An overview of polyoxymethylene dimethyl ethers as alternative fuel for compression ignition engines. (15th June 2022)

• Record Type: Journal Article
• Authors: Liu, Junheng; Wang, Lejian; Wang, Pan; Sun, Ping; Liu, Haifeng; Meng, Zhongwei; Zhang, Lidong; Ma, Hongjie
• Is Part Of: Fuel. Volume 318(2022)
• Publication Date: 2022-06-15
• Subjects: Alternative fuel -- Diesel engine -- Polyoxymethylene dimethyl ethers -- Emission performance -- Combustion characteristic -- Reaction mechanism; ATDC after top dead center -- BTDC before top dead center -- BMEP brake mean effective pressure -- BSFC brake specific fuel consumption -- BSEC brake specific energy consumption -- BTE brake thermal efficiency -- CA crank angle -- CO carbon monoxide -- CO2 carbon dioxide -- CI compression ignition -- COV coefficient of variations -- CNG compressed natural gas -- CVSV constant volume spherical vessel -- DME dimethyl ether -- DMM dimethoxymethane -- DI direct injection -- DOC diesel oxidation catalyst -- DTG differential thermogravimetric -- EGR exhaust gas recirculation -- HCCI homogeneous charge compression ignition -- HTHR high-temperature heat release -- HRR heat release rate -- HFB heat flux burner -- ITE indicated thermal efficiency -- IMEP indicated mean effective pressure -- JSR jet stirred reactor -- LTC low temperature combustion -- LTHR low-temperature heat release -- MPCI multiple premixed compression ignition -- MPRR maximum pressure rise rate -- NTC negative temperature coefficient -- NOx nitrogen oxides -- PM particulate matter -- PN particle number -- PODE/OME polyoxymethylene dimethyl ethers -- PCCI premixed charge compression ignition -- PPCI partially premixed combustion ignition -- PAHs polycyclic aromatic hydrocarbons -- PFI port fuel injection -- PRF primary reference fuel -- RCCI reactivity controlled compression ignition -- RI ringing intensity -- RCM rapid compression machine -- RSM response surface methodology -- SMD sauter mean diameter -- STP spray tip penetration -- ST shock tube -- SB spherical bomb -- TWC three-way catalyst -- THC total hydrocarbon -- TG thermogravimetric -- VOS volatile organic compounds -- WDF wide distillation fuel -- YSI yield sooting index; Fuel -- Periodicals; Coal -- Periodicals; Coal; Fuel; Periodicals; 662.6
• DOI: 10.1016/j.fuel.2022.123582
• Languages: English
• ISSNs: 0016-2361

Abstract

Highlights: The synthetic technology of PODE and the prospect for alternative fuels are assessed. The physicochemical and spray characteristics of PODE blended fuels are detailed. The application of PODE increases thermal efficiency and reduces certain emissions. The benefits of using PODE for advanced combustion modes are discussed in detail. The latest research progress on the oxidation mechanisms of PODE is summarized. Abstract: The application of oxygenated alternative fuels in diesel engines is an effective solution to the energy crisis and environment pollution. Polyoxymethylene dimethyl ethers (PODE), as a coal-based and biomass oxygenated fuel, is considered to be a new promising alternative fuel for petroleum due to its good physicochemical properties and excellent combustion and emission characteristics in engines. The application advantages of PODE are mainly reflected in reducing particulate matter and greenhouse gases, achieving carbon neutrality and fuel diversification, alleviating energy shortages, solving methanol overcapacity and so on. In the review, the manufacturing processes, synthetic methods and raw materials of PODE are expounded in order to comprehend the production capacity and economic value. Then, the physicochemical properties and the spray and atomization characteristics of PODE and PODE blended fuels are summarized, and the advantages and disadvantages of PODE engine are discussed in detail. The applications of PODE in engines are classified and summarized from two aspects: (1) PODE as an additive to improve fuel properties of diesel engines, (2) PODE applied in advanced combustion modes, including homogeneous charge compression ignition, premixed charge compression ignition and reactivity controlled compression ignition. Related studies demonstrate that PODE is a better choice to replace gasoline or diesel fuel in terms of engine performance, combustion and emission characteristics. Finally, the oxidation mechanisms of PODE are summarized, and the future research directions of PODE are also proposed. A comprehensive review of the published literature will help researchers understand the latest technologies and forward theories of PODE applied in the engine.