scholarly journals Electropolishing valve metals with a sulfuric acid-methanol electrolyte at low temperature

2018 ◽  
Vol 347 ◽  
pp. 150-156 ◽  
Author(s):  
Pete Barnes ◽  
Andreas Savva ◽  
Kiev Dixon ◽  
Hailey Bull ◽  
Laura Rill ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Low Temperature ◽  
Valve Metals

scholarly journals COMPOSITION, STRUCTURE AND TEXTURAL CHARACTERISTICS OF DOMESTIC ACID ACTIVATED BENTONITE

2014 ◽  
Vol 5 (1) ◽  
Author(s):  
Zоrаn Pеtrоvić ◽  
Pеrо Dugić ◽  
Vојislаv Аlеksić ◽  
Sаbinа Bеgić ◽  
Vlаdаn Мićić ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Low Temperature ◽  
Layered Structure ◽  
Nitrogen Adsorption ◽  
X Ray Diffraction ◽  
Textural Characteristics ◽  
X Ray ◽  
Before And After ◽  
Activated Bentonite ◽  
Composition Structure

Bentonites are aluminosilicate minerals which, due to their porosity, layered structure and composition have a wide application. Structural and textural characteristics of bentonite may be improved by different modification procedures. The aim of this study was to investigate compositional, structural and textural characteristics of domestic bentonite in place Gerzovo, before and after the activation with sulfuric acid. These characteristics were investigated by analytical methods, X-ray diffraction (XRD) and the method of low-temperature nitrogen adsorption (BET). Characteristics of acid-activated bentonite were compared with the characteristics of commercial active clay. The obtained results showed that the activation of bentonite with sulfuric acid leads to a significant improvement in structural and textural characteristics. Using these results it can be assumed that this bentonite will have good adsorption characteristics and can serve as an alternative in comparison with imported commercial aluminosilicate-based adsorbents.

Coupled heating/acidification pretreatment of chemical sludge for dewatering by using waste sulfuric acid at low temperature

Chemosphere ◽  
2018 ◽  
Vol 205 ◽  
pp. 260-266 ◽  
Author(s):  
Bo Bian ◽  
Limin Zhang ◽  
Qin Zhang ◽  
Shaopeng Zhang ◽  
Zhen Yang ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Low Temperature ◽  
Chemical Sludge

A new steel with good low-temperature sulfuric acid dew point corrosion resistance

2011 ◽  
Vol 63 (7) ◽  
pp. 598-606 ◽  
Author(s):  
X. Q. Cheng ◽  
F. L. Sun ◽  
S. J. Lv ◽  
X. G. Li
Keyword(s):  
Corrosion Resistance ◽  
Sulfuric Acid ◽  
Low Temperature ◽  
Dew Point

Low-Temperature Pressure Leaching of Converter Matte in Sulfuric Acid Solutions

Metallurgist ◽  
2017 ◽  
Vol 61 (3-4) ◽  
pp. 238-242 ◽  
Author(s):  
K. A. Karimov ◽  
A. V. Kritskii ◽  
L. G. Elfimova ◽  
S. S. Naboichenko
Keyword(s):  
Sulfuric Acid ◽  
Low Temperature ◽  
Pressure Leaching ◽  
Acid Solutions ◽  
Converter Matte ◽  
Sulfuric Acid Solutions

Analysis of Single Factor on the Low Temperature Compressive Characteristics of Sulphate Saline Soil

2014 ◽  
Vol 501-504 ◽  
pp. 426-429
Author(s):  
Xin Hong Guo ◽  
Guang De Wu ◽  
Xin Huan Guo
Keyword(s):  
Sulfuric Acid ◽  
Low Temperature ◽  
Moisture Content ◽  
Saline Soil ◽  
Influencing Factor ◽  
Salt Content ◽  
Dry Density ◽  
Single Factor ◽  
Compression Coefficient ◽  
Soil Compression

According to the experiments study of sulfuric acid saline soil, the formula of compression coefficient with the changes of moisture content, salt content, initial dry density and temperature is presented, and the law of single influencing factor on sulfuric acid saline soil compression are analyzed in the paper.

Design and Cost of the Sulfuric Acid Decomposition Reactor for the Sulfur Based Hydrogen Processes

2008 ◽  
Author(s):  
Tzu-Yu Hu ◽  
Sarah M. Connolly ◽  
Edward J. Lahoda ◽  
Willem Kriel
Keyword(s):  
Sulfuric Acid ◽  
High Temperature ◽  
Low Temperature ◽  
Engineering Design ◽  
Coated Steel ◽  
Acid Decomposition ◽  
Chemical Systems ◽  
Reasonable Cost ◽  
Operating Lifetime ◽  
Sulfuric Acid Decomposition

The key interface component between the reactor and chemical systems for the sulfuric acid based processes to make hydrogen is the sulfuric acid decomposition reactor. The materials issues for the decomposition reactor are severe since sulfuric acid must be heated, vaporized and decomposed. SiC has been identified and proven by others to be an acceptable material. However, SiC has a significant design issue when it must be interfaced with metals for connection to the remainder of the process. Westinghouse has developed a design utilizing SiC for the high temperature portions of the reactor that are in contact with the sulfuric acid and polymeric coated steel for low temperature portions. This design is expected to have a reasonable cost for an operating lifetime of 20 years. It can be readily maintained in the field, and is transportable by truck (maximum OD is 4.5 meters). This paper summarizes the detailed engineering design of the Westinghouse Decomposition Reactor and the decomposition reactor’s capital cost.

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