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One-pot three-component Mannich reaction catalyzed by sucrose char sulfonic acid

Qiong XU, Zhigao YANG, Dulin YIN, Jihui WANG

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 2,   Pages 201-205 doi: 10.1007/s11705-009-0052-5

Abstract: Sucrose char sulfonic acid efficiently catalyzed the one-pot three-component Mannich reaction of ketones

Keywords： One–pot synthesis     b-amino ketone     char sulfonic acid     2-acetylpyrazine     catalysis    

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Sulfonic acid-functionalized mesoporous silica catalyst with different morphology for biodiesel production

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 8,   Pages 1198-1210 doi: 10.1007/s11705-021-2133-z

Abstract: Sulfonic acid functionalized mesoporous silica based solid acid catalysts with different morphology wereThe sulfonic acid functionalized mesoporous silica catalysts of spherical shape and the cube shape werecatalytic biodiesel production reaction over the catalysts were studied by esterification of free fatty acid, oleic acid with methanol.The effect of various reaction parameters such as catalyst concentration, acid/alcohol molar ratio, catalyst

Keywords： solid acid catalyst     mesoporous silica     sulfonic acid     biodiesel     esterification     oleic acid    

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Mesoporous silicon sulfonic acid as a highly efficient and stable catalyst for the selective hydroamination

Jingbin Wen, Kuiyi You, Minjuan Chen, Jian Jian, Fangfang Zhao, Pingle Liu, Qiuhong Ai, He’an Luo

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 3,   Pages 654-665 doi: 10.1007/s11705-020-1973-2

Abstract: In this work, a new mesoporous silicon sulfonic acid catalyst derived from silicic acid has been successfullyThe physicochemical properties of mesoporous silicon sulfonic acid catalysts have been systematicallyThe results demonstrate that sulfonic acid groups have been grafted on silicic acid by forming a newThe mesoporous silicon sulfonic acid exhibits excellent catalytic performance and stability in the vaporThe developed mesoporous silicon sulfonic acid catalyst shows advantages of low cost, superior acid site

Keywords： mesoporous silicon sulfonic acid     catalytic hydroamination     cyclohexene     dicyclohexylamine     vapor phase    

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Intrinsic kinetics and external diffusion of catalytic steam gasification of fine coal char particles

Xuantao Wu, Jie Wang

Frontiers of Chemical Science and Engineering 2019, Volume 13, Issue 2,   Pages 415-426 doi: 10.1007/s11705-018-1725-8

Abstract: Catalytic steam gasification of fine coal char particles was carried out using a self-made laboratory

Keywords： coal char     catalytic steam gasification     pressure     kinetics     diffusion    

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Reaction kinetics and internal diffusion of Zhundong char gasification with CO

Yun Liu, Jiangyuan Qu, Xuehui Wu, Kai Zhang, Yuan Zhang

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 2,   Pages 373-383 doi: 10.1007/s11705-020-1949-2

Abstract: The effect of internal diffusion on char gasification with CO in the temperature range from 1123 K to1273 K was investigated via thermo-gravimetric analysis and assessment of char morphology features.

Keywords： coal char     CO2 gasification     internal diffusion     pore evolution    

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Effect of Fe on NO release during char combustion in air and O

Ying GU, Xiaowei LIU, Bo ZHAO, Minghou XU

Frontiers in Energy 2012, Volume 6, Issue 2,   Pages 200-206 doi: 10.1007/s11708-012-0181-2

Abstract: The chemistry of char was probed by studying nitrogen release under the reactions with air and oxy-fuelThe results show that the particle size of char generated at 1073 K in CO is larger than that in N .However, at 1573 K, it is smaller in CO atmosphere due to particle breaking by gasification of char

Keywords： NO     Fe     char     combustion     CO2    

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Effects of pyrolyzed semi-char blend ratio on coal combustion and pollution emission in a 0.35 MW pulverized

Yonghong YAN, Liutao SUN, Zhengkang PENG, Hongliang QI, Li LIU, Rui SUN

Frontiers in Energy 2021, Volume 15, Issue 1,   Pages 78-90 doi: 10.1007/s11708-020-0678-z

Abstract: ratio on combustion and pollution emission characteristics for co-combustion of Shenmu pyrolyzed semi-charThe NO concentration was 425 mg/m at 6% O and char burnout was 76.23% for the 45% blend ratio.that the change of standoff distance and NO emission were not obvious when the blend ratio of semi-charThe goal of this study is to achieve blending combustion with a large proportion of semi-char withoutSo, an SC blend ratio of no more than 45% can be suitable for the burning of semi-char.

Keywords： pulverized-coal combustion     pyrolyzed semi-char     ignition characteristics     pollution emission     char burnout    

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Effect of temperature on Lu’an bituminous char structure evolution in pyrolysis and combustion

Yandi ZHANG, Yinhe LIU, Xiaoli DUAN, Yao ZHOU, Xiaoqian LIU, Shijin XU

Frontiers in Energy 2021, Volume 15, Issue 1,   Pages 14-25 doi: 10.1007/s11708-020-0805-x

Abstract: particles, coal structure evolution will be affected by the ash behavior, which will further affect the charLu’an bituminous char and ash samples were prepared at the N and air atmospheres respectively acrossA scanning electron microscope (SEM) was used to observe the morphology of char and ash.SEM results indicated that the number density and physical dimension of ash spheres exuded from the charFurthermore, the constantly increasing pyrolysis temperature also caused the reactivity of char decrease

Keywords： bituminous char     pyrolysis     ash     structure evolution     reactivity    

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Effect of particle size on coal char----NO reaction

Xiumin JIANG, Xiangyong HUANG, Jiaxun LIU, Chaoqun ZHANG

Frontiers in Energy 2011, Volume 5, Issue 2,   Pages 221-228 doi: 10.1007/s11708-011-0146-x

Abstract: Surface nitrogen complex formation upon reaction of coal char with NO at 600°C was studied by X-ray photoelectronhad a noticeable effect on the magnitude of changes, which was observed on the surface of the coal charThe chemisorption processes of NO molecules on the char were simulated using the ab initio Hartree–Fock

Keywords： NO reduction     chemisorption     particle size     X-ray photoelectron spectroscopy     density functional theory (DFT)    

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Higher heating value prediction of torrefaction char produced from non-woody biomass

Nitipong SOPONPONGPIPAT,Dussadeeporn SITTIKUL,Unchana SAE-UENG

Frontiers in Energy 2015, Volume 9, Issue 4,   Pages 461-471 doi: 10.1007/s11708-015-0377-3

Abstract: The higher heating value of five types of non-woody biomass and their torrefaction char was predictedcarbon and volatile matter had a strong effect on the higher heating value prediction of torrefaction charThe high ash fraction found in torrefied char resulted in a decrease in prediction accuracy.

Keywords： higher heating value     correlation     biomass     proximate analysis     ultimate analysis    

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Amino acid promoted hydrogen battery system using Mn-pincer complex for reversible CO hydrogenation toformic acid

Frontiers in Energy 2022, Volume 16, Issue 5,   Pages 697-699 doi: 10.1007/s11708-022-0843-7

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Enzyme@bismuth-ellagic acid: a versatile platform for enzyme immobilization with enhanced acid-base stability

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 6,   Pages 784-794 doi: 10.1007/s11705-022-2278-4

Abstract: biocatalysts; however, it is limited by the conditions of metal–organic framework synthesis and its acid-baseHerein, a biocatalytic platform with improved acid-base stability was constructed via a one-pot methodusing bismuth-ellagic acid as the carrier.Bismuth-ellagic acid is a green phenol-based metal–organic framework whose organic precursor is extractedacid was enhanced, which remained stable over a wide pH range (2–12) and achieved multiple recycling

Keywords： bismuth-ellagic acid     in situ encapsulation     enzyme@MOF biocomposites    

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Discovery of novel ursolic acid derivatives as effective antimicrobial agents through a ROS-mediated

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 12,   Pages 2101-2113 doi: 10.1007/s11705-023-2361-5

Abstract: In this study, we prepared three series of ursolic acid derivatives and assessed their antibacterialredox system of phytopathogenic bacteria, further demonstrating the unprecedented potential of ursolic acid

Keywords： ursolic acid     antibacterial activities     reactive oxygen species     apoptosis    

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Synergistic scale inhibition of polyaspartic acid composite with magnetic field

LIU Zhenfa, WANG Yanji, GAO Yuhua, ZHANG Lihui

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 3,   Pages 261-265 doi: 10.1007/s11705-007-0047-z

Abstract: Polyaspartic acid (PASP) composite, a scale inhibitor, was prepared from PASP, itaconic acid–acrylicacid–acrylic ester (IA-AA-AE) terpolymer and 2-phosphonobutane- 1,2,4-tricarboxylic acid (PBTCA).

Keywords： synergism     magnetic     PBTCA     dynamic     acid–acrylic acid–acrylic    

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Abiotic association of phthalic acid esters with humic acid of a sludge landfill

Xiaoli CHAI, Yongxia HAO, Xin ZHAO, Guixiang LIU, Ying ZHU, Rong JI, Jun WU, Huanhuan TONG, Youcai ZHAO

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 6,   Pages 778-783 doi: 10.1007/s11783-012-0434-7

Abstract: The abiotic association between phthalic acid esters (PAEs) and humic substances (HS) in sludge landfillthe abiotic association of two abundant PAEs (diethyl phthalate and di- -butyl phthalate) with humic acid

Keywords： abiotic association     phthalic acid esters (PAEs)     humic acid     sludge     landfill    

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Title Author Date Type Operation

One-pot three-component Mannich reaction catalyzed by sucrose char sulfonic acid

Qiong XU, Zhigao YANG, Dulin YIN, Jihui WANG

Journal Article

Sulfonic acid-functionalized mesoporous silica catalyst with different morphology for biodiesel production

Journal Article

Mesoporous silicon sulfonic acid as a highly efficient and stable catalyst for the selective hydroamination

Jingbin Wen, Kuiyi You, Minjuan Chen, Jian Jian, Fangfang Zhao, Pingle Liu, Qiuhong Ai, He’an Luo

Journal Article

Intrinsic kinetics and external diffusion of catalytic steam gasification of fine coal char particles

Xuantao Wu, Jie Wang

Journal Article

Reaction kinetics and internal diffusion of Zhundong char gasification with CO

Yun Liu, Jiangyuan Qu, Xuehui Wu, Kai Zhang, Yuan Zhang

Journal Article

Effect of Fe on NO release during char combustion in air and O

Ying GU, Xiaowei LIU, Bo ZHAO, Minghou XU

Journal Article

Effects of pyrolyzed semi-char blend ratio on coal combustion and pollution emission in a 0.35 MW pulverized

Yonghong YAN, Liutao SUN, Zhengkang PENG, Hongliang QI, Li LIU, Rui SUN

Journal Article

Effect of temperature on Lu’an bituminous char structure evolution in pyrolysis and combustion

Yandi ZHANG, Yinhe LIU, Xiaoli DUAN, Yao ZHOU, Xiaoqian LIU, Shijin XU

Journal Article

Effect of particle size on coal char----NO reaction

Xiumin JIANG, Xiangyong HUANG, Jiaxun LIU, Chaoqun ZHANG

Journal Article

Higher heating value prediction of torrefaction char produced from non-woody biomass

Nitipong SOPONPONGPIPAT,Dussadeeporn SITTIKUL,Unchana SAE-UENG

Journal Article

Amino acid promoted hydrogen battery system using Mn-pincer complex for reversible CO hydrogenation toformic acid

Journal Article

Enzyme@bismuth-ellagic acid: a versatile platform for enzyme immobilization with enhanced acid-base stability

Journal Article

Discovery of novel ursolic acid derivatives as effective antimicrobial agents through a ROS-mediated

Journal Article

Synergistic scale inhibition of polyaspartic acid composite with magnetic field

LIU Zhenfa, WANG Yanji, GAO Yuhua, ZHANG Lihui

Journal Article

Abiotic association of phthalic acid esters with humic acid of a sludge landfill

Xiaoli CHAI, Yongxia HAO, Xin ZHAO, Guixiang LIU, Ying ZHU, Rong JI, Jun WU, Huanhuan TONG, Youcai ZHAO

Journal Article