Fuel最新文献

{"title":"Borides and sulfide quantum dots co-enhanced the electrochemical property of metal organic framework/Ni3S2 composites for high-performance supercapacitors","authors":"Shuai Wu ,&nbsp;Debin Cai ,&nbsp;Hong Wang ,&nbsp;Rui Zhou ,&nbsp;Li Guo ,&nbsp;Yanzhong Wang","doi":"10.1016/j.fuel.2024.133805","DOIUrl":"10.1016/j.fuel.2024.133805","url":null,"abstract":"<div><div>Metal organic frameworks (MOFs) as supercapacitor electrode materials still faces low electronic conductivity and poor structural stability. Herein, metal sulfides@NiCo-MOF composites were first synthesized via one-pot solvothermal method and then controllably boronized by using NaBH₄ to modulate its morphology and electronic structure. The morphology of metal sulfides@NiCo-MOFs is transformed from the original columnar structure into ultrathin nanoflakes after boronization, and B also optimizes the number of oxygen vacancies. Benefiting from the formation of Co-B-Ni bonds and abundant active sites, the as-prepared borides and sulfides quantum dots@NiCo-MOF/Ni₃S₂-2 (BSQD@MOF/S-2) composites exhibit high specific capacitance of 4230.7F g⁻¹ at 1 A g⁻¹. Additionally, the fabricated ASC device achieves an energy density of 69.2 Wh kg⁻¹ at 410.6 W kg⁻¹. The density functional theory (DFT) calculations show that boron forms p-d hybrid orbitals with transition metals after filling oxygen vacancies, which can improve the electronic conductivity and favorite the adsorption capacitance. This paper proposes a mild method to optimize the morphology and electronic structure of MOFs-based materials for high-performance supercapacitors.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"382 ","pages":"Article 133805"},"PeriodicalIF":6.7,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700998","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}

{"title":"A method for hydrogen-enriched syngas production from biomass via induction heating","authors":"Maxim V. Penzik ,&nbsp;Shu Zhang ,&nbsp;Vladislav V. Badenko ,&nbsp;Bin Li ,&nbsp;Alexander N. Kozlov","doi":"10.1016/j.fuel.2024.133817","DOIUrl":"10.1016/j.fuel.2024.133817","url":null,"abstract":"<div><div>We propose a method for production of syngas with different H₂ to CO ratios from biomass via induction heating in a quartz reactor. To transfer heat to the biomass, iron filings or steel balls were added and evenly distributed in the biomass bed. In the case when iron filings were used, the molar ratio of H₂ to CO was 2.3:1, while the use of steel balls reduced this ratio to 1:1.4, resulting in a 22 mol.% increase in gas yield. An extra layer of iron filings located in the induction heating area above the mixture of biomass and steel balls facilitated partial decomposition of the heavy tar, increasing the yield of gaseous products by another 20.7 mol.% with the molar ratio of H₂ to CO reaching 1.6:1. Secondary reactions of volatile compounds on the surface of iron filings resulted in the formation of p-xylene and o-xylene. The composition of gaseous and liquid pyrolysis products was investigated by GC and GC–MS.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"382 ","pages":"Article 133817"},"PeriodicalIF":6.7,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142701853","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}

{"title":"A chemical kinetic analysis of knock propensity of methanol-to-gasoline fuel","authors":"James MacDonald ,&nbsp;Dario Lopez-Pintor ,&nbsp;Naoyoshi Matsubara ,&nbsp;Koji Kitano ,&nbsp;Ryota Yamada","doi":"10.1016/j.fuel.2024.133787","DOIUrl":"10.1016/j.fuel.2024.133787","url":null,"abstract":"<div><div>Production of low carbon gasoline-like fuels such as methanol-to-gasoline (MTG) is a promising approach to achieve rapid greenhouse gas emission reduction of the transportation sector. Despite the fact that gasoline that meets the ASTM D4814 standard for automotive spark-ignition engine fuel can be readily produced from these processes, it is unclear how the composition of MTG may affect engine performance and emissions. In this paper, a surrogate for an MTG is used to numerically study the effects of gasoline composition on knock propensity and on the sensitivity of knock to thermal and fuel stratification, to oxygen dilution and to nitric oxide from exhaust gas recirculation of residual gases.</div><div>Simulations were performed in ANSYS CHEMKIN-PRO using a comprehensive chemical kinetic mechanism for gasoline surrogates, and results of the MTG surrogate were compared against those of a petroleum-based regular E10 gasoline, termed PACE-20. A premium-grade MTG fuel was also formulated by adding ethanol to the MTG surrogate, and results were compared against those of four premium-grade, gasoline-like fuels representative of future alternative gasoline formulations. Surrogates and mechanism were evaluated by comparison against experimental engine data, and the model showed high accuracy at stoichiometric conditions (mean absolute error of ignition timing equal to 1.46 crank angle degrees) but larger deviations at lean conditions (mean absolute error of ignition timing equal to 5.52 crank angle degrees). Despite the fact that the MTG surrogate has a RON 1.1 units higher than that of PACE-20, it may show higher knock propensity at medium temperature conditions due to a less intense NTC behavior. MTG autoignition was more temperature- and equivalence ratio-sensitive than that of PACE20, suggesting that MTG can benefit more from naturally-occurring thermal stratification or from induced fuel stratification of the end gas to mitigate knock intensity. The sensitivity of autoignition reactivity to oxygen dilution and to NO concentration was higher for MTG than for regular gasoline at medium loads, but the opposite trend was observed at high loads due to the effect of pressure on the low-temperature chemistry of regular gasoline. Approximately 14 %_vol ethanol content was required to upgrade the octane rating of MTG from regular grade to premium grade. Adding 13.6 %_vol ethanol made the fuel autoignition less sensitive to both oxygen dilution and NO content (ignition time varies approx. 17 % and 50 % less with oxygen dilution and NO addition, respectively, when adding ethanol at high engine loads).</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"382 ","pages":"Article 133787"},"PeriodicalIF":6.7,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142701848","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}

{"title":"Experimental and modeling study on the effects of dimethyl methylphosphonate addition on CH4/air and C3H8/air laminar premixed flames","authors":"Haizhong Guan,&nbsp;Yindong Song,&nbsp;Yongjie Jiao,&nbsp;Zhixin Zhang,&nbsp;Lei Wang","doi":"10.1016/j.fuel.2024.133686","DOIUrl":"10.1016/j.fuel.2024.133686","url":null,"abstract":"<div><div>The present study aimed to address the limitations of existing kinetic mechanisms for dimethyl methylphosphonate (DMMP) by experimental measurements and kinetic optimization. Some new experimental data on laminar flame speeds of CH₄/air and C₃H₈/air mixtures doped with DMMP are obtained through the heat flux method, particularly in the rich combustion region where data are previously scarce. The results verify that, as the equivalence ratio increases, the inhibitory efficiency of DMMP decreases for methane and propane flames, but gradually increases for hydrogen flames. Subsequently, a new optimized DMMP mechanism is proposed utilizing the particle swarm algorithm to adjust the pre-exponential factors of 26 P-containing reactions within their uncertainty domains. The results demonstrate that the optimized mechanism not only improves the laminar flame speed of the DMMP-doped hydrocarbon flames (H₂, CH₄, and C₃H₈) in the stoichiometric and rich regions, but also improves the description of ignition delay time for the lean H₂/DMMP and the rich CH₄/DMMP mixtures. In addition, the updated model shows moderate to significant improvements in species concentration predictions, particularly in reproducing the CO yield during DMMP oxidation in Shock Tube, the HOPO of DMMP pyrolysis in Jet-Stirred Reactor, and the H-radicals of doped premixed flame in Flat Burner. In summary, the updated model offers a more comprehensive and accurate portrayal of the existing measurements including the laminar flame speed, ignition delay time, and species concentration.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"382 ","pages":"Article 133686"},"PeriodicalIF":6.7,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700993","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}

{"title":"Fabrication of core-shell Ag@CD oxygen reduction catalyst under ultraviolet irradiation using carbon dot as reducing agents","authors":"Min Sun ,&nbsp;Siyu Chu ,&nbsp;Yifan Ma ,&nbsp;Xuzhe Wang ,&nbsp;Zijiong Li","doi":"10.1016/j.fuel.2024.133783","DOIUrl":"10.1016/j.fuel.2024.133783","url":null,"abstract":"<div><div>The widespread applications of fuel cell depend on the reasonable designment of excellent catalysts that are easy to synthesize or abundant in reserves for oxygen reduction reaction (ORR). The application of precious metal catalysts (such as Pt, Pd etc.) is limited due to their scarcity of resources and high cost, while Ag/C catalysts have shown unique advantages in fuel cell and are expected to replace precious metal catalysts. In this paper, the fabrication of core–shell Ag@carbon dot (Ag@CD) with varying Ag loadings was achieved through a one-step method utilising CD as both a reducing agent and stabiliser, with the assistance of ultraviolet (UV) irradiation. Its suitable silver salt concentration and stable core–shell structure are the fundamental reasons for the excellent catalytic performance of ORR. The results show that the limiting current density (5.8 mA cm⁻²) of [email protected] catalyst is much greater than that of [email protected] and [email protected] catalysts. The Tafel slope of [email protected] catalyst is almost equivalent to those for Pt/C catalysts, suggesting the [email protected] exhibits an outstanding catalytic activity. The relative current density of [email protected] catalyst only decreased by 2.5 % after 50,000 s, suggesting that [email protected] exhibits more excellent stability for ORR, which is ascribing to the carbon layer coated outside the Ag nanoparticles (NPs).</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"382 ","pages":"Article 133783"},"PeriodicalIF":6.7,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142701850","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}

{"title":"Effect of combustion chamber geometry on performance and emissions of direct injection hydrogen engines","authors":"Lezhen Li ,&nbsp;Zhaolei Zheng ,&nbsp;Shunlu Rao ,&nbsp;Qian Li ,&nbsp;Xuelin Tang ,&nbsp;Wei Deng","doi":"10.1016/j.fuel.2024.133500","DOIUrl":"10.1016/j.fuel.2024.133500","url":null,"abstract":"<div><div>Using hydrogen in internal combustion engines (ICEs) not only reduces CO₂ emissions but also leverages the high technological maturity of ICEs for rapid popularization, making it a very promising method. However, hydrogen ICEs face the challenge of high NO_X emissions. Optimizing the combustion chamber geometry can significantly improve the mixing quality of the fuel–air mixture, thereby increasing combustion stability and reducing original NO_X emissions. This paper discusses in detail the effects of five different chamber geometries on performance and emissions in a direct-injection spark-ignition hydrogen engine under ultra-lean conditions. The research results indicate that the nebular spiral arm structure of the nebular combustion chamber divides the large-scale vortex in the cylinder into several vortices, guiding the collision between different vortices or colliding with other walls of the combustion chamber. By enhancing the gas flow in the cylinder at the end of the compression stroke, the reasonable mixture concentration distribution and TKE distribution are achieved, thus showing the best combustion performance The eccentric hemispherical combustion chamber (EHCC), with its offset hemispherical structure, achieves stratified mixing and combustion effects with high concentration at the cylinder center and low concentration around the periphery. However, due to the weaker TKE of the mixture, the combustion performance of the EHCC is slightly inferior to that of the NECC. Compared to the initial combustion chamber (INCC), the NECC expands the excess air coefficient corresponding to the lean-burn limit from 2.52 to 2.91. Furthermore, at λ = 2.5, the NECC achieves both high thermal efficiency (46.2 %) and nearly zero emissions.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"382 ","pages":"Article 133500"},"PeriodicalIF":6.7,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700996","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}

{"title":"Study on the slurry ability of low-rank coal blended with alkali-modified sludge","authors":"Xiaofang You ,&nbsp;Wenqi Zhang ,&nbsp;Xiaoteng Li ,&nbsp;Chuandong Ma ,&nbsp;Zhisen Li ,&nbsp;Qingbiao Wang ,&nbsp;Zhenhua Wang ,&nbsp;Lin Li","doi":"10.1016/j.fuel.2024.133771","DOIUrl":"10.1016/j.fuel.2024.133771","url":null,"abstract":"<div><div>In this study, alkali-modified municipal sludge (AS) was mixed with low-rank coal to prepare AS-coal water slurry (ASCWS). The influence of AS on the slurrying performance of coal water slurry (CWS) was investigated, and the slurrying mechanism of municipal sludge-CWS (SCWS) was elucidated. Research on the alkali modification of municipal sludge showed that the effectiveness of the modifiers was in the order Ca(OH)₂ &gt; NaOH &gt; KOH &gt; K₂CO₃. Considering the apparent viscosity of the slurry as the evaluation criterion, the optimal alkali modification scheme was determined through the response surface optimization test, and 19.99 % Ca(OH)₂ was suitable to modify the sludge for 14.61 h Compared with the unmodified sludge, the content of oxygen-containing functional groups on the surface of AS was reduced, and the flocculent structure was disrupted, which helped improve the slurry formation performance of the SCWS. Blending the sludge with the CWS enhanced the stability of the slurry, and the water separation rates for the SCWS and ASCWS decreased from 18.62 % to 5.00 % and 5.26 %, respectively. The mechanism study showed that the zeta potential values of SCWS and ASCWS decreased from −10.67 mV to –32.23 mV and −39.22 mV, respectively. The increased electronegativity of the slurry owing to the addition of sludge facilitated particle dispersion and enhanced slurry stability. The adsorption patterns of sodium poly[(naphthaleneformaldehyde)sulfonate] (MF) on coal, sludge, and modified sludge were consistent with the Langmuir adsorption model. The pseudo-second-order kinetic model accurately described the adsorption process of MF on coal, sludge, and modified sludge.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"382 ","pages":"Article 133771"},"PeriodicalIF":6.7,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142701851","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}

{"title":"Oxy-Fuel combustion in an entrained flow reactor for regeneration of spent Calcium Looping sorbents","authors":"Nico Mader ,&nbsp;Borja Arias ,&nbsp;Jörg Maier ,&nbsp;Günter Scheffknecht","doi":"10.1016/j.fuel.2024.133784","DOIUrl":"10.1016/j.fuel.2024.133784","url":null,"abstract":"<div><div>Calcium Looping (CaL) is one of the most promising technologies for large-scale CO₂ capture of flue gases from power plants and industrial processes. A Ca-based sorbent, mostly CaO derived from limestone, is used to capture CO₂ in the first step, while being regenerated in the second step. The aim of this study was to investigate the regeneration step of a novel CaL concept, which uses Ca(OH)₂ as CO₂ capture sorbent for backup power plants (“BackCap” concept). The spent sorbent after CO₂ capture was calcined in an entrained flow reactor, using oxy-fuel conditions. In particular, the calcination degrees of the sorbent that were reached during a few seconds residence time in the reactor, were of main interest in this study. Therefore, experiments including parameter variations were carried out in a drop-tube and an entrained flow reactor to calcine the carbonated Ca(OH)₂ particles. Calcination degrees of almost 0.6 were reached within the test facility used, while calcining in short residence times (i.e. &lt;5 s) under oxy-fuel conditions. The experimental results obtained were implemented into a calcination model, indicating that full calcination of particles under oxy-fuel conditions is possible within reasonable residence time (i.e. 10 s).</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"381 ","pages":"Article 133784"},"PeriodicalIF":6.7,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142747383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ni transformation and hydrochar properties during hydrothermal carbonization of cellulose","authors":"Peng Zhao ,&nbsp;Shijie Yu ,&nbsp;Ye Shui Zhang ,&nbsp;Heng Cheng ,&nbsp;Xiaoxiao Yang ,&nbsp;Qinghai Li ,&nbsp;Yanguo Zhang ,&nbsp;Hui Zhou","doi":"10.1016/j.fuel.2024.133772","DOIUrl":"10.1016/j.fuel.2024.133772","url":null,"abstract":"<div><div>The harm of heavy metals to the environment and human health has become a major concern due to their high toxicity, ease of accumulation in the human body, and resistance to degradation. In particular, Ni is widely used in various industrial and consumer products, which is a toxic pollutant posing great harm to humanity and the environment. Hydrothermal carbonization has broad prospects for reducing the ecological toxicity of heavy metals. However, the effects and mechanisms of hydrothermal carbonization conditions on the stabilization of heavy metals still need to be further explored. This research aimed to explore Ni migration and transformation within cellulose throughout the hydrothermal carbonization process. The results indicated that hydrothermal carbonization facilitated the immobilization of heavy metals due to the generation of hydrochars with complex surface structures. In addition, the hydrothermal carbonization process significantly decreased the weakly bound parts of Ni, thereby reducing the environmental risk of Ni. The optimal conditions for the hydrothermal carbonization process of cellulose added with Ni were 250 ℃ and 90 min. However, further increasing the reaction temperature or retention time resulted in negligible or even negative effects on Ni immobilization. In general, this study proposed possible mechanisms for the effects of hydrothermal carbonization on the migration and immobilization of heavy metals, which may provide insights into handling heavy metals in biomass.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"382 ","pages":"Article 133772"},"PeriodicalIF":6.7,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142701849","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}

{"title":"Insight into NH3-SCR and H2O/SO2 resistance of Ce modified iron-based catalysts with the presence of arsenic","authors":"Mengyao Gu ,&nbsp;Shihao Guo ,&nbsp;Zhongpu Xiong ,&nbsp;Juan Chen ,&nbsp;Hong Yao","doi":"10.1016/j.fuel.2024.133725","DOIUrl":"10.1016/j.fuel.2024.133725","url":null,"abstract":"<div><div>The mechanism of denitrification and arsenic poisoning during the selective catalytic reduction of NO_x with ammonia using a cerium-modified iron-based catalyst was investigated through fixed bed activity tests and catalyst characterization. The results demonstrated that cerium formed a solid solution with Fe, and enriched the surface acid sites of the catalyst. Furthermore, cerium inhibited the arsenic-iron interaction, thereby protecting the active sites of the catalyst. After 6 h of arsenic poisoning, the NO_x conversion of 0.1Ce catalyst decreased by only about 30 % of that of Fe₂O₃ catalyst. The cerium-modified iron-based catalyst exhibited significantly better H₂O resistance than the Fe₂O₃ catalyst at 300 °C, and increased as the temperature rose·H₂O adsorbed onto the Lewis acid sites on the catalyst surface, converting them into Brønsted acid sites, which promoted arsenic adsorption and oxidation on the surface, thereby greatly reducing adsorption activity of the catalyst. In the presence of SO₂ and As₂O₃ in the flue gas, the denitrification efficiency of the catalyst further decreased, though the reduction is less pronounced than in the presence of H₂O and As₂O₃ alone, and shows a negative correlation with SO₂ concentration.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"382 ","pages":"Article 133725"},"PeriodicalIF":6.7,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142701852","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}