Experimental and theoretical study on 2-ethylnorbornane pyrolysis under atmospheric and high pressure

Wang, Hongyan; Zhang, Bofeng; Gong, Siyuan; Liu, Yujie; Wang, Li; Zhang, Xiangwen; Liu, Guozhu

doi:10.1016/j.fuel.2020.117724

Cited by 9 publications

(3 citation statements)

References 64 publications

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“…The detailed introduction of the experimental raw material PMT 22 and the experimental apparatus is referred to in our previous work. 21,22,31,32 Briefly, the tandem microreactor was equally divided into two stages and could be independently temperature-controlled (±1 K), in which the first microreactor was used for sample preheating (set at 623 K), and the second microreactor was used for pyrolysis (set at 773−1023 K). Each microreactor included a stainless-steel reaction tube (o.d.…”

Section: Methodsmentioning

confidence: 99%

“…The pyrolysis experiments of PMT were carried out in a tandem microreactor (Rx-3050 TR, Frontier Laboratories, Japan) with the GC-MS/FID (QP2010, Shimadzu) system realizing online detection under a temperature of 773–1023 K and pressure of 0.1 and 2.0 MPa. The detailed introduction of the experimental raw material PMT and the experimental apparatus is referred to in our previous work. ,,, Briefly, the tandem microreactor was equally divided into two stages and could be independently temperature-controlled (±1 K), in which the first microreactor was used for sample preheating (set at 623 K), and the second microreactor was used for pyrolysis (set at 773–1023 K). Each microreactor included a stainless-steel reaction tube (o.d.…”

Section: Experimental Sectionmentioning

confidence: 99%

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Experimental and Kinetic Modeling of Biomass Derived Hydrocarbon p-Menthane Pyrolysis

et al. 2020

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The extensive production of alternative fuels from renewable biomass sources through microbial fermentation has attracted wide attention, which is a large-scale and targeted means to meet various application conditions. As an alternative terpenoid hydrocarbon fuel produced by this renewable means, there is a large application prospect for cycloalkane p-menthane (1-isopropyl-4methylcyclohexane, PMT). In this work, the atmospheric pyrolysis performance of PMT was investigated by the pyrolysis experiment under 773−1023 K in a tandem microreactor and GC-MS/FID online detection system. The emphasis of this work is to comprehensively analyze the pyrolysis mechanism of PMT, with a detailed reaction kinetic model (294 species and 1862 reactions) proposed. Besides, we preliminarily discuss the pressure dependence of PMT pyrolysis between the atmospheric data and newly investigated high-pressure data at the same temperature and residence time. The model well reproduced the experimental product distributions under both of the pressures. It is found that the side chain scission of PMT served as chain initiation reactions including the isopropyl scission and methyl scission, which contribute much to the consumption of PMT according to the sensitivity analysis. Those unimolecular decomposition reactions more easily occur under low pressure and have greater contributions to the fuel consumption. The H-abstraction reaction takes the largest proportion in the consumption paths of PMT benefiting from the massive generation of small groups. The ring-opening reactions of the generated radicals and the subsequent reactions produce a large number of branched alkenes and conjugated dienes, such as 3-methyl-1-butene, 2-methyl-1,3-butadiene, etc. Aromatic products are mainly benzene and toluene, the formation of which is mainly through C5 cyclic and C6 cyclic precursors. This work aims to provide a reference for understanding the pyrolysis behavior of multibranched cycloalkanes and cyclic terpenoids.

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Section: Methodsmentioning

confidence: 99%

Section: Experimental Sectionmentioning

confidence: 99%

Experimental and Kinetic Modeling of Biomass Derived Hydrocarbon p-Menthane Pyrolysis

et al. 2020

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“…The results showed that the greatest influence on the main cutting force was the cutting depth, and the greatest influence on the surface roughness was the feed rate. Wang et al [32] found through simulation analysis of tool friction performance under dry cutting and high-pressure cooling conditions that the friction coefficient between tool and chip under high-pressure cooling was lower than that under dry cutting.…”

Section: Introductionmentioning

confidence: 99%

Research on Cutting Layer Characteristics of Superalloy under High-Pressure Cooling

Chen

et al. 2023

Materials

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Superalloys are widely used in the aerospace field and are a typical difficult-to-cut material. When the PCBN tool is used to cut superalloys, there will be problems such as a large cutting force, a high cutting temperature, and gradual tool wear. High-pressure cooling technology can effectively solve these problems. Therefore, this paper carried out an experimental study of a PCBN tool cutting superalloys under high-pressure cooling and analyzed the influence of high-pressure coolant on the characteristics of the cutting layer. The results show that the main cutting force can be reduced by 19~45% and 11~39% when cutting superalloys under high-pressure cooling compared with dry cutting and atmospheric pressure cutting, respectively, in the range of test parameters. The surface roughness of the machined workpiece is less affected by the high-pressure coolant, but the high-pressure coolant can help reduce the surface residual stress. The high-pressure coolant can effectively improve the chip’s breaking ability. In order to ensure the service life of PCBN tools, when cutting superalloys under high-pressure cooling the coolant pressure should not be too high, and 50 bar is more appropriate. This provides a certain technical basis for the efficient cutting of superalloys under high-pressure cooling conditions.

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Experimental and kinetic modeling study of C5 cyclic hydrocarbons pyrolysis at elevated pressures: Effect of unsaturation on the reactivity and PAH formation

Wang,

Sun,

Zhou

et al. 2024

Chemical Engineering Journal

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Experimental and theoretical study on 2-ethylnorbornane pyrolysis under atmospheric and high pressure

Cited by 9 publications

References 64 publications

Experimental and Kinetic Modeling of Biomass Derived Hydrocarbon p-Menthane Pyrolysis

Experimental and Kinetic Modeling of Biomass Derived Hydrocarbon p-Menthane Pyrolysis

Research on Cutting Layer Characteristics of Superalloy under High-Pressure Cooling

Experimental and kinetic modeling study of C5 cyclic hydrocarbons pyrolysis at elevated pressures: Effect of unsaturation on the reactivity and PAH formation

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