{"title":"不同温度下几种合成气成分的层燃速度峰值研究","authors":"","doi":"10.1016/j.joei.2024.101816","DOIUrl":null,"url":null,"abstract":"<div><p>In the context of the current energy transition, the use of biomass-derived syngas (BDS) is often recognized as a fundamental path towards decreasing fossil fuel dependency and greenhouse gas emissions. However, hydrogen-containing BDS are prone to flame instability problems. More efforts are being carried out aiming at efficiently adopting BDS in industrial combustors with CH<sub>4</sub> co-firing or inert gas dilutions by exploring accurate knowledge of burning velocity. To do so, a deeper knowledge of the syngas combustion behaviour is strictly necessary. The objective of this study fits in this framework: in particular, a computational study has been carried out to evaluate kinetic models and present fresh insights on the effects of varying syngas mixtures such as CO/H<sub>2</sub>, CO/H<sub>2</sub>/CO<sub>2</sub> and CO/H<sub>2</sub>/CH<sub>4</sub> on Laminar Burning Velocity (LBV) and peak LBV location <span><math><mrow><mrow><mo>(</mo><msub><mi>Φ</mi><mrow><mi>L</mi><mi>B</mi><mi>V</mi><mo>=</mo><mi>max</mi></mrow></msub><mo>)</mo></mrow></mrow></math></span>. In-detail chemical kinetic simulations of equimolar (CO: H<sub>2</sub> = 1:1) forestry waste syngas were systematically carried out taking advantage of the open-source CANTERA solver. Three detailed kinetic models i.e., newly released FFCM-2, USC mech II, and modified GRI mech III were implemented to report accurate flame parameters at 1 bar and different temperature levels (from 300 K up to 450 K). On comparing the results with experiments, FFCM-2 proved to be a good kinetic model for the considered syngas mixtures CO/H<sub>2</sub>, CO/H<sub>2</sub>/CO<sub>2</sub> and especially for CO/H<sub>2</sub>/CH<sub>4</sub> for mixtures containing a limited share of 30 % methane at normal and moderately elevated temperature at 0.4 ≤ <strong><em>Φ</em></strong> ≤ 2.1. The USC mech II performed very well for CO/H<sub>2</sub>, and CO/H<sub>2</sub>/CO<sub>2</sub>, while the modified GRI mech III model also gave agreeable predictions for CO/H<sub>2</sub>/CH<sub>4</sub> mixture having rich methane content. Additionally, when varying syngas composition analysis was conducted at different temperatures, the progressive CO<sub>2</sub> dilution and CH<sub>4</sub> addition of up to 30 % reduced the peak LBV and moved the peak LBV locations <span><math><mrow><mrow><mo>(</mo><msub><mi>Φ</mi><mrow><mi>L</mi><mi>B</mi><mi>V</mi><mo>=</mo><mi>max</mi></mrow></msub><mo>)</mo></mrow></mrow></math></span> towards lean ER conditions with 9 % and 40 % reductions, respectively; however, only the latter effect was enhanced at the elevated initial temperature. Furthermore, sensitivity analysis of respective syngas mixtures is reported at normal and elevated temperatures to explore the most sensitive intermediate reactions relative to LBV. The shift of peak LBV locations and their enhancement at elevated temperatures also open the research path to study the underlying impacts on the flame modes/regimes and structure, especially CO emissions pathways in syngas with 30 % of CH<sub>4</sub> and CO<sub>2</sub> additions.</p></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":null,"pages":null},"PeriodicalIF":5.6000,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1743967124002940/pdfft?md5=dc41ff5f8d5fb107f29d56f1c1edab04&pid=1-s2.0-S1743967124002940-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Study of peak Laminar Burning Velocity of several syngas compositions at different temperatures\",\"authors\":\"\",\"doi\":\"10.1016/j.joei.2024.101816\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>In the context of the current energy transition, the use of biomass-derived syngas (BDS) is often recognized as a fundamental path towards decreasing fossil fuel dependency and greenhouse gas emissions. However, hydrogen-containing BDS are prone to flame instability problems. More efforts are being carried out aiming at efficiently adopting BDS in industrial combustors with CH<sub>4</sub> co-firing or inert gas dilutions by exploring accurate knowledge of burning velocity. To do so, a deeper knowledge of the syngas combustion behaviour is strictly necessary. The objective of this study fits in this framework: in particular, a computational study has been carried out to evaluate kinetic models and present fresh insights on the effects of varying syngas mixtures such as CO/H<sub>2</sub>, CO/H<sub>2</sub>/CO<sub>2</sub> and CO/H<sub>2</sub>/CH<sub>4</sub> on Laminar Burning Velocity (LBV) and peak LBV location <span><math><mrow><mrow><mo>(</mo><msub><mi>Φ</mi><mrow><mi>L</mi><mi>B</mi><mi>V</mi><mo>=</mo><mi>max</mi></mrow></msub><mo>)</mo></mrow></mrow></math></span>. In-detail chemical kinetic simulations of equimolar (CO: H<sub>2</sub> = 1:1) forestry waste syngas were systematically carried out taking advantage of the open-source CANTERA solver. Three detailed kinetic models i.e., newly released FFCM-2, USC mech II, and modified GRI mech III were implemented to report accurate flame parameters at 1 bar and different temperature levels (from 300 K up to 450 K). On comparing the results with experiments, FFCM-2 proved to be a good kinetic model for the considered syngas mixtures CO/H<sub>2</sub>, CO/H<sub>2</sub>/CO<sub>2</sub> and especially for CO/H<sub>2</sub>/CH<sub>4</sub> for mixtures containing a limited share of 30 % methane at normal and moderately elevated temperature at 0.4 ≤ <strong><em>Φ</em></strong> ≤ 2.1. The USC mech II performed very well for CO/H<sub>2</sub>, and CO/H<sub>2</sub>/CO<sub>2</sub>, while the modified GRI mech III model also gave agreeable predictions for CO/H<sub>2</sub>/CH<sub>4</sub> mixture having rich methane content. Additionally, when varying syngas composition analysis was conducted at different temperatures, the progressive CO<sub>2</sub> dilution and CH<sub>4</sub> addition of up to 30 % reduced the peak LBV and moved the peak LBV locations <span><math><mrow><mrow><mo>(</mo><msub><mi>Φ</mi><mrow><mi>L</mi><mi>B</mi><mi>V</mi><mo>=</mo><mi>max</mi></mrow></msub><mo>)</mo></mrow></mrow></math></span> towards lean ER conditions with 9 % and 40 % reductions, respectively; however, only the latter effect was enhanced at the elevated initial temperature. Furthermore, sensitivity analysis of respective syngas mixtures is reported at normal and elevated temperatures to explore the most sensitive intermediate reactions relative to LBV. The shift of peak LBV locations and their enhancement at elevated temperatures also open the research path to study the underlying impacts on the flame modes/regimes and structure, especially CO emissions pathways in syngas with 30 % of CH<sub>4</sub> and CO<sub>2</sub> additions.</p></div>\",\"PeriodicalId\":17287,\"journal\":{\"name\":\"Journal of The Energy Institute\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":5.6000,\"publicationDate\":\"2024-09-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S1743967124002940/pdfft?md5=dc41ff5f8d5fb107f29d56f1c1edab04&pid=1-s2.0-S1743967124002940-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of The Energy Institute\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1743967124002940\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENERGY & FUELS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of The Energy Institute","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1743967124002940","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
Study of peak Laminar Burning Velocity of several syngas compositions at different temperatures
In the context of the current energy transition, the use of biomass-derived syngas (BDS) is often recognized as a fundamental path towards decreasing fossil fuel dependency and greenhouse gas emissions. However, hydrogen-containing BDS are prone to flame instability problems. More efforts are being carried out aiming at efficiently adopting BDS in industrial combustors with CH4 co-firing or inert gas dilutions by exploring accurate knowledge of burning velocity. To do so, a deeper knowledge of the syngas combustion behaviour is strictly necessary. The objective of this study fits in this framework: in particular, a computational study has been carried out to evaluate kinetic models and present fresh insights on the effects of varying syngas mixtures such as CO/H2, CO/H2/CO2 and CO/H2/CH4 on Laminar Burning Velocity (LBV) and peak LBV location . In-detail chemical kinetic simulations of equimolar (CO: H2 = 1:1) forestry waste syngas were systematically carried out taking advantage of the open-source CANTERA solver. Three detailed kinetic models i.e., newly released FFCM-2, USC mech II, and modified GRI mech III were implemented to report accurate flame parameters at 1 bar and different temperature levels (from 300 K up to 450 K). On comparing the results with experiments, FFCM-2 proved to be a good kinetic model for the considered syngas mixtures CO/H2, CO/H2/CO2 and especially for CO/H2/CH4 for mixtures containing a limited share of 30 % methane at normal and moderately elevated temperature at 0.4 ≤ Φ ≤ 2.1. The USC mech II performed very well for CO/H2, and CO/H2/CO2, while the modified GRI mech III model also gave agreeable predictions for CO/H2/CH4 mixture having rich methane content. Additionally, when varying syngas composition analysis was conducted at different temperatures, the progressive CO2 dilution and CH4 addition of up to 30 % reduced the peak LBV and moved the peak LBV locations towards lean ER conditions with 9 % and 40 % reductions, respectively; however, only the latter effect was enhanced at the elevated initial temperature. Furthermore, sensitivity analysis of respective syngas mixtures is reported at normal and elevated temperatures to explore the most sensitive intermediate reactions relative to LBV. The shift of peak LBV locations and their enhancement at elevated temperatures also open the research path to study the underlying impacts on the flame modes/regimes and structure, especially CO emissions pathways in syngas with 30 % of CH4 and CO2 additions.
期刊介绍:
The Journal of the Energy Institute provides peer reviewed coverage of original high quality research on energy, engineering and technology.The coverage is broad and the main areas of interest include:
Combustion engineering and associated technologies; process heating; power generation; engines and propulsion; emissions and environmental pollution control; clean coal technologies; carbon abatement technologies
Emissions and environmental pollution control; safety and hazards;
Clean coal technologies; carbon abatement technologies, including carbon capture and storage, CCS;
Petroleum engineering and fuel quality, including storage and transport
Alternative energy sources; biomass utilisation and biomass conversion technologies; energy from waste, incineration and recycling
Energy conversion, energy recovery and energy efficiency; space heating, fuel cells, heat pumps and cooling systems
Energy storage
The journal''s coverage reflects changes in energy technology that result from the transition to more efficient energy production and end use together with reduced carbon emission.