scholarly journals On learning monotone DNF under product distributions

2004 ◽  
Vol 193 (1) ◽  
pp. 57-74 ◽  
Author(s):  
Rocco A Servedio
Keyword(s):  
Product Distributions

PENGGUNAAN AIR SUPER KRITIS PADA DEPOLIMERISASI NYLON-12 (BATCH PROCESS)

2018 ◽  
Vol 5 (3) ◽  
Author(s):  
Mohamad Yusman
Keyword(s):  
Supercritical Water ◽  
Scale Up ◽  
Experimental Studies ◽  
Reaction System ◽  
Batch Process ◽  
Chemical Recycling ◽  
Water Decomposition ◽  
Product Distributions ◽  
New Process ◽  
Nylon 12

Water at the supercritical state is a new process for the chemical recycling. At this thermodynamic state i.e. Pc = 218 atmospheres and Tc = 374oC , water behaves very differently from its everyday temperament and it is a very good solvent for organic components. Experimental studies show that supercritical water can decompose hydrocarbons/polymers and produce useful products like 2-Azacyclotridecanone /lactam-1 from Nylon-12 (batch process). The decomposition process itself was carried out in batch reaction system in order to get more information about product distributions, time dependence, and scale-up possibilities.Keywords: supercritical water, decomposition, batch, polymer, hydrocarbon

Product Distributions of Fischer-Tropsch Synthesis over Core-Shell Catalysts: The Effects of Diverse Shell Thickness

2018 ◽  
Vol 3 (44) ◽  
pp. 12415-12423 ◽  
Author(s):  
Zhipeng Tian ◽  
Chenguang Wang ◽  
Zhan Si ◽  
Yachen Wang ◽  
Lungang Chen ◽  
...  
Keyword(s):  
Shell Thickness ◽  
Tropsch Synthesis ◽  
Core Shell ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Product Distributions

Comparison of product distributions from the thermal reactions of tetralin in a stirred autoclave and a flowing-solvent reactor

Fuel ◽  
1994 ◽  
Vol 73 (6) ◽  
pp. 789-794 ◽  
Author(s):  
Dominique Brodzki ◽  
Gérald Djéga-Mariadassou ◽  
Chun-Zhu Li ◽  
Rafael Kandiyoti
Keyword(s):  
Thermal Reactions ◽  
Product Distributions

scholarly journals Relative Rates of Bond Rotation and Ring Closure in the Photocycloaddition Intermediates from Fullerene-C60 and the Isomeric 2,4-Hexadienes

2019 ◽  
Author(s):  
Wendell Dilling
Keyword(s):  
Relative Rate ◽  
Product Distribution ◽  
Fullerene C60 ◽  
Ring Closure ◽  
Trans Conformation ◽  
Bond Rotation ◽  
Product Distributions

<p>Photocycloaddition of fullerene-C<sub>60 </sub>to the isomeric 2,4-hexadienesreported by Orfanopoulos and co-workers gave a series of 2 + 2 cycloadducts in which bond rotation had occurred in some products. Relative rates of bond rotation and ring closure in the biradical intermediates were calculated from the product distributions using equations developed by Bartlett and co-workers. These data are reinterpreted to show that the ratio of the rate of bond rotation in the intermediate to the rate of ring closure to the cyclobutane product is ~70 for the <i>trans</i>-1-propenyl intermediate formed in the initial cis conformation. Data are inconsistent for the analogous <i>cis</i>-1-propenyl intermediate. The relative rate for the <i>trans</i>-1-propenyl intermediate formed in the initial trans conformation is ~9. Accurate relative rate determinations are highly dependent on very accurate product distribution determinations.</p>

Flow and Chemical Kinetics Simulations of Endothermic Fuels

2003 ◽  
Author(s):  
Thomas A. Ward ◽  
Jamie S. Ervin ◽  
Richard C. Striebich ◽  
Steven Zabarnick
Keyword(s):  
Heat Transfer ◽  
Computational Model ◽  
Chemical Kinetics ◽  
Flow Reactor ◽  
Two Dimensional ◽  
Flow Properties ◽  
Supercritical Regime ◽  
Fuel Flow ◽  
Product Distributions ◽  
Heat Transfer Limit

Advanced aircraft engines are reaching a practical heat transfer limit beyond which the convective heat transfer provided by hydrocarbon fuels is no longer adequate. One solution is to use an endothermic fuel that absorbs heat through chemical reactions. This paper describes the development of a two-dimensional computational model of the heat and mass transport associated with a flowing fuel using a unique global chemical kinetics model. Most past models do not account for changes in the chemical composition of a flowing fuel and also do not adequately predict flow properties in the supercritical regime. The two-dimensional computational model presented here calculates the changing flow properties of a supercritical reacting fuel by use of experimentally derived proportional product distributions. The present calculations are validated by measured experimental data obtained from a flow reactor of mildly cracked n-decane. It is believed that these simulations will assist the fundamental understanding of high temperature fuel flow experiments.

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