Research on the Corrosive Factors of Q235 Steel in Simulate Ammonium Sulfate Solution of Ammonia Desulphurization

2014 ◽  
Vol 941-944 ◽  
pp. 165-168
Author(s):  
Lian He ◽  
Dong Sheng Chen ◽  
Fei Fei Lou ◽  
Qin Qin Ye ◽  
Wu Ji Wei ◽  
...  
Keyword(s):  
Corrosion Rate ◽  
Flow Velocity ◽  
Ammonium Sulfate ◽  
Steel Corrosion ◽  
Sulfate Solution ◽  
Ammonium Sulfate Solution ◽  
Q235 Steel ◽  
Electrode Processes ◽  
Maximum Value ◽  
Weight Loss Method

Corrosion behaviors of Q235 steel in simulate ammonium sulfate solution were studied. Effects of the ammonium sulfate concentration, Cl- concentration, pH and the flow velocity on corrosion of Q235 steel in simulate ammonium sulfate solution were investigated by the weight-loss method, and the electrode processes were studied by polarization curves. The result showed that: (1) the corrosion rate of Q235 steel increased with the increase of Cl- concentration firstly. When Cl- concentration was 10000ppm, the corrosion rate reached the maximum value of 6.698 mm/a, and then, with the increase of Cl- concentration, the corrosion rate decreased. (2)With pH increasing, the corrosion rate of Q235 steel decreased. (3)The corrosion rate increased with the increase of the concentration of ammonium sulfate firstly. When the concentration of ammonium sulfate was 5%, the corrosion rate reached the maximum value of 5.462 mm/a. And then the corrosion rate decreased. (4)The influence of the flow velocity on Q235 steel corrosion was remarkable, with the increase of the flow velocity, the corrosion rate increased rapidly.

Role of sodium citrate in leaching of low-grade and multiphase zinc oxide ore in ammonia–ammonium sulfate solution

2017 ◽  
Vol 169 ◽  
pp. 534-541 ◽  
Author(s):  
Kun Yang ◽  
Libo Zhang ◽  
Chao Lv ◽  
Jinhui Peng ◽  
Shiwei Li ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Ammonium Sulfate ◽  
Sodium Citrate ◽  
Sulfate Solution ◽  
Low Grade ◽  
Ammonium Sulfate Solution

Corrosion inhibition of organic amine on Q235 steel in ammonium sulfate slurry of ammonia flue gas desulfurization system

2017 ◽  
Vol 64 (4) ◽  
pp. 432-442
Author(s):  
Zhouyang Lian ◽  
Zhengwei Luo ◽  
Lirui Yuan ◽  
Mulin Guo ◽  
Wuji Wei ◽  
...  
Keyword(s):  
Ammonium Sulfate ◽  
Flue Gas ◽  
Inhibition Efficiency ◽  
Flue Gas Desulfurization ◽  
Protective Film ◽  
X Ray Diffraction ◽  
Content Type ◽  
X Ray ◽  
Q235 Steel ◽  
Maximum Value

Purpose This paper aims to evaluate diethylenetriamine (DETA) as an inhibitor on Q235 (Gr. D) steel in ammonia flue gas desulfurization (AFGD) system. Design/methodology/approach This research was carried out by weight loss, electrochemical measurements, scanning electron microscopy and X-ray photoelectron spectrometry. The effects of DETA on crystallization of ammonium sulfate and its co-crystallization were also investigated by X-ray diffraction and infrared spectroscopy. Findings The inhibition efficiency of DETA reached a maximum value of 98.96 per cent. DETA is postulated to adsorb on Q235 steel surface, resulting in the formation of a protective film by the accumulation of many flat particles, and the thickness of protective film is 8 μm. DETA had no effect on the crystallization of ammonium sulfate product. Originality/value DETA can be used in AFGD system as an inhibitor to protect the equipment well.

Research on Raman Spectral Characteristics and Mechanism of Ammonium Sulfate Solution

2014 ◽  
Vol 34 (3) ◽  
pp. 0330004
Author(s):  
孙松 Sun Song ◽  
蔡廷栋 Cai Tingdong ◽  
刘莹 Liu Ying ◽  
王静静 Wang Jingjing ◽  
叶勇 Ye Yong ◽  
...  
Keyword(s):  
Ammonium Sulfate ◽  
Spectral Characteristics ◽  
Sulfate Solution ◽  
Ammonium Sulfate Solution ◽  
Raman Spectral

Amniotic fluid phosphatidylglycerol and phosphatidylinositol separated by stepwise-development thin-layer chromatography.

1980 ◽  
Vol 26 (2) ◽  
pp. 277-281
Author(s):  
M Mitnick ◽  
B DeMarco ◽  
J M Gibbons
Keyword(s):  
Thin Layer ◽  
Amniotic Fluid ◽  
Thin Layer Chromatography ◽  
Ammonium Sulfate ◽  
Sulfate Solution ◽  
Chromatographic Technique ◽  
Ammonium Sulfate Solution ◽  
Stepwise Development ◽  
Layer Chromatography ◽  
Phosphorus Determination

Abstract We describe a stepwise-development thin-layer-chromatographic technique for separating phosphatidylglycerol and phosphatidylinositol in samples of amniotic fluid. Plates are prepared from silica gel G slurried in a 50 g/L ammonium sulfate solution. Phospholipid phosphorus determination is not needed. Phospholipid phosphorus determination is not needed. Phosphatidylglycerol and phosphatidylinositol, measured densitometrically, are expressed as ratios to the sphingomyelin present. These ratios are correlated with the lecithin/sphingomyelin ratio and age of gestation in normal and abnormal pregnancies.

scholarly journals The Novel Strategy for Increasing the Efficiency and Yield of the Bipolar Membrane Electrodialysis by the Double Conjugate Salts Stress

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 343 ◽  
Author(s):  
Dong Wang ◽  
Wenqiao Meng ◽  
Yunna Lei ◽  
Chunxu Li ◽  
Jiaji Cheng ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Cation Exchange ◽  
Ammonium Sulfate ◽  
Sodium Sulfate ◽  
Sulfate Solution ◽  
Anion Exchange Membrane ◽  
Ammonium Sulfate Solution ◽  
Bipolar Membrane ◽  
Bipolar Membrane Electrodialysis ◽  
Exchange Membrane

To improve sulfuric acid recovery from sodium sulfate wastewater, a lab-scale bipolar membrane electrodialysis (BMED) process was used for the treatment of simulated sodium sulfate wastewater. In order to increase the concentration of sulfuric acid (H2SO4) generated during the process, a certain concentration of ammonium sulfate solution was added into the feed compartment. To study the influencing factors of sulfuric acid yield, we prepared different concentrations of ammonium sulfate solution, different feed solution volumes, and different membrane configurations in this experiment. As it can be seen from the results, when adding 8% (NH4)2SO4 into 15% Na2SO4 under the experimental conditions where the current density was 50 mA/cm2, the concentration of H2SO4 increased from 0.89 to 1.215 mol/L, and the current efficiency and energy consumption could be up to 60.12% and 2.59 kWh/kg, respectively. Furthermore, with the increase of the volume of the feed compartment, the concentration of H2SO4 also increased. At the same time, the configuration also affects the final concentration of the sulfuric acid; in the BP-A-C-BP (“BP” means bipolar membrane, “A” means anion exchange membrane, and “C” means cation exchange membrane; “BP-A-C-BP” means that two bipolar membranes, an anion exchange membrane, and a cation exchange membrane are alternately arranged to form a repeating unit of the membrane stack) configuration, a higher H2SO4 concentration was generated and less energy was consumed. The results show that the addition of the double conjugate salt is an effective method to increase the concentration of acid produced in the BMED process.

scholarly journals Recalibration of the Gilford Absorbance Indicator

1967 ◽  
Vol 13 (5) ◽  
pp. 423-425
Author(s):  
H Bruce Collier
Keyword(s):  
Ammonium Sulfate ◽  
Sulfate Solution ◽  
Potassium Chromate ◽  
Ammonium Sulfate Solution ◽  
Blue Glass ◽  
Cobalt Blue

Abstract The Gilford Absorbance Indicator was recalibrated, for absolute absorbance readings, with (1) a U. S. Bureau of Standards calibrated cobalt-blue glass standard; (2) a standard cobalt ammonium sulfate solution at 512 mµ (3) standard potassium chromate solutions at 373 mµ These three standards agreed with 1%. Readings on the indicator's absorbance scale had decreased by about 7% over 2 years.

Corrosion mechanism of copper immersed in ammonium sulfate solution

2018 ◽  
Vol 69 (11) ◽  
pp. 1597-1608 ◽  
Author(s):  
Kun Li ◽  
Zhuoyuan Chen ◽  
Jiarun Li ◽  
Xiaoying Sun ◽  
Fengling Xu ◽  
...  
Keyword(s):  
Ammonium Sulfate ◽  
Sulfate Solution ◽  
Corrosion Mechanism ◽  
Ammonium Sulfate Solution
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