Results 11 to 20 of about 5,782,140 (394)

Revised treatment of wet scavenging processes dramatically improves GEOS-Chem 12.0.0 simulations of surface nitric acid, nitrate, and ammonium over the United States [PDF]

open access: yesGeoscientific Model Development, 2019
The widely used community model GEOS-Chem 12.0.0 and previous versions have been recognized to significantly overestimate the concentrations of gaseous nitric acid, aerosol nitrate, and aerosol ammonium over the United States.
G. Luo, F. Yu, J. Schwab
doaj   +2 more sources

Nucleation of nitric acid hydrates in polar stratospheric clouds by meteoric material [PDF]

open access: yesAtmospheric Chemistry and Physics, 2018
Heterogeneous nucleation of crystalline nitric acid hydrates in polar stratospheric clouds (PSCs) enhances ozone depletion. However, the identity and mode of action of the particles responsible for nucleation remains unknown.
A. D. James   +5 more
doaj   +2 more sources

Thermal-hydraulic characteristics of nitric acid: An experimental and numerical analysis [PDF]

open access: yesHeliyon
Nitric acid is one of the most important products in the chemical industry, ranking third globally in terms of acid production. Although nitric acid has many industrial applications, its primary function is the production of ammonium nitrate, which is ...
Meshal F. Alhasan   +5 more
doaj   +2 more sources

Extraction and Chemical Characterization of Humic Acid from Nitric Acid Treated Lignite and Bituminous Coal Samples

open access: yesSustainability, 2021
Currently, conversion of coal into alternative fuel and non-fuel valuable products is in demand and growing interest. In the present study, humic acid was extracted from two different ranks of coal, i.e., low rank and high rank (lignite and bituminous ...
Noureen Fatima   +13 more
semanticscholar   +1 more source

Electrochemical Behavior of ReO-4 in Sulfuric Acid and Nitric Acid Media

open access: yesHe huaxue yu fangshe huaxue, 2022
99Tc is one of the main fission products in nuclear spent fuel in power reactor. Its half-life period is 2.13×105 years, which has long-term harm to the ecological environment, and it gets special attention in PUREX process.
DENG Yi-lin, ZHANG Hu
doaj   +1 more source

Nitric Acid

open access: yesKirk‐Othmer Encyclopedia of Chemical Technology, 2020
The pure compound is colorless, but older samples tend to acquire a yellow cast due to decomposition into oxides of nitrogen and water. Most commercially available nitric acid has a concentration of 68% in water.
Michael C.E Groves
semanticscholar   +1 more source

Renewable production of ammonia and nitric acid

open access: yesAIChE Journal, 2020
Decarbonization of the power sector offers ammonia industry an opportunity to reduce its CO 2 emissions through sector coupling. Extending from our previous work, we propose a power-based process for ammonia and nitric acid production.
G. Wang, A. Mitsos, W. Marquardt
semanticscholar   +1 more source

The utilization demineralized rice husk waste for biofuel source via pyrolysis: thermogravimetric analysis and kinetic study [PDF]

open access: yesMATEC Web of Conferences, 2019
Rice husk is considered as agricultural waste that causes environmental problem during its handling. In this study, rice husk was treated with acid (citric acid and nitric acid) solutions prior used as raw material for producing biofuel and chemicals via
Wijayanti Hesti   +2 more
doaj   +1 more source

Mechanical Properties of Reactive Powder Concrete (RPC) Exposed to Acidic Solutions

open access: yesTikrit Journal of Engineering Sciences, 2022
This research work includes an experimental investigation to study the mechanical properties of reactive powder concrete (RPC) exposed to acidic solutions.
Ali H. Ali, Ahmed K. Ibrahim
doaj   +1 more source

Optimizing of Synthesis of High Purity HMX Using Polyphosphoric Acid by Response Surface Method [PDF]

open access: yesIranian Journal of Chemical Engineering, 2023
1,3,5,7-tetranitro-1,3,5,7-tetraazacyclooctane (HMX) is one of the most powerful explosives of which the purity may have a significant effect on increasing the performance of rocket engines. In this research, the synthesis of high purity HMX is presented
M.A. Zarei   +5 more
doaj   +1 more source

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