Analysis of Visualized Complex Reaction Network in Low- Temperature Molecular Plasma

Author(s):  
Osamu Sakai ◽  
Yasutaka Mizui ◽  
Kyosuke Nobuto ◽  
Shigeyuki Miyagi
Author(s):  
Tangjie Gu ◽  
Wen Zhu ◽  
Bo Yang

Ethanol steam reforming is one of the most widely used processes for hydrogen production, but the mechanism of the whole reaction pathway from ethanol to CO and CO2 has not...


2016 ◽  
Vol 195 ◽  
pp. 497-520 ◽  
Author(s):  
Jonny Proppe ◽  
Tamara Husch ◽  
Gregor N. Simm ◽  
Markus Reiher

For the quantitative understanding of complex chemical reaction mechanisms, it is, in general, necessary to accurately determine the corresponding free energy surface and to solve the resulting continuous-time reaction rate equations for a continuous state space. For a general (complex) reaction network, it is computationally hard to fulfill these two requirements. However, it is possible to approximately address these challenges in a physically consistent way. On the one hand, it may be sufficient to consider approximate free energies if a reliable uncertainty measure can be provided. On the other hand, a highly resolved time evolution may not be necessary to still determine quantitative fluxes in a reaction network if one is interested in specific time scales. In this paper, we present discrete-time kinetic simulations in discrete state space taking free energy uncertainties into account. The method builds upon thermo-chemical data obtained from electronic structure calculations in a condensed-phase model. Our kinetic approach supports the analysis of general reaction networks spanning multiple time scales, which is here demonstrated for the example of the formose reaction. An important application of our approach is the detection of regions in a reaction network which require further investigation, given the uncertainties introduced by both approximate electronic structure methods and kinetic models. Such cases can then be studied in greater detail with more sophisticated first-principles calculations and kinetic simulations.


Author(s):  
L. K. Doraiswamy

Procedures were formulated in Chapter 5 for treating complex reactions. We now turn to the design of reactors for such reactions. Continuing with the ethylation reaction, we consider the following reactor types for which design procedures were formulated earlier in Chapter 4 for simple reactions: batch reactors, continuous stirred reactors (or mixed-flow reactors), and plug-flow reactors. However, we use the following less formal nomenclature: A = aniline, B = ethanol, C = monoethyaniline, D = water, E = diethylaniline, F = diethyl ether, and G = ethylene. The four independent reactions then become Using this set of equations as the basis, we now formulate design equations for various reactor types. Detailed expositions of the theory are presented in a number of books, in particular Aris (1965, 1969) and Nauman (1987). Consider a reaction network consisting of N components and M reactions. A set of N ordinary differential equations, one for each component, would be necessary to mathematically describe this system. They may be concisely expressed in the form of Equation 5.5 (Chapter 5), or . . . d(cV)/dt = vrV (11.1) . . . The use of this equation in developing batch reactor equations for a typical complex reaction is illustrated in Example 11.1.


2020 ◽  
Vol 852 ◽  
pp. 170-179
Author(s):  
Si Meng Yan ◽  
Nai Sheng Guo ◽  
Shi Gang Yan ◽  
Xin Jin

After the paper uses a unique domestic natural rubber Eucommia to establish a chemical link between the asphalt and the solubility of the powder, analyzed the structure of the double bond vulcanization gutta percha and the solubility of the powder, gutta percha and asphalt amino group of the reaction maleic anhydride, and so gutta appreciate and a chemical link. Analysis then grafted with maleic anhydride mix and low temperature, water stability and mechanical properties, aging resistance. The results found, gutta vulcanized rubber powder can be promoted, but enhance mixing; material properties are not obvious. Maleic anhydride grafted gutta percha is established after the reaction network vulcanized rubber powder and asphalt, so that performance significantly. : Less than 2% when the dosage was added gutta percha grafted SBS modified asphalt to improve its high temperature and aging resistance, without reducing the low-temperature performance, and 1.5% ash graft gutta SBS modified to be most significant .


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