Plasma-enhanced hydrolysis of urea and SCR of NO over V2O5-MoO3/TiO2: Decrease of reaction temperature and increase of NO conversion

Fuel ◽  
2020 ◽  
Vol 277 ◽  
pp. 118155 ◽  
Author(s):  
Xing Fan ◽  
Sijing Kang ◽  
Jian Li
Keyword(s):  
Reaction Temperature ◽  
No Conversion ◽  
Scr Of No ◽  
Hydrolysis Of ◽  
Hydrolysis Of Urea

Hydrogen Generation by Hydrolysis of the Ball Milled Al-C-KCl Composite Powder in Distilled Water

2012 ◽  
Vol 519 ◽  
pp. 87-91 ◽  
Author(s):  
Xia Ni Huang ◽  
Zhang Han Wu ◽  
Ke Cao ◽  
Wen Zeng ◽  
Chun Ju Lv ◽  
...  
Keyword(s):  
Particle Size ◽  
Reaction Temperature ◽  
Fine Particle ◽  
Composite Powder ◽  
Hydrogen Generation ◽  
Aluminum Particle ◽  
Generation Rate ◽  
Composite Powders ◽  
Fine Particle Size ◽  
Hydrolysis Of

In the present investigation, the Al-C-KCl composite powders were prepared by a ball milling processing in an attempt to improve the hydrogen evolution capacity of aluminum in water. The results showed that the hydrogen generation reaction is affected by KCl amount, preparation processing, initial aluminum particle size and reaction temperature. Increasing KCl amount led to an increased hydrogen generation volume. The use of aluminum powder with a fine particle size could promote the aluminum hydrolysis reaction and get an increased hydrogen generation rate. The reaction temperature played an important role in hydrogen generation rate and the maximum hydrogen generation rate of 44.8 cm3 min-1g-1of Al was obtained at 75oC. The XRD results identified that the hydrolysis byproducts are bayerite (Al(OH)3) and boehmite (AlOOH).

scholarly journals Discussion on the Scheme of Preparing Ammonia Gas by Hydrolysis of Urea

2019 ◽  
Vol 612 ◽  
pp. 042034
Author(s):  
Jingcheng Su ◽  
Fangming Xue ◽  
Feng Chen ◽  
Yiqing Sun ◽  
Xiuru Liu
Keyword(s):  
Ammonia Gas ◽  
Hydrolysis Of ◽  
Hydrolysis Of Urea

The differentiation of Trichophyton rubrum and T. mentagrophytes by use of Christensen's urea broth

1971 ◽  
Vol 17 (7) ◽  
pp. 911-913 ◽  
Author(s):  
Julius Kane ◽  
J. B. Fischer
Keyword(s):  
Urease Activity ◽  
Trichophyton Rubrum ◽  
Agar Medium ◽  
Phenol Red ◽  
Depressing Effect ◽  
Fluid Medium ◽  
Maximum Change ◽  
Pure Cultures ◽  
Hydrolysis Of ◽  
Hydrolysis Of Urea

A comparison of the urease activity of 56 strains of T. rubrum and 64 strains of T. mentagrophytes on Christensen's urea medium with and without agar incubated 7 days at 28 °C showed that characteristic and consistent results are produced on this medium without agar. In the fluid medium T. mentagrophytes caused a rise in pH, resulting in a maximum change of the phenol red, and T. rubrum produced no change. The depressing effect of agar on the hydrolysis of urea was demonstrated. On the agar medium 9 (18.8%) of 48 strains of T. mentagrophytes and 3 (6.2%) of 48 strains of T. rubrum produced doubtful results. It is important that pure cultures be used for the test.

scholarly journals Biodiesel Production Using Supercritical Methanol with Carbon Dioxide and Acetic Acid

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Chao-Yi Wei ◽  
Tzou-Chi Huang ◽  
Ho-Hsien Chen
Keyword(s):  
Carbon Dioxide ◽  
Acetic Acid ◽  
Reaction Temperature ◽  
Methyl Esters ◽  
Reaction Medium ◽  
International Standards ◽  
Biodiesel Production ◽  
Supercritical Methanol ◽  
Optimal Reaction Temperature ◽  
Hydrolysis Of

Transesterification of oils and lipids in supercritical methanol is commonly carried out in the absence of a catalyst. In this work, supercritical methanol, carbon dioxide, and acetic acid were used to produce biodiesel from soybean oil. Supercritical carbon dioxide was added to reduce the reaction temperature and increase the fats dissolved in the reaction medium. Acetic acid was added to reduce the glycerol byproduct and increase the hydrolysis of fatty acids. The Taguchi method was used to identify optimal conditions in the biodiesel production process. With an optimal reaction temperature of 280°C, a methanol-to-oil ratio of 60, and an acetic acid-to-oil ratio of 3, a 97.83% yield of fatty acid methyl esters (FAMEs) was observed after 90 min at a reaction pressure of 20 MPa. While the common approach to biodiesel production results in a glycerol byproduct of about 10% of the yield, the practices reported in this research can reduce the glycerol byproduct by 30.2% and thereby meet international standards requiring a FAME content of >96%.

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