Combined effects of intake oxygen enrichment, intake pressure and temperature on combustion behavior and emission characteristics of a small-scaled rotary engine

Zou, Run; Liu, Jinxiang; Wang, Nana; Jiao, Huichao

doi:10.1016/j.applthermaleng.2022.118096

Cited by 24 publications

(2 citation statements)

References 48 publications

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“…It is typically accepted that the increasing time of air intake commonly refers to oxygen enrichment. When more air was supplied to the combustion chamber, the exothermic combustion reactions of the fuel wood were accelerated, leading to the rapid flame propagation and heat release rate during the experiment [19,20]. The high heat release could transfer to the pyrolysis chamber through convection, and hence the temperature in the pyrolysis chamber might increase slightly, resulting in less biochar yield.…”

Section: Biochar Yieldmentioning

confidence: 99%

Feasibility study of coconut shell biochar production using community-scale biochar kiln

et al. 2023

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The enormous coconut shell waste from local farmers and manufacturers has caused negative environmental and economic impacts in Thailand. A low-cost, small-scale pyrolysis kiln comprised of a cylindrical tank, gas circulating pipes, a kiln stand, and a manual drum lever was constructed and used to produce biochar from coconut shells in this study. The air intake and holding times for the biochar production process were varied. The biochar yield was 30.67% to 36.22%, or 4.6 kg to 5.4 kg per day per unit. The biochar porosity and fixed carbon content increased as the air intake and holding times were increased. The BET surface areas were 7.54 m²∙g-1 to 63.17 m²∙g-1. The pH values of biochar were alkaline, in the range of 7.34 to 10.24. Therefore, biochar can be used as a soil amendment material. The Net Present Value (NPV), the Internal Rate of Return (IRR), and the payback period are 52,757 THB (1,459.79 USD), 18.71%, 4 years, 10 months, and 27 days, respectively. According to economic analysis, investing in coconut shell biochar production under optimal conditions using the developed kiln is acceptable and can be viewed as a potential approach to providing additional economic benefits for coconut-based enterprises and the Thai community.

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Section: Biochar Yieldmentioning

confidence: 99%

Feasibility study of coconut shell biochar production using community-scale biochar kiln

et al. 2023

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“…The level of oxygen in the oxidant has a significant impact on the rate of combustion reactions, flame size, and can even influence the reaction products. [ 21 ] Nemitallah et al [ 22 ] conducted experimental and numerical investigations on diffusion oxy‐combustion flames in gas turbines. The findings revealed that an increase in the oxygen level in the oxidant (ranging from 30% to 60%) results in higher laminar flame speeds and reduced CO 2 emissions in the exhaust gas.…”

Section: Introductionmentioning

confidence: 99%

Effects of Hydrogen Addition, Oxygen Level, and Strain Rate on Combustion Characteristics of CH₄/H₂ in Staged MILD Combustion

Zhang,

Liu,

Huang

et al. 2023

Energy Tech

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In this article, the effects of hydrogenation amount (0–80%), oxygen content (14–18%), and strain rate (10–1000 s−1) on the emission characteristics of NO and CO in moderate or intense low‐oxygen dilution (MILD) fractional combustion are studied under the actual working conditions of gas turbine (T = 723 K, P = 16.5 atm). The pathway of NO and CO production and the reaction with the greatest influence on their emissions are analyzed. In the findings, it is indicated that NO emissions are suppressed at lower hydrogen levels, while the addition of hydrogen leads to a decrease in CO emissions. Specifically, the key reaction for NO formation is H + NO + M = HNO + M, whereas CO emissions are primarily controlled by the direct reaction OH + CO = H + CO2. Furthermore, the reduction of oxygen levels effectively suppresses NO and CO emissions during MILD combustion. The variation in oxygen level exerts the greatest influence on the reaction rate of the NNH pathway. High concentrations of O2 are identified as the primary cause of elevated CO levels in MILD combustion. Finally, elevating the strain rate in MILD combustion demonstrates a mitigating effect on NO and CO emissions.

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Effect of recess shape on combustion performance and knocking characteristics for a downsized gasoline rotary engine

Zou

Liu²,

Wang³

2022

Applied Thermal Engineering

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Combined effects of intake oxygen enrichment, intake pressure and temperature on combustion behavior and emission characteristics of a small-scaled rotary engine

Cited by 24 publications

References 48 publications

Feasibility study of coconut shell biochar production using community-scale biochar kiln

Feasibility study of coconut shell biochar production using community-scale biochar kiln

Effects of Hydrogen Addition, Oxygen Level, and Strain Rate on Combustion Characteristics of CH₄/H₂ in Staged MILD Combustion

Effect of recess shape on combustion performance and knocking characteristics for a downsized gasoline rotary engine

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Combined effects of intake oxygen enrichment, intake pressure and temperature on combustion behavior and emission characteristics of a small-scaled rotary engine

Cited by 24 publications

References 48 publications

Feasibility study of coconut shell biochar production using community-scale biochar kiln

Feasibility study of coconut shell biochar production using community-scale biochar kiln

Effects of Hydrogen Addition, Oxygen Level, and Strain Rate on Combustion Characteristics of CH4/H2 in Staged MILD Combustion

Effect of recess shape on combustion performance and knocking characteristics for a downsized gasoline rotary engine

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Effects of Hydrogen Addition, Oxygen Level, and Strain Rate on Combustion Characteristics of CH₄/H₂ in Staged MILD Combustion