, , Qiao Xinqi
Abstract:
as an isoalkane, isodecane is often used as a model fuel to simulate the actual fuel of an automobile engine to analyze the combustion or emission characteristics of the engine. The direct relationship diagram method (DRGEP) including error propagation was used to preliminarily simplify the reaction mechanism of isodecane, and the formation/consumption rate analysis (ROP) was used to simplify the reaction mechanism, the reaction rate of each component was analyzed, and the secondary components and their secondary reactions were deleted. The parameters of sensitive reactions were optimized by particle swarm optimization algorithm to reduce the deviation of simulation results after ROP simplification; the sensitivity analysis (SA) is used to further simplify the reaction mechanism, analyze the important reactions to the three reactors, and delete the secondary reactions or supplementary important reactions of the target parameters with the custom threshold respectively, finally, a simplified mechanism of 83 components in 299-step reaction of isodecane was obtained. The results show that the simplified mechanism is used to describe the ignition period of isodecane and air combustion process, the evolution history of component concentrations of reactants and products and the flame propagation speed have the same calculation accuracy as the detailed mechanism.
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Key words:
Direct relation graph method sensitivity analysis generation rate analysis method isodecane particle swarm optimization
DOI:
10.3969/j.issn.2095-1469.2018.05.03
year:
2018
Author:
Li Bo , Zhang Hai ,Fokion N Egolfopoulos
Abstract:
Under the conditions of atmospheric pressure and initial temperature of 443 K, the extinction characteristics of non-premixed flame of ISO-decalin and decalin were studied by using the counter flame technique, the quenching limit K_(ext) was measured and compared with K_(ext) of n-decane/nitrogen. The experimental results show that with the increase of the mass fraction of fuel side, the K_(ext) of isodecane/nitrogen and decalin/nitrogen increases, and the K_(ext) of isodecane/nitrogen increases. The K_(ext) of n-decane/nitrogen is lower than that of the same fuel concentration. The analysis shows that this is mainly due to the production of stable and not easy to decompose products in the oxidation process of isodecane.
Key words:
isodecane; Decalin; Non-premixed flame; extinction limit; Hedge flame
DOI:
CNKI:SUN:GCRB.0.2014-04-042
year:
2014
CN201910744129.6
application date:
2019-08-13
Public/Announcement Number:
CN110304984A
Public/announcement date:
2019.10.08
applicant (patent):
Heilongjiang University
inventor:
wei wu Jia Guozhi , Snow Peak White , Wang Wei , Guo Chunmu
National and provincial code:
CN230103
Abstract:
A method for preparing isodecane by using a high-efficiency bifunctional catalyst. The invention relates to a method for preparing isoparaffins by hydroisomerization of long-chain n-alkanes, it is necessary to solve the problems of high cost, low reaction activity and isomerization selectivity caused by the large amount of precious metals in the existing catalysts. Preparation Method: The dual-function catalyst is loaded into the constant temperature zone of the fixed bed reactor, and after activation, n-Decane is continuously injected into the fixed bed reactor with a feed pump, and the reaction temperature is controlled to 260~380 ℃, the reaction pressure was 1.0-4.0MPa, and isodecane was obtained. The catalyst used in the present invention is supported on multi-stage porous SAPO41 molecular sieve nanosheets as low as 0.09wt. The bifunctional catalyst prepared by Pd not only significantly reduces the cost of the catalyst, but also greatly improves the diffusion performance of isoparaffins, and improves the reaction activity and isomerization selectivity of the catalyst.
Li Bo , Zhang Hai ,F Egolfopoulos
Abstract:
isodecane; Decalin; Non-premixed flame; Extinction limit; Hedge flame
Key words:
isodecane decalin Non-premixed flame extinction limit hedge flame
Meeting Time:
2013