Homogeneous Charge Compression Ignition (HCCI) Combustion of Polyoxymethylene Dimethyl Ethers (PODE).
Author :
Publisher :
Page : pages
File Size : 35,53 MB
Release : 2016
Category :
ISBN :
Author :
Publisher :
Page : pages
File Size : 35,53 MB
Release : 2016
Category :
ISBN :
Author : John Reyes Torres
Publisher :
Page : 156 pages
File Size : 50,30 MB
Release : 1999
Category :
ISBN :
Author : Wenyu Sun
Publisher : Springer Nature
Page : 178 pages
File Size : 42,32 MB
Release : 2023-09-22
Category : Technology & Engineering
ISBN : 9819945100
In this thesis, attention was paid to several novel oxygenated fuels—carbonates, polyethers and ketones. Combustion kinetic investigations were performed for typical representative compounds, including dimethyl carbonate, diethyl carbonate, cyclopentanone, 3-pentanone, 1,2-dimethoxyethane and dimethoxymethane. For experiments, suitable diagnostic techniques were used to measure the detailed speciation information of the target fuels under different conditions. For kinetic modeling, rate coefficients for crucial elementary reactions were obtained through high-level theoretical calculations. Based on that, validated kinetic models with good predictive performances were developed. On the basis of experimental measurements and model interpretations, this work highlighted two important combustion characteristics regarding the practical use: the pollutant formation and the ignition performance. Besides, the correlation between oxygen-containing functional groups and the aforementioned combustion characteristics was revealed. To reveal the potential interactions between the reaction networks of oxygenated additives and the hydrocarbon base fuels during combustion. Chemical structures of laminar premixed flames fueled by binary fuels were measured, and by changing the initial fuel compositions, the addition effects of the oxygenates on the fuel consumption and pollutant formation behaviors were explored. It was found that complicated chemical interactions do not exist in the reaction networks under the investigated conditions.
Author : Dongwon Jung
Publisher :
Page : pages
File Size : 24,77 MB
Release : 2018
Category : Science
ISBN :
This work demonstrates the autoignition and chemical-kinetic mechanisms of homogeneous charge compression ignition (HCCI) combustion for the fuels with various autoignition reactivity. This is done for four fuels: methane, dimethyl ether (DME), iso-octane and n-heptane. Methane and iso-octane are selected as the single-stage ignition fuel, and DME and n-heptane are selected as the two-stage ignition fuel. As a tool for understanding the characteristics of autoignition and combustion process in HCCI engine, a zero-dimensional single-zone engine model of 'CHEMKIN' in Chemkin-Pro was used. The complete compression and expansion strokes were modeled using an engine with a connecting-rod length to crank-radius ratio of 3.5 and a compression ratio of 13. A detailed chemical-kinetic mechanism for methane and DME is Mech_56.54 (113 species and 710 reactions). For iso-octane and n-heptane, a detailed chemical-kinetic mechanism from Lawrence Livermore National Laboratory (1034 species and 4236 reactions) is used. The results show that methane and iso-octane exhibit only the main heat release, 'high-temperature heat release (HTHR)' by high-temperature reactions (HTR). In contrast, both DME and n-heptane exhibit the first heat release 'low-temperature heat release (LTHR)' associated with low-temperature reactions (LTR) before HTHR.
Author : Ashok Kumar Nadda
Publisher : Elsevier
Page : 286 pages
File Size : 41,83 MB
Release : 2023-03-16
Category : Science
ISBN : 0323986412
Nanotechnology for Advanced Biofuels: Fundamentals and Applications highlights emerging techniques for the formulation of fuels using nanotechnology and bio-based concepts. The addition of high-energy nanoparticles and biologically derived molecules in liquid fuel can increase the potential of energy-rich compounds. Key challenges in the production of nanotechnology-based fuels and their combustion or ignition during the operation are covered, along with the emission of oxidized particles and by-products of incomplete combustion and nano-fuels as an emerging field. The bio-based energy-rich fuels are largely diffused in conventionally used fuels. The addition of biofuels and nano-additives to pre-existing fuels can offer opportunities for developing modified fuels in domestic industries with the maximum usage of renewable biomass. This is an important reference source for materials scientists, energy scientists and chemical engineers who want to understand more about how nanotechnology can help create more efficient biofuels. - Shows how nano-additives can significantly improve the properties and efficiency of biofuels - Provides information to help readers better understand the basic and advanced applications of nano-additive-based biofuels - Assesses the challenges of manufacturing nanotechnology-enhanced biofuels on an industrial scale
Author : Jacob Richard Zuehl
Publisher :
Page : 260 pages
File Size : 39,5 MB
Release : 2009
Category :
ISBN :
Author : Society of Automotive Engineers
Publisher :
Page : 150 pages
File Size : 22,87 MB
Release : 2001
Category : Technology & Engineering
ISBN : 9780768007749
Author :
Publisher :
Page : 592 pages
File Size : 18,8 MB
Release : 2007
Category : Internal combustion engines
ISBN :
Author : Ioannis V. Yentekakis
Publisher : MDPI
Page : 166 pages
File Size : 31,72 MB
Release : 2020-05-13
Category : Science
ISBN : 3039288350
Heterogeneous catalysis played, plays, and will continue to play, a major key role in industrial processes for large-scale synthesis of commodity chemicals of global importance, and in catalytic systems that possess a critical role in energy generation and environmental protection approaches. As a result of the ongoing progress in materials science, nanotechnology, and characterizations, great advances have been achieved in heterogeneous catalysis by nanomaterials. Efficient approaches and advanced methods for the design of nano-structured composite materials (up to atomic level), subject to specific nano-morphologies with enhanced metal–metal and metal–support interactions favorable for catalysis (that enable fine-tuning of the critical properties of the designed catalysts), provide optimized catalysts with outstanding performances in numerous eco-friendly and cost-effective applications. Accordingly, great progress has been achieved involving, for example, emissions control, waste treatment, photocatalytic, bio-refinery, CO2 utilization, and fuel cells applications, as well as hydrocarbon processing for H2, added-value chemicals, and liquid fuels production. The themed Special Issue has succeeded in collecting 10 high-quality contributions that cover recent research progress in the field for a variety of applications (e.g., environment, energy, added-value chemicals/organics synthesis, and bio-transformation) declaring the prospect and importance of nanomaterials in all the directions of heterogeneous catalysis.
Author : Robert Vern Mills
Publisher :
Page : 154 pages
File Size : 31,1 MB
Release : 2007
Category :
ISBN :