Process intensification writ large with microchannel absorption in nitric acid production

2017 ◽  
Vol 169 ◽  
pp. 140-150 ◽  
Author(s):  
Jessy J.L. Lee ◽  
Brian S. Haynes
Keyword(s):  
Nitric Acid ◽  
Acid Production ◽  
Process Intensification

scholarly journals FeOx/Al2O3 catalysts for high-temperature decomposition of N2O under conditions of NH3 oxidation in nitric acid production

2018 ◽  
Vol 8 (11) ◽  
pp. 2841-2852 ◽  
Author(s):  
Galina Sádovská ◽  
Edyta Tabor ◽  
Milan Bernauer ◽  
Petr Sazama ◽  
Vlastimil Fíla ◽  
...  
Keyword(s):  
High Temperature ◽  
Nitric Acid ◽  
Acid Production ◽  
Active Species ◽  
Gas Mixture ◽  
Temperature Decomposition ◽  
Nh3 Oxidation ◽  
Oxidation Of Ammonia

The δ and θ Al2O3 phases well stabilized Fe(iii) in Td or Oh coordination, which were identified as the active species in high temperature decomposition of N2O in a complex gas mixture produced by oxidation of ammonia.

Removal of Nitrous Oxide in Nitric Acid Production

2019 ◽  
Vol 60 (6) ◽  
pp. 744-760 ◽  
Author(s):  
L. A. Isupova ◽  
Yu. A. Ivanova
Keyword(s):  
Nitrous Oxide ◽  
Nitric Acid ◽  
Acid Production

Research of the Steady-State Modeling Method Based on Neural Network

2013 ◽  
Vol 441 ◽  
pp. 526-529
Author(s):  
Yu Hua Zhu ◽  
Dian Zheng Zhuang
Keyword(s):  
Neural Network ◽  
Steady State ◽  
Nitric Acid ◽  
Production Process ◽  
Acid Production ◽  
Actual System ◽  
Production History ◽  
System Input ◽  
Mechanism Modeling ◽  
The Right

Nitric acid production process is complicated reaction mechanism, serious non-linear the traditional mechanism modeling to get the low accuracy of the mathematical model. This paper adopts a non-mechanism modeling, using the production history data, the use of artificial neural network has the right to arbitrary nonlinear mapping any approximation ability to simulate the relationship of the actual system input-output, trained to be get steady-state model of the nitric acid production process.

scholarly journals Catalytic oxidation of NO to NO2 for nitric acid production over a Pt/Al2O3 catalyst

2018 ◽  
Vol 564 ◽  
pp. 142-146 ◽  
Author(s):  
Ata ul Rauf Salman ◽  
Bjørn Christian Enger ◽  
Xavier Auvray ◽  
Rune Lødeng ◽  
Mohan Menon ◽  
...  
Keyword(s):  
Nitric Acid ◽  
Catalytic Oxidation ◽  
Acid Production ◽  
Oxidation Of No ◽  
Al2o3 Catalyst

scholarly journals Energy integration of nitric acid production using pinch methodology

2015 ◽  
Vol 69 (3) ◽  
pp. 261-268 ◽  
Author(s):  
Gorica Ivanis ◽  
Marija Lazarevic ◽  
Ivona Radovic ◽  
Mirjana Kijevcanin
Keyword(s):  
Heat Transfer ◽  
Nitric Acid ◽  
Process Optimization ◽  
Process Parameters ◽  
Process Simulation ◽  
Heat Exchangers ◽  
Acid Production ◽  
Energy Integration

Pinch methodology was applied to the heat exchangers network (HEN) synthesis of nitric acid production. The integration is analyzed in two ways, and the results are presented as two different solutions: (i) the first solution is based on the original heat transfer equipment arrangement, (ii) in order to eliminate the shortages of the first solution the second HEN was obtained using process simulation with optimized process parameters. Optimized HEN, with new arrangement of heat exchangers, gave good results in energy and process optimization.

scholarly journals The role of ice in N<sub>2</sub>O<sub>5</sub> heterogeneous hydrolysis at high latitudes

2008 ◽  
Vol 8 (4) ◽  
pp. 12595-12624 ◽  
Author(s):  
R. L. Apodaca ◽  
D. M. Huff ◽  
W. R. Simpson
Keyword(s):  
Steady State ◽  
Nitric Acid ◽  
Surface Area ◽  
High Latitude ◽  
Acid Production ◽  
High Latitudes ◽  
Air Masses ◽  
Mixing Ratios ◽  
Reactive Surfaces

Abstract. We report evidence for ice catalyzing N2O5 heterogeneous hydrolysis from a study conducted near Fairbanks, AK in November 2007. Mixing ratios of N2O5, NO, NO2, and ozone are reported and are used to determine steady state N2O5 lifetimes. When air masses are sub-saturated with respect to ice, the data show longer lifetimes (≈20 min) and elevated N2O5 levels, while ice-saturated air masses show shorter lifetimes (≈6 min) and suppressed N2O5 levels. We also report estimates of aerosol surface area densities that are on the order of 50 μm2/cm3, a surface area density that is insufficient to explain the rapid losses of N2O5 observed in this study, reinforcing the importance of other reactive surfaces such as ice. Ice-saturated pollution plumes are ubiquitous in high latitudes; therefore, catalysis on these surfaces is largely responsible for nocturnal processing of N2O5 leading to nitric acid production and loss of NOx in high latitude plumes.

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