Effects of EGR combined with DOC on emission characteristics of a two-stage injected Fischer-Tropsch diesel/methanol dual-fuel engine

Chen, Dongdong; Wang, Tie; Yang, Tiantian; Li, Guoxing; Chen, Yao; Qiao, Tianyou

doi:10.1016/j.fuel.2022.125451

Cited by 22 publications

(6 citation statements)

References 46 publications

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“…Sleeves (6) were welded before and after the package for the installation of thermometers or thermocouples for flue gas temperature measurement. Pipes (7) for measuring vacuum before and after the stack of pipes and sampling flue gases for analysis were installed. Cooling of the pipe samples was carried out by supplying water through the hollow screw and the annular gap between the pipe and the screw.…”

Section: Experimental Researchmentioning

confidence: 99%

“…The value of E i can be found from Equation (7). The value of E e can be found as the sum ∑ n i=1 E i .…”

Section: Influence Of Hes Metal Wall Temperature and Excess Air Coeff...mentioning

confidence: 99%

“…Most of them are associated with the impact on the combustion process in order to suppress emissions, primarily NO x and SO x : exhaust gas recirculation [1], two-stage [2] and three-stage combustion [3], non-stoichiometric combustion [4], structural and technological improvement [5]. A combination of several methods is recommended [6,7].…”

Section: Introductionmentioning

confidence: 99%

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Research of Exhaust Gas Boiler Heat Exchange Surfaces with Reduced Corrosion When Water-Fuel Emulsion Combustion

et al. 2022

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The application of water-fuel emulsion (WFE) in internal combustion engines enables to reduce the consumption of sulfurous fuel oils, thereby protecting the environment from emissions of sulfur and nitrogen oxides, as well revealing a great potential for the heat utilization of exhaust gases. The efficiency of utilization of exhaust gas heat in exhaust boilers (EGB) depends on their temperature at the outlet of EGB, id est. the depth of heat utilization. Exhaust gas temperature is limited by the rate of low-temperature corrosion (LTC), which reaches a level of 1.2 mm/year at the wall temperature of about 110 °C for the condensing heat exchange surfaces (HES) and reduces the reliability of the HES operation. Therefore, decreasing the corrosion rate of condensing HES at wall temperature below 110 °C to an acceptable level (about 0.2 mm/year) when undergoing WFE combustion will make it possible to reduce the exhaust gas temperature and, consequently, increase the efficiency of EGB and fuel saving during the operation of the ship power plant. The aim of the research is to assess improvements to the reliability, durability and efficient operation of condensing HES in marine EGB undergoing WFE combustion in a diesel engine based on experimental studies of the LTC process. A special experimental setup was developed for investigation. The use of WFE with a decreased wall temperature of HES below 80 to 70 °C would improve the reliability of the EGB along the accepted service life, increase the lifetime of the HES metal by almost six times as well as the overhaul period, and reduce the cost of repairing condensing HES. Furthermore, due to the reducing corrosion rate under WFE combustion, the application of low-temperature condensing HES makes it possible to enhance the efficiency of deeper exhaust gas heat utilization and provide sustainable efficient operation of a diesel engine plant on the whole at a safe thermal and environmentally friendly level.

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Section: Experimental Researchmentioning

confidence: 99%

“…The value of E i can be found from Equation (7). The value of E e can be found as the sum ∑ n i=1 E i .…”

Section: Influence Of Hes Metal Wall Temperature and Excess Air Coeff...mentioning

confidence: 99%

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Research of Exhaust Gas Boiler Heat Exchange Surfaces with Reduced Corrosion When Water-Fuel Emulsion Combustion

et al. 2022

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“…Additionally, CO formation phase is different between the two cycles, as shown in Figure 8 (obser more clearly in the shaded zone). This is mainly attributed to the evolution of operat points during the cycles: for example, from 600 to 650 s, the WHTC operates at sma engine loads (Figure 2) relative to RSRDC; thus, it emits more CO. As shown in Table 3, the catalyst is Pd/Pt (the relative ratio is 19:20) for DOC diesel engines, DOC can almost completely convert CO [44]). This grouping is good Therefore, even the difference in raw HC between the two cycles is large, and the difference in raw CO is small (Figures 3 and 8).…”

Section: Transient Emissions: Comentioning

confidence: 99%

“…As shown in Table 3, the catalyst is Pd/Pt (the relative ratio is 19:20) for DOC (for diesel engines, DOC can almost completely convert CO [44]). This grouping is good for CO conversion, because Pt can lower CO's light-off temperature [45] and Pd favors conversion under higher temperatures [46].…”

Section: Transient Emissions: Comentioning

confidence: 99%

A Comparative Investigation of the Emissions of a Heavy-Duty Diesel Engine under World Harmonized Transient Cycle and Road Spectrum Cycle

Deng,

Yu,

Zhou

et al. 2023

Energies

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In the present study, detailed comparative experiments on a heavy-duty diesel engine used in the world harmonized transient cycle (WHTC) and road spectrum reversely deduced cycle (RSRDC, which was derived from a road test) were carried out. Fuel consumption and gaseous and particulate pollutants, along with some engine operation parameters, were measured transiently; thus, specific emissions can be calculated. Results showed that the BSFC of WHTC and RSRDC was 201.8 and 210 g/kW·h, respectively, because the real road driving cycle (RSRDC) had wider operating point distributions and more points located in the low-efficiency zone relative to WHTC. Thus, WHTC operations exhibited higher raw CO (abundant CO formation needed a specific temperature threshold) and NOx but lower HC. Furthermore, with aftertreatment, all pollutants met the newest China regulation limit. Finally, transient emissions were analyzed in detail. Although the specific emissions of some pollutants were similar in value for both cycles, transient processes may largely be different. Therefore, the current study is meaningful, and we not only provide broad and detailed information but also directly compare two types of operations (one is a real road driving cycle) in the laboratory: this is rarely discussed in the literature.

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Effect of EGR on performance and emissions of a methanol–diesel reactivity controlled compression ignition (RCCI) engine

Huang,

Li,

Zhou

et al. 2023

J Braz. Soc. Mech. Sci. Eng.

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Effects of EGR combined with DOC on emission characteristics of a two-stage injected Fischer-Tropsch diesel/methanol dual-fuel engine

Cited by 22 publications

References 46 publications

Research of Exhaust Gas Boiler Heat Exchange Surfaces with Reduced Corrosion When Water-Fuel Emulsion Combustion

Research of Exhaust Gas Boiler Heat Exchange Surfaces with Reduced Corrosion When Water-Fuel Emulsion Combustion

A Comparative Investigation of the Emissions of a Heavy-Duty Diesel Engine under World Harmonized Transient Cycle and Road Spectrum Cycle

Effect of EGR on performance and emissions of a methanol–diesel reactivity controlled compression ignition (RCCI) engine

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