Fuel Processing Technology最新文献_第4页

Isolating the influence of exhaust gas recirculation on the ignition and combustion reaction for combustion control of polyoxymethylene dimethyl ethers (PODEn)/gasoline under various fuel distribution conditions 分离废气再循环对聚氧二甲基醚(PODEn)/汽油在不同燃料分配条件下的点火和燃烧反应的影响，进行燃烧控制

IF 7.2 2区工程技术

Fuel Processing Technology Pub Date : 2025-05-01 DOI: 10.1016/j.fuproc.2025.108226

Huiquan Duan , Wei Cao , Chongchong Ren , Min Liu , Shuzhan Bai , Guoxiang Li

{"title":"Isolating the influence of exhaust gas recirculation on the ignition and combustion reaction for combustion control of polyoxymethylene dimethyl ethers (PODEn)/gasoline under various fuel distribution conditions","authors":"Huiquan Duan , Wei Cao , Chongchong Ren , Min Liu , Shuzhan Bai , Guoxiang Li","doi":"10.1016/j.fuproc.2025.108226","DOIUrl":"10.1016/j.fuproc.2025.108226","url":null,"abstract":"<div><div>Using exhaust gas recirculation (EGR) is a potential way to modulate the combustion process and improve the performance of a compression-ignition engine. In this study, the influence of EGR on the ignition and combustion reaction of polyoxymethylene dimethyl ethers (PODE<sub>n</sub>) as a gasoline-doped fuel was isolated for combustion control under various fuel distribution conditions, including fuel homogeneous, concentration-stratification, and reactivity-stratification conditions. In addition, the effect of EGR on engine performance was also isolated from CA50 (50 % burn point). The results indicated that for P20G80 (blend of 20 % PODE<sub>n</sub> and 80 % gasoline by volume), increasing 10 % PODE<sub>n</sub> and simultaneously introducing 60 % EGR can realize the same CA50 control as P20G80 under homogeneous conditions. For P20G80 under concentration-stratification conditions at the start of injection (SOI) of −180 and −160 °CA ATDC, introducing a slight amount of EGR below 10 % can promote the combustion intensity, since the unburned fuel recycled from the previous cycle through the EGR increases the local fuel concentration. Under fuel reactivity-stratification conditions, compared to the test conditions without EGR, the decreasing rate of ignition delay with the retarded SOI significantly reduces with the introduction of 25 % EGR, suggesting a nonlinear effect of EGR on the ignition delay.</div></div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"273 ","pages":"Article 108226"},"PeriodicalIF":7.2,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143895711","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

Identifying and enhancing the spillover of crucial intermediates on the Fischer–Tropsch catalyst: A mechanistic approach 鉴定和加强菲托催化剂上关键中间体的溢出：一种机制方法

IF 7.2 2区工程技术

Fuel Processing Technology Pub Date : 2025-04-30 DOI: 10.1016/j.fuproc.2025.108225

Masoud Safari Yazd , Jafar Towfighi Darian , Farshid Sobhani Bazghaleh , Mahdi Pourmand , Farshad Sobhani Bazghaleh

{"title":"Identifying and enhancing the spillover of crucial intermediates on the Fischer–Tropsch catalyst: A mechanistic approach","authors":"Masoud Safari Yazd , Jafar Towfighi Darian , Farshid Sobhani Bazghaleh , Mahdi Pourmand , Farshad Sobhani Bazghaleh","doi":"10.1016/j.fuproc.2025.108225","DOIUrl":"10.1016/j.fuproc.2025.108225","url":null,"abstract":"<div><div>Understanding and enhancing spillover phenomena in Fischer–Tropsch Synthesis (FTS) is critical for optimizing catalyst performance. In this study, we present a comprehensive evaluation of hydrogen, carbon monoxide, and water (θ-H, θ-CO, and θ-H<sub>2</sub>O) spillover mechanisms over a series of engineered multi-shell nanocomposite catalysts: Co@C(<em>Z</em>-d)@SiO<sub>2</sub>@CeO<sub>2</sub> (NC), the etched NC (NCE), and the Ru-doped NCE (RNCE). A suite of advanced characterization techniques, XRD, HR-XPS, FTIR, Raman, UV–Vis DRS, and TPD, along with molecular dynamics (MD) simulations, was employed to elucidate structure–function relationships and quantify the spillover behavior of key FTS intermediates. Our findings reveal that etching the silica layer significantly enhances oxygen vacancy formation and overall spillover activity. Among all catalysts, RNCE exhibits the highest oxygen vacancy concentration, the lowest oxygen vacancy formation energy, and the narrowest band gap, attributes that contribute to its superior spillover capacity. MD simulation results confirm that θ-H<sub>2</sub>O and θ-CO spillovers dominate over hydroxyl and θ-HCO spillovers, with RNCE achieving the highest spillover rates across all intermediate species. Performance tests conducted under varying partial pressures of H<sub>2</sub>, CO, and H<sub>2</sub>O further validate that enhanced spillover correlates directly with increased CO conversion and C<sub>5</sub><sup>+</sup> hydrocarbon selectivity. This study not only deciphers the mechanistic role of spillover in FTS but also highlights the synergistic effects of Ru promotion, silica etching, and oxygen vacancy engineering in advancing the design of high-performance FTS catalysts for efficient hydrocarbon production.</div></div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"273 ","pages":"Article 108225"},"PeriodicalIF":7.2,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892036","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

A novel and efficient catalytic system composed of Ru-NbOPO4 and decane for the hydrodeoxygenation of polycarbonate waste into cycloalkane fuels 一种新型高效的由Ru-NbOPO4和癸烷组成的催化体系用于聚碳酸酯废弃物加氢脱氧制备环烷烃燃料

IF 7.2 2区工程技术

Fuel Processing Technology Pub Date : 2025-04-30 DOI: 10.1016/j.fuproc.2025.108223

Jianxiu Hao , Yafang Zhang , Heya Na , Na Li , Yanpeng Ban , Huacong Zhou , Quansheng Liu

{"title":"A novel and efficient catalytic system composed of Ru-NbOPO4 and decane for the hydrodeoxygenation of polycarbonate waste into cycloalkane fuels","authors":"Jianxiu Hao , Yafang Zhang , Heya Na , Na Li , Yanpeng Ban , Huacong Zhou , Quansheng Liu","doi":"10.1016/j.fuproc.2025.108223","DOIUrl":"10.1016/j.fuproc.2025.108223","url":null,"abstract":"<div><div>Chemical recycling of polycarbonate (PC) waste can effectively upgrade PC to valuable chemicals. This work developed a novel catalytic system composed of Ru-NbOPO<sub>4</sub> as the catalyst and decane as the solvent for the selective hydrodeoxygenation of PC waste to cycloalkanes, a potential additive for jet fuels. The depolymerization degree and product distribution under the condition of different catalysts and solvents were investigated. The results proved that the combination of Ru-NbOPO<sub>4</sub> and decane exhibited the >99 % depolymerization degree of PC and > 99 % selectivity to cycloalkanes under 240 °C. The acidic sites in the NbOPO<sub>4</sub> framework effectively enhanced the hydrodeoxygenation capacity of the catalyst. The catalytic system can achieve the total conversion of real PC wastes (discarded CDs and water buckets) into cycloalkanes with >99 % selectivity under 240 °C. The by-product CO<sub>2</sub> derived from the carbonyl linking units in PC can also be converted into CH<sub>4</sub> along with the formation of cycloalkanes in one-pot reaction, increasing the catalytic efficiency of the system and decreasing the emission of CO<sub>2</sub>. With the advantages of high selectivity to cycloalkanes and efficient for real waste PC, the developed catalytic system provides a new approach for the selective upgradation of PC waste to cycloalkane fuels.</div></div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"273 ","pages":"Article 108223"},"PeriodicalIF":7.2,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887362","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

Oxygen-functionalized melem as a stable heterogeneous catalyst for free fatty acid esterification in low-grade biodiesel feedstocks 氧功能化聚乳酸作为低品位生物柴油原料中游离脂肪酸酯化的稳定非均相催化剂

IF 7.2 2区工程技术

Fuel Processing Technology Pub Date : 2025-04-29 DOI: 10.1016/j.fuproc.2025.108220

Sung Eun Kim , Elim Kim , Hyung Chul Ham , Dae-Won Lee , Deog-Keun Kim , Kwan-Young Lee , Hak Joo Kim

{"title":"Oxygen-functionalized melem as a stable heterogeneous catalyst for free fatty acid esterification in low-grade biodiesel feedstocks","authors":"Sung Eun Kim , Elim Kim , Hyung Chul Ham , Dae-Won Lee , Deog-Keun Kim , Kwan-Young Lee , Hak Joo Kim","doi":"10.1016/j.fuproc.2025.108220","DOIUrl":"10.1016/j.fuproc.2025.108220","url":null,"abstract":"<div><div>The feasibility of biodiesel production relies on efficiently utilizing low-grade feedstocks rich in free fatty acids (FFAs). However, high FFA content deactivates base catalysts via saponification, requiring pre-treatment with acid catalysts. This study synthesized oxygen-functionalized melem via a single-step acid treatment, employing it as a heterogeneous acid catalyst for FFA esterification. Characterization (SEM, XRD, FTIR, XPS, and solid-state <sup>13</sup>C NMR) and density functional theory (DFT) calculations identified NO₂, NO, and CO functional groups as key acidity-enhancing sites, achieving 94.3 % oleic acid conversion. The catalyst demonstrated excellent stability over five cycles with minimal active site leaching. Sequential esterification-transesterification with acid-treated melem and Na-GCN resulted in over 90 % biodiesel conversion. DFT calculations confirmed NO₂ functionalization as the most active site (1.47 eV). Implementation in a continuous packed-bed reactor maintained stable FFA conversion for over 100 h. These results highlight oxygen-functionalized melem as a costeffective, durable catalyst for biodiesel production from low-quality feedstocks, advancing sustainable fuel processing.</div></div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"273 ","pages":"Article 108220"},"PeriodicalIF":7.2,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143882047","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

Optimization of Ni loading amount in Ni-CeZrO2 catalyst for dodecane steam reforming for the upcycling of plastic pyrolysis oil 塑料热解油十二烷蒸汽重整升循环Ni- cezro2催化剂中Ni负载量的优化

IF 7.2 2区工程技术

Fuel Processing Technology Pub Date : 2025-04-21 DOI: 10.1016/j.fuproc.2025.108218

Min-Gyeong Bae , Yeol-Lim Lee , Hak-Min Kim , Ji-Won Son , Beom-Su Cheon , Dae-Woon Jeong

{"title":"Optimization of Ni loading amount in Ni-CeZrO2 catalyst for dodecane steam reforming for the upcycling of plastic pyrolysis oil","authors":"Min-Gyeong Bae , Yeol-Lim Lee , Hak-Min Kim , Ji-Won Son , Beom-Su Cheon , Dae-Woon Jeong","doi":"10.1016/j.fuproc.2025.108218","DOIUrl":"10.1016/j.fuproc.2025.108218","url":null,"abstract":"<div><div>In response to global efforts to address plastic pollution, pyrolysis of waste plastics offers a sustainable pathway for chemical recycling and clean hydrogen production. This study focuses on the steam reforming of dodecane, a key component of light oil derived from plastic pyrolysis, to produce hydrogen. Nickel-based catalysts supported on Ce<sub>0.8</sub>Zr<sub>0.2</sub>O<sub>2</sub> (Ni-CeZrO<sub>2</sub>) with varying Ni loadings (1, 3, 5, and 10 wt%) were synthesized using a co-precipitation method and characterized by various characterization techniques. The catalytic performance was evaluated under steam reforming conditions at 750 °C. Among the prepared catalysts, 5 wt% Ni-CeZrO<sub>2</sub> exhibited the highest hydrogen yield and dodecane conversion due to its optimal balance of Ni<sup>0</sup> active sites, oxygen storage capacity, and strong metal-support interaction. The 10 wt% Ni-CeZrO<sub>2</sub> catalyst showed higher initial activity but suffered rapid deactivation due to excessive carbon formation, while lower Ni loadings (1 and 3 wt%) showed insufficient active sites for effective reforming. The results indicate that 5 wt% Ni-CeZrO<sub>2</sub> is the optimal loading amount for the steam reforming of dodecane, providing a balance between high activity and long-term stability.</div></div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"272 ","pages":"Article 108218"},"PeriodicalIF":7.2,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143852019","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 on high temperature direct water injection characteristics within hydrogen/oxygen/argon premixed combustion process 氢/氧/氩预混燃烧过程高温直接注水特性数值研究

IF 7.2 2区工程技术

Fuel Processing Technology Pub Date : 2025-04-19 DOI: 10.1016/j.fuproc.2025.108219

Huijiang Wang , Yang Bai , Zhe Kang , Yanfei Li

{"title":"Numerical investigation on high temperature direct water injection characteristics within hydrogen/oxygen/argon premixed combustion process","authors":"Huijiang Wang , Yang Bai , Zhe Kang , Yanfei Li","doi":"10.1016/j.fuproc.2025.108219","DOIUrl":"10.1016/j.fuproc.2025.108219","url":null,"abstract":"<div><div>Hydrogen-fueled argon power cycle (H<sub>2</sub>-APC) is a novel power system with high efficiency and zero emission by utilizing argon/oxygen mixture with high specific heat ratio as the working fluids. However, H<sub>2</sub>-APC engines suffer from the challenge of knock suppression. Direct water injection (DWI) is an effective method to inhibit detonation. Spray morphology has a significant impact on the effectiveness of DWI and the study of spray characteristics in hydrogen/oxygen/argon premixed combustion atmosphere is critical. Based on a three-dimensional computational model built by the test bench data, this paper explores the DWI characteristics within hydrogen/oxygen/argon premixed combustion atmosphere and the effect of DWI on the combustion process. The results show that as the ambient temperature increases, the ambient density decreases and the SMD enlarges. The difference in spray morphology is small in the high-temperature and high-pressure environments after combustion. As the ambient pressure elevates, both the jet SMD and penetration reduce, and the evaporated mass improves. In addition, the majority of the water spray in contact with flame will evaporate rapidly due to the high temperature. Some of the liquid water on the outside of spray will evaporate owing to the heat, while the remaining portion will crack into OH reactive groups. The results can serve as an effective guide for the high efficiency operation scheme of H<sub>2</sub>-APC engines.</div></div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"272 ","pages":"Article 108219"},"PeriodicalIF":7.2,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143847502","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

Hydroisomerization of n-dodecane on ZSM-48 with acid distribution modulation for high diffusion performance 正十二烷在ZSM-48上的加氢异构化与酸分布调制以获得高扩散性能

IF 7.2 2区工程技术

Fuel Processing Technology Pub Date : 2025-04-16 DOI: 10.1016/j.fuproc.2025.108217

Wei Zhang , Jiangnan Xiang , Yuting Wang , Mengxi Ma , Yan Wang , Bo Qin , Weijiong Dai , Binbin Fan , Jiajun Zheng , Ruifeng Li

{"title":"Hydroisomerization of n-dodecane on ZSM-48 with acid distribution modulation for high diffusion performance","authors":"Wei Zhang , Jiangnan Xiang , Yuting Wang , Mengxi Ma , Yan Wang , Bo Qin , Weijiong Dai , Binbin Fan , Jiajun Zheng , Ruifeng Li","doi":"10.1016/j.fuproc.2025.108217","DOIUrl":"10.1016/j.fuproc.2025.108217","url":null,"abstract":"<div><div>In this paper, a one-dimensional ten-membered ring microporous molecular sieve ZSM-48 is employed as a model catalyst, with the number and positional distribution of acid sites in ZSM-48 molecular sieve adjusted by regulating the temperature of templating agent exfoliation. XRD, FT-IR, SEM, TG, NH<sub>3</sub>-TPD, N<sub>2</sub> adsorption-desorption, and the zero-length column (ZLC) method are used for characterization and analysis. The decrease in the distribution depth of acid sites within the microporous channels of ZSM-48 will not only significantly affects the hydroisomerization performance of <em>n</em>-dodecane (resulting in a final yield of isododecane of more than 80 %) but also influences the yield ratio of multi-branched and mono-branched isomers. After the conversion is stabilized, the yield ratio of multi-branched to mono-branched isomers for Z-48-350 is 1.4 to 2.1 times higher than that for Z-48-550. Furthermore, acid site distribution depth profoundly influences reactant diffusion, with Z-48-120 exhibiting a 115 % higher effective diffusion constant than Z-48-550 at 140 °C. Shortening the distribution depth of acid sites in the micropores does not significantly change the product distribution of <em>n</em>-dodecane monomethyl isomers but markedly suppresses the cracking reaction due to reduced diffusion limitation of olefinic intermediates. This enables efficient and selective hydroisomerization of long-chain <em>n</em>-alkanes.</div></div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"272 ","pages":"Article 108217"},"PeriodicalIF":7.2,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143835040","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

Extraction of Ge and synchronous activation of humic acid in germanium bearing lignite via oxidation leaching 氧化浸出含锗褐煤中锗的萃取及腐植酸的同步活化

IF 7.2 2区工程技术

Fuel Processing Technology Pub Date : 2025-04-15 DOI: 10.1016/j.fuproc.2025.108216

Honghu Tang , Bingjian Liu , Xiongxing Zhang , Lijun Li , Zhenyue Zhang , Qingjun Guan

{"title":"Extraction of Ge and synchronous activation of humic acid in germanium bearing lignite via oxidation leaching","authors":"Honghu Tang , Bingjian Liu , Xiongxing Zhang , Lijun Li , Zhenyue Zhang , Qingjun Guan","doi":"10.1016/j.fuproc.2025.108216","DOIUrl":"10.1016/j.fuproc.2025.108216","url":null,"abstract":"<div><div>Germanium-bearing lignite was a crucial source for Ge extraction; however, existing methods focus on extracting Ge from lignite by-products, which overlooked its abundant organic matters. Effectively extracting valuable elements from lignite and fully utilizing its organic resources are still significant challenges. In this study, a novel processing of recovering Ge and synchronous extracting humic acids in germanium-bearing lignite via oxidation leaching was proposed. A Ge extraction recovery of 73.93 % was achieved using a L/S ratio of 10 and 5 % nitric acid at 90 °C for 30 min. The effects of nitric acid on the activation and depolymerization of lignite samples were also analyzed. The results demonstrated that HNO<sub>3</sub> pretreatment significantly enhanced humic acid yield, increasing it from 28.73 % to 71.32 % in lignite. The mechanism of Ge oxidation leaching in lignite was investigated, which could be divided into four stages due to the migration and transformation behavior of germanium. In addition, a new technical route for the efficient and high recovery of strategic rare metals Ge and organic resources humic acid in lignite was proposed. The research establishes a foundation for the extraction of valuable metal elements and the efficient utilization of organic resources in lignite.</div></div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"272 ","pages":"Article 108216"},"PeriodicalIF":7.2,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143828745","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

Influence of fuel formulation on exhaust emissions from gasoline direct injection vehicle 燃油配方对汽油直喷汽车尾气排放的影响

IF 7.2 2区工程技术

Fuel Processing Technology Pub Date : 2025-04-06 DOI: 10.1016/j.fuproc.2025.108215

Tawfiq Al Wasif-Ruiz , Paloma Álvarez-Mateos , José Alberto Sánchez-Martín , María Guirado , Carmen Cecilia Barrios-Sánchez

{"title":"Influence of fuel formulation on exhaust emissions from gasoline direct injection vehicle","authors":"Tawfiq Al Wasif-Ruiz , Paloma Álvarez-Mateos , José Alberto Sánchez-Martín , María Guirado , Carmen Cecilia Barrios-Sánchez","doi":"10.1016/j.fuproc.2025.108215","DOIUrl":"10.1016/j.fuproc.2025.108215","url":null,"abstract":"<div><div>Fuel formulations are adjusted seasonally to optimize engine performance and emissions control. This study examines the impact of these changes on emissions from a Euro 6 vehicle during a real driving emissions cycle in Madrid, Spain. Keeping temperature constant, we compared winter and summer gasoline. Results show that using winter gasoline in summer increases nitrogen oxides emissions by 12.6 %, while in winter, it raises particulate emissions by 17.2 % compared to summer gasoline. Additionally, in a typical scenario—using summer gasoline in summer and winter gasoline in winter—particle emissions were 17.7 % higher with winter gasoline. These findings highlight the need to refine fuel formulations, as internal combustion engines will continue to coexist with electric and hybrid vehicles, especially in freight transport, agriculture, and rural mobility. Understanding how seasonal gasoline variations affect emissions is crucial for developing strategies to reduce environmental impact and improve air quality year-round.</div></div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"272 ","pages":"Article 108215"},"PeriodicalIF":7.2,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143783831","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

Experimental and numerical studies on the NO reaction pathways of NH3 cofiring with coal volatile matter NH3与煤挥发物共烧NO反应途径的实验与数值研究

IF 7.2 2区工程技术

Fuel Processing Technology Pub Date : 2025-04-03 DOI: 10.1016/j.fuproc.2025.108214

Jingyang Han , Yan Xie , Jun Li , Xin Liu , Wenzhen Zhang , Heyang Wang

{"title":"Experimental and numerical studies on the NO reaction pathways of NH3 cofiring with coal volatile matter","authors":"Jingyang Han , Yan Xie , Jun Li , Xin Liu , Wenzhen Zhang , Heyang Wang","doi":"10.1016/j.fuproc.2025.108214","DOIUrl":"10.1016/j.fuproc.2025.108214","url":null,"abstract":"<div><div>Ammonia (NH<sub>3</sub>) cofiring provides a promising solution to carbon reduction of coal-fired boilers, but it may lead to increased NO<sub><em>x</em></sub> emissions. However, many experiments observed that the NO<sub><em>x</em></sub> emissions exhibited an increase-then-decrease trend with the increase of NH<sub>3</sub> cofiring ratio (<em>R</em><sub>NH3</sub>), indicating that NO<sub><em>x</em></sub> could be controlled under high <em>R</em><sub>NH3</sub>. To reveal the underlying mechanism, the experiments of NH<sub>3</sub> cofiring with coal volatile were first conducted in a one-dimensional flow reactor to reveal that this trend is primarily attributed to the gaseous reactions of volatile and NH<sub>3</sub>. A chemical reactor network model was then constructed to investigate the influences of <em>R</em><sub>NH3</sub> on the NO reaction pathways of NH<sub>3</sub>. The predicted results replicated the increase and then decrease trend of NO<sub><em>x</em></sub> emissions as <em>R</em><sub>NH3</sub> increased beyond 25 %. It was found that NO formation is primarily controlled by the reactions between HNO/N and OH/H radicals. Under lower <em>R</em><sub>NH3</sub>, the concentrations of HNO/N increase with the increase of <em>R</em><sub>NH3</sub> leading to increased NO formation. Under higher <em>R</em><sub>NH3</sub>, however, much of the OH/H radicals are consumed by the dehydrogenation reactions of NH<sub>3</sub> which consequently inhibits the NO formation reactions. Therefore, the root mechanism of the increase-then-decrease trend of NO<sub><em>x</em></sub> emissions is attributed to the competition for the OH/H radicals between the initial and final steps of the NO formation reaction pathway.</div></div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"272 ","pages":"Article 108214"},"PeriodicalIF":7.2,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769223","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