Unconventional Resources最新文献

{"title":"Thank you reviewers!","authors":"","doi":"10.1016/j.uncres.2025.100172","DOIUrl":"10.1016/j.uncres.2025.100172","url":null,"abstract":"","PeriodicalId":101263,"journal":{"name":"Unconventional Resources","volume":"6 ","pages":"Article 100172"},"PeriodicalIF":0.0,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Harnessing unconventional resources for large-scale green hydrogen production: An economic and technological analysis in Indonesia","authors":"Singgih Dwi Prasetyo ,&nbsp;Yuki Trisnoaji ,&nbsp;Zainal Arifin ,&nbsp;Abram Anggit Mahadi","doi":"10.1016/j.uncres.2025.100174","DOIUrl":"10.1016/j.uncres.2025.100174","url":null,"abstract":"<div><div>This study evaluates the potential for large-scale green hydrogen production in Indonesia by utilizing renewable energy sources connected on-grid, namely 50 MWp of solar panels and 35 MW of wind turbines, as well as a hybrid system combining both with a capacity of 45 MW at a grid cost of $100/kWh, in five strategic cities: Banyuwangi, Kupang, Bau-Bau, Banjarmasin, and Ambon. Using HOMER Pro software, various integrated energy system scenarios involving ion exchange membrane electrolysis and alkaline water electrolysis. Additionally, the study assumes a project lifespan of 15 years, a discount rate of 6.6 %, and an inflation rate of 2.54 %. The results showed that Bau-Bau recorded the highest hydrogen production, reaching more than 1.9 million kilograms per year, with the lowest levelized cost of hydrogen of $0.65/kg in Scheme 2. On the other hand, Kupang shows high costs for most schemes, with the levelized cost reaching $1.10/kg. In addition to hydrogen, the study also evaluated oxygen production as a by-product of electrolysis. Bau-Bau and Kupang recorded the highest oxygen production, with Scheme 6 achieving more than 15 million kilograms per year. The cost of electricity production varies between cities, with Banyuwangi having the lowest cost of electricity for wind energy at $80.9/MWh. The net present cost for renewable energy systems in Banyuwangi was $35.4 million for wind turbines, while the photovoltaic + wind combination showed the highest cost at $116 million. These findings emphasize the importance of hybrid systems in improving hydrogen production efficiency and supporting sustainable energy transition in Indonesia.</div></div>","PeriodicalId":101263,"journal":{"name":"Unconventional Resources","volume":"6 ","pages":"Article 100174"},"PeriodicalIF":0.0,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correlation between micellization and esterification processes in non-aqueous surfactant-containing compositions potentially applicable for organic-rich rocks treatments","authors":"Mikhail Aleksandrovich Silin,&nbsp;Lyubov Abdulaevna Magadova,&nbsp;Zaur Rastyamovich Davletov,&nbsp;Yuliya Zhanovna Vagapova","doi":"10.1016/j.uncres.2025.100171","DOIUrl":"10.1016/j.uncres.2025.100171","url":null,"abstract":"<div><div>This article is concerned with study of surfactants' influence on the properties of developed hydrocarbon-based intensifying compositions, potentially applicable in complex reservoirs with a high content of rock-forming organic matter, including Bazhenov Formation (Western Siberia, Russia). These compositions consist of acetic acid, isopropanol, isopropyl acetate (product of the esterification reaction between acid and alcohol directly in the composition volume), and an aromatic solvent – composition base. Also, surfactants are important components of chemical compositions for rock treatments (for example, for acid treatments). Their presence promotes increasing of the detergency effect on hydrocarbon components and slows down the intense interaction of the acidic component of compositions with minerals. It is known that surfactants in solutions are inclined to micellization, furthermore, a hydrocarbon medium promotes the formation of reverse micelles. The most important function of such structures is their ability to have a reversible process of solubilization of polar components from solution into the core, making them inactive. It has a huge impact on the resultant content of compositions’ components and, as a result, on the final properties of these systems. Behavior of formed reverse micelles of different types of surfactants in compositions was studied by determining their interstructural and local transformations using the viscosimetry method under conditions of millimeter-scale pores. It has been shown that the features of local transformations of micelles influence the esterification reaction between acid and alcohol. It has been established that the amount of formed ester and functions of intensifying systems vary depending on the type and concentration of surfactant. The results obtained will help to realize a more accurate choice of composition formulations depending on the mineral composition of rocks and the content of various hydrocarbon compounds in rock-forming organic matter.</div></div>","PeriodicalId":101263,"journal":{"name":"Unconventional Resources","volume":"6 ","pages":"Article 100171"},"PeriodicalIF":0.0,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143706441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sustainable strategies for preventive maintenance and replacement in photovoltaic power systems: Enhancing reliability, efficiency, and system economy","authors":"Bashar Mahmood Ali ,&nbsp;Tariq J‏. Al‏-‏Musawi ,&nbsp;Aymen Mohammed ,&nbsp;Hassan Falah Fakhruldeen ,&nbsp;Talib Munshid Hanoon ,&nbsp;Azizbek Khurramov ,&nbsp;Doaa H. Khalaf ,&nbsp;Sameer Algburi","doi":"10.1016/j.uncres.2025.100170","DOIUrl":"10.1016/j.uncres.2025.100170","url":null,"abstract":"<div><div>This study proposes a preventive maintenance and replacement strategy for photovoltaic (PV) power generation systems, addressing reliability as a key constraint. The research introduces a novel approach incorporating service age regression and failure rate increment factors to model PV equipment degradation. A flexible, non-periodic, and incomplete maintenance model is developed, optimizing maintenance cycles, pre-repair counts, and replacement schedules to balance maintenance costs and equipment availability. The model effectively mitigates the risks of over- or under-maintenance. Comparative analysis demonstrates that the proposed strategy, with an optimal maintenance setting of 0.913, reduces average maintenance costs by 21.4 % and 6.22 % while increasing equipment availability by 0.2411 % and 0.03222 %, compared to an equal-cycle maintenance model without reliability constraints and a model that disregards equipment replacement thresholds. These findings highlight the model's effectiveness in ensuring high operational reliability and economic efficiency of PV plants. The study contributes a novel optimization framework that enhances PV system sustainability by integrating reliability-driven maintenance and replacement decisions. However, it does not consider component correlations within PV systems.</div></div>","PeriodicalId":101263,"journal":{"name":"Unconventional Resources","volume":"6 ","pages":"Article 100170"},"PeriodicalIF":0.0,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrigendum to “Integrating solar and wind energy into electricity grid for improved power accessibility” [Unconvention. Resour. 5 (2025) 100129]","authors":"Collins N. Nwagu ,&nbsp;Chika Oliver Ujah ,&nbsp;Daramy V.V. Kallon ,&nbsp;Victor S. Aigbodion","doi":"10.1016/j.uncres.2025.100164","DOIUrl":"10.1016/j.uncres.2025.100164","url":null,"abstract":"","PeriodicalId":101263,"journal":{"name":"Unconventional Resources","volume":"6 ","pages":"Article 100164"},"PeriodicalIF":0.0,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143619440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Governmental effectiveness in the transition to a circular economy: Dynamic DEA model","authors":"Svetlana V. Ratner ,&nbsp;Andrey V. Lychev ,&nbsp;Vladimir E. Krivonozhko ,&nbsp;Svetlana A. Balashova","doi":"10.1016/j.uncres.2025.100161","DOIUrl":"10.1016/j.uncres.2025.100161","url":null,"abstract":"<div><div>This study applies Data Envelopment Analysis (DEA) model to the problem of assessing the results of government support of transition to a circular economy development in 27 EU countries in 2014–2021. The performance of governments is evaluated in terms of creating conditions for the development of cost-effective business models and technologies that can operate without permanent incentives and benefits from the state. This approach differs from the models popular in the current literature, which assess the efficiency of the circular economy primarily in terms of improved environmental performance. Calculations show that the most efficient models of circular economy are created by Austria, France, Germany, Italy, Luxembourg, Malta, and Sweden.</div></div>","PeriodicalId":101263,"journal":{"name":"Unconventional Resources","volume":"6 ","pages":"Article 100161"},"PeriodicalIF":0.0,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143696982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Service charge-based benefit function in the multi microgrids by creating optimal coalition and employing demand response programs","authors":"Ramin Pouyan,&nbsp;Mohammad Tolou Askari,&nbsp;Meysam Amirahmadi,&nbsp;Vahid Ghods","doi":"10.1016/j.uncres.2025.100169","DOIUrl":"10.1016/j.uncres.2025.100169","url":null,"abstract":"<div><div>By appearing and introducing restructured power system concept, traditional vertical power system is converted to the locally generation units or the collection of generation units, storage units and loads as microgrid (MG). To better power supplying and eliminating the requisition to the installing new power plant, utilizing multi-MG is the best choice. This aim needs to use the electrical infrastructure of distribution network (DN). To make it feasible and economical, MG operators should pay costs to utilizing DN operator's (DNO)electrical infrastructure. This cost is introduced as service charge. In this work, the main function is defined as total benefits of MGs. In the benefit function, service charge costs are considered. To increase the total benefits of MGs and supply loads energy demands, creating coalition among MGs is considered. Furthermore, to increase the total benefits of MGs and DNO demand response programs (DR) are employed. Shapely value method is used to solve benefit function. In case without coalition among MGs, and with employing DR programs, in the residential-based DR programs, MGs total benefits increase 12 %, complex building base load MGs total benefits increase 24 % and industrial-based MG's benefits increase 18 %. In the case with creating coalition, these values are changed to 27 %, 38 % and 23 %, respectively.</div></div>","PeriodicalId":101263,"journal":{"name":"Unconventional Resources","volume":"6 ","pages":"Article 100169"},"PeriodicalIF":0.0,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sorption capacity evaluation of industrial flue gas mixture using South African coal seams: Conventional and ANN modelling","authors":"Kasturie Premlall,&nbsp;Lawrence Koech,&nbsp;Douw Faurie","doi":"10.1016/j.uncres.2025.100168","DOIUrl":"10.1016/j.uncres.2025.100168","url":null,"abstract":"<div><div>This study investigates the sorption efficiency of synthetic flue gas compared to pure CO₂ in two South African coal seams. The samples, designated AN and TD, represent distinct coal ranks, with AN being a high-rank coal (2.91 % vitrinite reflectance) and TD a medium-rank coal (1.26 % vitrinite reflectance). The experiments involved a high-pressure volumetric adsorption method to evaluate the adsorption capacities of pure CO₂ and a synthetic flue gas mixture (21 % CO₂, 4 % O₂, 0.03 %SO₂ and 74.97 % N₂) at temperatures of 35 °C and 65 °C, and pressures up to 87 bar. The results indicate a significant effect of temperature on CO₂ adsorption in flue gas, with a substantial drop of 49 % and 37 % observed for AN and TD coals samples, respectively, at 65 °C compared to 35 °C. Both coal samples exhibit a high adsorption preference for CO₂ in flue gas, with AN showing greater affinity across all operating conditions. The presence of flue gas components significantly impacted CO₂ adsorption, causing reductions of 94 % for AN and 91 % for TD at 35 °C. AN coal (high rank) showed superior adsorption capacity for all flue gas components, attributed to its favourable properties including high inertinite content, low moisture content and low ash content offering minimal adsorption hindrance. This study evaluated multi-component adsorption using the Extended Langmuir and Modified Competitive Langmuir isotherm models. Both models effectively captured the experimental data, demonstrating preferential CO₂ adsorption as reflected by higher maximum adsorption capacity across all scenarios. Additionally, artificial neural network modelling of the adsorption data demonstrated a strong fit with the experimental data, yielding low MSE values and R² values above 0.99 for training, validation and testing. This study aims to evaluate CO₂ selectivity in a multi-component flue gas adsorption system in South African coals and explore the feasibility of direct flue gas injection into coal seams.</div></div>","PeriodicalId":101263,"journal":{"name":"Unconventional Resources","volume":"6 ","pages":"Article 100168"},"PeriodicalIF":0.0,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Discussion on influencing factors of hydrocarbon generation in deep source rocks: A case study of Bozhong Sag, Bohai Bay basin","authors":"Liwen Zhu ,&nbsp;Zhenliang Wang ,&nbsp;Feilong Wang ,&nbsp;Yuanyuan Tian","doi":"10.1016/j.uncres.2025.100166","DOIUrl":"10.1016/j.uncres.2025.100166","url":null,"abstract":"<div><div>Deep layer, deep water, and unconventional areas are the inevitable trend of oil and gas exploration and development in the world. Hydrocarbon generation and accumulation are significant and challenging topics in deep oil and gas exploration, particularly in the context of the geological setting characterized by high temperature and pressure in deep layers. This study introduces an innovative approach by utilizing the findings from hydrogenation thermal simulation experiments to constrain the hydrocarbon generation kinetics parameters within the basin simulation process. By integrating these results with geochemical characteristics, key factors such as paleo-lake salinity, high temperature, excess pressure, and deep hydrogen-rich fluids were analyzed, revealing the unique characteristics of hydrocarbon generation evolution in the deep Paleogene source rocks of Bozhong Sag. It is found that salinization of lacustrine basin is beneficial to the enrichment of organic matter and the formation of high-quality source rocks. The high temperature is favorable to the thermal evolution of source rocks and hydrocarbon generation of organic matter, and it also leads to the cracking of hydrocarbons and affects the phase state of hydrocarbons. Excess pressure is conducive to the expulsion and migration of hydrocarbons and is the driving force of hydrocarbon migration and accumulation. Hydrogenation effect of deep hydrogen-rich fluids, especially near deep-seated faults, significantly improves the hydrocarbon generation potential of source rocks. The hydrogenation thermal simulation experiment has strongly confirmed this viewpoint, and with sufficient external hydrogen, the total hydrocarbon production can be increased by 2.5–3.2 times.</div></div>","PeriodicalId":101263,"journal":{"name":"Unconventional Resources","volume":"6 ","pages":"Article 100166"},"PeriodicalIF":0.0,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143642798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Adopting internet project management to achieve sustainable development goals in the context of energy transition","authors":"Svetlana Revinova,&nbsp;Inna Lazanyuk","doi":"10.1016/j.uncres.2025.100158","DOIUrl":"10.1016/j.uncres.2025.100158","url":null,"abstract":"<div><div>The article analyzes the combination of the main components of sustainable development goals that affect energy transition with the principles of Internet project management. The main gaps in methodological approaches to achieving sustainable development goals and project management are identified. The business processes of the largest Internet projects of international companies Alibaba, Amazon, Yandex, aimed at achieving sustainable development goals are analyzed. Recommendations for Internet projects have been developed, which are systematized into 2 groups of business processes: related to online and offline components of the activity. The developed recommendations are aimed at the need for a deeper specification of the priorities and goals of the project. During the assessment of the developed recommendations, it was revealed that the proposals for managing an Internet project in the context of achieving sustainable development goals and energy transition are mainly aimed at ensuring the correct and effective operation of the main element of the electronic project – the platform (website, application). The recommendations developed are of a general nature for all project management and may differ and be modified depending on the scale of the project, the scope of activity, legislation, the presence of certain problems or prospects of the region of presence. However, the application of a number of such actions and measures will improve the sustainability of the project itself, reduce its impact on the environment, improve its reputation and increase competitiveness.</div></div>","PeriodicalId":101263,"journal":{"name":"Unconventional Resources","volume":"6 ","pages":"Article 100158"},"PeriodicalIF":0.0,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143563350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}