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Removal of elemental mercury by KI-impregnated clay

Boxiong SHEN,Jianhong CHEN,Ji CAI

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 2,   Pages 236-243 doi: 10.1007/s11783-014-0765-7

Abstract: This study described the use of clay impregnated by KI in gas phase elemental mercury (Hg ) removal in flue gas. The effects of KI loading, temperature, O , SO and H O on Hg removal were investigated using a fixed bed reactor. The Hg removal efficiency of KI-clay with 3% KI loading could maintain at a high level (approximately 80 %) after 3 h. The KI-clay demonstrated to be a potential adsorbent for Hg removal when compared with activated carbon based adsorbent. O was found to be an important factor in improving the Hg removal. O was demonstrated to assist the transfer of KI to I on the surface of KI-clay, which could react with Hg directly. NO and SO could slightly improve Hg removal, while H O inhibited it greatly. The results indicated that after adsorption, most of the mercury escaped from the surface again. Some of the mercury may have been oxidized as it left the surface. The results demonstrated that the chemical reaction primarily occurred between KI and mercury on the surface of the KI-clay.

Keywords： clay     elemental mercury     removal efficiency     potassium iodide     mechanism    

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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: The effect of potassium carbonate as additive on the composition and morphology of the product was investigatedAddition 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.This result confirmed the catalytic effect of potassium carbonate on the synthesis of calcium carbide

Keywords： calcium carbide     synthesis     catalysis    

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Toward better understanding vacuum ultraviolet–iodide induced photolysis via hydrogen peroxide formation

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 5, doi: 10.1007/s11783-021-1489-0

Abstract:

• UV/VUV/I– induces substantial H2O2 and IO3– formation, but UV/I– does not.

Keywords： Vacuum ultraviolet     Hydrogen peroxide     Iodate     Hydroxyl radical     Redox transition    

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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: By means of constant control speed cooling crystallization, the influences of four additives, including lead chloride, cadmium chloride, sodium salicylate, and quaternary ammonium salt, on the crystal habit of KCl were investigated. The results show that the crystal habit of KCl is cube without additives, the crystal habit of KCl is ellipsoid-like in the presence of Pb, the crystal habit of KCl is strip in the presence of Cd, and the crystal habit of KCl is cavate cube in the presence of sodium salicylate. X-ray diffractometry analysis reveals that these additives can change the crystal habit of KCl but not its crystal structure.

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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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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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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Kinetics of oxidation of dimethyl trisulfide by potassium permanganate in drinking water

Xiaoyan MA, Shifei HU, Hongyu WANG, Jun LI, Jing HUANG, Yun ZHANG, Weigang LU, Qingsong LI

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 2,   Pages 171-176 doi: 10.1007/s11783-011-0319-1

Abstract: Reaction kinetics of dimethyl trisulfide oxidized by potassium permanganate in water had been studiedResults showed that dimethyl trisulfide can be removed by potassium permanganate efficiently; the ratio

Keywords： odor and taste     oxidation reaction     reaction kinetics     water treatment    

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Green process to recover magnesium chloride from residue solution of potassium chloride production plant

WANG Lin, HE Yunliang, WANG Yanfei, BAO Ying, WANG Jingkang

Frontiers of Chemical Science and Engineering 2008, Volume 2, Issue 4,   Pages 385-389 doi: 10.1007/s11705-008-0079-z

Abstract: The green process to recover magnesium chloride from the residue solution of a potassium chloride productionThe residue solution contains magnesium chloride above 25 wt-%, potassium chloride and sodium chlorideThe crystallized impurity carnallite obtained from the first step is recycled to the potassium chlorideplant to recover the potassium salt.

Keywords： industrial production     chemical industrial     produced magnesium     chloride production     impurity carnallite    

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Kinetic-compartmental modelling of potassium-containing cellulose feedstock gasification

Attila Egedy, Lívia Gyurik, Tamás Varga, Jun Zou, Norbert Miskolczi, Haiping Yang

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 4,   Pages 708-717 doi: 10.1007/s11705-018-1767-y

Abstract:

Biomass is of growing interest as a secondary energy source and can be converted to fuels with higher energy density especially by pyrolysis or gasification. Understanding the mechanism and the kinetics of biomass pyrolysis (thermal decomposition) and gasification (conversion of organic material to gases) could be the key to the design of industrial devices capable of processing vast amounts of biomass feedstock. In our work real product components obtained in pyrolysis were took into consideration as well as char and oil as lumped components, and the kinetic constants for a biomass model compound (cellulose) pyrolysis and gasification were identified based on a proposed simplified reaction mechanism within a compartment model structure. A laboratory scale reactor was used for the physical experiments containing consecutive fast pyrolysis and gasification stages using alkali metal (K) containing feedstock, which has a significant effect on the cellulose pyrolysis and gasification. The detailed model was implemented in MATLAB/Simulink environment, and the unknown kinetic parameters were identified based on experimental data. The model was validated based on measurement data, and a good agreement was found. Based on the validated first principle model the optimal parameters were determined as 0.15 mL/min steam flow rate, and 4% K content.

Keywords： biomass pyrolysis     kinetic parameter identification     compartment modelling     optimisation    

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Application of seismic exploration method in East Sichuan deep-seated potassium-rich brine exploration

Yan Jianguo,Hou Lei,Zhao Yuhong,Yang Xiaoyu

Strategic Study of CAE 2013, Volume 15, Issue 10,   Pages 59-65

Abstract: This paper mainly expounds the technical ideas in oil and gas exploration, combined with rich potassiumbrine of the seismic response characteristics, determine the formation of deep rich potassium brineThe practical application in a rich brine potassium of the eastern Sichuan Basin shows that the seismicprospecting method can better delineation of potassium rich brine reservoir, and then put forward exploration

Keywords： seismic exploration     rich potassium brine     fracture     layer flattening     Sichuan Basin    

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a novel K+ transporter gene in cotton

Yiru WANG, Juan XU, Mingcai ZHANG, Xiaoli TIAN, Zhaohu LI

Frontiers of Agricultural Science and Engineering 2018, Volume 5, Issue 2,   Pages 226-235 doi: 10.15302/J-FASE-2017170

Abstract: Potassium is an essential nutrient for plant growth and productivity of crops.

Keywords： cotton     GhKT2     potassium     transporter     uptake    

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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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Genetic variants in the ADD1 and GNB3 genes and blood pressure response to potassium supplementation

Dai-Hai YU PhD, Jian-Feng HUANG MD, Ji-Chun CHEN MS, Jie CAO MS, Shu-Feng CHEN PhD, Dong-Feng GU MD, PhD, for the GenSalt Collaborative Research Group, De-Pei LIU PhD, Lai-Yuan WANG PhD, Jing CHEN MD, MSc, Jiang HE MD, PhD, Cashell E. JAQUISH PhD, Dabeeru C. RAO PhD, Charles GU PhD, James E. HIXSON PhD, Chung-Shiuan CHEN MS8, Paul K. WHELTON MD, MSc9,

Frontiers of Medicine 2010, Volume 4, Issue 1,   Pages 59-66 doi: 10.1007/s11684-010-0015-8

Abstract: Dietary potassium-supplementation has been associated with a decreased risk of hypertension and otherHowever, blood pressure (BP) responses to potassium supplementation vary among individuals.GNB3) genes and systolic BP (SBP), diastolic BP (DBP), and mean arterial pressure (MAP) responses to potassium-supplementation(60 mmol potassium/day) among 1906 Han Chinese participants from rural north China.DBP and MAP responses to potassium-supplementation were −1.36 (−1.63, −1.10) and −

Keywords： blood pressure     genetics     polymorphism     die-tary potassium     potassium sensitivity     adducin 1 alpha (ADD1)    

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Title Author Date Type Operation

Removal of elemental mercury by KI-impregnated clay

Boxiong SHEN,Jianhong CHEN,Ji CAI

Journal Article

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

Dejun SHI, Ke QIAO, Zifeng YAN

Journal Article

Toward better understanding vacuum ultraviolet–iodide induced photolysis via hydrogen peroxide formation

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

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

Preparation and gaseous photocatalytic activity of smooth potassium dititanate film

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

Journal Article

Kinetics of oxidation of dimethyl trisulfide by potassium permanganate in drinking water

Xiaoyan MA, Shifei HU, Hongyu WANG, Jun LI, Jing HUANG, Yun ZHANG, Weigang LU, Qingsong LI

Journal Article

Green process to recover magnesium chloride from residue solution of potassium chloride production plant

WANG Lin, HE Yunliang, WANG Yanfei, BAO Ying, WANG Jingkang

Journal Article

Kinetic-compartmental modelling of potassium-containing cellulose feedstock gasification

Attila Egedy, Lívia Gyurik, Tamás Varga, Jun Zou, Norbert Miskolczi, Haiping Yang

Journal Article

Application of seismic exploration method in East Sichuan deep-seated potassium-rich brine exploration

Yan Jianguo,Hou Lei,Zhao Yuhong,Yang Xiaoyu

Journal Article

a novel K+ transporter gene in cotton

Yiru WANG, Juan XU, Mingcai ZHANG, Xiaoli TIAN, Zhaohu LI

Journal Article

The Development of World Tantalum Powder Technology

He Jilin

Journal Article

Genetic variants in the ADD1 and GNB3 genes and blood pressure response to potassium supplementation

Dai-Hai YU PhD, Jian-Feng HUANG MD, Ji-Chun CHEN MS, Jie CAO MS, Shu-Feng CHEN PhD, Dong-Feng GU MD, PhD, for the GenSalt Collaborative Research Group, De-Pei LIU PhD, Lai-Yuan WANG PhD, Jing CHEN MD, MSc, Jiang HE MD, PhD, Cashell E. JAQUISH PhD, Dabeeru C. RAO PhD, Charles GU PhD, James E. HIXSON PhD, Chung-Shiuan CHEN MS8, Paul K. WHELTON MD, MSc9,

Journal Article