Xing Ning, Xiaole Huang, Xiangyu Xue, Chang'an Wang, Lei Deng, Defu Che
{"title":"Experimental study on yield and quality of tar from tar-rich coal under the simulated in-situ conditions","authors":"Xing Ning, Xiaole Huang, Xiangyu Xue, Chang'an Wang, Lei Deng, Defu Che","doi":"10.1016/j.joei.2024.101912","DOIUrl":"10.1016/j.joei.2024.101912","url":null,"abstract":"<div><div>Tar-rich coal has a great potential to extract a large body of liquid fuels through thermal treatment. To investigate the effects of <em>in-situ</em> conditions on both the yield and the quality of the tar from tar-rich coal during pyrolysis, an experimental system in which the <em>in-situ</em> conditions can be simulated was built. The simulated conditions included <em>in-situ</em> stress, pyrolysis temperature, heating rate, and moisture content. Furthermore, the underlying mechanisms of <em>in-situ</em> conditions on the tar from tar-rich coal were revealed. The tar yield is increased from 0.83 % to 10.13 % in the temperature range of 200–500 °C, but a considerable drop of the yield occurs around 600 °C due to the cracking of the tar. The heating rate is decreased from 16 °C/min to 2 °C/min, the tar yield is increased from 4.63 % to 10.30 %. At low heating rates, the tar yield can be boosted during the <em>in-situ</em> pyrolysis, in contrast to the high heating rate required in conventional coal pyrolysis. Based on the variations in the average activation energy of pyrolysis kinetic under <em>in-situ</em> conditions, the <em>in-situ</em> pyrolysis can easily form the active free radicals in tar-rich coal but difficultly promote the reactions in the formed active free radicals. The decomposition of the bridge bonds in aromatic, the –CH<sub>2</sub>/–CH<sub>3</sub> in aliphatic, the oxygen-containing functional group, and the hydrogen-bonded-OH group for tar-rich coal under <em>in-situ</em> conditions is conducive to producing the high-value tar. The low ratio of chain hydrocarbons to aromatic hydrocarbons and the decreased relative content of oxygenated compounds in the tar under <em>in-situ</em> conditions improve the tar quality. Compared with the tar from tar-rich coal under the conventional pyrolysis, the tar under the <em>in-situ</em> pyrolysis is rich in light oil. This study provides the better understanding of the effects of <em>in-situ</em> conditions on tar from tar-rich coal, and also guides the <em>in-situ</em> pyrolysis of coal to extract high-value tar in applications.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"118 ","pages":"Article 101912"},"PeriodicalIF":5.6,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142756928","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}
Zhenkun Guo , Mengyuan Liu , Haocheng He , Feiran Song , Xiaofeng Chen , Fanhui Guo , Juan Chen , Shijian Lu , Shuxun Sang , Jianjun Wu
{"title":"Co-pyrolysis and co-combustion characteristics of low-rank coal and waste biomass: Insights into interactions, kinetics and synergistic effects","authors":"Zhenkun Guo , Mengyuan Liu , Haocheng He , Feiran Song , Xiaofeng Chen , Fanhui Guo , Juan Chen , Shijian Lu , Shuxun Sang , Jianjun Wu","doi":"10.1016/j.joei.2024.101918","DOIUrl":"10.1016/j.joei.2024.101918","url":null,"abstract":"<div><div>This study delves into the investigation of the co-pyrolysis, co-combustion characteristics, and kinetic behaviors of straw and low-rank coal, aiming to inform strategies for their optimal combustion as potential solid fuels. As the biomass proportion increases, the synergistic effect during co-pyrolysis gradually diminishes. The addition of straw char into coal char notably enhances the ignitability and combustibility of coal char. In the co-combustion process, both synergistic and antagonistic effects (Interaction index varies from −13.52 kJ⋅mol<sup>−1</sup> to 12.62 kJ⋅mol<sup>−1</sup>) exist between carbonized straw and coal char, while the synergistic effect was dominant. The first-order chemical reaction (O<sub>1</sub>) and diffusion-controlled reaction (D<sub>3</sub> and D<sub>4</sub>) are the most effective mechanisms (all the correlation coefficient R<sub>2</sub> > 0.97) for the co-combustion process. The proportion of straw char in the blend is recommended to be maintained at 20 wt% because of the lowest total combustion activation energy (92.35 kJ⋅mol<sup>−1</sup>) and the most pronounced synergistic effect (Interaction index ΔX = 13.6). These findings offer valuable theoretical guidance for promoting the sustainable utilization of low-rank coal and biomass waste resources, fostering a more eco-friendly and efficient energy landscape.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"118 ","pages":"Article 101918"},"PeriodicalIF":5.6,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142746552","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}
Yongzheng Wang, Bo Liang, Yanjie Liang, Wenjie Fan, Jisen Liu, Shengli Niu, Kuihua Han
{"title":"Investigation on the mechanism of ash deposition formation from mineral components and characteristics of ash deposition on boiler heating surface during co-firing of coal and biomass","authors":"Yongzheng Wang, Bo Liang, Yanjie Liang, Wenjie Fan, Jisen Liu, Shengli Niu, Kuihua Han","doi":"10.1016/j.joei.2024.101921","DOIUrl":"10.1016/j.joei.2024.101921","url":null,"abstract":"<div><div>The power generation by co-firing of coal and biomass is the most economical and promising technology for existing coal-fired power plants to achieve reducing emission of CO<sub>2</sub> and large-scale efficient utilization of biomass. The mechanism of ash deposition formation from mineral components and the characteristics of ash deposition on boiler heating surface during co-firing of coal and biomass were investigated in this paper. A water-cooled probe was used to simulate the heating surface of high-temperature super-heater in the furnace, and the experiments on ash deposition were carried out in a one-dimensional settling furnace. The micro-morphology, element composition and phase composition of the deposited ash on the surface of the water-cooled probe under different conditions were characterized by means of SEM, EDS, XRD and other methods. The results show that the migration and transformation pathways of alkali metal K and Cl elements in the mineral components can significantly affect the behavior of ash deposition formation. The meltbility of ash particles and the viscosity of deposit sediment are two important factors determining the degree of ash deposition. With the blending ratio of biomass in coal increasing, the content of K<sub>2</sub>O and Cl in the deposited ash increases rapidly, conversely, the content of SiO<sub>2</sub> and Al<sub>2</sub>O<sub>3</sub> in the deposited ash shows rapidly decreasing trend. Meanwhile, based on the micro-morphology features, the particles of the deposited ash gradually become smaller, the structure of the deposited ash becomes denser, and the agglomeration and melting phenomenon in the deposited ash is more obvious. The alkali metal K and Cl in the biomass and S, Si, Al and other components in the coal will have a synergistic effect during co-firing of coal and biomass. There are significant effects of fuel property, the blending ratio of biomass in coal and the temperature in furnace on the characteristics of ash deposition. With the continuous addition of biomass in coal, and the rising temperatures, it will produce KAl<sub>2</sub>(AlSi<sub>3</sub>O<sub>10</sub>)(OH)<sub>2</sub>, K(AlSi<sub>3</sub>O<sub>8</sub>), Ca(A1<sub>2</sub>Si<sub>2</sub>O<sub>8</sub>), Mg<sub>3</sub>Al<sub>2</sub>(SiO<sub>4</sub>)<sub>3</sub> and other substances with low melting point as well as CaSO<sub>4</sub> considered as the binder between ash particles. The overall melting point of the deposited ash is reduced, the viscosity is enhanced, and the degree of the ash deposition is aggravated.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"118 ","pages":"Article 101921"},"PeriodicalIF":5.6,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142759378","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}
Zenghui Hou , Zefeng Ge , Lijuan Sun , Yang Liu , Huiyan Zhang
{"title":"Study on the comprehensive influence of Si-Al-based additives on hydrogen production and K deposition during biomass gasification","authors":"Zenghui Hou , Zefeng Ge , Lijuan Sun , Yang Liu , Huiyan Zhang","doi":"10.1016/j.joei.2024.101915","DOIUrl":"10.1016/j.joei.2024.101915","url":null,"abstract":"<div><div>Green hydrogen production through gasification is a prospective utilization of biomass. Operational issues (slagging, corrosion and catalyst poisoning) due to inherent alkali metal deposition are main factors affecting gasification. The adoption of Si-Al-based additives as alkali metal inhibitors is a promising approach. In this work, the influence of additive types and placement methods on K deposition and gasification characteristics were studied through a decoupled gasification with online analysis. As a result, separative placement (Sep) method could reduce K deposition without decreasing hydrogen yield compared to mechanical mixture (Mix) method. This advantage is particularly prominent in char gasification. SiO<sub>2</sub> is recommended to be added by the Mix to react with alkali and alkaline earth metal species individually to inhibit K release. This match could reduce peak of K deposition content by 55.80 % with less impact on hydrogen yield. Meanwhile, Al<sub>2</sub>O<sub>3</sub> is recommended to be added by the Sep due to its unique comprehensive performance, which could increase hydrogen yield by 4.34 % and reduce peak of K deposition content by 52.72 %. Two recommended addition strategies could be used in different scenarios. This study is expected to guide the design of corrosion-resistant reactors and multifunctional catalysts.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"118 ","pages":"Article 101915"},"PeriodicalIF":5.6,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142756833","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}
Xingyu Lu , Qi Chen , Nan Liu , Jie Chen , Mingming Zhang , Jintao Sun
{"title":"Plasma-catalytic assisted ammonia synthesis: Reactive molecular dynamics study","authors":"Xingyu Lu , Qi Chen , Nan Liu , Jie Chen , Mingming Zhang , Jintao Sun","doi":"10.1016/j.joei.2024.101919","DOIUrl":"10.1016/j.joei.2024.101919","url":null,"abstract":"<div><div>Plasma catalytic assisted ammonia synthesis is currently considered a promising approach that enables ammonia synthesis under low temperature and low pressure. In this paper, ReaxFF molecular dynamics (MD) method was first used to study the impact of varying electric fields and different plasma-generated active species on ammonia synthesis, aiming to uncover the formation mechanisms and synthetic pathways of NH<sub>3</sub> from the molecular-level under plasma assistance. The results indicate that the electric field has the optimal range. With the increase of electric field strength, the collision frequency between N<sub>2</sub> and H<sub>2</sub> molecules does not increase linearly due to the polarization phenomenon, but increases first and then decreases, which affects the production of ammonia. As the electric field is greater than −0.01 V/Å, the ammonia production begins to decline due to the decreased molecular collision frequency as well as the electric-field induced ammonia dissociation. The results also show that the plasma-generated active species significantly promote NH<sub>3</sub> formation. Compared to the plasma-generated excited state and the ion, plasma-generated radicals such as N, H, NH and NH<sub>2</sub> have a more significant promoting effect on ammonia synthesis due to the acceleration of ammonia synthesis elementary reactions and the reduction of starting time significantly. In the aspect of molecular level, a new ammonia synthesis reaction pathway is discovered: N<sub>2</sub>→N<sub>2</sub>H→N<sub>2</sub>H<sub>2</sub>→N<sub>2</sub>H<sub>3</sub>→NH<sub>3</sub>, which was never reported in previous studies. In addition, by decoupling the gas-phase reactions and dissociative adsorption reactions on the catalyst, it verified a new adsorption reaction path: N(s)→NH(s)→N<sub>2</sub>H(s)→N<sub>2</sub>H<sub>2</sub>(s) at molecular level. This study provides valuable insights into the complete dynamic mechanism of plasma catalyst assisted NH<sub>3</sub> synthesis in the molecular level.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"118 ","pages":"Article 101919"},"PeriodicalIF":5.6,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142759379","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}
Jixin Li , Hanlin Zhang , Yiyang He , Xin Wang , Xiao Cao , Haiyan Yang , Lu Chen , Suyun Xu , Haifeng Wen , Lin Gu
{"title":"The synergistic role of sludge conditioner FeCl3/Rice husk on co-combustion with coal gangue: Thermaldynamic behavior, gases pollutants control and bottom ash stabilization","authors":"Jixin Li , Hanlin Zhang , Yiyang He , Xin Wang , Xiao Cao , Haiyan Yang , Lu Chen , Suyun Xu , Haifeng Wen , Lin Gu","doi":"10.1016/j.joei.2024.101920","DOIUrl":"10.1016/j.joei.2024.101920","url":null,"abstract":"<div><div>Coal processing invariably generates substantial quantities of low calorific value waste, specifically coal gangue (CG), which can be advantageously utilized by combusting to yield valuable electrical energy. However, CG incur poor ignition and flame instability, and consequently is not suited to separate combustion. The co-combustion with sewage sludge (SS) has demonstrated positive impacts on energy recovery, whereas the SS dewatering may significantly influence the co-combustion behavior. Therefore, this study systematically investigated the impact of two typical sludge conditioner, namely FeCl<sub>3</sub>·6H<sub>2</sub>O and rice husk (RH), which functions as flocculant and skeletal builder, on their synergistic role on co-combustion with CG. The thermal dynamic combustion behavior, pollutant emissions, slag tendency and bottom ash stability and toxicity were systematically studied. A robust positive synergism is observed, attributed to heat compensation and the formation of alkali metal aluminosilicates from Rh during the ignition phase. Concurrently, the temperature dependent iron oxides evolution enhances the acceleration of O<sub>2</sub> loop, thereby promoting the char combustion. After being jointly conditioned with Rh and FeCl<sub>3</sub>, the co-combustion with CG resulted in CCi being 3.46 times higher than that of C1S3, and the average activation energy in each stage was reduced by 49.1 %. Significantly, the sludge conditioner also contributes to the reduced exhausted gases such as CO<sub>2</sub>, SO<sub>2</sub> and NO. The Rh in SS has been found to mitigate slagging and fouling tendencies, while the retention of Cr, Cu, Ni, and Pb is greatly improved due to the stabilization of silicate minerals in CG. The Artificial Neural Network (ANN) models were established to predict the thermogravimetric experimental data of CG-SS-Rh/Fe, which aims to provide a basis for the selection of optimal operating conditions in real industrial applications.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"118 ","pages":"Article 101920"},"PeriodicalIF":5.6,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142756927","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}
{"title":"Investigation on co-gasification performances of sewage sludge and polyolefins by thermogravimetric analyze and two-stage fixed bed reactor","authors":"Yu Yang, Daiyang Long, Pingping Tang, Yican Jiang, Huiyan Duan","doi":"10.1016/j.joei.2024.101922","DOIUrl":"10.1016/j.joei.2024.101922","url":null,"abstract":"<div><div>Co-gasification of biomass with hydrogen-rich feedstock is a promising method to improve H<sub>2</sub> yield. Thus, in this work, co-gasification performances and corresponding promotion/inhibition effects of sewage sludge (SS) and three types of polyolefins (PE, PP and PS) were investigated in the thermogravimetric analyze and two-stage fixed bed reactor. Thermogravimetric experiments results indicated that with the addition of polyolefins, the initial temperature of blends progressively elevated, while its terminal temperature declined, suggesting that adding polyolefins facilitated the decomposition of samples. The thermal degradation of blends was distinguished into two stages, and in the first stage, a negative interaction was found at 25 % polyolefins mass ratio, but a positive interaction was occurred at 50 % and 75 % polyolefins mass ratios. Meanwhile, in the second stage, a negative interaction was obtained for blending with PE, whereas an opposite result was observed for blending with PP or PS. Therefore, temperature, feedstock and mixing ratio interacted on synergy effects between SS and polyolefins. Besides, two-stage fixed bed experiments results suggested that a higher gasification temperature was beneficial for the production of syngas, particularly the H<sub>2</sub> yield, and blending with polyolefins into SS enhanced the H<sub>2</sub> content, with PE performing best. The synergy interactions between SS and polyolefins accelerated the concentrations of H<sub>2</sub> and CH<sub>4</sub>, while declining the C<sub>n</sub>H<sub>m</sub> yield, demonstrating a stronger re-cleavage of macromolecules. Furthermore, the low heat value of syngas and carbon conversion efficiency for all the samples separately elevated and reduced with rising gasification temperature and polyolefins mass ratios. At 800 °C, the highest gasification efficiency of samples could be achieved with the addition of 50 % PP or PS. This study provides a basis for the application of SS and polyolefins co-gasification.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"118 ","pages":"Article 101922"},"PeriodicalIF":5.6,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142756925","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}
Junheng Liu, Huabin Zhang, Yongxu Wang, Shengyue Xiong, Qian Ji, Chengcheng Ao, Ping Sun
{"title":"Experimental and theoretical investigation of Ce/Ti-doped LaMnO3 catalysts effect on catalytic oxidation rarefied CH4 for natural gas engine","authors":"Junheng Liu, Huabin Zhang, Yongxu Wang, Shengyue Xiong, Qian Ji, Chengcheng Ao, Ping Sun","doi":"10.1016/j.joei.2024.101917","DOIUrl":"10.1016/j.joei.2024.101917","url":null,"abstract":"<div><div>To mitigate the high greenhouse effect caused by methane emissions of natural gas engines, this study employed the citric acid complexation method to synthesize Ce/Ti-doped LaMnO<sub>3</sub> perovskite catalysts. Firstly, the properties of perovskite catalysts were investigated through several characterization techniques and activity evaluations. Secondly, density functional theory (DFT) calculations were performed to study the effects of Ce/Ti doping on perovskite unit cell properties and methane adsorption characteristics. Results indicate that Ce/Ti doping is conducive to enhancing the magnetic properties and attractive forces between particles, thereby improving the crystallinity and specific surface area of catalyst. Additionally, it enhances the oxygen migration rate, promotes the formation of low-temperature reduction active components and reduces the reduction temperature for the catalysts. When Ce/Ti are co-doped, the ratios of the surface-active elements Mn<sup>4+</sup>/Mn<sup>3+</sup> and O<sup>−</sup>/O<sup>2−</sup> on the catalyst reach their maximum values of 1.56 and 1.53, respectively. The co-doping also leads to the formation of alkaline sites such as Mn-O and Ti-O metal pairs, which facilitate the dehydrogenation oxidation of methane. Ce/Ti-co-doped LaMnO<sub>3</sub> perovskite exhibits the optimal low-temperature oxidation activity towards methane, with an ignition temperature reduced to 269 °C and complete methane conversion at 479 °C. Ce/Ti doping enhances the adsorption behavior of methane on catalyst surface, with the adsorption energy of −5.4361eV. Meanwhile, Ce/Ti doping results in a significant transfer of electrons from H<sub>1</sub> atoms of methane to Mn atoms and increases the charge directivity of the surface-active atoms of catalysts, and in turn, it leads to higher catalytic performance and structural stability.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"118 ","pages":"Article 101917"},"PeriodicalIF":5.6,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142756926","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}
Sunwen Xia , Yong Wang , Chen Zhang , Shengli Niu , Bing Li , Dong Wang , Haiping Yang
{"title":"Synergistic effects of iron with alkali and alkaline earth metals on catalytic pyrolysis of biomass for highly graphitized carbon","authors":"Sunwen Xia , Yong Wang , Chen Zhang , Shengli Niu , Bing Li , Dong Wang , Haiping Yang","doi":"10.1016/j.joei.2024.101904","DOIUrl":"10.1016/j.joei.2024.101904","url":null,"abstract":"<div><div>To prepare highly graphitized carbon from biomass and understand the synergistic effects of iron with alkali and alkaline earth metals (AAEMs), K and Ca were introduced to iron-catalyzed graphitization of biomass. Results showed that both K and Ca accelerated the thermal decomposition rate of biomass, and the activation energy of the devolatilization stage with K and Ca reduced to 60.882 kJ/mol and 45.342 kJ/mol respectively, compared to 73.657 kJ/mol without K/Ca. The porous graphitic carbon obtained at 850 °C with the existence of K and Fe exhibited the highest graphitization degree parameter (g = 0.5193) with a big surface area (170.504 m<sup>2</sup>/g). The carbon with Ca and Fe showed a developed mesoporous structure (198.979 m<sup>2</sup>/g) and high graphitization parameter (g = 0.1783), compared to g = 0.0934 without K and Ca. Finally, the tailor-catalyzed mechanism of iron-catalyzed graphitization of biomass in the presence of K/Ca was proposed. K reduced the sp<sup>3</sup> amorphous carbon structures and intercalated carbon framework while Ca produced the in-situ CaO template and extra gasification gas of CO<sub>2</sub>, resulting in an acceleration of the graphitization of biomass.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"118 ","pages":"Article 101904"},"PeriodicalIF":5.6,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142756834","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}
{"title":"Bio-oil production and catalytic upgrade to value added product: A review on recent technologies","authors":"Vinay Kumar , Neha Sharma , Ali Samy Abdelaal , Pritha Chakraborty , Jithin Thomas , Lucky Duhan , Ritu Pasrija , Shivani Dogra , Iyyappan Jayaraj","doi":"10.1016/j.joei.2024.101880","DOIUrl":"10.1016/j.joei.2024.101880","url":null,"abstract":"<div><div>The urgent need of an alternative to fossil fuel has increased the attention towards renewable sources of fuel significantly. Organic matter which are produced through photosynthesis are termed as biomass. Lignocellulosic biomass can be greatly exploited as source of renewable energy, chemicals and materials. Thermochemical conversion like pyrolysis or gasification of lignocellulose biomass produce biogas or bio-oil which needs to be upgraded to transportation fuel. But several undesirable qualities like high viscosity, instability, low energy density, polymerization and corrosion are associated with bio-oil produced from lignocellulosic biomass due to their high oxygen content. Several techniques are available to upgrade the bio-oil which omits the undesirable qualities. The direct relationship between different characteristics of lignocellulosic biomass and quality of bio-oil along with different technologies for bio-oil production are discussed in this review. This review also emphasizes on several upgradation techniques along with the catalysts. The technoeconomic analysis discusses the economic potential of bio-oil and concentrate on the cost-effectivity. Finally, the challenges and future research directions are further analysed in this review.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"118 ","pages":"Article 101880"},"PeriodicalIF":5.6,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142746551","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}