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Techno-economic evaluation and multi-objective optimization of a cogeneration system integrating solid oxide fuel cell with steam Rankine and supercritical carbon dioxide Brayton cycles 固体氧化物燃料电池与蒸汽朗肯和超临界二氧化碳布雷顿循环相结合的热电联产系统的技术经济评价和多目标优化
IF 6.7 1区 工程技术
Fuel Pub Date : 2024-11-17 DOI: 10.1016/j.fuel.2024.133675
Zihao Huang , Huailiang You , Jitian Han , Guoxiang Li , Yan Xiao , Bin Hu , Ze-Hang Chen , Daifen Chen
{"title":"Techno-economic evaluation and multi-objective optimization of a cogeneration system integrating solid oxide fuel cell with steam Rankine and supercritical carbon dioxide Brayton cycles","authors":"Zihao Huang ,&nbsp;Huailiang You ,&nbsp;Jitian Han ,&nbsp;Guoxiang Li ,&nbsp;Yan Xiao ,&nbsp;Bin Hu ,&nbsp;Ze-Hang Chen ,&nbsp;Daifen Chen","doi":"10.1016/j.fuel.2024.133675","DOIUrl":"10.1016/j.fuel.2024.133675","url":null,"abstract":"<div><div>Developing highly efficient thermodynamic cycles is of great importance in the area of distributed energy system, there are still many non-negligible problems on feasibility assessment and performance evaluation in the application of some emerging technologies, especially involving the fuel cells and carbon dioxide power cycles. This study proposes a distributed heat and power cogeneration system composed of a solid oxide fuel cell, a gas turbine, a steam Rankine cycle, a supercritical carbon dioxide Brayton cycle, and a heat exchanger. The system mathematical model is constructed, and the investigation on system energy, exergy, economic, environmental, and techno-economic performance is performed to demonstrate the technology’s feasibility and applicability. The simulation results indicate that the system can provide 367.03 kW of power and 58.02 kW of heating at the design point, and the overall electrical, exergetic, and energy efficiencies are 68.38 %, 72.41 %, and 79.19 %. The total cost rate of system is achieved to be 11.62 $/h with the system carbon dioxide emission and payback period being 0.2829 kg/kWh and 10.87 year. It can be concluded from the sensitivity analysis that the increases of the compressor pressure ratio, fuel flow rate, and SOFC inlet temperature contribute to improving the system electrical efficiency, while the carbon dioxide emission and the payback period can be reduced. Finally, multi-objective optimization of the cogeneration system is further performed to provide a strategy of performance improvement for system designers and decision makers. The optimization result indicates that though the system carbon emission is increased by 0.25 %, the system payback period and levelized cost of energy are obtained to be 9.88 year and 0.2836 kg/kWh, which are decreased by 9.11 % and 1.47 % compared to the design point.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"382 ","pages":"Article 133675"},"PeriodicalIF":6.7,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Gold nanocatalysts supported on Mono-/Mixed oxides for efficient synthesis of methyl methacrylate 支持单/混合氧化物的金纳米催化剂用于高效合成甲基丙烯酸甲酯
IF 6.7 1区 工程技术
Fuel Pub Date : 2024-11-17 DOI: 10.1016/j.fuel.2024.133763
Muhammad Umar Farooq , Rustem R. Zairov , Bassim Arkook , Moussab Harb , Mohamed M Makhlouf
{"title":"Gold nanocatalysts supported on Mono-/Mixed oxides for efficient synthesis of methyl methacrylate","authors":"Muhammad Umar Farooq ,&nbsp;Rustem R. Zairov ,&nbsp;Bassim Arkook ,&nbsp;Moussab Harb ,&nbsp;Mohamed M Makhlouf","doi":"10.1016/j.fuel.2024.133763","DOIUrl":"10.1016/j.fuel.2024.133763","url":null,"abstract":"<div><div>Developing sustainable methods for producing methyl methacrylate (MMA) has gained strategic importance for industrial applications and as a promising oxygenated fuel additive to enhance combustion efficiency and reduce emissions. This dual-purpose approach addresses both industrial needs and the growing demand for cleaner fuel solutions. Our study focuses on synthesizing gold nanoparticles (AuNPs) supported by alumina (Al<sub>2</sub>O<sub>3</sub>), cerium oxide (CeO<sub>2</sub>), and Al<sub>2</sub>O<sub>3</sub>/CeO<sub>2</sub> combination by deposition–-precipitation method, aiming to advance far-reaching MMA synthesis through direct oxidative esterification (DOE) of methacrolein (MAL) with methanol. The research explores the relationship between catalyst structure and activity, particularly investigating the impact of AuNPs doping on Al<sub>2</sub>O<sub>3</sub>, CeO<sub>2</sub>, and Al<sub>2</sub>O<sub>3</sub>/CeO<sub>2</sub> and the mechanism that promotes selective oxidation. The intimate interaction between CeO<sub>2</sub> and Al<sub>2</sub>O<sub>3</sub> and adequate doping of AuNPs with Al<sub>2</sub>O<sub>3</sub>/CeO<sub>2</sub> is beneficial in enhancing catalytic activity and facilitating selective oxidation. Notably, Au/Al<sub>2</sub>O<sub>3</sub>/CeO<sub>2</sub> demonstrated significantly higher catalytic activity compared to Au/Al<sub>2</sub>O<sub>3</sub> and Au/CeO<sub>2</sub> catalysts, achieving 98% MAL conversion and 95% MMA selectivity. The reaction yield, in particular, strongly correlated with surface and active oxygen species around AuNPs. This highly efficient catalytic process provides a green route for MMA production and enables its application as a sustainable fuel additive, contributing to improved engine performance and reduced environmental impact. The optimized catalyst system presents a viable pathway for both industrial chemical production and sustainable energy applications, addressing crucial environmental and energy challenges simultaneously.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"382 ","pages":"Article 133763"},"PeriodicalIF":6.7,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Highly efficient Zr-based coordination polymer for catalytic transfer hydrogenation of 5-hydroxymethylfurfural: Tuning acid strength and enhancing stability 用于催化 5-羟甲基糠醛转移加氢的高效 Zr 基配位聚合物:调节酸强度并提高稳定性
IF 6.7 1区 工程技术
Fuel Pub Date : 2024-11-17 DOI: 10.1016/j.fuel.2024.133745
Weizhen Xie , Yue Tang , Yiqiang Liu , Mengyuan Huang , Lu Lin , Xing Tang
{"title":"Highly efficient Zr-based coordination polymer for catalytic transfer hydrogenation of 5-hydroxymethylfurfural: Tuning acid strength and enhancing stability","authors":"Weizhen Xie ,&nbsp;Yue Tang ,&nbsp;Yiqiang Liu ,&nbsp;Mengyuan Huang ,&nbsp;Lu Lin ,&nbsp;Xing Tang","doi":"10.1016/j.fuel.2024.133745","DOIUrl":"10.1016/j.fuel.2024.133745","url":null,"abstract":"<div><div>In this study, Zr-based coordination polymers were synthesized via solvothermal method for the Meerwein-Ponndorf-Verley reduction of biomass-derived aldehydes and ketones. The morphology and strength of Lewis acid sites could be tuned by using different solvent during catalyst preparation. A 98.5 % yield of 2,5-bis(hydroxymethyl)furan (BHMF) was achieved at 100 °C using Zr-PDC/DMF-DCB, which was synthesized with pyridine-2,6-dicarboxylic acid (PDC) as ligand in a mixed solvent of N, N-dimethylformamide (DMF) and 1,2-dichlorobenzeneisopropanol (DCB) and exhibited moderate Lewis acid sites. Conversely,<!--> <!-->while Zr-PDC synthesized in alcohols (Zr-PDC/MeOH and Zr-PDC/EtOH) were used as catalysts, etherification products formed instead of BHMF. Further investigation into the role of solvents during catalyst preparation revealed that coordination between Zr sites and DMF increased the electron cloud density of Zr sites, thus weakening Lewis acidity. In addition, the inclusion of hydrophobic DCB resulted in the formation of spherical morphology, which improved resistance to carbon deposition and enhanced anti-agglomeration properties. This work presents a strategy for controlling acid strength and improving catalytic stability of coordination polymers.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"382 ","pages":"Article 133745"},"PeriodicalIF":6.7,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 insights into SO2-induced deactivation of Ni-based materials for integrated CO2 capture and methanation 二氧化硫诱导镍基材料失活的机理研究,用于二氧化碳捕集和甲烷化
IF 6.7 1区 工程技术
Fuel Pub Date : 2024-11-17 DOI: 10.1016/j.fuel.2024.133755
Xinlin Xie, Lei Liu, Hanzi Liu, Zhiqiang Sun
{"title":"Mechanistic insights into SO2-induced deactivation of Ni-based materials for integrated CO2 capture and methanation","authors":"Xinlin Xie,&nbsp;Lei Liu,&nbsp;Hanzi Liu,&nbsp;Zhiqiang Sun","doi":"10.1016/j.fuel.2024.133755","DOIUrl":"10.1016/j.fuel.2024.133755","url":null,"abstract":"<div><div>Dual functional materials (DFMs) for cyclic CO<sub>2</sub> capture and methanation exhibit significant potential in mitigating global climate change and achieving carbon neutrality. However, material deactivation caused by SO<sub>2</sub> poisoning presents a major challenge for its industrial applications. Herein, we tailored a kind of Ni-based DFM, and<!--> <!-->the sulfur poisoning effects on CO<sub>2</sub> adsorption and <em>in-situ</em> conversion were systematically investigated. The experimental results reveal a striking inverse relationship between SO<sub>2</sub> concentration, CO<sub>2</sub> capture capacity, and methane yield. Increasing SO<sub>2</sub> concentration promotes the form of stable sulfate species and undecomposable, lower CO<sub>2</sub> capture capacity which further decreases methane yield with the rate of decrease in methane yield rising sharply from 7.14 % to 85.71 % as the SO<sub>2</sub> concentration increases from 100 ppmv to 1000 ppmv, compared to the methane yield in the absence of SO<sub>2</sub>. Physicochemical characterizations demonstrate that SO<sub>2</sub> accumulates on the surface of DFM, initially forming sulfite and oxidizing to sulfate during the CO<sub>2</sub> adsorption process. Furthermore, sulfur poisoning accelerates the oxidation of metallic Ni to Ni<sup>2+</sup> after cyclic reactions, which suppresses high-temperature basic sites and surface oxygen vacancies of DFM. <em>In-situ</em> DRIFT studies reveal that the deposited sulfate remains stable during H<sub>2</sub> reduction at 340°C, contributing to the decomposition of formate intermediates and ultimately leading to a decrease in methane production.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"382 ","pages":"Article 133755"},"PeriodicalIF":6.7,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Engineering noble metal-free nickel catalysts for highly efficient liquid fuel production from waste polyolefins under mild conditions 设计不含贵金属的镍催化剂,在温和条件下利用废弃聚烯烃高效生产液体燃料
IF 6.7 1区 工程技术
Fuel Pub Date : 2024-11-17 DOI: 10.1016/j.fuel.2024.133733
Xinlei Han, Jiuxuan Zhang, Zhengyan Qu, Tuo Ji, Feng Zeng, Hong Jiang, Jun Huang, Zhenchen Tang, Weihong Xing, Rizhi Chen
{"title":"Engineering noble metal-free nickel catalysts for highly efficient liquid fuel production from waste polyolefins under mild conditions","authors":"Xinlei Han,&nbsp;Jiuxuan Zhang,&nbsp;Zhengyan Qu,&nbsp;Tuo Ji,&nbsp;Feng Zeng,&nbsp;Hong Jiang,&nbsp;Jun Huang,&nbsp;Zhenchen Tang,&nbsp;Weihong Xing,&nbsp;Rizhi Chen","doi":"10.1016/j.fuel.2024.133733","DOIUrl":"10.1016/j.fuel.2024.133733","url":null,"abstract":"<div><div>Polyolefin wastes, while posing environmental threats, also offer potential as carbon feedstocks. Hydroconversion techniques show promise in direct transforming polyolefin wastes into liquid fuels, yet practicality is impeded by the prohibitive cost of noble metal-based catalysts or the inferior performance of base metal alternatives. This study introduces a bifunctional 0.5Ni/Beta catalyst, featuring fine Ni nanoparticles (3 nm, 0.5 wt% loading) on Beta zeolite, as a highly efficient catalyst for liquid fuel production from diverse polyolefins. This catalyst achieves a notable production rate of 1643 g<sub>liquid</sub>∙g<sub>Ni</sub><sup>−1</sup>∙h<sup>−1</sup> and over 86 % selectivity to liquid fuels (C<sub>5-20</sub>) under 280 °C, surpassing state-of-the-art noble-metal-free catalysts. Ni particle size controlled by chelators, along with the ratio of Ni to Brønsted acid sites, emerged as crucial performance descriptors. Precise control over the loading of fine Ni nanoparticles (∼1%), not only enhances (de)hydrogenation function but also effectively maintains the Brønsted acidity of Beta zeolites. The Ni/Beta catalyst exhibits resistance to coke deposition and tolerance to various typical impurities, showing promise in practical implementation. This noble metal-free Ni/Beta thus represents an evolving generation of catalyst, propelling sustainable liquid fuel production from plastic wastes.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"382 ","pages":"Article 133733"},"PeriodicalIF":6.7,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 functional fluorine (F)-containing oxidiser of nano-networked NH4CuF3 to improve the combustion efficiency of Al powder 纳米网络化 NH4CuF3 的含氟 (F) 功能氧化剂可提高铝粉的燃烧效率
IF 6.7 1区 工程技术
Fuel Pub Date : 2024-11-17 DOI: 10.1016/j.fuel.2024.133564
Xiandie Zhang, Haozhe Li, Xuxu Cui, Weiduo Fei, Xinwen Ma, Jiaming Liu, Pingyun Li, Xiaode Guo, Xiang Zhou
{"title":"A functional fluorine (F)-containing oxidiser of nano-networked NH4CuF3 to improve the combustion efficiency of Al powder","authors":"Xiandie Zhang,&nbsp;Haozhe Li,&nbsp;Xuxu Cui,&nbsp;Weiduo Fei,&nbsp;Xinwen Ma,&nbsp;Jiaming Liu,&nbsp;Pingyun Li,&nbsp;Xiaode Guo,&nbsp;Xiang Zhou","doi":"10.1016/j.fuel.2024.133564","DOIUrl":"10.1016/j.fuel.2024.133564","url":null,"abstract":"<div><div>Aluminium (Al) powder is the most common solid fuel component in metastable intermolecular composites (MICs). It is used in the field of propellants to provide energy for the flight of rockets and missiles. However, the passivation layer overlaying its surface hinders its energy release. Using fluorine (F)-containing oxidisers may etch the passivation layer, enabling Al to achieve a more direct redox process and improving its energy-release capacity. Herein, NH<sub>4</sub>CuF<sub>3</sub>, which has nano-network structure, was synthesised through the solvo-thermal method, and n-Al was filled into the nano-pore channels using a simple ultrasonic mixing method to form a new n-Al/NH<sub>4</sub>CuF<sub>3</sub> MICs with excellent dispersion and interfacial contact. The thermal decomposition process of NH<sub>4</sub>CuF<sub>3</sub> was investigated, and the results showed that NH<sub>4</sub>CuF<sub>3</sub> could release hydrogen fluoride (HF) and ammonia (NH<sub>3</sub>) gaseous products. The passivation layer on the surface of the Al powder was etched by HF, and the abundance of gaseous products during the reaction of n-Al/NH<sub>4</sub>CuF<sub>3</sub> Extended the combustion region. This can enhance air capture in the reaction system, minimise reaction sintering and aid in performing external work. Furthermore, n-Al/NH<sub>4</sub>CuF<sub>3</sub> exhibits a lower onset reaction temperature, shorter ignition delay time and greater external work ability than n-Al/CuF<sub>2</sub> and n-Al/CuO.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"382 ","pages":"Article 133564"},"PeriodicalIF":6.7,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Enhancing photocatalytic H2 evolution of Cd0.5Zn0.5S with the synergism of amorphous CoS cocatalysts and surface S2− adsorption 非晶 CoS 协同催化剂与表面 S2- 吸附的协同作用增强了 Cd0.5Zn0.5S 的光催化 H2 演化能力
IF 6.7 1区 工程技术
Fuel Pub Date : 2024-11-17 DOI: 10.1016/j.fuel.2024.133737
Longxin Hu , Xing Liu , Rui Dai , Hua Lai , Junhua Li
{"title":"Enhancing photocatalytic H2 evolution of Cd0.5Zn0.5S with the synergism of amorphous CoS cocatalysts and surface S2− adsorption","authors":"Longxin Hu ,&nbsp;Xing Liu ,&nbsp;Rui Dai ,&nbsp;Hua Lai ,&nbsp;Junhua Li","doi":"10.1016/j.fuel.2024.133737","DOIUrl":"10.1016/j.fuel.2024.133737","url":null,"abstract":"<div><div>Designing surface phase is an efficient strategy to facilitate charge separation and photocatalytic H<sub>2</sub>-evolution performance. In this work, CoS cocatalysts were intimately anchored on Cd<sub>0.5</sub>Zn<sub>0.5</sub>S (denoted as CZS) photocatalyst via in-situ precipitate transformation in S<sup>2−</sup>/SO<sub>3</sub><sup>2−</sup> solution with cobaltous phosphate (CoPi) as a precursor, meanwhile, S<sup>2−</sup> ions were adsorbed on the CZS to form a sulfur-rich surface (denoted as CZS-S). The photocatalytic H<sub>2</sub>-evolution rate of CoS/CZS-S is 2.02 mmol·g<sup>−1</sup>·h<sup>−1</sup> in 0.1 M Na<sub>2</sub>S/Na<sub>2</sub>SO<sub>3</sub> sacrificial agent system. In addition, CoS/CZS-S exhibits excellent stability in both Na<sub>2</sub>S/Na<sub>2</sub>SO<sub>3</sub> and lactic acid system. The theoretical calculations (DFT) and experimental results reveal that amorphous CoS can work as a highly effective cocatalyst for H<sub>2</sub> evolution reaction and the intimate contact between CZS and CoS facilitates the photoelectrons transfer from CZS to CoS. The adsorbed S<sup>2−</sup> ions mainly work as effective hole acceptors. As a result of the synergism of CoS and adsorbed S<sup>2−</sup> ions, the boosted separation and immigration of photoelectrons and photoholes and high photocatalytic H<sub>2</sub>-evolution performance of CoS/CZS-S are realized. The present work highlights simultaneous reinforcing reduction and oxidation half-reaction dynamics via a facile and economic surface strategy to achieve efficient solar H<sub>2</sub>-evolution from H<sub>2</sub>O splitting.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"382 ","pages":"Article 133737"},"PeriodicalIF":6.7,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654502","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Mechanisms of pore structure evolution during coal heating: Insights from the size and direction of aromatic rings 煤炭加热过程中孔隙结构演变的机理:从芳香环的大小和方向看问题
IF 6.7 1区 工程技术
Fuel Pub Date : 2024-11-16 DOI: 10.1016/j.fuel.2024.133601
Li Yuanji , Dai Chengxin , Zhang Penglin , Zhang Qiang
{"title":"Mechanisms of pore structure evolution during coal heating: Insights from the size and direction of aromatic rings","authors":"Li Yuanji ,&nbsp;Dai Chengxin ,&nbsp;Zhang Penglin ,&nbsp;Zhang Qiang","doi":"10.1016/j.fuel.2024.133601","DOIUrl":"10.1016/j.fuel.2024.133601","url":null,"abstract":"<div><div>Coalbed methane (CBM) is stored and transported in coal pores, and the size, shape, and connectivity of coal pores directly affect the CBM endowment state and transport process, which have direct implications for gas disaster prevention and CBM mining. However, previous studies on the characterization and genesis of coal nanopores have mainly focused on mineral composition and molecular structure, paying relatively little attention to the effect of the size and directionality of aromatic structures on pore formation. This study determined the nanopore characteristics and the relationship of coal nanopores with aromatic ring size and ordering. To this end, coal samples of different maturity levels, which were obtained through heating under an open-exchange system, were analyzed through Scanning Electron Microscopy, Mercury Intrusion Porosimetry, Low Temperature Nitrogen Adsorption, and High-Resolution Transmission Electron Microscope. The results showed that the pores transitioned from organic matter pores to microfractures with the increase of coal maturity. Moreover, the size of aromatic rings gradually increases and the directionality is also gradually enhanced. The diameter of pores with the smallest throat gradually decreases with the increase of the coal rank, and the volume of mesopores exhibits a trend of initial increase followed by a decrease. The volume of macropores exhibits a trend of initial slow increase followed by a rapid increase with the rise of coal rank. The average fractal dimension of macropores decreases with increasing coal maturity, indicating that the non-homogeneity of pore structure gradually decreases and the pore-fracture system tends to homogenize. The average fractal dimension of mesopores shows a fluctuating change trend of low–high-low–high with the increase of coal rank. The relationship between aromatic ring sizes and nanopores shows that pores of 2–9 nm may be controlled by aromatic rings of 5.5–14.4 Å, and 9–10 nm pores may be controlled by 5.5–7.4 Å and 7.5–11.4 Å aromatic rings. The control of 10–15 nm pores is unclear, and 15–50 nm pores may be controlled by 3.0–5.4 Å aromatic rings.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"382 ","pages":"Article 133601"},"PeriodicalIF":6.7,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Modeling, optimization, and system evaluation of ammonia production processes by direct chemical looping of petroleum coke/coal 石油焦/煤直接化学循环合成氨生产工艺的建模、优化和系统评估
IF 6.7 1区 工程技术
Fuel Pub Date : 2024-11-16 DOI: 10.1016/j.fuel.2024.133668
Yingying Xia , Chenhong Wu , Bingqian Ling , Dong Xiang
{"title":"Modeling, optimization, and system evaluation of ammonia production processes by direct chemical looping of petroleum coke/coal","authors":"Yingying Xia ,&nbsp;Chenhong Wu ,&nbsp;Bingqian Ling ,&nbsp;Dong Xiang","doi":"10.1016/j.fuel.2024.133668","DOIUrl":"10.1016/j.fuel.2024.133668","url":null,"abstract":"<div><div>Petroleum coke, a by-product of oil refining, is characterized by high carbon content and calorific value. The combustion of petroleum coke releases substantial amounts of CO<sub>2</sub>, posing significant environmental challenge. Chemical looping is a promising technology due to its inherent carbon capture advantage. In this study, the chemical looping ammonia processes with 85 % and 95 % of petroleum coke conversion rates are established. Additionally, a chemical looping ammonia system co-fueled by petroleum coke and coal with a 95 % conversion rate is designed. After detailed modeling and key parameters optimization for the above processes, exergy efficiency and life cycle greenhouse gas emissions are calculated to analyze their performance. The results show that the exergy efficiencies of the three chemical looping ammonia systems are 47.55 %, 53.39 %, and 51.06 %, corresponding to greenhouse gas emissions of 428, 349, and 381 kg CO<sub>2</sub>-eq/t NH<sub>3</sub>. Enhancing petroleum coke conversion rate and employing the co-feeding chemical looping process can significantly improve the system’s exergy efficiency and reduce greenhouse gas emissions, thus providing a promising pathway for the clean and efficient utilization of petroleum coke.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"382 ","pages":"Article 133668"},"PeriodicalIF":6.7,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Improved CO tolerance of Pt nanoparticles on polyaniline-modified carbon for PEMFC anode 用于 PEMFC 阳极的聚苯胺改性碳上铂纳米粒子对 CO 的耐受性得到改善
IF 6.7 1区 工程技术
Fuel Pub Date : 2024-11-16 DOI: 10.1016/j.fuel.2024.133239
Xuzhao Shi , Wei Song , Tao Wei , Kui Zhang , Zhigang Shao
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