Journal of The Energy Institute最新文献

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Effects of dimethoxymethane and isopropanol blending on soot formation in ethylene and propane counterflow diffusion flames 二甲氧基甲烷和异丙醇混合对乙烯和丙烷逆流扩散火焰中烟尘形成的影响
IF 5.6 2区 工程技术
Journal of The Energy Institute Pub Date : 2024-08-30 DOI: 10.1016/j.joei.2024.101805
Lei Xu , Jincheng Yang , Xinkai Shen , Xutong Wu , Dong Liu
{"title":"Effects of dimethoxymethane and isopropanol blending on soot formation in ethylene and propane counterflow diffusion flames","authors":"Lei Xu ,&nbsp;Jincheng Yang ,&nbsp;Xinkai Shen ,&nbsp;Xutong Wu ,&nbsp;Dong Liu","doi":"10.1016/j.joei.2024.101805","DOIUrl":"10.1016/j.joei.2024.101805","url":null,"abstract":"<div><p>Introducing low-carbon oxygenated fuels into the current transport sector provides an effective pathway for mitigating the emissions of greenhouse gases and harmful pollutants such as soot. Previous studies have revealed that oxygenated fuels can reduce soot formation, but the soot-reduction potential is closely related to the chemical interaction between the oxygenates and the baseline hydrocarbons. This work is devoted to study the effects of blending dimethoxymethane (DMM) and isopropanol (IPA) on soot formation in ethylene-based and propane-based counterflow diffusion flames. Soot formation in the target flames was experimentally characterized using a planar light extinction technique, accompanied by numerical analysis to provide complementary insights. The results confirmed that the effects of blending oxygenates on soot formation are sensitive to the fuel-specific molecular structure of the oxygenates and hydrocarbons. For the C<sub>2</sub>H<sub>4</sub>-based flames, blending DMM and IPA could lead to a synergistic effect on soot formation due to chemical fuel interaction, with stronger synergy observed with IPA blending. In contrast, no evident synergistic effects on soot formation were observed in the C<sub>3</sub>H<sub>8</sub>-based flames, for which a notable soot reduction was observed with DMM blending. Reaction pathway analysis suggested that the occurrence of soot synergy in the C<sub>2</sub>H<sub>4</sub>-based flames is mainly due to the chemical interaction between the methyl radicals generated from DMM/IPA and the C<sub>2</sub> species from C<sub>2</sub>H<sub>4</sub>. This study is expected to deepen our understanding of the soot formation behavior of DMM- and IPA-blended flames, thus contributing to their successful usage as clean alternative fuels.</p></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"117 ","pages":"Article 101805"},"PeriodicalIF":5.6,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142122928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Experimental and numerical study of laminar burning velocity for Diisobutylene+ PRF/TRF mixtures 二异丁烯+ PRF/TRF 混合物层流燃烧速度的实验和数值研究
IF 5.6 2区 工程技术
Journal of The Energy Institute Pub Date : 2024-08-30 DOI: 10.1016/j.joei.2024.101802
Leilei Liu , Xinlu Han , Changhui Wang , Shuo Zhang , Hongqing Feng
{"title":"Experimental and numerical study of laminar burning velocity for Diisobutylene+ PRF/TRF mixtures","authors":"Leilei Liu ,&nbsp;Xinlu Han ,&nbsp;Changhui Wang ,&nbsp;Shuo Zhang ,&nbsp;Hongqing Feng","doi":"10.1016/j.joei.2024.101802","DOIUrl":"10.1016/j.joei.2024.101802","url":null,"abstract":"<div><p>DIB (Diisobutylene, JC<sub>8</sub>H<sub>16</sub>) strongly correlates with real gasoline and significantly impacts the combustion behavior of alternative fuels designed as gasoline substitutes. However, accuracy concerns persist in laminar burning velocity data reported in literature. In this paper, the laminar burning velocities of DIB + air, DIB + PRF + air, and DIB + TRF + air mixtures were measured by the heat flux method at 1 atm. (PRF, Primary Reference Fuel; TRF, Toluene Reference Fuel) The equivalence ratio was controlled within 0.6–1.3, and the initial temperatures were set at 298K, 318K, and 338K. Additionally, by employing the mechanism proposed by Ren et al., the simulated values align with the experimental data, thus prompting the conduction of a reaction kinetic analysis. The analysis of chemical reaction kinetics reveals the reaction pathways of DIB, with a notable observation that an increase in temperature or a decrease in equivalence ratio can both lead to an elevation in the degree of unsaturation in the bonds of intermediate species. During laminar flame combustion, PRF and TRF compete with DIB for oxygen, with PRF appearing to have a stronger ability to capture oxygen. In addition, the laminar burning velocity temperature dependence coefficient α decreases first and then increases with the increase of the equivalence ratio, where the minimum α is obtained at equivalence ratio = 1.1. Additionally, the laminar burning velocity at higher initial temperatures is estimated by the extrapolation method and compared with the experimental data reported in literature.</p></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"117 ","pages":"Article 101802"},"PeriodicalIF":5.6,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142098659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Towards enhanced monocyclic aromatic hydrocarbons production from Co-pyrolysis of biomass and waste polystyrene plastic 提高生物质与废聚苯乙烯塑料共热解生产单环芳烃的能力
IF 5.6 2区 工程技术
Journal of The Energy Institute Pub Date : 2024-08-30 DOI: 10.1016/j.joei.2024.101812
Zhiwei Wang , Shuaihua Guo , Gaofeng Chen , Zaifeng Li , Mengge Wu , Yan Chen , Tingzhou Lei , Kiran G. Burra , Ashwani K. Gupta
{"title":"Towards enhanced monocyclic aromatic hydrocarbons production from Co-pyrolysis of biomass and waste polystyrene plastic","authors":"Zhiwei Wang ,&nbsp;Shuaihua Guo ,&nbsp;Gaofeng Chen ,&nbsp;Zaifeng Li ,&nbsp;Mengge Wu ,&nbsp;Yan Chen ,&nbsp;Tingzhou Lei ,&nbsp;Kiran G. Burra ,&nbsp;Ashwani K. Gupta","doi":"10.1016/j.joei.2024.101812","DOIUrl":"10.1016/j.joei.2024.101812","url":null,"abstract":"<div><p>Co-pyrolysis technology offers a viable solution for utilizing biomass and waste plastics as a valuable energy resource, to support waste management, energy supply and environmental protection. In this paper, co-pyrolysis of poplar tree (PT) and polystyrene (PS) at mixture ratios of 0:1, 3:1, 2:1, 1:1, 1:2, 1:3 and 1:0 under different pyrolysis temperatures (450, 550, 650, and 700 °C), using different catalysts (HZSM-5, MCM-41, Fe/HZSM-5, and Cu/HZSM-5) were investigated using gas chromatography/mass spectrometry (Py-GC/MS) diagnostics for determining products distribution and synergistic effects. The results showed that PT performed best at a pyrolysis temperature of 650 °C, whereas PS performed best at 550 °C. The relative amount of aromatics in the co-pyrolysis products of PT and PS was highest at 550 °C that showed positive synergistic effects. The synergistic effects from the co-pyrolysis of PT and PS were significantly different at different mixture ratios of the PT and PS feedstocks. At mixture ratios of 1:1 and 1:2, the relative amounts of polycyclic aromatic hydrocarbons (PAHs) and monocyclic aromatic hydrocarbons (MAH) were higher and showed positive synergistic effects. The catalysts promoted the generation of MAH and inhibited the PAHs formation in the co-pyrolysis. The Fe/HZSM-5 catalyst provided the most significant effect on MAH showing the highest relative amounts. The results showed that highest yield of monocyclic aromatic hydrocarbons can be achieved from the pyrolysis of PT and PS materials at 1:1 mixture ratio using Fe/HZSM-5 catalyst, at a reaction temperature of 550 °C.</p></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"117 ","pages":"Article 101812"},"PeriodicalIF":5.6,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142149444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
One-step synthesis of Pt@(CrMnFeCoNi)3O4 high entropy oxide catalysts through flame spray pyrolysis 通过火焰喷射热解一步合成 Pt@(CrMnFeCoNi)3O4高熵氧化物催化剂
IF 5.6 2区 工程技术
Journal of The Energy Institute Pub Date : 2024-08-30 DOI: 10.1016/j.joei.2024.101804
Haonan Zheng , Yiran Zhang , Zibo Xu , Guangzhao Zhou , Xuteng Zhao , Zhen Huang , He Lin
{"title":"One-step synthesis of Pt@(CrMnFeCoNi)3O4 high entropy oxide catalysts through flame spray pyrolysis","authors":"Haonan Zheng ,&nbsp;Yiran Zhang ,&nbsp;Zibo Xu ,&nbsp;Guangzhao Zhou ,&nbsp;Xuteng Zhao ,&nbsp;Zhen Huang ,&nbsp;He Lin","doi":"10.1016/j.joei.2024.101804","DOIUrl":"10.1016/j.joei.2024.101804","url":null,"abstract":"<div><p>High entropy oxides (HEOs) show great prospects in catalysis owing to their widely tunable component structures and ease of combination with active metals. However, the development of HEO catalysts is limited by the lack of efficient synthesis methods due to the difficulty of homogeneously mixing at least five elements. In this work, flame spray pyrolysis (FSP) is successfully employed to synthesize (CrMnFeCoNi)<sub>3</sub>O<sub>4</sub> HEO with a single phase spinel structure in one step, which is verified by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), selected area electron diffraction (SAED), and energy-dispersive X-ray spectroscopy (EDS). Taking CO catalytic oxidation as a probe reaction, the Pt@(CrMnFeCoNi)<sub>3</sub>O<sub>4</sub> HEO catalyst synthesized by FSP in one step is compared with the catalyst whose Pt is impregnated on (CrMnFeCoNi)<sub>3</sub>O<sub>4</sub> HEO support. The FSP-made catalysts have a higher catalytic reaction rate and better redox ability, which lowers the temperature of complete CO conversion by nearly 100 °C. Furthermore, it can be observed that the flame parameters can be optimized to modify the particle size and oxygen vacancies of the HEO nanoparticles, thus enhancing the catalytic performances. This work demonstrates that FSP is an effective method for the one-step synthesis of HEO catalysts with excellent catalytic performance, providing a new perspective for the synthesis of HEO-based materials.</p></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"117 ","pages":"Article 101804"},"PeriodicalIF":5.6,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142098657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mechanistic analysis of hydrogen-rich Co-gasification of pine wood and polypropylene-based waste masks using Fe/Dol catalyst 使用 Fe/Dol 催化剂对松木和聚丙烯基废弃掩模进行富氢共气化的机理分析
IF 5.6 2区 工程技术
Journal of The Energy Institute Pub Date : 2024-08-30 DOI: 10.1016/j.joei.2024.101801
Yong-hong Niu , Zheng-yang Chi , Zhi-qiang Wang , Man Yang , Feng-tao Han
{"title":"Mechanistic analysis of hydrogen-rich Co-gasification of pine wood and polypropylene-based waste masks using Fe/Dol catalyst","authors":"Yong-hong Niu ,&nbsp;Zheng-yang Chi ,&nbsp;Zhi-qiang Wang ,&nbsp;Man Yang ,&nbsp;Feng-tao Han","doi":"10.1016/j.joei.2024.101801","DOIUrl":"10.1016/j.joei.2024.101801","url":null,"abstract":"<div><p>Disposable masks, predominantly made of polypropylene melt-blown fabric, present a significant environmental challenge due to their large volume and resistance to natural degradation. This study explores the co-gasification of forestry waste, specifically pine wood, and waste masks to enhance biomass gasification efficiency while enabling the high-value utilization of waste materials. The Fe/Dol catalyst, prepared by loading transition metal Fe onto calcined dolomite using the impregnation method, was tested in a two-stage fixed-bed gasification system. Steam was employed as the gasifying agent. The study systematically examines the effects of steam flow rate, gasification reforming temperature, the mixing ratio of pine wood to masks, and Fe loading on the catalyst's performance in gas-phase and liquid-phase product formation.Characterization analyses revealed that Fe oxides facilitate the cleavage of aromatic rings in aromatic compounds, leading to the formation of two-carbon chain segments and promoting the production of ethylene and propylene from aliphatic hydrocarbons. Additionally, the catalyst enhanced tar cracking, generating free radicals and ring bonds. Experimental results indicate that at a steam flow rate of 3 mg/min, a gasification temperature of 850 °C, a pine wood to mask mixing ratio of 1:2, and an Fe loading of 8 %, the hydrogen (H<sub>2</sub>) volume fraction reached 52.48 %, with a gas yield of 1.67 m³/kg and a hydrogen production rate of 78.25 g/kg.</p></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"117 ","pages":"Article 101801"},"PeriodicalIF":5.6,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142098658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Numerical investigation and optimization of the ammonia/diesel dual fuel engine combustion under high ammonia substitution ratio 高氨替代率下氨/柴油双燃料发动机燃烧的数值研究与优化
IF 5.6 2区 工程技术
Journal of The Energy Institute Pub Date : 2024-08-20 DOI: 10.1016/j.joei.2024.101797
Shouzhen Zhang, Qinglong Tang, Haifeng Liu, Rui Yang, Mingfa Yao
{"title":"Numerical investigation and optimization of the ammonia/diesel dual fuel engine combustion under high ammonia substitution ratio","authors":"Shouzhen Zhang,&nbsp;Qinglong Tang,&nbsp;Haifeng Liu,&nbsp;Rui Yang,&nbsp;Mingfa Yao","doi":"10.1016/j.joei.2024.101797","DOIUrl":"10.1016/j.joei.2024.101797","url":null,"abstract":"<div><p>This study investigated the effects of initial temperature, equivalence ratio, and diesel injection timing on engine combustion and emission characteristics at high ammonia substitution ratios. Increased compression temperature and pressure significantly reduce ignition delay, enhance combustion speed and efficiency, and decrease N<sub>2</sub>O and unburned NH<sub>3</sub> emissions. A strong correlation exists between the amount of N<sub>2</sub>O produced and the mass of unburned NH<sub>3</sub> when ammonia combustion efficiency is high. The N<sub>2</sub>O distribution is concentrated near the cylinder walls and the piston top surface, in areas with high concentrations of unburned NH<sub>3</sub>. As the equivalence ratio increases from 0.6 to 0.75, flame propagation speed and indicated thermal efficiency (ITE) increase, while NOx, N<sub>2</sub>O, and unburned NH<sub>3</sub> emissions decrease. The combustion performance and emissions were optimized by advancing the diesel injection timing and increasing the equivalence ratio to accelerate the combustion speed. This adjustment increases ITE to 47.6 % at an 80 % ammonia energy ratio. Post-optimization results show a reduction in unburned NH<sub>3</sub> emissions from 51.7 g/kW·h to 5.9 g/kW·h and a decrease in N<sub>2</sub>O emissions from 0.930 g/kW·h to 0.370 g/kW·h, culminating in a 60.4 % reduction in greenhouse gas (GHG) emissions.</p></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"117 ","pages":"Article 101797"},"PeriodicalIF":5.6,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142012637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Micropore effects on coal pyrolysis process investigated by using reactive molecular dynamics 利用反应分子动力学研究微孔对煤热解过程的影响
IF 5.6 2区 工程技术
Journal of The Energy Institute Pub Date : 2024-08-18 DOI: 10.1016/j.joei.2024.101798
Mo Zheng , Xiaoxia Li
{"title":"Micropore effects on coal pyrolysis process investigated by using reactive molecular dynamics","authors":"Mo Zheng ,&nbsp;Xiaoxia Li","doi":"10.1016/j.joei.2024.101798","DOIUrl":"10.1016/j.joei.2024.101798","url":null,"abstract":"<div><p>The micropore structure can serve as the diffusion channels for intermediates and light tar products during coal pyrolysis, which is very important for modulating the desired tar or char products. In this work, the micropore effects on product distribution and the reaction mechanisms during Hailaer coal pyrolysis was explored for the first time from the atomistic simulation point of view by using large-scale ReaxFF MD simulation and the reasonable model with the artificially adding micropore strategy. The results suggest that the micropore structure indeed has a significant impact on the major tar product distribution and competitive reactions during coal pyrolysis process at high temperature. The micropore can promote decomposition reactions through accelerating C–C bond breaking significantly and inhibit the recombination reactions accompanied with the char formation with more carbon in <em>sp2</em> structure. Based on the oxygen-containing bond behaviors in char products obtained from coal pyrolysis process, it is unraveled that the more micropore exits in coal structure, the more C<sub><em>sp3</em></sub>-O bonds and less C<sub><em>sp2</em></sub>-O bonds in char precursors. Particularly, the light tar products with ring groups are more influenced by micorpore structures than those chain products. Considering that the limitation of current experimental techniques in micropore detection, the strategy sheds new light on the depth investigation of micropore effects on reactions, which can provide complement for experimental observations and tar product modulation.</p></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"117 ","pages":"Article 101798"},"PeriodicalIF":5.6,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142002457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
CFD modeling investigation of oxy-fuel combustion application in an industrial-scale FCC regenerator 全氧燃烧在工业规模催化裂化再生器中应用的 CFD 建模研究
IF 5.6 2区 工程技术
Journal of The Energy Institute Pub Date : 2024-08-16 DOI: 10.1016/j.joei.2024.101796
Yuneng Tang , Cheng Liu , Shibo Kuang , Qianqian Liu , Zhenyu Chen , Haitao Song , Bin Su , Jianglong Yu , Lian Zhang , Baiqian Dai
{"title":"CFD modeling investigation of oxy-fuel combustion application in an industrial-scale FCC regenerator","authors":"Yuneng Tang ,&nbsp;Cheng Liu ,&nbsp;Shibo Kuang ,&nbsp;Qianqian Liu ,&nbsp;Zhenyu Chen ,&nbsp;Haitao Song ,&nbsp;Bin Su ,&nbsp;Jianglong Yu ,&nbsp;Lian Zhang ,&nbsp;Baiqian Dai","doi":"10.1016/j.joei.2024.101796","DOIUrl":"10.1016/j.joei.2024.101796","url":null,"abstract":"<div><p>The increase in atmospheric CO<sub>2</sub> concentration and its consequential impact on climate change have elicited increased public concern. The refinery units including fluid catalytic cracking (FCC) generate substantial quantities of CO<sub>2</sub>. To mitigate the emission from the FCC process, oxy-fuel combustion has emerged as a prospective carbon capture and storage technology. This study presents the first trial for the modeling investigation of a 70 kt/a industrial FCC regenerator under the scenario of retrofitting it with oxy-fuel combustion technology. Employing the Eulerian-Eulerian model, a CFD model integrating heat transfer and coke combustion reactions has been established. The detailed hydrodynamics, temperature, and species concentration distribution inside the regenerator are obtained under both air-firing and oxy-firing conditions, which are further compared to exploit the possibility of oxy-fuel combustion retrofitting. As has been found, decreases in gas temperature and carbon conversion rate were observed for 21 % O<sub>2</sub>/79 % CO<sub>2</sub> atmosphere in comparison to the air reference case due to the differences in gas properties between N<sub>2</sub> and CO<sub>2</sub>. This discrepancy resulted in a drop of 17 K in dilute phase temperature and 2 K in dense phase temperature. The bed density also exhibited a large with the oxy-firing conditions, with notable observations revealing a lower bed density below a height of 4.2 m, transitioning to a higher density above said height. Sensitivity analysis was also conducted for three principal operating parameters, including superficial gas velocity, oxygen partial pressure, and catalyst circulation rate. An increase of oxygen partial pressure to 27 % or a decrease of the catalyst circulation rate to 20.7 kg/s proved effective in achieving the same temperature profile and even a slightly better carbon conversion in comparison to air-firing regeneration.</p></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"117 ","pages":"Article 101796"},"PeriodicalIF":5.6,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1743967124002745/pdfft?md5=77501723c00248837cf95df95dc49662&pid=1-s2.0-S1743967124002745-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142040593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Oxy-fuel co-combustion properties and N-containing pollutants release characteristics of biomass/coal blends 生物质/煤混合物的氧气-燃料共燃特性和含氮化合物的释放特性
IF 5.6 2区 工程技术
Journal of The Energy Institute Pub Date : 2024-08-16 DOI: 10.1016/j.joei.2024.101800
Jiangang Huang , Jinzhi Zhang , Tianju Chen , Dominic Yellezuome , Ruidong Zhao , Jinhu Wu
{"title":"Oxy-fuel co-combustion properties and N-containing pollutants release characteristics of biomass/coal blends","authors":"Jiangang Huang ,&nbsp;Jinzhi Zhang ,&nbsp;Tianju Chen ,&nbsp;Dominic Yellezuome ,&nbsp;Ruidong Zhao ,&nbsp;Jinhu Wu","doi":"10.1016/j.joei.2024.101800","DOIUrl":"10.1016/j.joei.2024.101800","url":null,"abstract":"<div><p>Thermal properties and NO release characteristics during oxy-fuel co-combustion of pine sawdust (PS) and Shenmu coal (SM) were investigated based on the effects of various parameters, including atmosphere, temperature, blending ratio, and oxygen concentration in this research. The results indicate that the release of NO decreased with the increasing temperature during decomposition process of PS and SM. The content of N-Q and N-X in semicoke (SC) increased at higher torrefaction temperature. The N-Q and N-X content for SC at the temperature of 1000 °C was 36.9 % and 23.2 %, respectively. When 40 % PS was added to the SM, the NO release amount was significantly reduced by 16.3–23.1 % in the oxy-fuel atmosphere compared to the O<sub>2</sub>/N<sub>2</sub> atmosphere, and the ignition time was reduced from 4.0s to 0.66s. The NO emission initially increased and then decreased as the combustion temperature increased from 800 to 1000 °C. Furthermore, increasing the oxygen concentration from 10 % to 40 % shortens the combustion time and increases the emissions of NO. Conversely, increasing PS blending ratios from 10 % to 40 % decreased NO emission and the conversion ratio. These findings emphasize that adding biomass can effectively improve coal ignition, increase combustion rates, reduce NO emissions, and address the air pollution problems associated with NOx emissions.</p></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"117 ","pages":"Article 101800"},"PeriodicalIF":5.6,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142007115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Laser ignition on single droplet characteristics of aviation kerosene at different pressures and initial diameters: ignition, combustion and micro-explosion 不同压力和初始直径下航空煤油单液滴特性的激光点火:点火、燃烧和微爆炸
IF 5.6 2区 工程技术
Journal of The Energy Institute Pub Date : 2024-08-16 DOI: 10.1016/j.joei.2024.101799
Yang Yi , Senlin Lv , Erjiang Hu , Geyuan Yin , Yingjia Zhang , Zuohua Huang , Yingwen Yan
{"title":"Laser ignition on single droplet characteristics of aviation kerosene at different pressures and initial diameters: ignition, combustion and micro-explosion","authors":"Yang Yi ,&nbsp;Senlin Lv ,&nbsp;Erjiang Hu ,&nbsp;Geyuan Yin ,&nbsp;Yingjia Zhang ,&nbsp;Zuohua Huang ,&nbsp;Yingwen Yan","doi":"10.1016/j.joei.2024.101799","DOIUrl":"10.1016/j.joei.2024.101799","url":null,"abstract":"<div><p>In this study, an experimental system for single-droplet ignition by laser under different pressures is established, and the laser ignition is used to examine how pressure and initial diameter influence ignition properties of RP-3 aviation kerosene single-droplet. The findings reveal that depending on the extent of the impact of bubble rupture on the droplet's shape, The droplet's morphological alterations can be classified into three types: micro-expansion, puffing, and micro-explosion. The ignition and combustion of droplets is segmented into four distinct phases: heating, ignition, intense combustion, boiling combustion. The flame width diminishes with rising pressure. Single droplet ignition delay time is strongly influenced by the pressure, which is reduced by 92.7 %, 94.1 % and 94.3 % for the three droplets from small to large diameters with the pressure increases from 1 bar to 4 bar. The change trends of droplet diameters are first increasing and then decreasing. The whole burning rate of RP-3 droplets goes up with the rise of pressure. A droplet laser ignition model is proposed, the minimum ignition energy of RP-3 droplets with an initial diameter of 1.42 mm at pressures of 1–4 bar are obtained to be 0.88 J, 0.80 J, 0.68 J, and 0.59 J, respectively.</p></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"117 ","pages":"Article 101799"},"PeriodicalIF":5.6,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142058382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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