Experimental and Modeling Investigation of n-Decane Pyrolysis at Supercritical Pressures

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• 作者：Zhenjian Jia ; Hongyan Huang ; Weixing Zhou ; Fei Qi ; Meirong Zeng
• 刊名：Energy & Fuels
• 出版年：2014
• 出版时间：September 18, 2014
• 年：2014
• 卷：28
• 期：9
• 页码：6019-6028
• 全文大小：708K
• ISSN：1520-5029

文摘

The pyrolysis mechanism of fuel under supercritical conditions is an important concern for developing regenerative cooling technology of advanced aircraft using hydrocarbon fuel as the primary coolant. n-Decane as a component of some jet fuels was studied at the temperature range from 773 to 943 K in a flow reactor under the pressure of 3, 4, and 5 MPa. Gas chromatograph/mass spectrometry was used to analyze the pyrolysis products, which were mainly alkanes from C₁鈥揅₉ and alkenes from C₂鈥揅₉. A kinetic model containing 164 species and 842 reactions has been developed and validated by the experimental results including the distributions of products and the chemical heat sink of fuel. The decomposition pathways of n-decane were illustrated through the reaction flux analysis. It is concluded that the C₄鈥揅₉ alkanes are mainly generated by the recombinations of alkyls, while the small alkanes (C₁鈥揅₃) are formed by H-abstraction reactions by C₁鈥揅₃ alkyl radicals. The applicability at supercritical pressure and high fuel concentration condition of previous models was discussed, and the performance of the present model in reproducing the experimental data is reasonably good.