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One-step synthesis of

Kuiyi YOU, Fangfang ZHAO, Xueyan LONG, Pingle LIU, Qiuhong AI, Hean LUO

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 4,   Pages 389-394 doi: 10.1007/s11705-012-1218-0

Abstract: approach for the synthesis of -caprolactam via the liquid phase nitrosation of cyclohexane and nitrosyl sulfuricacid in the presence of concentrated sulfuric acid has been developed.the composites were then employed to catalyze the nitrosation reaction of cyclohexane and nitrosyl sulfuricacid.Compared to the reaction using fuming sulfuric acid, the selectivity for the desired product was significantly

Keywords： -caprolactam     AlVPO composite catalysts     one-step synthesis     concentrated sulfuric acid    

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Octane compositions in sulfuric acid catalyzed isobutane/butene alkylation products: experimental and

Lina Liang, Youzhi Liu, Weizhou Jiao, Qiaoling Zhang, Chao Zhang

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 5,   Pages 1229-1242 doi: 10.1007/s11705-020-2030-x

Abstract: Based on a classic carbenium ion mechanism, the carbocation transition states in concentrated sulfuricacid catalyzed alkylation were investigated using quantum-chemical simulations and predicted the concentration

Keywords： sulfuric acid catalyzed alkylation     carbocation reaction     transition state     octane compositions    

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Comparison of prechilling stratification and sulfuric acid scarification on seed germination of

Nan WANG, Jing GAO, Suiqi ZHANG, Feng YAN

Frontiers of Agricultural Science and Engineering 2017, Volume 4, Issue 2,   Pages 220-227 doi: 10.15302/J-FASE-2017146

Abstract: To determine if prechilling stratification (PCS) and sulfuric acid scarification (SAS) can optimize establishment

Keywords： base water potential     data analysis method     embryo growth     germination    

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Resistance to acid degradation, sorptivity, and setting time of geopolymer mortars

Osama A MOHAMED; Rania AL-KHATTAB; Waddah AL-HAWAT

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 6,   Pages 781-791 doi: 10.1007/s11709-022-0862-9

Abstract: After 7, 28, and 90 d of immersion in a 10% sulfuric acid solution, the resistance of a geopolymer matrixNo reduction in weight of sample occurred after immersion in the strong acid H2SO4sulfuricacid.

Keywords： durability of concrete     sodium hydroxide     sodium silicates     reduction in CO2 emissions     sulfuricacid    

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Green Integrated Process for the Production of Compound Phosphate Fertilizer

Feng Yisheng

Strategic Study of CAE 1999, Volume 1, Issue 1,   Pages 58-62

Abstract: effective utilization of sulphur resources is achieved by employing phosphorus gypsum to make sulphuric acid

Keywords： compound phosphate fertilizer     phosphoretted gypsum     sulfuric acid     cement    

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Potential of performance improvement of concentrated solar power plants by optimizing the parabolic trough

Honglun YANG, Qiliang WANG, Jingyu CAO, Gang PEI, Jing LI

Frontiers in Energy 2020, Volume 14, Issue 4,   Pages 867-881 doi: 10.1007/s11708-020-0707-y

Abstract: proposes a comprehensive thermodynamic and economic model to predict and compare the performance of concentrated

Keywords： concentrated solar power     parabolic trough receiver     heat loss     solar energy     annual performance    

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Viability of a concentrated solar power system in a low sun belt prefecture

Rahul BHATTACHARJEE, Subhadeep BHATTACHARJEE

Frontiers in Energy 2020, Volume 14, Issue 4,   Pages 850-866 doi: 10.1007/s11708-020-0664-5

Abstract: Concentrating solar power (CSP) is considered as a comparatively economical, more efficient, and large capacity type of renewable energy technology. However, CSP generation is found restricted only to high solar radiation belt and installed where high direct normal irradiance is available. This paper examines the viability of the adoption of the CSP system in a low sun belt region with a lower direct normal irradiance (DNI). Various critical analyses and plant economics have been evaluated with a lesser DNI state. The obtained results out of the designed system, subjected to low DNI are not found below par, but comparable to some extent with the performance results of such CSP plants at a higher DNI. The analysis indicates that incorporation of the thermal energy storage reduces the levelized cost of energy (LCOE) and augments the plant capacity factor. The capacity factor, the plant efficiency, and the LCOE are found to be 32.50%, 17.56%, and 0.1952 $/kWh, respectively.

Keywords： concentrated solar power     direct normal irradiance     plant performance     plant economics     thermal energy storage    

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Degradation of refractory organics in concentrated leachate by the Fenton process: Central composite

Senem Yazici Guvenc, Gamze Varank

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 1, doi: 10.1007/s11783-020-1294-1

Abstract: Abstract • 90% total COD, 95.3% inert COD and 97.2% UV254 were removed. • High R2 values (over 95%) for all responses were obtained with CCD. • Operational cost was calculated to be 0.238 €/g CODremoved for total COD removal. • Fenton oxidation was highly-efficient method for inert COD removal. • BOD5/COD ratio of leachate concentrate raised from 0.04 to 0.4. The primary aim of this study is inert COD removal from leachate nanofiltration concentrate because of its high concentration of resistant organic pollutants. Within this framework, this study focuses on the treatability of leachate nanofiltration concentrate through Fenton oxidation and optimization of process parameters to reach the maximum pollutant removal by using response surface methodology (RSM). Initial pH, Fe2+ concentration, H2O2/Fe2+ molar ratio and oxidation time are selected as the independent variables, whereas total COD, color, inert COD and UV254 removal are selected as the responses. According to the ANOVA results, the R2 values of all responses are found to be over 95%. Under the optimum conditions determined by the model (pH: 3.99, Fe2+: 150 mmol/L, H2O2/Fe2+: 3.27 and oxidation time: 84.8 min), the maximum COD removal efficiency is determined as 91.4% by the model. The color, inert COD and UV254 removal efficiencies are determined to be 99.9%, 97.2% and 99.5%, respectively, by the model, whereas the total COD, color, inert COD and UV254 removal efficiencies are found respectively to be 90%, 96.5%, 95.3% and 97.2%, experimentally under the optimum operating conditions. The Fenton process improves the biodegradability of the leachate NF concentrate, increasing the BOD5/COD ratio from the value of 0.04 to the value of 0.4. The operational cost of the process is calculated to be 0.238 €/g CODremoved. The results indicate that the Fenton oxidation process is an efficient and economical technology in improvement of the biological degradability of leachate nanofiltration concentrate and in removal of resistant organic pollutants.

Keywords： Concentrated leachate     Fenton oxidation     Central composite design     Biodegradability     Inert COD    

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Corrosion behavior of metallic alloys in molten chloride salts for thermal energy storage in concentrated

Wenjin Ding, Alexander Bonk, Thomas Bauer

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 3,   Pages 564-576 doi: 10.1007/s11705-018-1720-0

Abstract:

Recently, more and more attention is paid on applications of molten chlorides in concentrated solar

Keywords： corrosion mechanisms     impurities     metallic corrosion     salt purification     electrochemical techniques    

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Copper recovery from waste printed circuit boards concentrated metal scraps by electrolysis

Xiaonan Liu, Qiuxia Tan, Yungui Li, Zhonghui Xu, Mengjun Chen

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 5, doi: 10.1007/s11783-017-0997-4

Abstract: In this study, we proposed a feasible and efficient way to recover copper from WPCBs concentrated metal

Keywords： Waste printed circuit boards (WPCBs)     Copper     Recovery rate     Purity     Electrolysis    

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Progress in Research and Development of Molten Chloride Salt Technology for Next Generation Concentrated Review

Wenjin Ding, Thomas Bauer

Engineering 2021, Volume 7, Issue 3,   Pages 334-347 doi: 10.1016/j.eng.2020.06.027

Abstract:

Concentrated solar power (CSP) plants with thermal energy storage (TES) system are emerging as one

Keywords： Solar energy     Concentrated solar power (CSP)     Thermal energy storage (TES)     Heat transfer fluid (HTF)    

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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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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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Title Author Date Type Operation

One-step synthesis of

Kuiyi YOU, Fangfang ZHAO, Xueyan LONG, Pingle LIU, Qiuhong AI, Hean LUO

Journal Article

Octane compositions in sulfuric acid catalyzed isobutane/butene alkylation products: experimental and

Lina Liang, Youzhi Liu, Weizhou Jiao, Qiaoling Zhang, Chao Zhang

Journal Article

Comparison of prechilling stratification and sulfuric acid scarification on seed germination of

Nan WANG, Jing GAO, Suiqi ZHANG, Feng YAN

Journal Article

Resistance to acid degradation, sorptivity, and setting time of geopolymer mortars

Osama A MOHAMED; Rania AL-KHATTAB; Waddah AL-HAWAT

Journal Article

Green Integrated Process for the Production of Compound Phosphate Fertilizer

Feng Yisheng

Journal Article

Potential of performance improvement of concentrated solar power plants by optimizing the parabolic trough

Honglun YANG, Qiliang WANG, Jingyu CAO, Gang PEI, Jing LI

Journal Article

Viability of a concentrated solar power system in a low sun belt prefecture

Rahul BHATTACHARJEE, Subhadeep BHATTACHARJEE

Journal Article

Degradation of refractory organics in concentrated leachate by the Fenton process: Central composite

Senem Yazici Guvenc, Gamze Varank

Journal Article

Corrosion behavior of metallic alloys in molten chloride salts for thermal energy storage in concentrated

Wenjin Ding, Alexander Bonk, Thomas Bauer

Journal Article

Copper recovery from waste printed circuit boards concentrated metal scraps by electrolysis

Xiaonan Liu, Qiuxia Tan, Yungui Li, Zhonghui Xu, Mengjun Chen

Journal Article

Progress in Research and Development of Molten Chloride Salt Technology for Next Generation Concentrated

Wenjin Ding, Thomas Bauer

Journal Article

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

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