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1. An ionic liquid catalyzed probase method for one-pot synthesis of α,β-unsaturated esters from esters and aldehydes under mild conditions

Author:
Li, Chunshan,   et al.   ; Wang, Gang; Xu, Yiming; Zhang, Suojiang; Li, Zengxi;     Show all 5 Authors
Source:
Green chemistry 2017 v.19 no.20 pp. 4838-4848
ISSN:
1463-9270
Subject:
Lewis acids; aldehydes; aluminum chloride; anions; catalysts; catalytic activity; esters; fluorides; gas chromatography-mass spectrometry; green chemistry; ionic liquids; mole fraction; potassium tert-butoxide; sodium; synthesis; thermodynamics
Abstract:
... A one-pot synthesis of α,β-unsaturated esters from unactivated esters and aldehydes using strong bases, such as sodium alkoxide and potassium tert-butoxide, was reported. However, the ionic liquid (IL) catalyzed probase method for producing α,β-unsaturated esters was not reported until now. In this work, a series of ILs with fluoride anions were firstly prepared and used as catalysts in combinatio ...
DOI:
10.1039/c7gc02265d

2. Carbon Dioxide Methanation over Nickel-Based Catalysts Supported on Various Mesoporous Material

Author:
Li, Chunshan,   et al.   ; Guo, Xinpeng; Traitangwong, Atsadang; Hu, Mingxiang; Zuo, Cuncun; Meeyoo, Vissanu; Peng, Zhijian;     Show all 7 Authors
Source:
Energy & fuels 2018 v.32 no.3 pp. 3681-3689
ISSN:
1520-5029
Subject:
X-ray diffraction; aluminum oxide; carbon; carbon dioxide; catalysts; differential thermal analysis; formates; fuels; infrared spectroscopy; methane production; nickel; porous media; silica; synergism; thermogravimetry
Abstract:
... Diverse supports (ZSM-5, SBA-15, MCM-41, Al₂O₃ and SiO₂) with various mesoporous structures were introduced to fabricate nickel-based catalysts for the CO₂ methanation by incipient wetness impregnation method. Ni/ZSM-5 catalyst displayed the most active catalytic properties, followed with Ni/SBA-15, Ni/Al₂O₃, Ni/SiO₂ and Ni/MCM-41 catalysts. The excellent catalytic property of Ni/ZSM-5 catalyst wa ...
DOI:
10.1021/acs.energyfuels.7b03826

3. Carbon-Number-Based Kinetics, Reactor Modeling, and Process Simulation for Coal Tar Hydrogenation

Author:
Li, Chunshan,   et al.   ; Dai, Fei; Wang, Hongyan; Gong, Maoming; Li, Zengxi; Zhang, Suojiang;     Show all 6 Authors
Source:
Energy & Fuels 2015 v.29 no.11 pp. 7532-7541
ISSN:
1520-5029
Subject:
coal tar; energy balance; hydrogenation; kinetics; model validation; models
Abstract:
... A new carbon-number-based kinetic model containing 18 hydrocarbon groups was developed in this work to describe coal tar hydrogenation, and the kinetic parameters were determined by means of fitting the experimental data, obtained in a two-stage fixed-bed reactor hydrogenation experiment, under various operating conditions. Model validation revealed that experimental data considerably agreed with ...
DOI:
10.1021/acs.energyfuels.5b01476

4. Carbonyl ruthenium catalysts for the low-temperature water–gas shift reaction with ionic liquids as support structure controllers

Author:
Li, Chunshan,   et al.   ; ZhangThese authors contributed equally to this work., Yingchao; Zuo, Cuncun; Guo, Xinpeng; Zhang, Suojiang;     Show all 5 Authors
Source:
Green chemistry 2016 v.18 no.17 pp. 4704-4713
ISSN:
1463-9270
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; atmospheric pressure; carbon monoxide; catalysts; catalytic activity; chlorides; controllers; energy-dispersive X-ray analysis; green chemistry; hydrogen bonding; ionic liquids; nitrates; ruthenium; scanning electron microscopy; silica gel; sol-gel processing; temperature; thermogravimetry; transmission electron microscopy
Abstract:
... A series of SiO₂-confined Ru₃(CO)₁₂ catalysts for the water–gas shift (WGS) reaction was synthesized using a sol–gel method with five different 1-butyl-2,3-dimethylimidazolium ionic liquids (ILs) with BF₄⁻, NO₃⁻, Cl⁻, OTf⁻, and NTf₂⁻. FT-IR, XRD, BET, SEM/EDS, TEM, ICP, CO-TPD and TGA were used to determine the influence of the different IL structures and loadings (10–40%) on the structure of the ...
DOI:
10.1039/c6gc00354k

5. Catalyst Grading Optimization and Kinetic Simulation of the Shale Oil Hydrotreating Process

Author:
Li, Chunshan,   et al.   ; Wang, Hongyan; Dai, Fei; Yang, Yiqian; Li, Zengxi; Zhang, Suojiang;     Show all 6 Authors
Source:
Energy & Fuels 2017 v.31 no.4 pp. 4353-4360
ISSN:
1520-5029
Subject:
catalysts; hydrogenation; kinetics; models; oils; shale; temperature
Abstract:
... The shale oil hydrogenation experiments were conducted on a fixed-bed reactor with grading of a hydrogenating protective (HP) catalyst, hydrofining (HF) catalyst, and hydrocracking (HC) catalyst. The effects of the reaction temperature and liquid hourly space velocity (LHSV) on product distribution of shale oil hydrotreating were investigated. Three kinds of lumping kinetic models for hydrodearoma ...
DOI:
10.1021/acs.energyfuels.6b02720

6. Catalysts, Kinetics, and Reactive Distillation for Methyl Acetate Synthesis

Author:
Li, Chunshan,   et al.   ; Zuo, Cuncun; Pan, Langsheng; Cao, Shasha; Zhang, Suojiang;     Show all 5 Authors
Source:
Industrial & Engineering Chemistry Research 2014 v.53 no.26 pp. 10540-10548
ISSN:
1520-5045
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; acetates; acetic acid; atmospheric pressure; catalysts; cation exchange resins; distillation; engineering; esterification; methanol; microscopy; models; temperature
Abstract:
... Two novel acidic cation-exchange resins, namely, NKC-9 and D072, were first developed to catalyze the esterification of acetic acid with methanol. Kinetics of methyl acetate synthesis are determined by the experiments in a batch reactor at temperatures from 45 to 60 °C under atmospheric pressure, with molar ratio of reactants (θBₒ = nₘₑₜₕₐₙₒₗ:nₐcₑₜᵢc ₐcᵢd) from 0.8 to 1.3. The kinetic data are cor ...
DOI:
10.1021/ie500371c

7. Catalysts, Process Optimization, and Kinetics for the Production of Methyl Acrylate over Vanadium Phosphorus Oxide Catalysts

Author:
Li, Chunshan,   et al.   ; Guo, Xinpeng; Yang, Dan; Zuo, Cuncun; Peng, Zhijian; Zhang, Suojiang;     Show all 6 Authors
Source:
Industrial & engineering chemistry process design and development 2017 v.56 no.20 pp. 5860-5871
ISSN:
1520-5045
Subject:
acetates; carbon; catalysts; catalytic activity; condensation reactions; formaldehyde; phosphorus; process design; regression analysis; response surface methodology; temperature; vanadium
Abstract:
... Vanadium phosphorus oxide (VPO) catalysts were developed for the aldol condensation of methyl acetate (MeOAC) with formaldehyde (HCHO) to methyl acrylate (MA). The influence of P/V ratio on catalytic activity and selectivity was revealed and optimized with a fixed bed reactor. The controllable preparation of VPO catalyst was reached, and the influence of carrier gas on the resistance of carbon dep ...
DOI:
10.1021/acs.iecr.7b01212

8. Catalytic Activity and Molecular Behavior of Lanthanum Modified CoSₓ/γ-Al₂O₃ Catalysts for the Reduction of SO₂ to Sulfur in Smelter Off-Gas Using CO-H₂ Mixture as Reductant

Author:
Li, Chunshan,   et al.   ; Ge, Tingting; Zuo, Cuncun; Chen, Hongnan; Muhammad, Yaseen; Wei, Lubin;     Show all 6 Authors
Source:
Industrial & engineering chemistry process design and development 2019 v.58 no.9 pp. 3595-3605
ISSN:
1520-5045
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; carbon monoxide; catalysts; catalytic activity; coal; hydrogen; lanthanum; process design; reducing agents; scanning electron microscopy; sulfur; sulfur dioxide
Abstract:
... In this study, a series of three-component CoSₓ/γ-Al₂O₃ catalysts were developed for the reduction of high-content SO₂ to sulfur in smelter off-gas. The introduction of a small amount of lanthanum additive greatly improved the catalytic activity and stability of Co-Cu/γ-Al₂O₃ catalysts using coal gas as reductant. The catalysts were characterized by XRD, XPS, BET, and SEM techniques. H₂/CO-TPR was ...
DOI:
10.1021/acs.iecr.8b04323

9. Catalytic Methanation of CO and CO2 in Coke Oven Gas over Ni–Co/ZrO2–CeO2

Author:
Li, Chunshan,   et al.   ; Razzaq, Rauf; Zhu, Hongwei; Jiang, Li; Muhammad, Usman; Zhang, Suojiang;     Show all 6 Authors
Source:
Industrial & Engineering Chemistry Research 2013 v.52 no.6 pp. 2247-2256
ISSN:
1520-5045
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; aluminum oxide; carbon dioxide; carbon monoxide; catalysts; catalytic activity; ceric oxide; coprecipitation; desorption; engineering; metals; methane; methane production; ovens; scanning electron microscopy; silica; temperature; zirconium oxide
Abstract:
... The methanation of CO and CO₂ present in coke oven gas was performed in a fixed-bed catalytic reactor at a reaction temperature between 200 and 400 °C. Different support materials, including SiO₂, Al₂O₃, ZrO₂, and CeO₂, were doped with a different percentage of active metals using a standard impregnation and coprecipitation method. The catalysts were characterized using Brunauer–Emmett–Teller anal ...
DOI:
10.1021/ie301399z

10. Cobalt catalyzed synthesis of α, β-unsaturated esters from esters and alcohols via mild O2-interrupted hydrogen borrowing

Author:
Li, Chunshan,   et al.   ; Wang, Gang; Li, Zengxi; Zhang, Suojiang;     Show all 4 Authors
Source:
Journal of catalysis 2018 v.368 pp. 228-236
ISSN:
0021-9517
Subject:
acetates; alcohols; catalysts; cobalt; dehydrogenation; deprotonation; hydrogen; ligands; moieties; oxygen; propionates
Abstract:
... The implementation of direct and mild catalytic synthesis of products from benign materials using inexpensive catalysts is a major goal of chemists. Herein, a mild O2-interrupted hydrogen borrowing strategy using easily accessible and high efficient cobalt complex was reported for direct synthesis of α, β-unsaturated esters from unactivated esters and alcohols. This new route had good tolerance on ...
DOI:
10.1016/j.jcat.2018.10.005

11. Co-methanation of Carbon Oxides over Nickel-Based CexZr1–xO2 Catalysts

Author:
Li, Chunshan,   et al.   ; Razzaq, Rauf; Amin, Nadeem; Zhang, Suojiang; Suzuki, Kenzi;     Show all 5 Authors
Source:
Energy & Fuels 2013 v.27 no.11 pp. 6955-6961
ISSN:
1520-5029
Subject:
X-radiation; X-ray diffraction; X-ray photoelectron spectroscopy; ammonia; carbon; carbon dioxide; carbon monoxide; catalysts; catalytic activity; crystallites; desorption; furnaces; hydrogen; methane; nickel; scanning electron microscopy
Abstract:
... A new NH₃-reduction method was developed for the preparation of Ni–Ce₀.₁₂Zr₀.₈₈O₂ catalysts with different Ni loadings (5, 10, and 15 wt %). The reduction of the catalysts was performed in a tube furnace with NH₃ or H₂. The catalysts were characterized using Brunauer–Emmett–Teller, inductively coupled plasma–optical emission spectroscopy, X-ray diffraction, transmission electron microscopy–high-re ...
DOI:
10.1021/ef401049v

12. Deep hydrodenitrification of pyridine by solid catalyst coupling with ionic liquids under mild conditions

Author:
Li, Chunshan,   et al.   ; Yao, Haoyu; Wang, Gang; Zuo, Cuncun; Wang, Erqiang; Zhang, Suojiang;     Show all 6 Authors
Source:
Green chemistry 2017 v.19 no.7 pp. 1692-1700
ISSN:
1463-9270
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; catalysts; catalytic activity; denitrification; differential thermal analysis; green chemistry; hydrogen; ionic liquids; molecular dynamics; pyridines; temperature; thermogravimetry; transmission electron microscopy
Abstract:
... A new route for deep hydrodenitrification (HDN) by solid catalyst coupling with ionic liquids (ILs) under mild conditions was proposed. Ni₂P/SBA-15 activated at different temperatures were characterized with XRD, XPS, TG/DTA, and TEM and studied for further improvement. The deep HDN catalyzed by Ni₂P/SBA-15 coupling with different ILs was evaluated. [Bmim]BF₄ was selected as the best one compared ...
DOI:
10.1039/c6gc03432b

13. Effect of Ion Cluster on Concentration of Long-Alkyl-Chain Ionic Liquids Aqueous Solution by Nanofiltration

Author:
Li, Chunshan,   et al.   ; Qian, Jianguo; Liu, Xiaomin; Yan, Ruiyi; Zhang, Xiangping; Zhang, Suojiang;     Show all 6 Authors
Source:
Industrial & engineering chemistry process design and development 2018 v.57 no.22 pp. 7633-7642
ISSN:
1520-5045
Subject:
aqueous solutions; chlorides; fouling; industrial applications; ionic liquids; molecular dynamics; nanofiltration; process design; recycling
Abstract:
... As a kind of green solvent and new material, recycling of ionic liquids (ILs) especially from aqueous solution is becoming a key barrier for industrial application. In this study, concentration process of long-alkyl-chain ILs solution with nanofiltration was proposed. The influence of ion cluster on filtration performance such as volume flux (Jᵥ), observed rejection (Rₒbₛ) was systematically studi ...
DOI:
10.1021/acs.iecr.8b01403

14. Effect of Metal Ion in Bulk VPO in Aldol Condensation of Formaldehyde and Methyl Acetate to Methyl Acrylate

Author:
Li, Chunshan,   et al.   ; Yang, Dan; Sararuk, Chidchon; Wang, Hui; Zhang, Suojiang; Li, Zengxi;     Show all 6 Authors
Source:
Industrial & engineering chemistry process design and development 2018 v.57 no.1 pp. 93-100
ISSN:
1520-5045
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; acetates; catalysts; condensation reactions; formaldehyde; process design; zirconium
Abstract:
... The metal ion effect on the bulk VPO was investigated using the aldol condensation of methyl acetate and formaldehyde to methyl acrylate. The VPO catalyst with 2 mol % Zr exhibited the highest methyl acrylate formation rate of 18.6 μmol·g–¹·min–¹. A combination of X-ray diffraction, BET, TPD, XPS, and EPR, together with activity testing data, was utilized to analyze and explain the origin of the m ...
DOI:
10.1021/acs.iecr.7b03521

15. Effects of Support for Vanadium Phosphorus Oxide Catalysts on Vapor-Phase Aldol Condensation of Methyl Acetate with Formaldehyde

Author:
Li, Chunshan,   et al.   ; Zhao, Hui; Zuo, Cuncun; Yang, Dan; Zhang, Suojiang;     Show all 5 Authors
Source:
Industrial & Engineering Chemistry Research 2016 v.55 no.50 pp. 12693-12702
ISSN:
1520-5045
Subject:
X-ray diffraction; acetates; acidity; aluminum oxide; ammonia; catalysts; condensation reactions; desorption; engineering; formaldehyde; hydrogen; infrared spectroscopy; phosphoric acid; phosphorus; scanning electron microscopy; silica; temperature; titanium dioxide; transmission electron microscopy; vanadium; zirconium oxide
Abstract:
... Vapor-phase aldol condensation of methyl acetate with formaldehyde over vanadium phosphorus oxide (VPO) deposited on SiO₂, TiO₂, ZrO₂, Nb₂O₅, Sb₂O₃, γ-Al₂O₃, and n-γ-Al₂O₃ (γ-Al₂O₃ treated with H₃PO₄) for methyl acrylate production was developed. The VPO/n-γ-Al₂O₃ was found to have the best performance based on the evaluated experiments in a fixed-bed reactor. The physicochemical properties of the ...

16. Esterification of Methacrylic Acid with Methanol: Process Optimization, Kinetic Modeling, and Reactive Distillation

Author:
Li, Chunshan,   et al.   ; Ran, Ran; Li, Jie; Wang, Gang; Li, Zengxi;     Show all 5 Authors
Source:
Industrial & engineering chemistry process design and development 2019 v.58 no.6 pp. 2135-2145
ISSN:
1520-5045
Subject:
activation energy; catalysts; cation exchange resins; distillation; enthalpy; entropy; esterification; kinetics; methanol; model validation; models; process design; standard deviation; temperature
Abstract:
... The esterification of methacrylic acid with methanol catalyzed by NKC-9 resin (a cation-exchange resin with sulfonate groups) was conducted in a stainless stirred batch reactor. The effects of catalyst loading, initial molar ratio of reactants, temperature, and pressure on this esterification reaction were investigated. A kinetic model based on the Langmuir–Hinshelwood mechanism was developed in w ...
DOI:
10.1021/acs.iecr.8b03842

17. Fabrication of Multilayered Molecularly Imprinted Membrane for Selective Recognition and Separation of Artemisinin

Author:
Li, Chunshan,   et al.   ; Zhang, Yongqiang; Tan, Xin; Liu, Xiao; Zeng, Shaojuan; Wang, Hui; Zhang, Suojiang;     Show all 7 Authors
Source:
ACS sustainable chemistry & engineering 2018 v.7 no.3 pp. 3127-3137
ISSN:
2168-0485
Subject:
X-ray photoelectron spectroscopy; adsorption; artemisinin; atomic force microscopy; chitosan; drugs; energy-dispersive X-ray analysis; molecular dynamics; permeability; polymerization; scanning electron microscopy; sustainable technology
Abstract:
... Molecularly imprinted membranes with multifunctional layers for artemisinin separation and purification were fabricated on porous chitosan membranes. The molecularly imprinted layer was fabricated through an in situ activator generated by electron transfer–atom transfer radical polymerization method by using artemisinin as the templet molecule. Properties of the prepared materials were characteriz ...
DOI:
10.1021/acssuschemeng.8b04908

18. Highly Active Ni-Based Catalyst Derived from Double Hydroxides Precursor for Low Temperature CO2 Methanation

Author:
Li, Chunshan,   et al.   ; Guo, Xinpeng; Peng, Zhijian; Hu, Mingxiang; Zuo, Cuncun; Traitangwong, Atsadang; Meeyoo, Vissanu; Zhang, Suojiang;     Show all 8 Authors
Source:
Industrial & engineering chemistry process design and development 2018 v.57 no.28 pp. 9102-9111
ISSN:
1520-5045
Subject:
Fourier transform infrared spectroscopy; aluminum oxide; carbon; carbon dioxide; catalysts; catalytic activity; hydrotalcite; methane production; nanoparticles; nickel; nickel oxide; process design; temperature
Abstract:
... The Ni nanoparticles supported on Al₂O₃ metal oxides with different Ni²⁺/Al³⁺ molar ratios from 1/1 to 6/1 (denoted as NiₓAL-MO) derived from Ni–Al hydrotalcite precursors (NiₓAl-LDHs) were prepared and applied to CO₂ methanation at a low temperature. By adjusting the Ni²⁺/Al³⁺ ratios, the alkaline and reducibility of the catalysts were designed, and the catalysts showed efficient catalytic perfor ...
DOI:
10.1021/acs.iecr.8b01619

19. Kinetic and Reactive Distillation for Acrylic Acid Synthesis via Transesterification

Author:
Li, Chunshan,   et al.   ; Zuo, Cuncun; Ge, Tingting; Cao, Shasha; Zhang, Suojiang;     Show all 5 Authors
Source:
Industrial & Engineering Chemistry Research 2016 v.55 no.30 pp. 8281-8291
ISSN:
1520-5045
Subject:
acrylic acid; adsorption; catalysts; catalytic activity; distillation; engineering; kinetics; transesterification
Abstract:
... Reaction distillation was first used for the process of acrylic acid synthesis through transesterification of methyl acrylate with acetic acid using a strongly acidic cationic exchange resin catalyst (NKC-9). Pseudo-homogeneous (P-H) and Langmuir–Hinshelwood (L-H) heterogeneous kinetic models were presented and fitted with the experimental data obtained from the batch reaction. The key factors of ...
DOI:
10.1021/acs.iecr.6b01128

20. Kinetic Evaluation of Hydrodesulfurization and Hydrodenitrogenation Reactions via a Lumped Model

Author:
Li, Chunshan,   et al.   ; Yang, Yiqian; Dai, Fei; Xiang, Shuguang; Yaseen, Muhammad; Zhang, Suojiang;     Show all 6 Authors
Source:
Energy & Fuels 2017 v.31 no.5 pp. 5491-5497
ISSN:
1520-5029
Subject:
hydrogen; kinetics; models; nitrogen; oils; sulfur; temperature
Abstract:
... Multi-lump kinetic models for model compounds representative of various sulfur (S) and nitrogen (N) compounds in coker gas oil (CGO) were developed to describe CGO hydrodesulfurization (HDS) and hydrodenitrogenation (HDN) processes, respectively. Model parameters were obtained from fitting of operating data. Validation results revealed that models could predict contents of S and N in products accu ...
DOI:
10.1021/acs.energyfuels.7b00496