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Effective diffusivity of oxygen in the ash layer of Huadian oil shale semicoke

Yiqun HUANG, Yiran LI, Man ZHANG, Boyu DENG, Hao KONG, Junfeng WANG, Junfu LYU, Hairui YANG, Lingmei WANG

Frontiers in Energy 2021, Volume 15, Issue 2,   Pages 320-327 doi: 10.1007/s11708-020-0674-3

Abstract: Diffusion of oxygen in the ash layer usually dominated the combustion of oil shale semicoke particlesThus, effective diffusivity of oxygen in the ash layer was a crucial parameter worthy of careful investigationIn this paper, the effective diffusivity of oxygen in the ash layer of Huadian oil shale semicoke waslayer had the negative effect.layer of oil shale semicoke.

Keywords： oil shale semicoke     diffusivity     pore structure     ash layer    

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Compositional and structural study of ash deposits spatially distributed in superheaters of a large biomass-fired

Yishu XU, Xiaowei LIU, Jiuxin QI, Tianpeng ZHANG, Minghou XU, Fangfang FEI, Dingqing LI

Frontiers in Energy 2021, Volume 15, Issue 2,   Pages 449-459 doi: 10.1007/s11708-021-0734-3

Abstract: Recognizing the nature and formation progress of the ash deposits is essential to resolve the depositionTherefore, the ash deposits in the superheaters of a 220 t/h biomass-fired CFB boiler were studied, includingdeposits in the PSs and HTSs were thin (several millimeters) and compact, consisting of a yellow outer layerand snow-white inner layer near the tube surface.In addition, although the condensation of KCl in the LTSs also happened, the deposition of ash particles

Keywords： ash deposition     biomass combustion     circulating fluidized bed     initial layer     structure analysis    

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Effect of fineness of ash on pozzolanic properties and acid resistance of sugarcane bagasse ash replaced

Shan E ALI; Rizwan AZAM; Muhammad Rizwan RIAZ; Mohamed ZAWAM

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 10,   Pages 1287-1300 doi: 10.1007/s11709-022-0872-7

Abstract: This paper addresses the potential use of Sugar Cane Bagasse Ash (SCBA) as a pozzolanic material for

Keywords： durability     cement replacement     sugarcane bagasse ash     fineness of ash     pozzolanic properties     mortar    

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Fresh and hardened properties of high-performance fiber-reinforced concrete containing fly ash and ricehusk ash: Influence of fiber type and content

Nguyen-Trong HO; Viet Quoc DANG; Minh-Hieu NGUYEN; Chao-Lung HWANG; Trong-Phuoc HUYNH

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 12,   Pages 1621-1632 doi: 10.1007/s11709-022-0884-3

Abstract: fiber-reinforced concrete (HPFRC) designed using a novel densified mixture design algorithm with fly ashand rice husk ash.

Keywords： high-performance fiber-reinforced concrete     fly ash     rice husk ash     durability     mechanical strength    

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Effects of sulfur on variations in the chemical speciation of heavy metals from fly ash glass

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 10, doi: 10.1007/s11783-023-1728-7

Abstract:

● A higher sulfur content reduced the curing rate of Cr in glass.

Keywords： Dechlorinated fly ash     SO3     Heavy metal     Chemical speciation     Glass solidification    

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Direct synthesis of carbon nanotubes on fly ash particles to produce carbon nanotubes/fly ash composites

Fangxian LI, Cheng ZHOU, Pengfei YANG, Beihan WANG, Jie HU, Jiangxiong WEI, Qijun YU

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 6,   Pages 1405-1414 doi: 10.1007/s11709-019-0564-0

Abstract: Fly ash was used as catalytic support for carbon nanotubes (CNTs) growth by chemical vapor depositionIn this paper, CNTs were synthesized on Ni catalyst/fly ash substrate using CVD method.and hydrogen flow rate would decrease in defect density and increase in yield of as-grown CNTs on fly ash

Keywords： carbon nanotubes     fly ash     chemical vapor deposition     parameters     purification    

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Effect of circulating ash from CFB boilers on NO and N

Xiangsong HOU, Shi YANG, Junfu LU, Hai ZHANG, Guangxi YUE

Frontiers in Energy 2009, Volume 3, Issue 2,   Pages 241-246 doi: 10.1007/s11708-009-0006-0

Abstract: The effect of circulating ash from a CFB boiler on NO and N O emissions were investigated in a laboratory-scaleThe results show that the residue char in circulating ash and the CO generated from the char play animportant role in NO reduction and N O formation; however, active components of circulating ash suchThe lower residue carbon content of circulating ash in this experiment is lower; therefore, the reacting

Keywords： CFB boiler     circulating ash     NO reduction     N2O thermal decomposition     biomass    

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Accelerated engineering properties of high and low volume fly ash concretes reinforced with glued steel

Vallarasu Manoharan SOUNTHARARAJAN, Dr. Anandan SIVAKUMAR

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 4,   Pages 429-445 doi: 10.1007/s11709-013-0226-6

Abstract: The present study focuses on the improvement of pozzolanic reaction of fly ash particles with the cementLow and high volume fly ash concrete mixtures were studied systematically with the addition of acceleratingreinforcing effects of glued steel fibers addition on the compressive and flexural performance of fly ashA maximum increase (41.7%) in compressive strength of fly ash concrete around 52.90 MPa was noticed for25% fly ash substitution and 1.5% steel fibers addition.

Keywords： fly ash     pozzolanic index     steam curing     superplasticizer     accelerator     steel fibres     elastic modulus    

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Effects of seeding nucleation agent on geopolymerization process of fly-ash geopolymer

Lapyote PRASITTISOPIN, Issara SEREEWATTHANAWUT

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 1,   Pages 16-25 doi: 10.1007/s11709-016-0373-7

Abstract: viability to substitute traditional concrete made of portland cement (PC) because replacing PC with fly ashAlthough fly ash geopolymer stimulates sustainability, it is slow geopolymerization reaction poses aThe purpose of this study is to evaluate seeding nucleation agents (NA) of fly ash geopolymer that canused to increase geopolymerization reaction rate and improve performance characteristics of the fly ash

Keywords： fly ash     geopolymer     nucleation agent     portland cement replacement    

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Service life prediction of fly ash concrete using an artificial neural network

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 3,   Pages 793-805 doi: 10.1007/s11709-021-0717-9

Abstract: For this purpose, the present work estimates the lifetime of fly ash concrete by developing a carbonationBackpropagation training of a three-layer perceptron was selected for the calculation of weights andSix parameters affecting carbonation were used as input neurons: binder content, fly ash substitutionnetwork has strong potential as a feasible tool to accurately predict the carbonation depth of fly ashmathematical formula is proposed that can be used to successfully estimate the service life of fly ash

Keywords： concrete     fly ash     carbonation     neural networks     experimental validation     service life    

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Fault simulation of boiler heating surface ash deposition in a power plant system

Weiwei ZHANG, Huisheng ZHANG, Ming SU

Frontiers in Energy 2011, Volume 5, Issue 4,   Pages 435-443 doi: 10.1007/s11708-011-0162-x

Abstract: The performances of the power plant under the conditions of the furnace slagging and ash deposition of

Keywords： boiler     slagging     ash deposition     fault simulation    

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Effect of fly ash replacement level on the fracture behavior of concrete

Mahdi AREZOUMANDI, Jeffery S. VOLZ

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 4,   Pages 411-418 doi: 10.1007/s11709-013-0228-4

Abstract: One method of reducing concrete’s contribution to greenhouse gas emissions is the use of fly ash to replaceThis study presents the results of an experimental investigation that evaluates effect of fly ash replacementThis study includes four mixes with 0%, 30%, 50%, and 70% fly ash as a cement replacement.Results of these statistical tests show that the mix with higher level of fly ash replacement level has

Keywords： concrete     fracture energy     fly ash    

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Experimental studies of ash film fractions based on measurement of cenospheres geometry in pulverized

Siqi LIU, Yanqing NIU, Liping WEN, Yang LIANG, Bokang YAN, Denghui WANG, Shi’en HUI

Frontiers in Energy 2021, Volume 15, Issue 1,   Pages 91-98 doi: 10.1007/s11708-020-0806-9

Abstract: In pulverized coal particle combustion, part of the ash forms the ash film and exerts an inhibitory influenceon combustion by impeding the diffusion of oxygen to the encapsulated char core, while part of the ashDespite the considerable ash effects on combustion, the fraction of ash film still remains unclear.The fraction of ash film is the ratio of the measuring mass of ash film and the total ash in coal particleThe high fraction of ash film provides a reasonable explanation for the extinction event at the late

Keywords： ash film fraction     cenospheres     coal combustion     fly ash    

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The investigation of fly ash based asphalt binders using atomic force microscope

Rajan SAHA, Kyle MALLOY, Emil BAUTISTA, Konstantin SOBOLEV

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 4,   Pages 380-387 doi: 10.1007/s11709-017-0437-3

Abstract: In this study AFM was used to investigate the interaction of asphalt binder with fly ash.Fly ash is a coal combustion byproduct of electric power utilities having pozzolanic properties and commonlyIn this study, an investigation was made by using different types of fly ash with two types of asphaltThe interaction of these phases affected by introducing fly-ash was investigated and correlation with

Keywords： AFM     fly ash     bee     rheology     asphalt    

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Porous silica synthesis out of coal fly ash with no residue generation and complete silicon separation

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 9, doi: 10.1007/s11783-023-1712-2

Abstract: ListItem>

● Both amorphous and crystalline silicon are completely separated from coal fly ash

Keywords： Coal fly ash     Alkali fusion     Micro-/meso-porous Si     Zeolite MCM-48     Crystalline transformation    

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Title Author Date Type Operation

Effective diffusivity of oxygen in the ash layer of Huadian oil shale semicoke

Yiqun HUANG, Yiran LI, Man ZHANG, Boyu DENG, Hao KONG, Junfeng WANG, Junfu LYU, Hairui YANG, Lingmei WANG

Journal Article

Compositional and structural study of ash deposits spatially distributed in superheaters of a large biomass-fired

Yishu XU, Xiaowei LIU, Jiuxin QI, Tianpeng ZHANG, Minghou XU, Fangfang FEI, Dingqing LI

Journal Article

Effect of fineness of ash on pozzolanic properties and acid resistance of sugarcane bagasse ash replaced

Shan E ALI; Rizwan AZAM; Muhammad Rizwan RIAZ; Mohamed ZAWAM

Journal Article

Fresh and hardened properties of high-performance fiber-reinforced concrete containing fly ash and ricehusk ash: Influence of fiber type and content

Nguyen-Trong HO; Viet Quoc DANG; Minh-Hieu NGUYEN; Chao-Lung HWANG; Trong-Phuoc HUYNH

Journal Article

Effects of sulfur on variations in the chemical speciation of heavy metals from fly ash glass

Journal Article

Direct synthesis of carbon nanotubes on fly ash particles to produce carbon nanotubes/fly ash composites

Fangxian LI, Cheng ZHOU, Pengfei YANG, Beihan WANG, Jie HU, Jiangxiong WEI, Qijun YU

Journal Article

Effect of circulating ash from CFB boilers on NO and N

Xiangsong HOU, Shi YANG, Junfu LU, Hai ZHANG, Guangxi YUE

Journal Article

Accelerated engineering properties of high and low volume fly ash concretes reinforced with glued steel

Vallarasu Manoharan SOUNTHARARAJAN, Dr. Anandan SIVAKUMAR

Journal Article

Effects of seeding nucleation agent on geopolymerization process of fly-ash geopolymer

Lapyote PRASITTISOPIN, Issara SEREEWATTHANAWUT

Journal Article

Service life prediction of fly ash concrete using an artificial neural network

Journal Article

Fault simulation of boiler heating surface ash deposition in a power plant system

Weiwei ZHANG, Huisheng ZHANG, Ming SU

Journal Article

Effect of fly ash replacement level on the fracture behavior of concrete

Mahdi AREZOUMANDI, Jeffery S. VOLZ

Journal Article

Experimental studies of ash film fractions based on measurement of cenospheres geometry in pulverized

Siqi LIU, Yanqing NIU, Liping WEN, Yang LIANG, Bokang YAN, Denghui WANG, Shi’en HUI

Journal Article

The investigation of fly ash based asphalt binders using atomic force microscope

Rajan SAHA, Kyle MALLOY, Emil BAUTISTA, Konstantin SOBOLEV

Journal Article

Porous silica synthesis out of coal fly ash with no residue generation and complete silicon separation

Journal Article