Structure-Sensitivity Relationships in Energetic Compounds

1990 ◽  
pp. 157-173 ◽  
Author(s):  
J. S. Murray ◽  
P. Politzer
Keyword(s):  
Structure Sensitivity ◽  
Energetic Compounds

Some Computationally-Predicted Properties of a Group of Proposed Energetic Compounds.

1996 ◽  
Author(s):  
Peter Politzer ◽  
Pat Lane ◽  
M. E. Grice
Keyword(s):  
Energetic Compounds

Biotransformation of nitrocellulose under methanogenic conditions

1996 ◽  
Vol 34 (5-6) ◽  
pp. 327-334 ◽  
Author(s):  
David L. Freedman ◽  
Bryan M. Caenepeel ◽  
Byung J. Kim
Keyword(s):  
Biological Treatment ◽  
Enrichment Culture ◽  
Basal Medium ◽  
Anaerobic Biodegradation ◽  
Anaerobic Treatment ◽  
Acid Digestion ◽  
Energetic Compounds ◽  
Nitrate Ester ◽  
Digestion Technique ◽  
Aerobic And Anaerobic

Treatment of wastewater containing nitrocellulose (NC) fines is a significant hazardous waste problem currently facing manufacturers of energetic compounds. Previous studies have ruled out the use of biological treatment, since NC has appeared to be resistant to aerobic and anaerobic biodegradation. The objective of this study was to examine NC biotransformation in a mixed methanogenic enrichment culture. A modified cold-acid digestion technique was used to measure the percentage of oxidized nitrogen (N) remaining on the NC. After 11 days of incubation in cultures amended with NC (10 g/L) and methanol (9.9 mM), the % N (w/w) on the NC decreased from 13.3% to 10.1%. The presence of NC also caused a 16% reduction in methane output. Assuming the nitrate ester on NC was reduced to N2, the decrease in CH4 represented almost exactly the amount of reducing equivalents needed for the observed decrease in oxidized N. An increase in the heat of combustion of the transformed NC correlated with the decrease in % N. There was no statistically significant decrease in % N when only NC was added to the culture, or in controls that contained only the sulfide-reduced basal medium. The biotransformed NC has a % N comparable to nonexplosive nitrated celluloses, suggesting that anaerobic treatment may be a technically feasible process for rendering NC nonhazardous.

Structure Sensitivity Analysis and Dynamic Performance Optimization of Marine Gearbox

2017 ◽  
Author(s):  
Tengjiao Lin ◽  
Daokun Xie ◽  
Ziran Tan ◽  
Bo Liu
Keyword(s):  
Sensitivity Analysis ◽  
Performance Optimization ◽  
Optimization Design ◽  
Dynamic Performance ◽  
Structure Sensitivity ◽  
Superposition Method ◽  
Structure Parameters ◽  
Analysis Model ◽  
Vibration Acceleration ◽  
Response Optimization

The aim of this paper is to investigate the influence of structure parameters on the vibration characteristics and improve the dynamic performance of marine gearbox. A finite element model was established to solve the dynamic response by using modal superposition method. Based on the theory of multi-objective optimization design, the structure sensitivity analysis model of marine gearbox was established, which takes the structure parameters of the housing as design variables. The modal and response sensitivity was obtained by using the optimal gradient method. According to the results of sensitivity analysis, a modal and response optimization model of marine gearbox was established. The objective was to avoid natural frequencies from the excitation frequencies and minimize the root mean square of vibration acceleration of the evaluating points on the surface of housing. Then the modal optimization and response optimization of gearbox were carried out by using zero-order and first-order optimization method. The results indicate that the dynamic optimization of the gearbox can be achieved. After optimization, the amplitude of vibration acceleration of the evaluating points on the housing surface has been reduced and the resonance of marine gearbox can be avoided.

Structure sensitivity of ammonia electro-oxidation on transition metal surfaces: A first-principles study

2021 ◽  
Vol 397 ◽  
pp. 137-147
Author(s):  
Ahmed O. Elnabawy ◽  
Jeffrey A. Herron ◽  
Sara Karraker ◽  
Manos Mavrikakis
Keyword(s):  
Transition Metal ◽  
First Principles ◽  
Metal Surfaces ◽  
Structure Sensitivity ◽  
First Principles Study ◽  
Transition Metal Surfaces ◽  
Electro Oxidation

Mono-N-oxidation of heterocycle-fused pyrimidines

2021 ◽  
Vol 50 (6) ◽  
pp. 2143-2148
Author(s):  
Yongxing Tang ◽  
Kejia Li ◽  
Ajay Kumar Chinnam ◽  
Richard J. Staples ◽  
Jean'ne M. Shreeve
Keyword(s):  
Mild Oxidation ◽  
Oxidation Reactions ◽  
Energetic Compounds ◽  
Thermal Stabilities

Mild oxidation reactions of nitrogen-rich heterocyclic rings lead to the formation of energetic compounds with the mono-N-oxide moiety which show good thermal stabilities and detonation performances.

Rationalizing an Unexpected Structure Sensitivity in Heterogeneous Catalysis—CO Hydrogenation over Rh as a Case Study

ACS Catalysis ◽  
2021 ◽  
pp. 5189-5201
Author(s):  
Max Schumann ◽  
Monia R. Nielsen ◽  
Thomas E. L. Smitshuysen ◽  
Thomas W. Hansen ◽  
Christian D. Damsgaard ◽  
...  
Keyword(s):  
Heterogeneous Catalysis ◽  
Co Hydrogenation ◽  
Structure Sensitivity

Theoretical studies on a series of nitroaliphatic energetic compounds

2014 ◽  
Vol 23 (6) ◽  
pp. 063103
Author(s):  
Hui Zeng ◽  
Jun Zhao
Keyword(s):  
Theoretical Studies ◽  
Energetic Compounds
Sign in / Sign up

Export Citation Format

Share Document