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Particle formation of hydroxyapatite precursor containing two components in a spray pyrolysis process

W. Widiyastuti, Adhi Setiawan, Sugeng Winardi, Tantular Nurtono, Heru Setyawan

Frontiers of Chemical Science and Engineering 2014, Volume 8, Issue 1,   Pages 104-113 doi: 10.1007/s11705-014-1406-1

Abstract: The particle formation mechanism of hydroxyapatite precursor containing two components, Ca(OOCCH ) and (NH ) HPO with a ratio of Ca/P= 1.67, in a spray pyrolysis process has been studied by computational fluid dynamics (CFD) simulation on the transfer of heat and mass from droplets to the surrounding media. The focus included the evaporation of the solvent in the droplets, a second evaporation due to crust formation, the decomposition reaction of each component of the precursor, and a solid-state reaction that included the kinetic parameters of the precursor regarding its two components that formed the hydroxyapatite product. The rate of evaporation and the reacted fraction of the precursor both increased with temperature. The predicted average size of the hydroxyapatite particles agreed well with the experimental results. Therefore, the selected models were also suitable for predicting the average size of particles that contain two components in the precursor solution.

Keywords： droplet     hydroxyapatite particle     CFD     tubular furnace     spray pyrolysis    

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Performance study on T-stub connected semi-rigid joint between rectangular tubular columns and H-shaped

Guochang LI, Hongping YU, Chen FANG

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 3,   Pages 296-303 doi: 10.1007/s11709-013-0217-7

Abstract: This paper investigates the performance of T-stub connected semi-rigid joint of rectangular tubular columns

Keywords： rectangular tubular columns     T-stub     semi-rigid     nonlinear finite element analysis     moment-rotation curves    

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Extension of pilot tests of cyanide elimination by ozone from blast furnace gas washing water through

Ismael Matino, Valentina Colla, Teresa A. Branca

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 4,   Pages 718-730 doi: 10.1007/s11705-018-1771-2

Abstract:

For improving wastewater quality, one of the dare of steelworks is reducing cyanide in wastewater of gas washing treatment of blast furnaces. Costs of existing treatments, stringent environmental regulations and changeable composition of water from gas treatment, have led to study how available treatments can be modified and to examine new ones. Ozonation is one of cyanide treatments, tested within a European project. A process model was set up with Aspen Plus®, to assess operating conditions and wastewater distinctive characteristics and to demonstrate treatment robustness. Process was modeled by theoretical reactors, taking into account all more affecting reactions. A genetic algorithm was exploited to find kinetic parameters of these reactions. After validation, the model was used to analyse scenarios, by considering also real contexts. Pilot tests were extended, process knowledge was enhanced and suggestions were obtained. To promote cyanide removal with ozone, temperature and pH values were 30°C and 10, respectively. With an ozone (mg/h)/water (L/h) ratio of 100 mg/L, batch mode ensure reaching cyanide regulation limit (0.2 mg/L) after maximum 4.5 h, if initial amount was less than 20 mg/L. Higher removal was obtained than in continuous mode due to constraints related to this last run. Higher wastewater contamination needed further time and more ozone.

Keywords： blast furnace     cyanide removal     gas washing water     modeling and simulation     ozonation    

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A numerical study of prestressed high strength steel tubular members

Michaela GKANTOU, Marios THEOFANOUS, Charalampos BANIOTOPOULOS

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 1,   Pages 10-22 doi: 10.1007/s11709-019-0547-1

Abstract: The structural behavior of prestressed high strength steel (HSS) tubular members is investigated throughNumerical models are developed and validated against published experimental data on HSS tubular membersDesign guidance for tensile and compressive prestressed tubular members is also provided.

Keywords： finite element     prestressing     tubular members     grout     high strength steel    

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Theoretical study on flow and radiation in tubular solar photocatalytic reactor

Frontiers in Energy 2021, Volume 15, Issue 3,   Pages 687-699 doi: 10.1007/s11708-021-0773-9

Abstract: based on the mixture flow model, an optimized six-flux model is first established and applied to the tubular

Keywords： photocatalytic hydrogen photoreactor     nume- rical simulation     solar energy     flow model     radiation model    

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Preventive effect of Shenkang injection against high glucose-induced senescence of renal tubular cells

Biqiong Fu, Jie Yang, Jia Chen, Lirong Lin, Kehong Chen, Weiwei Zhang, Jianguo Zhang, Yani He

Frontiers of Medicine 2019, Volume 13, Issue 2,   Pages 267-276 doi: 10.1007/s11684-017-0586-8

Abstract: This study aimed to investigate the protective effect of SKI against high glucose (HG)-induced renal tubularanti-senescence molecules klotho, sirt1, and peroxisome proliferator-activated receptor- in renal tubularSKI may be a novel strategy for protecting against HG-induced renal tubular cell senescence in treatment

Keywords： Shenkang injection     senescence     renal tubular epithelial cells     diabetic nephropathy    

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Factors affecting production of nonaqueous peracetic acid in tubular packed reactors

ZHANG Tengyun, FAN Hongbo, ZHONG Li, CHUANG Karl

Frontiers of Chemical Science and Engineering 2008, Volume 2, Issue 2,   Pages 196-203 doi: 10.1007/s11705-008-0037-9

Abstract: The synthesis of nonaqueous peracetic acid in acetone by acetaldehyde oxidation was carried out in a tubular
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The Research of the Detecting Means for the New Model of the Gas Density in Recycled Waste Gas Furnace

Shen Yuansheng,Liu Yongjie,Wang Deyong,Li Benwen

Strategic Study of CAE 2005, Volume 7, Issue 5,   Pages 70-72

Abstract:

By analyzing the feature of the process for the recycled waste gas in furnace, let the volume of wasteflow of waste gas and the recycled times of waste gas which goes into combustion-supporting air in furnace

Keywords： tested model     combustion material     combustion ratio     recycling furnace    

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Moment-curvature relationship of FRP-concrete-steel double-skin tubular members

Mingxue LIU, Jiaru QIAN

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 1,   Pages 25-31 doi: 10.1007/s11709-009-0012-7

Abstract: specimens to study the flexural behavior of fiber reinforced polymer (FRP)-concrete-steel double-skin tubular

Keywords： fiber reinforced polymer (FRP)     concrete     steel     double-skin tubular members (DSTMs)     moment-curvature curve    

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Review of the crushing response of collapsible tubular structures

Vivek PATEL, Gaurav TIWARI, Ravikumar DUMPALA

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 3,   Pages 438-474 doi: 10.1007/s11465-019-0579-1

Abstract: Studies on determining and analyzing the crushing response of tubular structures are of significant interestSeveral aspects of tubular structures, such as geometry, material, configuration, and hybrid structurethe important findings of extensive research on understanding the crushing response of thin-walled tubulartriggering mechanism on initiating plastic deformation, such as cutouts and grooves, on the surface of tubular

Keywords： monolithic structure     crashworthiness     energy absorber     static and dynamic loadings     multicellular tube structure     filled tube    

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numerical investigations of the compressive behavior of carbon fiber-reinforced polymer-strengthened tubular

Peng DENG, Boyi YANG, Xiulong CHEN, Yan LIU

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 5,   Pages 1215-1231 doi: 10.1007/s11709-020-0663-y

Abstract: A method for strengthening damaged tubular steel T-joints under axial compression by wrapping them withthe effects of different geometric and strengthening parameters on the load capacity of strengthened tubularwrapping, and indicated the optimal CFRP strengthening thickness and wrapping orientation according to tubularThe findings of this study can be used to inform improved CFRP strengthening of damaged tubular steel

Keywords： tubular T-joint     carbon fiber-reinforced polymer     degree of damage     numerical analysis     equivalent plastic    

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An investigation of reaction furnace temperatures and sulfur recovery

S. ASADI, M. PAKIZEH, M. POURAFSHARI CHENAR

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 3,   Pages 362-371 doi: 10.1007/s11705-011-1106-z

Abstract: In a modern day sulfur recovery unit (SRU), hydrogen sulfide (H S) is converted to elemental sulfur using a modified Claus unit. A process simulator called TSWEET has been used to consider the Claus process. The effect of the H S concentration, the H S/CO ratio, the input air flow rate, the acid gas flow of the acid gas (AG) splitter and the temperature of the acid gas feed at three different oxygen concentrations (in the air input) on the main burner temperature have been studied. Also the effects of the tail gas ratio and the catalytic bed type on the sulfur recovery were studied. The bed temperatures were optimized in order to enhance the sulfur recovery for a given acid gas feed and air input. Initially when the fraction of AG splitter flow to the main burner was increased, the temperature of the main burner increased to a maximum but then decreased sharply when the flow fraction was further increased; this was true for all three concentrations of oxygen. However, if three other parameters (the concentration of H S, the ratio H S/CO and the flow rate of air) were increased, the temperature of the main burner increased monotonically. This increase had different slopes depending on the oxygen concentration in the input air. But, by increasing the temperature of the acid gas feed, the temperature of the main burner decreased. In general, the concentration of oxygen in the input air into the Claus unit had little effect on the temperature of the main burner (This is true for all parameters). The optimal catalytic bed temperature, tail gas ratio and type of catalytic bed were also determined and these conditions are a minimum temperature of 300°C, a ratio of 2.0 and a hydrolysing Claus bed.

Keywords： Claus unit     concentration of H2S     tail gas ratio     sulfur recovery     catalytic bed    

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Modelling and experimental verification on concrete-filled steel tubular columns with L or T section

LU Xilin, LI Xueping, WANG Dan

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 2,   Pages 163-169 doi: 10.1007/s11709-007-0017-z

Abstract: Concrete-filled steel tubular columns with L or T sections were analyzed in this paper.can be applied in the program of time history analysis on tall buildings with concrete-filled steel tubular

Keywords： hysteretic     confining mechanism     Concrete-filled     in-filled     composite    

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Data-driven soft sensors in blast furnace ironmaking: a survey Review Article

Yueyang LUO, Xinmin ZHANG, Manabu KANO, Long DENG, Chunjie YANG, Zhihuan SONG

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 3,   Pages 327-354 doi: 10.1631/FITEE.2200366

Abstract: The is a highly energy-intensive, highly polluting, and extremely complex reactor in the . are a key technology for predicting molten iron quality indices reflecting energy consumption and operation stability, and play an important role in saving energy, reducing emissions, improving product quality, and producing economic benefits. With the advancement of the Internet of Things, big data, and artificial intelligence, data-driven in es have attracted increasing attention from researchers, but there has been no systematic review of the data-driven in the . This review covers the state-of-the-art studies of data-driven technologies in the . Specifically, we first conduct a comprehensive overview of various data-driven soft sensor modeling methods (multiscale methods, adaptive methods, , etc.) used in ironmaking. Second, the important applications of data-driven in ironmaking (silicon content, molten iron temperature, gas utilization rate, etc.) are classified. Finally, the potential challenges and future development trends of data-driven in ironmaking applications are discussed, including digital twin, multi-source data fusion, and carbon peaking and carbon neutrality.

Keywords： Soft sensors     Data-driven modeling     Machine learning     Deep learning     Blast furnace     Ironmaking process    

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Cyclic behavior of stiffened joints between concrete-filled steel tubular column and steel beam with

Chunyan QUAN,Wei WANG,Jian ZHOU,Rong WANG

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 3,   Pages 333-344 doi: 10.1007/s11709-016-0357-7

Abstract: investigation on a stiffened joint in practical engineering which was between concrete-filled steel tubularcapacity of the specimen which were influenced by the axial compression ratio of the concrete-filled tubularno hysteresis damage fracture on the narrow outer diaphragm connected to the concrete-filled steel tubular

Keywords： narrow outer diaphragm     concrete-filled tubular column     joint     inner and outer stiffening     cyclic behavior    

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Title Author Date Type Operation

Particle formation of hydroxyapatite precursor containing two components in a spray pyrolysis process

W. Widiyastuti, Adhi Setiawan, Sugeng Winardi, Tantular Nurtono, Heru Setyawan

Journal Article

Performance study on T-stub connected semi-rigid joint between rectangular tubular columns and H-shaped

Guochang LI, Hongping YU, Chen FANG

Journal Article

Extension of pilot tests of cyanide elimination by ozone from blast furnace gas washing water through

Ismael Matino, Valentina Colla, Teresa A. Branca

Journal Article

A numerical study of prestressed high strength steel tubular members

Michaela GKANTOU, Marios THEOFANOUS, Charalampos BANIOTOPOULOS

Journal Article

Theoretical study on flow and radiation in tubular solar photocatalytic reactor

Journal Article

Preventive effect of Shenkang injection against high glucose-induced senescence of renal tubular cells

Biqiong Fu, Jie Yang, Jia Chen, Lirong Lin, Kehong Chen, Weiwei Zhang, Jianguo Zhang, Yani He

Journal Article

Factors affecting production of nonaqueous peracetic acid in tubular packed reactors

ZHANG Tengyun, FAN Hongbo, ZHONG Li, CHUANG Karl

Journal Article

The Research of the Detecting Means for the New Model of the Gas Density in Recycled Waste Gas Furnace

Shen Yuansheng,Liu Yongjie,Wang Deyong,Li Benwen

Journal Article

Moment-curvature relationship of FRP-concrete-steel double-skin tubular members

Mingxue LIU, Jiaru QIAN

Journal Article

Review of the crushing response of collapsible tubular structures

Vivek PATEL, Gaurav TIWARI, Ravikumar DUMPALA

Journal Article

numerical investigations of the compressive behavior of carbon fiber-reinforced polymer-strengthened tubular

Peng DENG, Boyi YANG, Xiulong CHEN, Yan LIU

Journal Article

An investigation of reaction furnace temperatures and sulfur recovery

S. ASADI, M. PAKIZEH, M. POURAFSHARI CHENAR

Journal Article

Modelling and experimental verification on concrete-filled steel tubular columns with L or T section

LU Xilin, LI Xueping, WANG Dan

Journal Article

Data-driven soft sensors in blast furnace ironmaking: a survey

Yueyang LUO, Xinmin ZHANG, Manabu KANO, Long DENG, Chunjie YANG, Zhihuan SONG

Journal Article

Cyclic behavior of stiffened joints between concrete-filled steel tubular column and steel beam with

Chunyan QUAN,Wei WANG,Jian ZHOU,Rong WANG

Journal Article