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The Development of World Tantalum Powder Technology

He Jilin

Strategic Study of CAE 2001, Volume 3, Issue 12,   Pages 85-89

Abstract:

This article introduces the technology development of capacitor grade tantalum powders including high voltage tantalum powders, medium voltage tantalum powders and high specific capacitance tantalum powders. Many tantalum powder producers have invented new processes and technology to increase specific capacitance, reducing impurity content and improve the physical properties of tantalum powder so as to meet the requirement of capacitor manufacturing.

Keywords： tantalum powder     tantalum capacitor     specific capacitance     sodium reduction of potassium fluotantalate    

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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: Mortar sorptivity decreased with age and sodium hydroxide concentrations, suggesting the production ofNo reduction in weight of sample occurred after immersion in the strong acid H2SO4

Keywords： alkali-activated materials     fly ash     sorptivity     durability of concrete     sodium hydroxide     sodium silicates     reduction in CO2 emissions     sulfuric acid    

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Effect of potassium carbonate on catalytic synthesis of calcium carbide at moderate temperature

Dejun SHI, Ke QIAO, Zifeng YAN

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 3,   Pages 372-375 doi: 10.1007/s11705-010-0570-1

Abstract: Calcium carbide was successfully synthesized by carbothermal reduction of lime with coke at 1973 K forAddition of potassium carbonate increased the yield of calcium carbide.The sample in the presence of potassium carbonate generated acetylene gas of 168.3 L/kg, which was 10%higher than that in the absence of potassium carbonate.A possible mechanism of the above effects was that the additive, which was melted at the reduction temperature

Keywords： calcium carbide     synthesis     catalysis    

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Influences of additives on the crystal habit of potassium chloride

Xiaofu GUO, Junsheng YUAN, Zhiyong JI, Min SU,

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 1,   Pages 78-81 doi: 10.1007/s11705-009-0300-8

Abstract: cooling crystallization, the influences of four additives, including lead chloride, cadmium chloride, sodiumKCl is strip in the presence of Cd, and the crystal habit of KCl is cavate cube in the presence of sodium

Keywords： cadmium chloride     salicylate     presence     crystallization     diffractometry analysis    

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Experimental study on high-efficiency polishing for potassium dihydrogen phosphate (KDP) crystal by using

Ziyuan LIU, Hang GAO, Dongming GUO

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 2,   Pages 294-302 doi: 10.1007/s11465-019-0576-4

Abstract: surface contamination and solve the inefficiency of previous water-dissolution polishing techniques for potassium

Keywords： potassium dihydrogen phosphate (KDP) crystal     controllable deliquescence     two-phase air–water fluid     high-efficiency    

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Alumina modified sodium vanadate cathode for aqueous zinc-ion batteries

Frontiers in Energy   Pages 775-781 doi: 10.1007/s11708-023-0902-8

Abstract: Therefore, sodium vanadate Na2V6O16·3H2O (NVO) was chosen

Keywords： cathodes     aqueous zinc-ion batteries     sodium vanadate     alumina     coating    

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Construction of sustainable, colored and multifunctional protein silk fabric using biomass riboflavin sodium

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 8,   Pages 1131-1139 doi: 10.1007/s11705-023-2321-0

Abstract: Riboflavin sodium phosphate has been confirmed as a promising biomass product derived from natural plantsnovel method of dyeing and multifunctional modification of silk fabric by impregnation with riboflavin sodiumThe results of this paper confirmed that the pH and concentration of riboflavin sodium phosphate solutionThe damaged length of modified silk fabric with 40% owf riboflavin sodium phosphate was lower than 10.4As revealed by the result of this paper, riboflavin sodium phosphate is sufficiently effective in serving

Keywords： biomass     riboflavin sodium phosphate     silk protein     multifunctional modification     flame retardant    

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A space power system of free piston Stirling generator based on potassium heat pipe

Mingqiang LIN, Jian MOU, Chunyun CHI, Guotong HONG, Panhe GE, Gu HU

Frontiers in Energy 2020, Volume 14, Issue 1,   Pages 1-10 doi: 10.1007/s11708-019-0655-6

Abstract: The power system of a free piston Stirling generator (FPSG) based on potassium heat pipes has been developedBesides, the power system integrated with four FPSGs and potassium heat pipes was performed and the single

Keywords： free piston Stirling generator (FPSG)     potassium heat pipe     power system     energy conversion    

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Effect of adding a smart potassium ion-responsive copolymer into polysulfone support membrane on the

Meibo He, Zhuang Liu, Tong Li, Chen Chen, Baicang Liu, John C. Crittenden

Frontiers of Chemical Science and Engineering 2019, Volume 13, Issue 2,   Pages 400-414 doi: 10.1007/s11705-018-1757-0

Abstract: Thin-film composite (TFC) nanofiltration (NF) membranes were fabricated via the interfacial polymerization of piperazine (PIP) and 1,3,5-benzenetricarbonyl trichloride on polysulfone (PSf) support membranes blended with K -responsive poly( -isopropylacryamide-co-acryloylamidobenzo-15-crown-5) (P(NIPAM-co-AAB C )). Membranes were characterized by attenuated total reflection Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, atomic force microscope, scanning electron microscope, contact angle, and filtration tests. The results showed that: (1) Under K -free conditions, the blended P(NIPAM-co-AAB C )/PSf supports had porous and hydrophilic surfaces, thereby producing NF membranes with smooth surfaces and low MgSO rejections; (2) With K in the PIP solution, the surface roughness and water permeability of the resultant NF membrane were increased due to the K -induced transition of low-content P(NIPAM-co-AAB C ) from hydrophilic to hydrophobic; (3) After a curing treatment at 95 °C, the improved NF membrane achieved an even higher pure water permeability of 10.97 L·m ·h ·bar under 200 psi. Overall, this study provides a novel method to improve the performance of NF membranes and helps understand the influence of supports on TFC membranes.

Keywords： nanofiltration     interfacial polymerization     support membrane     potassium ion-responsive     thin-film composite    

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Preliminary design of an SCO conversion system applied to the sodium cooled fast reactor

Frontiers in Energy 2021, Volume 15, Issue 4,   Pages 832-841 doi: 10.1007/s11708-021-0777-5

Abstract: supercritical carbon dioxide (SCO2) Brayton cycle has become an ideal power conversion system for sodium-cooledfast reactors (SFR) due to its high efficiency, compactness, and avoidance of sodium-water reaction.the 1200 MWe large pool SFR (CFR1200) is used as the heat source of the system, and the sodiumflowrate in the SCO2 power conversion system is adjusted with the goal of maintaining the sodium-carbondioxide heat exchanger sodium side outlet temperature unchanged, the inter-stage cooling recompression

Keywords： sodium-cooled fast reactor (SFR)     supercritical carbon dioxide (SCO2)     brayton cycle     load    

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Toxic effect of sodium perfluorononyloxy-benzenesulfonate on in aerobic denitrification, cell structure

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 5, doi: 10.1007/s11783-021-1391-9

Abstract:

• OBS inhibited the growth of P. stutzeri and destroyed its structure.

Keywords： Sodium perfluorononyloxy-benzenesulfonate     Aerobic denitrification     Pseudomonas stutzeri     Ecotoxicity    

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Preparation and gaseous photocatalytic activity of smooth potassium dititanate film

QIAN Qinghua, HU Yuyan, WEN Gaofei, FENG Xin, LU Xiao-hua

Frontiers of Chemical Science and Engineering 2008, Volume 2, Issue 3,   Pages 308-314 doi: 10.1007/s11705-008-0047-7

Abstract: A new smooth potassium dititanate film was prepared by sol-gel method and characterized by thermogravimetry

Keywords： reflectance     UV-Visible     photocurrent     irradiation     scanning calorimetry    

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Formation of disinfection by-products during sodium hypochlorite cleaning of fouled membranes from membrane

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 5, doi: 10.1007/s11783-021-1389-3

Abstract:

•HAAs was dominant among the DBPs of interest.

Keywords： MBR     Biofouling     EPS     Chemical cleaning     DBPs     CLSM    

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Industrial waste utilization method: producing poly-ferric sulfate (PFS) from sodium-jarosite residue

Zhongguo LI,Wenyi YUAN

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 4,   Pages 731-737 doi: 10.1007/s11783-014-0687-4

Abstract: Sodium-jarosite is a type of industrial waste that results from hydrometallurgy and inorganic chemicalThis paper proposes a novel method for disposing sodium-jarosite which can be used to synthesize PFS,concentrated sulfuric acid consumption was 0.8 mL·g sodium-jarosite and the leaching temperature wasIn the experiment, decomposing iron from sulfate sodium-jarosite can take the place of ferric martialsResults show that the PFS synthesized from sodium-jarosite had a high poly-iron complex Fe (SO ) (OH)

Keywords： sodium-jarosite residue     utilization     poly-ferric sulfate (PFS)    

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Effect of sodium ions in synthesis of titanium silicalite-1 on its catalytic performance for cyclohexanone

Pengxu YAO,Yaquan WANG,Teng ZHANG,Shuhai WANG,Xiaoxue WU

Frontiers of Chemical Science and Engineering 2014, Volume 8, Issue 2,   Pages 149-155 doi: 10.1007/s11705-014-1409-y

Abstract: Titanium silicalite-1 (TS-1) has been hydrothermally synthesized with tetrapropylammonium hydroxide (TPAOH) as the template in the presence of various amounts of Na , characterized by inductively coupled plasma, X-ray diffraction, scanning electron microscope, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy and ultro-violet-visible spectroscopy and studied in cyclohexanone ammoximation. The characterization results show that with the increase of Na concentration in the synthesis, both the crystal sizes of TS-1and extra framework Ti increase but framework Ti decreases. The addition of Na below 3 mol-% of TPAOH in the synthesis does not influence the catalytic properties with above 98% conversion of cyclohexanone and 99.5% selectivity to cyclohexanone oxime. However, at the concentrations of Na ≥3 mol-% of TPAOH in the synthesis, the catalysts are deactivated faster with the increase of Na addition, which can be attributed to more high molecular weight byproducts deposited in the large TS-1 particles and the loss of the frame-work titanium. The results of this work are of great importance for the industry.

Keywords： extra framework Ti     cyclohexanone ammoximation     titanium silicalite-1     sodium ion     crystal size    

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Title Author Date Type Operation

The Development of World Tantalum Powder Technology

He Jilin

Journal Article

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

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

Journal Article

Effect of potassium carbonate on catalytic synthesis of calcium carbide at moderate temperature

Dejun SHI, Ke QIAO, Zifeng YAN

Journal Article

Influences of additives on the crystal habit of potassium chloride

Xiaofu GUO, Junsheng YUAN, Zhiyong JI, Min SU,

Journal Article

Experimental study on high-efficiency polishing for potassium dihydrogen phosphate (KDP) crystal by using

Ziyuan LIU, Hang GAO, Dongming GUO

Journal Article

Alumina modified sodium vanadate cathode for aqueous zinc-ion batteries

Journal Article

Construction of sustainable, colored and multifunctional protein silk fabric using biomass riboflavin sodium

Journal Article

A space power system of free piston Stirling generator based on potassium heat pipe

Mingqiang LIN, Jian MOU, Chunyun CHI, Guotong HONG, Panhe GE, Gu HU

Journal Article

Effect of adding a smart potassium ion-responsive copolymer into polysulfone support membrane on the

Meibo He, Zhuang Liu, Tong Li, Chen Chen, Baicang Liu, John C. Crittenden

Journal Article

Preliminary design of an SCO conversion system applied to the sodium cooled fast reactor

Journal Article

Toxic effect of sodium perfluorononyloxy-benzenesulfonate on in aerobic denitrification, cell structure

Journal Article

Preparation and gaseous photocatalytic activity of smooth potassium dititanate film

QIAN Qinghua, HU Yuyan, WEN Gaofei, FENG Xin, LU Xiao-hua

Journal Article

Formation of disinfection by-products during sodium hypochlorite cleaning of fouled membranes from membrane

Journal Article

Industrial waste utilization method: producing poly-ferric sulfate (PFS) from sodium-jarosite residue

Zhongguo LI,Wenyi YUAN

Journal Article

Effect of sodium ions in synthesis of titanium silicalite-1 on its catalytic performance for cyclohexanone

Pengxu YAO,Yaquan WANG,Teng ZHANG,Shuhai WANG,Xiaoxue WU

Journal Article