients of Organic Compounds in Ionic Liquid 1-Butyl-2,3-dimethylimidazolium Thiocyanate: Measurements and LFER Calculations

Journal of Chemical & Engineering Data (2023)

Zhixiang Wang Wei-Han Ge Wenhao Li Zi-Zhong Hao Liu Zhang

Infinite dilution activity coefficients (γi∞) of 31 organic solutes (alkanes, cycloalkanes, olefins, aromatics, chlorinated alkanes, alcohols, and other polar organic solutes) in the ionic liquid (IL) 1-butyl-2,3-dimethylimidazole thiocyanate ([BMMIM][SCN]) were determined by gas–liquid chromatographic (GLC) method in the temperature range of 313.15–353.15 K. The infinite dilution partial molar excess enthalpies (H̅iE, ∞), entropies (TrefS̅iE, ∞), and Gibbs free energies (G̅iE, ∞) of the organic solutes at the reference temperature T = 298.15 K and the solubility parameters (δ3) of [BMMIM][SCN] were derived from γi∞. The gas–liquid partition coefficients (KL) of solutes at different temperatures were calculated by referring to the densities of [BMMIM][SCN]. The linear free energy relationship solvation model was used to fit the KL values, and the KL prediction model was obtained. The selectivity (Sij∞) and capacity (kj∞) of n-hexane (i)/benzene (j) and cyclohexane (i)/benzene (j) at infinite dilution at 323.15 K were calculated. The results were compared with the values of ILs with the thiocyanate anion in the literature.

Thiocyanate

Free-energy relationship

Dilution

Cycloalkane

Taft equation

10.1021/acs.jced.3c00153

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Citations (2)

Mesostructured Y zeolite from NaY with low Si/Al by one-step method based on bifunctional surfactant

Materials Chemistry and Physics (2017)

Dekun Ji Honghai Liu Xiao Wang Hongtao Liu Xionghou Gao

10.1016/j.matchemphys.2017.04.059

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Citations (22)

Synthesis of Tetrahydropyran from Tetrahydrofurfuryl Alcohol over Cu–Zno/Al2O3 under a Gaseous-Phase Condition

Catalysts (2018)

Fengyuan Zhang Bin Zhang Xincheng Wang Long Huang Dekun Ji

Tetrahydropyran (THP) represents an O-containing hetero-cyclic compound that can be used as a promising solvent or monomer for polymer synthesis. In this work, Cu–ZnO/Al2O3 catalysts have been prepared by a facile precipitation–extrusion method and used for the synthesis of THP through gaseous-phase hydrogenolysis of tetrahydrofurfuryl alcohol (THFA). The effect of the molar ratio of Cu/Zn/Al, reaction temperature, and hydrogen pressure was investigated. An 89.4% selectivity of THP was achieved at 270 °C and 1.0 MPa H2. Meanwhile, the optimum molar ratio of Cu/Zn/Al was determined to be 4:1:10. The Cu–ZnO/Al2O3 catalyst exhibited high catalytic activity and stability for 205 h on-stream. A possible reaction mechanism involving several consecutive reactions was proposed: THFA was firstly rearranged to 2-hydroxytetrahydropyran (2-HTHP), followed by the dehydration of 2-HTHP to 3,4-2H-dihydropyran (DHP) over acid sites; finally, the DHP was hydrogenated to THP. The synergy of acid sites and metal sites of Cu–ZnO/Al2O3 played an important role during the production of THP.

Hydrogenolysis

Tetrahydropyran

10.3390/catal8030105

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Citations (4)