Fuel Processing Technology最新文献_第4页

Upcycling Waste to Wealth: CuO-SiO₂/reduced graphene nanocomposite from pomegranate peels for one-pot low-temperature conversion of waste oils into valuable fatty acid monomers 将废物转化为财富：将石榴皮中的cuo - sio2 /还原石墨烯纳米复合材料用于一锅低温将废油转化为有价值的脂肪酸单体

IF 7.7 2区工程技术

Fuel Processing Technology Pub Date : 2025-08-27 DOI: 10.1016/j.fuproc.2025.108314

Shahenda Mahran , Maria Centeno , Attia Attia , Basudeb Saha

{"title":"Upcycling Waste to Wealth: CuO-SiO₂/reduced graphene nanocomposite from pomegranate peels for one-pot low-temperature conversion of waste oils into valuable fatty acid monomers","authors":"Shahenda Mahran , Maria Centeno , Attia Attia , Basudeb Saha","doi":"10.1016/j.fuproc.2025.108314","DOIUrl":"10.1016/j.fuproc.2025.108314","url":null,"abstract":"<div><div>The utilisation of heterogeneous catalysts in producing fatty acid monomers can minimise the separation cost and hence reduce the price of the fatty acid monomers. This study reports for the first time a novel, environmentally benign, highly active copper oxide-silica oxide/reduced graphene oxide (CuO-SiO<sub>2</sub>/RGO), heterogeneous nano-catalyst derived from waste pomegranate peels, for the one-pot, low-temperature synthesis of fatty acid monomers from high-acid-value waste vegetable oil (WVO). The synthesised nano-catalyst was extensively characterised using XRD, FT-IR, TEM, SEM, EDX and TGA-DTA. Further, it was utilised to synthesise fatty acid-rich oleic phenoxypropyl acrylate (OPA) monomer from high acid value WVO via a single-step reaction. The process parameters for the synthesis of OPA monomer using CuO-SiO<sub>2</sub>/RGO catalyst have been optimised using response surface methodology (RSM) and found to be 8.5:1 reactant molar ratio, 3.5 % (<em>w</em>/w) catalyst loading, 54 °C temperature, and 9.5 h reaction time, where the highest OPA monomer yield was 95.73 % under optimum conditions. The CuO-SiO<sub>2</sub>/RGO exhibited stable catalytic performance after regeneration with an OPA yield of 93.1 ± 0.37 % after five consecutive runs. The plausible reaction mechanism unveiled that the direct synthesis of OPA monomer from high acid value WVO occurred through both transesterification and esterification reactions simultaneously on the surface of CuO and SiO2 catalyst supported on RGO sheets. The adaptation of waste pomegranate peels into a high-value CuO-SiO<sub>2</sub>/RGO nano-catalyst offers a new direction for clean, one-pot and low-temperature production of sustainable fatty acid monomers from high-acid-value WVO.</div></div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"277 ","pages":"Article 108314"},"PeriodicalIF":7.7,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144903089","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 study on stretch extinction mechanism of NH3/H2/air laminar counterflow premixed flames NH3/H2/空气层流逆流预混火焰拉伸熄灭机理的数值研究

IF 7.7 2区工程技术

Fuel Processing Technology Pub Date : 2025-08-27 DOI: 10.1016/j.fuproc.2025.108319

Wenxuan Zhou , Yinhu Kang , Jiuyi Zhang , Haoran Wang , Xiaomei Huang , Xiaofeng Lu

{"title":"Numerical study on stretch extinction mechanism of NH3/H2/air laminar counterflow premixed flames","authors":"Wenxuan Zhou , Yinhu Kang , Jiuyi Zhang , Haoran Wang , Xiaomei Huang , Xiaofeng Lu","doi":"10.1016/j.fuproc.2025.108319","DOIUrl":"10.1016/j.fuproc.2025.108319","url":null,"abstract":"<div><div>Ammonia and hydrogen are two most promising carbon-free fuels emerging in recent years, and their co-combustion is well recognized as an efficient approach to solve the issues associated with ammonia's poor combustion behaviors. This study emphasizes fundamentally the combustion properties, particularly the stretch-induced extinction limit as well as the underlying physical mechanism of the NH<sub>3</sub>/H<sub>2</sub>/air laminar counterflow premixed flames by carrying out simulations with detailed fuel chemistry and transport models. The results demonstrate that hydrogen addition significantly extends the ammonia flame extinction strain rate, with the equivalence ratio corresponding to the maximum extinction strain rate shifting toward leaner stoichiometry as hydrogen addition increases. The combination of thermal, chemical, and transport effects of hydrogen enhances the NH<sub>3</sub>/H<sub>2</sub> premixed flame stability. More specifically, the contribution of thermal effect to extinction prevails under the fuel-rich condition, decreasing with the decrement of equivalence ratio. The effective Lewis number of the premixture is responsible for the distinct thermal effect response behaviors in fuel-lean condition compared with the stoichiometric and rich conditions. By comparatively analyzing chemical kinetics and flame structure between the strongly-stable and near-extinction flames, it elucidates the governing chemical pathways and critical radical interactions responsible for the NH<sub>3</sub>/H<sub>2</sub> stretched premixed flame extinction.</div></div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"277 ","pages":"Article 108319"},"PeriodicalIF":7.7,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144907504","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

Nitrogen incorporation in SAPO-34: How urea etching improves catalyst lifetime and selectivity 氮在SAPO-34中的掺入：尿素蚀刻如何提高催化剂寿命和选择性

IF 7.7 2区工程技术

Fuel Processing Technology Pub Date : 2025-08-26 DOI: 10.1016/j.fuproc.2025.108318

Hossein Mozafari Khalafbadam, Jafar Towfighi Darian, Masoud Safari Yazd

{"title":"Nitrogen incorporation in SAPO-34: How urea etching improves catalyst lifetime and selectivity","authors":"Hossein Mozafari Khalafbadam, Jafar Towfighi Darian, Masoud Safari Yazd","doi":"10.1016/j.fuproc.2025.108318","DOIUrl":"10.1016/j.fuproc.2025.108318","url":null,"abstract":"<div><div>Urea etching of SAPO-34 offers an effective route to enhance its catalytic performance in the methanol-to-olefins (MTO) process. This work examines the effects of nitrogen doping and mesoporosity enhancement on SAPO-34's physicochemical and catalytic properties through combined experimental and theoretical methods, including XRD, FTIR, HR-XPS, NH<sub>3</sub>-TPD, molecular dynamics (MD) simulations, and performance testing. HR-XPS confirms successful nitrogen incorporation, showing increased C<img>N and N<img>C species with reduced C<img>Si and N<img>Si bonds. XRD and FE-SEM reveal decreased crystallinity and particle size, contributing to higher surface area and mesoporosity. NH<sub>3</sub>-TPD indicates moderated strong acid sites and increased weak acid sites, optimizing the acidity profile for improved ethylene selectivity and coke resistance. MD simulations show that nitrogen doping stabilizes methanol conversion steps and suppresses coke precursor formation, prolonging catalyst life. Catalytic tests demonstrate that urea-etched SAPO-34 (SP-UN) surpasses conventional SAPO-34 (SP), achieving higher ethylene selectivity (57.42 %), sustaining high selectivity for over 420 min, and exhibiting slower deactivation. The synergy of framework stabilization, balanced acidity, and enhanced diffusion properties significantly boosts SAPO-34's efficiency and durability in MTO applications.</div></div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"277 ","pages":"Article 108318"},"PeriodicalIF":7.7,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144896664","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

Effect of transition metal on the physical and hydrogen storage properties of the dynamically stable novel ARhH3 (A = Mg, Ca, and Sr) hydrides for solid-state hydrogen storage application: A DFT and AIMD study 过渡金属对动态稳定新型ARhH3 （A = Mg, Ca, Sr）氢化物物理和储氢性能的影响：DFT和AIMD研究

IF 7.7 2区工程技术

Fuel Processing Technology Pub Date : 2025-08-22 DOI: 10.1016/j.fuproc.2025.108312

Md. Rabbi Talukder , Md Rasidul Islam

{"title":"Effect of transition metal on the physical and hydrogen storage properties of the dynamically stable novel ARhH3 (A = Mg, Ca, and Sr) hydrides for solid-state hydrogen storage application: A DFT and AIMD study","authors":"Md. Rabbi Talukder , Md Rasidul Islam","doi":"10.1016/j.fuproc.2025.108312","DOIUrl":"10.1016/j.fuproc.2025.108312","url":null,"abstract":"<div><div>A thorough examination of the physical and hydrogen storage properties of novel ARhH<sub>3</sub> (A = Mg, Ca, and Sr) hydrides employs first-principles Density Functional Theory. The mechanical, dynamic, thermodynamic, and phase stability of ARhH<sub>3</sub> hydrides were validated by assessing the Born stability criteria, phonon spectra, formation energies, and tolerance factors, respectively. Both the PBE and HSE06 functionals revealed that each of the entitled perovskites exhibits metallic character (<em>E</em><sub>g</sub> = 0 eV), showcasing remarkable conductivity that boosts charge transfer and facilitates the efficient (de)hydrogenation kinetics. Optical functions exhibited great potency in both the visible and UV spectra. The Cauchy pressure, Pugh's, and Poisson's ratios revealed the ductile nature of ARhH<sub>3</sub> perovskites. Furthermore, these perovskites exhibit excellent mechanical properties, including Young's modulus of 43.51–127.76 GPa, machinability index of 2.13–11.76, melting temperature of 1483.98–1684.06 K, sound velocity of 1945.51–3452.84 ms<sup>−1</sup>, and notable anisotropic behavior. The thermal stability of these hydrides was confirmed by the thermodynamic evaluations and AIMD simulations. MgRhH<sub>3</sub>, CaRhH<sub>3,</sub> and SrRhH<sub>3</sub> demonstrated substantial gravimetric hydrogen storage capacities of 2.34, 2.07, and 1.56 wt%, as well as volumetric storage capacities of 117.65, 103.14, and 93.36 gH<sub>2</sub>/L, respectively. Interestingly, the hydrogen desorption temperatures for MgRhH<sub>3</sub>, CaRhH<sub>3,</sub> and SrRhH<sub>3</sub> are recorded at 481 K, 531 K, and 493 K, respectively, enabling them to be highly suitable for practical solid-state hydrogen storage applications.</div></div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"277 ","pages":"Article 108312"},"PeriodicalIF":7.7,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144887544","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

Auto-ignition characteristics and kinetic modeling study of PODE3/n-heptane blends PODE3/正庚烷共混物的自燃特性及动力学建模研究

IF 7.7 2区工程技术

Fuel Processing Technology Pub Date : 2025-08-20 DOI: 10.1016/j.fuproc.2025.108311

Yuwei Zhao , Yingtao Wu , Jing Zou , Wenxiu Zheng , Chenglong Tang , Xiaochen Wang , Tianlin Niu

{"title":"Auto-ignition characteristics and kinetic modeling study of PODE3/n-heptane blends","authors":"Yuwei Zhao , Yingtao Wu , Jing Zou , Wenxiu Zheng , Chenglong Tang , Xiaochen Wang , Tianlin Niu","doi":"10.1016/j.fuproc.2025.108311","DOIUrl":"10.1016/j.fuproc.2025.108311","url":null,"abstract":"<div><div>Polyoxymethylene dimethyl ethers (PODE<sub>n</sub>) are promising oxygenated additives for diesel engines due to their high cetane number and low soot emissions. However, the auto-ignition characteristics of PODE<sub>3</sub> blended with diesel surrogate fuels like <em>n</em>-heptane remain unclear, especially under low-to-intermediate temperature conditions (600–1000 K). In this work, the ignition delay times (IDTs) of PODE<sub>3</sub>/<em>n</em>-heptane blends (10–40 % PODE<sub>3</sub> molar fraction) were measured in a rapid compression machine (RCM) under stoichiometric conditions (<em>φ</em> = 1.0), pressure of 10 bar, and temperatures ranging from 600 to 1000 K. Results show that the IDT decreases significantly with higher PODE<sub>3</sub> content, particularly above 800 K. While below 700 K, the effect of PODE<sub>3</sub> addition on the IDTs was less pronounced. A merged kinetic model combining validated PODE<sub>3</sub> and <em>n</em>-heptane mechanisms accurately captured the IDT trends with varying fuel compositions and their negative temperature coefficient (NTC) behaviors. Kinetic analyses revealed that PODE<sub>3</sub> accelerates n-heptane's first-stage ignition by enhancing radical accumulation (e.g., ȮH) through H-atom abstraction. Sensitivity analysis identified HȮ2 radical dynamics as critical in controlling system reactivity, with PODE<sub>3</sub> exhibiting a stronger promotion effect than n-heptane at higher temperatures. Reaction pathway analysis further indicated that temperature elevation shifts fuel consumption toward PODE<sub>3</sub>-dominated <em>β</em>-scission reactions, generating CH<sub>2</sub>O and H<sub>2</sub>O<sub>2</sub>, which decompose to ȮH radicals and accelerate ignition. These findings provide critical insights into optimizing PODE<sub>3</sub>-blended fuels for advanced engine designs.</div></div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"277 ","pages":"Article 108311"},"PeriodicalIF":7.7,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144863903","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 study on the co-firing of ammonia, hydrogen, and methanol with natural gas in a 100 MW NGCC process for carbon neutrality 100 MW NGCC工艺中氨、氢、甲醇与天然气共烧的碳中和研究

IF 7.7 2区工程技术

Fuel Processing Technology Pub Date : 2025-08-19 DOI: 10.1016/j.fuproc.2025.108313

Jeongjae Oh , Inhye Kim , Minsuk Im , Dongwoo Kang , Sunghyun Cho

{"title":"A study on the co-firing of ammonia, hydrogen, and methanol with natural gas in a 100 MW NGCC process for carbon neutrality","authors":"Jeongjae Oh , Inhye Kim , Minsuk Im , Dongwoo Kang , Sunghyun Cho","doi":"10.1016/j.fuproc.2025.108313","DOIUrl":"10.1016/j.fuproc.2025.108313","url":null,"abstract":"<div><div>This study proposes a co-firing strategy involving ammonia, hydrogen, and methanol with natural gas in a 100 MW natural gas combined cycle (NGCC) power plant to reduce carbon dioxide emissions. Simulations were performed to assess fuel consumption, CO₂ and NOₓ emissions, and economic feasibility across different co-firing ratios. Co-firing hydrogen showed the most significant CO₂ reduction but resulted in increased NOₓ emissions. Ammonia and methanol co-firing moderately reduced CO₂ emissions and led to lower flue gas temperatures and NOₓ formation. Although co-firing is currently more expensive than using natural gas alone, techno-economic assessments under net-zero scenarios for 2030 and 2050 suggest improved cost competitiveness. With carbon taxes and fuel price changes, hydrogen becomes more economically viable by 2050, and methanol approaches the cost of natural gas. The results provide benchmarks for clean fuel integration in fossil-based power generation and highlight trade-offs between emissions and economic performance. This study contributes to the development of sustainable combustion strategies and supports policy and technology planning for decarbonized power systems.</div></div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"277 ","pages":"Article 108313"},"PeriodicalIF":7.7,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144863902","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

Nano-molecular response of bituminous coal to ScCO₂ at different stage: Experiments and ReaxFF-MD/DFT insights 不同阶段烟煤对ScCO 2的纳米分子响应：实验和ReaxFF-MD/DFT见解

IF 7.7 2区工程技术

Fuel Processing Technology Pub Date : 2025-08-18 DOI: 10.1016/j.fuproc.2025.108305

Kui Dong , Jianhua Xiang , Shaoqi Kong , Bingyi Jia , Zhiyu Niu

{"title":"Nano-molecular response of bituminous coal to ScCO₂ at different stage: Experiments and ReaxFF-MD/DFT insights","authors":"Kui Dong , Jianhua Xiang , Shaoqi Kong , Bingyi Jia , Zhiyu Niu","doi":"10.1016/j.fuproc.2025.108305","DOIUrl":"10.1016/j.fuproc.2025.108305","url":null,"abstract":"<div><div>The interaction between supercritical CO₂ (ScCO₂) and coal alters the physicochemical properties of the coal in a staged manner. This study quantitatively investigates the nano-molecular structural response of bituminous to ScCO₂ exposure using a combination of experiments and ReaxFF-MD/DFT simulations. The results show that:In the swelling stage, the coal matrix expanded and early radical formation occurred, leading to a reduction in intramolecular pore volume from 0.0326 to 0.0318 cm<sup>3</sup>/g, while intermolecular pores increased from 0.0119 to 0.0145 cm<sup>3</sup>/g, Car-Car from 145 to 149, Cal-H from 103 to 92, weak van der Waals and hydrogen bonds were cleaved. In the dissolution stage, aliphatic chains degraded and oxygen-containing groups formed, intramolecular and intermolecular pores expanded to 0.0334 and 0.0165 cm<sup>3</sup>/g, respectively, increasing Car–Car bonds to 150, and Cal-H to 89, electron density recovered with the development of aromatic conjugation and polar groups In the rearrangement stage, radicals recombined into new aromatics, compressing intermolecular pores to 0.0160 cm<sup>3</sup>/g, while intramolecular pores increased to 0.0346 cm<sup>3</sup>/g, reducing Car–Car bonds to 142 and Cal-H to 84, electrostatic potential strengthened, indicating molecular stabilization.This work provides a novel, stage-specific, and quantitatively supported mechanism of bituminous evolution under ScCO₂ conditions, offering theoretical insight into molecular-scale optimization strategies for CO₂-ECBM.</div></div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"277 ","pages":"Article 108305"},"PeriodicalIF":7.7,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144863901","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

Investigation on the formation of nitrogen, sulfur and chlorine species in air and oxy-fuel combustion of biomass in a semi-industrial combustion chamber 研究空气中氮、硫和氯的形成及半工业燃烧室中生物质的全氧燃烧

IF 7.7 2区工程技术

Fuel Processing Technology Pub Date : 2025-08-18 DOI: 10.1016/j.fuproc.2025.108303

D. König, J. Ströhle, B. Epple

{"title":"Investigation on the formation of nitrogen, sulfur and chlorine species in air and oxy-fuel combustion of biomass in a semi-industrial combustion chamber","authors":"D. König, J. Ströhle, B. Epple","doi":"10.1016/j.fuproc.2025.108303","DOIUrl":"10.1016/j.fuproc.2025.108303","url":null,"abstract":"<div><div>In this paper, the influence of oxy-fuel operation with flue gas recirculation on the occurrence of minority species in a semi-industrial combustion chamber is analyzed. The change of classical air combustion to an oxidizer mixture of O<sub>2</sub> and flue gas in oxy-fuel combustion shows different changes in the formation of minority species like <figure><img></figure> and SO<sub>2</sub>. This is due to the present of high levels of CO<sub>2</sub> and a back feeding of this gaseous pollutant components into the combustion chamber through flue gas recirculation. In total, the changing formation mechanisms due to the presence of higher CO<sub>2</sub> concentrations in the combustion chamber, leading to increased amounts of nitrogen, sulfur and chlorine based species. During oxy-fuel combustion, the formation of CS<sub>2</sub> in the center of the flame is significantly higher, due to the availability of CO<sub>2</sub>. When comparing different oxygen concentrations in oxy-fuel flames, it is evident that the lowest oxygen concentration most closely resembles the air combustion case. This suggests that the overall formation of nitrogen, sulfur, and chlorine species and the burnout of those in the flame is highly dependent on the flame temperature. Therefore, a reduction in flame temperature leads to a corresponding decrease in the formation of these species in both air and oxy-fuel combustion scenarios.</div></div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"277 ","pages":"Article 108303"},"PeriodicalIF":7.7,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144860887","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 pilot diesel ratio and engine load on combustion behaviour in a biogas-fueled RCCI engine 先导柴油比和发动机负荷对沼气RCCI发动机燃烧性能的影响

IF 7.7 2区工程技术

Fuel Processing Technology Pub Date : 2025-08-18 DOI: 10.1016/j.fuproc.2025.108307

M. Yavuz , I.T. Yilmaz

{"title":"Influence of pilot diesel ratio and engine load on combustion behaviour in a biogas-fueled RCCI engine","authors":"M. Yavuz , I.T. Yilmaz","doi":"10.1016/j.fuproc.2025.108307","DOIUrl":"10.1016/j.fuproc.2025.108307","url":null,"abstract":"<div><div>The present study aims to analyse the combustion-related parameters in a reactivity-controlled compression ignition (RCCI) engine with a dual-fuel approach for diesel and biogas fuels. The objective is to investigate how varying biogas energy share ratios (50 %, 60 %, 70 %, and 80 %) affect combustion behaviour at different engine loads (40, 60, and 80 Nm). All tests were conducted at a constant engine speed of 1750 rpm. Results from dual-fuel operation were compared to baseline diesel combustion. The findings indicated that an increase in the biogas addition generally resulted in the deterioration of combustion stability, as evidenced by elevated ignition delays and COV<sub>IMEP</sub> values. However, this negative impact was mitigated at higher engine loads and increased diesel pilot ratios. As the quantity of biogas increased, a rise in cylinder pressures, pressure rise rates, ignition delays and ringing intensities was observed. Conversely, combustion stabilities, peak heat release rates and combustion durations all decreased. This research contributes to advancing sustainable practices in engine technology by promoting alternative fuel adoption in internal combustion engines, aligning with efforts to enhance energy efficiency and sustainability in the transportation sector.</div></div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"277 ","pages":"Article 108307"},"PeriodicalIF":7.7,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144860888","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

Recyclable methanesulfonic acid-based deep eutectic solvents for efficient biodiesel production via transesterification 通过酯交换反应高效生产生物柴油的可回收甲烷磺酸基深度共晶溶剂

IF 7.7 2区工程技术

Fuel Processing Technology Pub Date : 2025-08-14 DOI: 10.1016/j.fuproc.2025.108310

Akram Ali Nasser Mansoor Al-Haimi , Fatma Yehia , Fen Liu , Xiang Zhen , Shunni Zhu , Zhongming Wang

{"title":"Recyclable methanesulfonic acid-based deep eutectic solvents for efficient biodiesel production via transesterification","authors":"Akram Ali Nasser Mansoor Al-Haimi , Fatma Yehia , Fen Liu , Xiang Zhen , Shunni Zhu , Zhongming Wang","doi":"10.1016/j.fuproc.2025.108310","DOIUrl":"10.1016/j.fuproc.2025.108310","url":null,"abstract":"<div><div>This study explores, for the first time, the catalytic application of two previously developed methanesulfonic acid-based deep eutectic solvents (MSA-based DESs), namely MSA/choline chloride (MSA/ChCl) and MSA/tetraoctylammonium bromide (MSA/TOAB), for the transesterification of triglyceride-based oils into biodiesel. The aim was to develop recyclable acid catalysts and integrated processing strategies for biodiesel production, leveraging the thermal stability and recovery potential of MSA-based DESs. While these DESs have exhibited efficiency in esterification, their performance in transesterification remains unexamined. Both DESs were assessed under atmospheric and pressurized conditions to evaluate catalytic activity, methanol retention, and process efficiency. Fatty acid methyl ester (FAME) yields were quantified by gas chromatography, revealing that under mild conditions, the methanol retention system enabled slow but sustained conversion, with MSA/ChCl reaching 45.34 % yield after 30 d. Transitioning to a pressurized reactor significantly enhanced reaction kinetics, with MSA/ChCl reaching a FAME yield of 97 % within 3 h under optimized conditions (120 °C, 2 wt% catalyst, 60 wt% methanol). Further increases in DES concentration enabled yields exceeding 99 %. Key parameters, including methanol dosage, reaction time, temperature, and DES concentration, were optimized, and catalyst reusability was validated over five cycles, with yields remaining above 83 %. A closed-loop process was proposed for DES and methanol recovery to enhance scalability and minimize waste. This work extends the application of MSA-based DESs to transesterification, demonstrating a recyclable, high-activity Brønsted acid catalyst capable of achieving high biodiesel yields at low dosage, thereby addressing key limitations of conventional acid systems and supporting the development of sustainable industrial biodiesel processes.</div></div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"277 ","pages":"Article 108310"},"PeriodicalIF":7.7,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144831030","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