Effect of Potassium Sodium Tartrate and Sodium Citrate on the Preparation of α-Calcium Sulfate Hemihydrate from Flue Gas Desulfurization Gypsum in a Concentrated Electrolyte Solution

2009 ◽  
Vol 92 (12) ◽  
pp. 2894-2899 ◽  
Author(s):  
Zhuoxian Shen ◽  
Baohong Guan ◽  
Hailu Fu ◽  
Liuchun Yang
Keyword(s):  
Electrolyte Solution ◽  
Flue Gas ◽  
Calcium Sulfate ◽  
Sodium Citrate ◽  
Flue Gas Desulfurization ◽  
Sodium Tartrate ◽  
Potassium Sodium ◽  
Potassium Sodium Tartrate ◽  
Calcium Sulfate Hemihydrate

scholarly journals Calcium Sulfate Hemihydrate Whiskers Obtained from Flue Gas Desulfurization Gypsum and Used for the Adsorption Removal of Lead

Crystals ◽  
2017 ◽  
Vol 7 (9) ◽  
pp. 270 ◽  
Author(s):  
Xiaoshu Wang ◽  
Lei Wang ◽  
Yan Wang ◽  
Ruiqi Tan ◽  
Xing Ke ◽  
...  
Keyword(s):  
Flue Gas ◽  
Calcium Sulfate ◽  
Flue Gas Desulfurization ◽  
Adsorption Removal ◽  
Calcium Sulfate Hemihydrate

The Effect of the C4O6H4KNa Concentration on the MAO Coating of the Mg-Sr-Al-Y Alloy

2013 ◽  
Vol 803 ◽  
pp. 187-190
Author(s):  
Yun Long Zhang ◽  
Yu Min Zhang ◽  
Mu Qin Li ◽  
Ming Hu
Keyword(s):  
Corrosion Resistance ◽  
Sodium Citrate ◽  
Matrix Alloy ◽  
Corrosion Current ◽  
Sodium Tartrate ◽  
Potassium Sodium ◽  
Polarization Behavior ◽  
Micro Arc Oxidation ◽  
Oxidation Technology ◽  
Potassium Sodium Tartrate

In order to resolve the corrosion resistance of the Mg-Sr-Al-Y alloy, the micro arc oxidation technology were utilized to fabricated the oxidation coating in this paper. The potassium sodium tartrate (C4O6H4KNa) solution was introduced into the electrolyte solution for improving the coating properties. The effect of the C4O6H4KNa content on the phase composition, surface morphology and potentiodynamic polarization behavior was investigated. Compared with the Mg-Sr-Al-Y matrix alloy, the specimen with sodium citrate had high relatively positive potential and low corrosion current , so it proved that the introduce of the doped C4O6H4KNa would improved the corrosion resistance properties. Key words: Micro arc oxidation, Potassium sodium tartrate (C4O6H4KNa), Polarization behavior, Corrosion resistance properties.

Study on the Application of Desulfurization Gypsum for the Gypsum Fiber Board Production

2013 ◽  
Vol 357-360 ◽  
pp. 646-650
Author(s):  
Chao Fa Tang ◽  
Chang Wen Cai ◽  
Bo Xu ◽  
Yan Long Liu
Keyword(s):  
Bond Strength ◽  
Flue Gas ◽  
Natural Environment ◽  
Internal Bond ◽  
Calcium Sulfate ◽  
Bending Strength ◽  
Wood Fiber ◽  
Green Building ◽  
Flue Gas Desulfurization ◽  
Calcium Sulfate Hemihydrate

Through semidry process, the wood fiber as reinforced materials and the industrial flue gas desulfurization waste calcinated calcium sulfate hemihydrate as an inorganic adhesive produced the environmental gypsum fiber board. This process is effective on utilization of desulfurization gypsum, which reduced the pollution of the environment and the demand of the natural gypsum, further to protect the natural environment. As green building decoration materials, gypsum fiber board has good prospects for development. The research results show that it is remarkable that the amount of the composite retarder is effective on the static bending strength, internal bond strength, grip screws to impact; the ratio of the wood and plaster is effective on the absorbent thickness expansion rate.

Kinetic model for calcium sulfate α-hemihydrate produced hydrothermally from gypsum formed by flue gas desulfurization

2015 ◽  
Vol 48 (3) ◽  
pp. 827-835 ◽  
Author(s):  
Mingliang Tang ◽  
Xuerun Li ◽  
Yusheng Shen ◽  
Xiaodong Shen
Keyword(s):  
Flue Gas ◽  
Calcium Sulfate ◽  
High Performance ◽  
Transformation Process ◽  
Flue Gas Desulfurization ◽  
Synthesis Process ◽  
Stable Phase ◽  
Hydrothermal Conditions ◽  
Simple Method ◽  
Kinetics Of

Modeling of the kinetics of the synthesis process for calcium sulfate α-hemihydrate from gypsum formed by flue gas desulfurization (FGD) is important to produce high-performance products with minimal costs and production cycles under hydrothermal conditions. In this study, a model was established by horizontally translating the obtained crystal size distribution (CSD) to the CSD of the stable phase during the transformation process. A simple method was used to obtain the nucleation and growth rates. A nonlinear optimization algorithm method was employed to determine the kinetic parameters. The model can be successfully used to analyze the transformation kinetics of FGD gypsum to α-hemihydrate in an isothermal batch crystallizer. The results showed that the transformation temperature and stirring speed exhibit a significant influence on the crystal growth and nucleation rates of α-hemihydrate, thus altering the transformation time and CSD of the final products. The characteristics obtained by the proposed model can potentially be used in the production of α-hemihydrate.

scholarly journals The Corrosion Inhibition Performance of Polyacrylic Acid with Potassium Sodium Tartrate and Zn2+ for Corrosion Control of Mild Steel in Aqueous Solution

2015 ◽  
Vol 61 ◽  
pp. 137-148 ◽  
Author(s):  
V. Dharmalingam ◽  
P. Arockia Sahayaraj ◽  
A. John Amalraj ◽  
R. Shobana ◽  
R. Mohan
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibition ◽  
Polyacrylic Acid ◽  
Potentiodynamic Polarization ◽  
Electrochemical Impedance ◽  
Aqueous Environment ◽  
Protective Film ◽  
Sodium Tartrate ◽  
Potassium Sodium ◽  
Potassium Sodium Tartrate

The goal of studying corrosion process is to find means of minimizing corrosion or prevent it from occurring. The use of inhibitors is one of the most popular methods for corrosion protection. A protective film has been formed on the surface of the mild steel in a neutral aqueous environment using a synergistic mixture of an eco-friendly inhibitor viz., Potassium Sodium Tartrate (SPT) along with polyacrylic acid (PAA) and Zn2+ ions. The inhibiting effect of SPT, PAA and Zn2+ ions have been investigated by gravimetric studies, Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The investigations revealed that SPT acts as an excellent synergist in corrosion inhibition. Optimum concentrations of all the three components of the ternary formulation are established by gravimetric studies. Potentiodynamic polarization studies inferred that this mixture functions as a cathodic inhibitor. EIS studies of the metal/solution interface indicated that the surface film is highly protective against the corrosion of mild steel. Surface characterization techniques (FTIR, SEM, AFM) are also used to ascertain the nature of the protective film. The mechanical aspect of corrosion inhibition is proposed.

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