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physicochemical properties of Coal Gasification Fly Ash from Circulating Fluidized Bed Gasifier

Journal of Thermal Science 2023年第4期32卷 1710-1720页

作者： YANG Qiyao QI Xiaobin LYU Qinggang ZHU Zhiping School of Energy Power and Mechanical EngineeringNorth China Electric Power UniversityBeijing102206China Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing100190China University of Chinese Academy of Sciences Beijing100049China

The coal gasification fly ash(CGFA) is an industrial solid waste from coal gasification process and needs to be effectively disposed for environmental protection and resource *** further clarify the feasibility of CGFA to prepare porous carbon materials,the physicochemical properties of ten kinds of CGFA from circulating fluidized bed(CFB) gasifiers were analyzed in *** results of proximate and ultimate analysis show that the CGFA is characterized with the features of near zero moisture content,low volatile content as low as 0.90%-9.76%,high carbon content in the range of 37.89%-81.62%,and ultrafine particle size(d50=15.8-46.2 μm).The automatic specific surface area(SSA) and pore size analyzer were used to detect the pore structure,it is found that the pore structure of CGFA is relatively developed,and part of the CGFA has the basic conditions to be used directly as porous carbon *** SEM images,the microscopic morphology of the CGFA is significantly different,and they basically have the characteristics of loose and porous *** and Roman spectroscopy were used to characterize the carbon *** result shows that the CGFA contains abundant amorphous carbon structure,and thus the CGFA has a good reactivity and a potential to improve pore structure through further *** thermal gravimetric analysis,it can be concluded that the order of reactivity of the CGFA under CO_(2) atmosphere has a good correlation with the degree of metamorphism of the raw *** gasification reactivity of the CGFA is generally consistent with the change trend of micropores combined with the pore *** to the physicochemical properties,the CGFA has a good application prospect in the preparation of porous carbon materials.

关键词： circulating fluidized bed coal gasification fly ash physicochemical properties pore structure porous carbon materials

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physicochemical properties and antibacterial mechanism of theabrownins prepared from different catechins catalyzed by polyphenol oxidase and peroxidase

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Journal of Integrative Agriculture 2023年第9期22卷 2905-2916页

作者： CHEN Xiao-qiang LIU Jia-yan HUANG Xue-jun WEI Yan-an SHAO Rui-xiang CHEN Ting-ting XIE Jian-chun Cooperative Innovation Center of Industrial Fermentation(Ministry of Education&Hubei Province)/Key Laboratory of Fermentation Engineering(Ministry of Education)/School of Bioengineering and Food Hubei University of TechnologyWuhan 430068P.R.China School of Light Industry Beijing Technology&Business University(BTBU)Beijing 100048P.R.China

Theabrownins(TBs)are the characteristic functional and quality components of dark teas such as Pu’er tea and Chin-brick *** are a class of water-soluble brown polymers with multi-molecular weight distribution produced by the oxidative polymerisation of tea polyphenols during the fermentation process of dark tea,both enzymatically and *** have been extracted and purified from dark tea all the time,but the obtained TBs contain heterogeneous components such as polysaccharides and caffeine in the bound state,which are difficult to *** isolation and purification process was tedious and required the use of organic solvents,which made it difficult to industrialise *** this study,epigallocatechin(EGC),epigallocatechin gallate(EGCG),epigallocatechin gallate(ECG),EGC/EGCG(mass ratio 1:1),EGCG/ECG(mass ratio 1:1),EGC/ECG(mass ratio 1:1)and EGC/EGCG/ECG(mass ratio 1:1:1)as substrates and catalyzed by polyphenol oxidase(PPO)and peroxidase(POD)in turn to produce TBs,named TBs-dE-1,TBs-dE-2,TBs-dE-3,TBs-dE-4,TBs-dE-5,TBs-dE-6 and *** physicochemical properties and the antibacterial activity and mechanism of TBs-dE-1–7 were *** and colour difference measurements showed that all seven tea browning samples showed varying degrees of brownish *** potential in aqueous solutions at pH 3.0–9.0 indicated that TBs-dE-1–7 was negatively charged and the potential increased with increasing *** characteristic absorption peaks of TBs-dE-1–7 were observed at 208 and 274 nm by UV-visible(UV-vis)scanning *** transform infrared(FT-IR)spectra indicated that they were phenolic ***-dE-1–7 showed significant inhibition of Escherichia coli DH5α(*** DH5α).TBs-dE-3 showed the strongest inhibitory effect with minimum inhibitory concentration(MIC)of 1.25 mg mL–1 and MBC of 10 mg mL–1,followed by TBs-dE-5 and *** three TBs-dEs were selected to further investigate their inhibition *** TBs-dE was

关键词： theabrownins catechin enzymatic oxidation physicochemical properties antibacterial mechanism

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physicochemical properties and Catalytic Performance of a Novel Aluminosilicate Composite Zeolite for Hydrocarbon Cracking Reaction

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China Petroleum Processing & Petrochemical Technology 2010年第1期12卷 17-22页

作者： Qi Jian Zhao Tianbo Xu Xin Li Fengyan Sun Guida Institute for Chemical Physics Beijing Institute of Technology Beijing 100081 Department of Applied Chemistry Beijing Institute of Petrochemical Technology

A novel micro-micro/mesoporous aluminosilicate ZSM-5-Y/MCM-41 composite molecular sieve with a MCM-41 type structure was synthesized through a novel process of the self-assembly of CTAB surfactant micellae with silica-alumina source originated from alkaline treatment of ZSM-5 zeolite. The physical properties of the ZSM-5- Y/MCM-41 composite molecular sieve were characterized by XRD, Py-FTIR and N2 adsorption-desorption techniques. Different kinds of molecular sieves including ZSM-5, Y zeolite, AI-MCM-41, ZSM-5/MCM-41 and ZSM-5-Y/MCM- 41 as cracking catalysts were investigated, using 1,3,5-triisopropylbenzene （1,3,5-TIPB） as the probe molecule. Catalytic tests showed that the ZSM-5-Y/MCM-41 composite molecular sieve exhibited higher catalytic activity compared with the microporous ZSM-5 zeolite, Y zeolite, mesoporous A1-MCM-41 molecular sieve and ZSM-5/MCM-41 composite molecular sieve under the same conditions. The remarkable catalytic activity was mainly attributed to the presence of the hierarchical pore structure and proper acidity in the ZSM-5-Y/MCM-41 composite catalyst. Meanwhile, a carbcnium ion mechanism was put forward for the cracking of 1,3,5-TIPB.

关键词： physicochemical properties aluminosilicate composite catalytic cracking large molecule 1 ," ~" i ! 1 ~1 ~ 1

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physicochemical properties and volatile components of pea flour fermented by Lactobacillus rhamnosus L08

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Food Bioscience 2022年第2期46卷 793-800页

作者： Mengqi Pei Zifu Zhao Song Chen E.I.Reshetnik S.L.Gribanova Chun Li Guofang Zhang Libo Liu Lin Zhao Key Laboratory of Dairy Sciences Ministry of EducationCollege of Food SciencesNortheast Agricultural UniversityHarbin150030China Inner Mongolia Yili Group Co.Ltd Hohhot010080China Far Eastern State Agrarian University Blagoveshchensk675005Russia Heilongjiang Green Food Research Institute Harbin150028China Quality&Safety Institute of Agricultural Products Heilongjiang Academy of Agricultural SciencesHarbin150086China

Pea(Pisum sativum L.)is an important source of plant ***,the use of pea flour as a food ingredient is greatly limited due to its strong beany *** this work,we investigated the effects of Lactobacillus rhamnosus L08(*** L08)fermentation on the physicochemical characteristics,amino acids composition and volatile flavor compounds of pea *** found that *** L08 had the probiotic potential of utilizing pea flour as fermentation *** L08 fermentation significantly increased the content of most amino acids,and total amino acid content increased from 222.18 mg/g at 0 h to 262.35 mg/g at 6 h.A total of 44 volatile compounds were identified in pea *** L08 fermentation increased the variety of acids and esters,while reduced the unpleasant flavor such as nonanal,decanal,octanal,1-hexanol and *** emulsifying stability and foam stability of pea flour were slightly enhanced during *** results illustrate that lactic acid bacteria fermentation is a promising approach to eliminate undesirable aroma of pea ***,this study provides theoretical support for the application of peas as high-quality protein source.

关键词： Pea flour Lactic acid bacteria Fermentation Flavor component physicochemical properties

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physicochemical properties and morphology of biochars as affected by feedstock sources and pyrolysis temperatures

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Biochar 2019年第3期1卷 325-336页

作者： Joao Arthur Antonangelo Hailin Zhang Xiao Sun Ajay Kumar Department of Plant and Soil Sciences Oklahoma State University371 Agricultural HallStillwaterOK 74078-6028USA Department of Biosystems and Agricultural Engineering Oklahoma State University111 Agricultural HallStillwaterOK 74078USA

Feedstock sources and pyrolysis temperatures affect the physicochemical and morphological properties of *** evaluated biochars derived from switchgrass(SGB)and poultry litter(PLB)pyrolyzed at 350℃(SGB350,PLB350)and 700℃(SGB700,PLB700)to identify their potential ability in improving soil *** for SGB350,the pH of biochars was high(>10.0)and can be used as an amendment in acid ***700 had higher mineral content and nutrient availability due to its higher ash content(tenfold higher)and electrical *** functional groups responsible for metal retention were evidenced in all *** exchange capacity(CEC),specific surface area(SSA),and microporosity more than doubled by increasing pyrolysis temperature from 350 to 700℃.The pH-buffering capacity measured through acid titration curve was better than that calculated with acid/alkali *** pyrolyzed at 700℃ have much higher pH,CEC,SSA,and stronger buffering capacity,and thus are more promising to improve soil health and reduce contaminant bioavailability.

关键词： Biochars Switchgrass Poultry litter physicochemical properties Pyrolysis

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physicochemical properties,antioxidant and anti-inflammatory activities of coumarin-carbonodithioate hybrids

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Asian Pacific Journal of Tropical Biomedicine 2018年第4期8卷 201-206页

作者： Suresh S.Kumbar Kallappa M.Hosamani Arun K.Shettar Department of Studies in Chemistry Kamatak University P G Department of Studies in Biotechnology and Microbiology Karnatak University

Objective:To study physicochemical properties,antioxidant and anti-inflammatory activities of coumarin-carbonodithioate ***:The substituted 4-bromomethyl coumarins were synthesized in first step by the *** the reaction of substituted coumarins(a-e)with potassium O-ethyl/methyl carbonodithioate(1)by using absolute ethanol as solvent,afforded coumarin-carbonodithioate(1a-1j)derivatives under microwave irradiation and the conventional *** spectroscopic analysis was used for the characterization of coumarin *** title(1a-1j)compounds were confirmed by spectroscopic *** property was evaluated by using DPPH free radical-scavenging ability assay method and anti-inflammatory activity was evaluated by protein denaturation procedure using diclofenac sodium as a ***-silico toxicity was predicted with LD_(50)value and bioactivity score was also calculated for all the ***:All coumarin(1a-1j)compounds exhibited promisingin-vitro antioxidant and anti-inflammatory properties in comparison to standard *** tested compounds were used for evaluating their physicochemical properties as set by Lipinski *** was observed that the synthesized compounds followed rule of five,indicating more'drug-like'***:All the screened coumarin-carbonodithioates display promising in vitro antioxidant and antiinflammatory *** the physicochemical properties of coumarin derivatives,it is found that none of the compounds violate the Lipinski rule and they fall well in the range of rule of *** is concluded that the coumarin-carbonodithioate hybrids act with more'drug-like'nature.

关键词： physicochemical properties Coumarin-carbonodithioates In vitro antioxidant activity In vitro anti-inflammatory activity

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physicochemical properties of 1,3-dimethyl-2-imidazolinone−ZnCl_(2)solvated ionic liquid and its application in zinc electrodeposition

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Transactions of Nonferrous Metals Society of China 2021年第3期31卷 832-841页

作者： Ai-min LIU Meng-xia GUO Zhong-ning SHI Yu-bao LIU Feng-guo LIU Xian-wei HU You-jian YANG Wen-ju TAO Zhao-wen WANG Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education) Northeastern UniversityShenyang 110819China State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization Baotou Research Institute of Rare EarthsBaotou 014030China

Zinc chloride(ZnCl_(2))was dissolved in the 1,3-dimethyl-2-imidazolinone(DMI)solvent,and the metallic zinc coatings were obtained by electrodeposition in room-temperature ambient *** conductivity(σ),viscosity(η),and density(ρ)of the DMI−ZnCl_(2)solvated ionic liquid at various temperatures(T)were measured and ***,cyclic voltammetry was used to study the electrochemical behavior of Zn(II)in the DMI−ZnCl_(2)solvated ionic liquid,indicating that the reduction of Zn(II)on the tungsten electrode was a one-step two-electron transfer irreversible *** and SEM−EDS analysis of the cathode product confirmed that the deposited coating was metallic ***,the effects of deposition potential,temperature and duration on the morphology of zinc coatings were *** results showed that a dense and uniform zinc coating was obtained by potentiostatic electrodeposition at−2 V(vs Pt)and 353 K for 1 h.

关键词： electrodeposition zinc 1,3-dimethyl-2-imidazolinone physicochemical properties cyclic voltammetry

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physicochemical properties of arsenic-bearing lime-ferrate sludge and its leaching behaviors

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Transactions of Nonferrous Metals Society of China 2017年第5期27卷 1188-1198页

作者： Bing PENG Jie LEI Xiao-bo MIN Li-yuan CHAI Yan-jie LIANG Yang YOU School of Metallurgy and Environment Central South University Changsha 410083 China Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution Central South University Changsha 410083 China

physicochemical properties and leaching behaviors of two typical arsenic-bearing lime?ferrate sludges(ABLFS),waste acid residue(WAR)and calcium arsenate residue(CAR),are comprehensively *** chemical composition,morphological features,phase composition and arsenic occurrence state of WAR and CAR are analyzed by ICP?AES,SEM?EDS,XRD,XPS and chemical phase *** toxicity leaching test and three-stage BCR sequential extraction procedure are utilized to investigate arsenic leaching *** results show that the contents of arsenic in WAR and CAR are2.5%and21.2%and mainly present in the phases of arsenate and arsenic oxides dispersed uniformly or agglomerated in amorphous *** leaching concentrations of arsenic excess119and1063times of TCLP standard regulatory level with leaching rates of47.66%and50.15%for WAR and CAR,***90%of extracted arsenic is in the form of acid soluble and reducible,which is the reason of high arsenic leaching toxicity and environmental activity of *** research provides comprehensive information on harmless disposal of ABLFS from industrial wastewater treatment of lime?ferrate process.

关键词： arsenic-bearing sludge lime.ferrate sludge physicochemical properties leaching behavior BCR sequential extraction

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Relationship between physicochemical properties and dewaterability of hydrothermal sludge derived from different source

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Journal of Environmental Sciences 2018年第7期30卷 261-270页

作者： Xiuzheng Zhuang Yanqin Huang Huacai Liu Hongyou Yuan Xiuli Yin Chuangzhi Wu Cuangzhou Institute of Energy Conversion Chinese Academy of Sciences Guangzhou 501640 China CAS Key Laboratory of Renewable Energy Guangzhou 501640 China Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development Guangzhou 501640 China University of Chinese Academy of Sciences Beijing 10049 China

Sewage sludge（SS） and deinking sludge（DS） were used to comparatively study the hydrothermal dewatering of sludge with different components. For a better overview, an insight into the relationship between physicochemical properties and dewaterability of hydrothermal sludge was provided. Results found that not all kinds of sludge were suitably conditioned by hydrothermal treatment（HT） in term of the elevation of *** hydrothermal temperature tended to enhance the dewaterability of SS rather than DS, which was supported by the variation of their physicochemical properties（including water distribution, bonding energy, extracellular polymeric substance（EPS）, particles size,acid functional groups and zeta potential in this study）. In addition, the changes in surface morphology suggested that the reverse effect of HT on sludge dewaterability was mainly due to their dewatering behavior. For SS, the destruction of EPS structure leaded to the release of bound water, thereby strengthening sludge dewatering. Conversely, ＂Bridging effect＂ generated by lignocellulose in DS was beneficial for sludge dewatering; however, the increasing hydrothermal temperature degraded part of lignocellulose and weakened＂bridging effect＂, finally resulting in worse dewaterability of DS.

关键词： Sludge component Hydrothermal treatment Dewatering behavior physicochemical properties

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physicochemical properties of DMI-LiNO_(3) solvated ionic liquid and its application in electrodeposition of neodymium at room temperature

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Transactions of Nonferrous Metals Society of China 2021年第8期31卷 2522-2531页

作者： Ai-min LIU Yu YAO Meng-xia GUO Yu-bao LIU Zhong-ning SHI Feng-guo LIU Xian-wei HU Wen-cai HE Zhao-wen WANG Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education) Northeastern UniversityShenyang 110819China State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization Baotou Research Institute of Rare EarthsBaotou 014030China State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China

The density,conductivity,and viscosity of the 1,3-dimethyl-2-imidazolinone and lithium nitrate(DMILiNO_(3))solvated ionic liquid were measured as a function of ***,the electrochemical mechanism and electrodeposition of neodymium from the DMI-LiNO_(3) solvated ionic liquid were *** voltammetry results indicate that the electrochemical reduction of Nd(Ⅲ)is irreversible and proceeds via one-step with three-electron transfer,which is controlled by diffusion with a diffusion coefficient of 5.08×10^(-8) cm^(2)/*** X-ray spectrometry and X-ray photoelectron spectroscopy data confirm that the electrodeposit obtained after electrodeposition at-4 V(vs Ag)using the DMI-LiNO_(3)-Nd(CF_(3)SO_(3))_(3) solvated ionic liquid contains metallic neodymium.

关键词： electrodeposition neodymium ionic liquid physicochemical properties cyclic voltammetry

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