Gas Science and Engineering最新文献

{"title":"Review on spontaneous imbibition mechanisms in gas-water systems: Impacts on unconventional gas production and CO2 geo-sequestration","authors":"Yihang Xiao ,&nbsp;Zhenjiang You ,&nbsp;Zhengtong Du ,&nbsp;Yongming He ,&nbsp;Jun Zheng ,&nbsp;Yujie Yuan ,&nbsp;Lei Wang","doi":"10.1016/j.jgsce.2024.205466","DOIUrl":"10.1016/j.jgsce.2024.205466","url":null,"abstract":"<div><div>Spontaneous imbibition, a fundamental process in porous media, involves the displacement of a non-wetting phase by a wetting phase driven by capillary pressure. It plays a key role in various applications, particularly in unconventional gas production and greenhouse gas geo-sequestration. Despite extensive research in this area, conflicting results and explanations persist regarding imbibition phenomena, particularly in gas-water systems. This paper aims to address this gap by providing a comprehensive review of basic concepts, mechanical analyses, pore-filling patterns, front evolutions, and influencing factors associated with spontaneous imbibition. Mechanical factors including capillary force, viscous force, gravitational force, hydrostatic force, inertial force, capillary back force, and dead end force, play crucial roles in water imbibition with different boundary types. The pore-filling pattern significantly affects microscopic fluid distribution and front evolution during the imbibition process. To resolve conflicting findings, we systematically analyze the influencing factors of spontaneous imbibition within gas-water systems, encompassing rock properties, fluid characteristics, rock-fluid interactions, and reservoir properties. Furthermore, we present an in-depth discussion on the imbibition and trapping mechanisms relevant to unconventional gas production and CO₂ geo-sequestration, providing insights into force analyses and influencing factors. Gas production strategies and favorable conditions for CO₂ capillary trapping are proposed. Finally, we outline existing knowledge gaps and suggest potential directions for future research. This review thus provides useful insights and suggestions for advancing our understanding of spontaneous imbibition within gas-water systems and optimizing unconventional gas production and CO₂ geo-sequestration practices.</div></div>","PeriodicalId":100568,"journal":{"name":"Gas Science and Engineering","volume":"131 ","pages":"Article 205466"},"PeriodicalIF":0.0,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142418754","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":"Multiple holdup equilibria and hydraulic gradients in stratified gas–liquid flows","authors":"Peter S. Johansson ,&nbsp;Zhilin Yang ,&nbsp;Dominique Larrey ,&nbsp;Roel Belt ,&nbsp;Lan Liu","doi":"10.1016/j.jgsce.2024.205461","DOIUrl":"10.1016/j.jgsce.2024.205461","url":null,"abstract":"<div><div>Experimental ramp-up tests for a two-phase flow with very low liquid loading have been conducted for 2°, 3° and 2° + 3° straight pipe configurations. The liquid draining process resulting from the ramp-up operation is explained by multiple holdup equilibria. For the conditions of the experiments, the multiple holdup equilibria region extends down to a gas oil volume flow rate ratio of about 1000. The flow of a pipe segment operating in the multiple holdup equilibria region will obtain the low holdup equilibrium if the holdup at the end of the pipe is sufficiently low. Otherwise, the flow of the pipe segment will obtain the high holdup equilibrium. Liquid accumulation can be minimized by avoiding steep inclination angles at the culmination of uphill sections in low liquid loading gas condensate systems. Ensuring low holdup equilibria throughout the pipeline, where multiple equilibria exist, minimizes liquid accumulation and reduces minimum flow rate limits during operating conditions.</div></div>","PeriodicalId":100568,"journal":{"name":"Gas Science and Engineering","volume":"131 ","pages":"Article 205461"},"PeriodicalIF":0.0,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142418694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A cradle-to-gate life cycle assessment for clean hydrogen gas production pathway using the CeO2/Ce2O3-based redox thermochemical cycle","authors":"Muhammad Ishaq,&nbsp;Ibrahim Dincer","doi":"10.1016/j.jgsce.2024.205464","DOIUrl":"10.1016/j.jgsce.2024.205464","url":null,"abstract":"<div><div>The present study is conducted to develop a two-steps redox thermochemical cycle based on combined ceria reduction and methane reforming through the CeO₂/Ce₂O₃ redox pair. This cycle incorporates simultaneous water splitting for hydrogen production. To enhance the accuracy and reliability of the inventory data, the system is simulated using the Aspen Plus software package. Also, the goal of this work is to evaluate the carbon footprint of thermochemical based hydrogen production under different scenarios and to compare it with traditional technologies like steam methane reforming (SMR). The analysis takes into account both the plant manufacturing line (reactors), fuel processing (H₂ production), redox particles oxygen carrier manufacturing (OC), H₂ compression (power consumption) and H₂ storage (pipeline manufacturing). The openLCA software with the European database environmental footprint is employed to compute the total carbon emissions of this thermochemical cycle during its overall life cycle. The study concludes that the base case scenario of this system has an overall GWP of 1751.14 g CO₂ eq./kg H₂ respectively. In the overall GWP, the share of plant construction and OC production was found to be around 1.67%, and 15.78% respectively. The conventional steam methane reforming is loaded with an overall GWP of 4472.83 g CO₂ eq./kg H₂. In terms of renewable energy input, the base case scenario of this hydrogen production system results in 1465.73 g CO₂ eq./kg H₂ with thermal energy produced from renewable sources. Comparative life cycle assessment (LCA) demonstrates that base case of CeO₂/Ce₂O₃ has an 85.41% lower GWP emphasizing its environmental advantages over the SMR and Fe₃O₄/FeO redox pair carries an 84.06% lower GWP as compared to the conventional SMR with 1483.55 g CO₂ eq./kg H₂. The present study concludes that the combined ceria reduction and methane reforming chemical looping process with simultaneous water splitting may be a more promising option to produce hydrogen using renewable energy.</div></div>","PeriodicalId":100568,"journal":{"name":"Gas Science and Engineering","volume":"131 ","pages":"Article 205464"},"PeriodicalIF":0.0,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142418695","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":"Hydrate-based gas separation (HBGS) technology review: Status, challenges and way forward","authors":"Syam Kuzhikkadan Viswanadhan ,&nbsp;Amit Singh ,&nbsp;Hari Prakash Veluswamy","doi":"10.1016/j.jgsce.2024.205465","DOIUrl":"10.1016/j.jgsce.2024.205465","url":null,"abstract":"<div><div>Gas hydrates are crystalline, non-stoichiometric compounds that have several pertinent applications. This review attempts to present the current status of hydrate based gas separation (HBGS), discusses about existing challenges and puts forth future directions of research. Several pertinent gas mixtures including fuel gas (CO₂/H₂), flue gas (CO₂/N₂), biogas (CH₄/CO₂) and other industrially relevant mixtures are considered with gas hydrate based studies for each of these mixtures are presented. Advantages of using HBGS for gas mixture separation over other existing gas separation techniques has been elaborated in this work. In addition, the different kinetic and thermodynamic promoters studied for HBGS, their effectiveness in enhancing the gas separation, various reactor designs employed, patents on hydrate based gas separation, cost economics and energy requirement for HBGS are accounted.</div></div>","PeriodicalId":100568,"journal":{"name":"Gas Science and Engineering","volume":"131 ","pages":"Article 205465"},"PeriodicalIF":0.0,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142432296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A novel framework for the economic and sustainability assessment of carbon capture and utilization technologies","authors":"Gasim Ibrahim ,&nbsp;Mohamed S. Challiwala ,&nbsp;Guiyan Zang ,&nbsp;Mahmoud M. El-Halwagi ,&nbsp;Nimir O. Elbashir","doi":"10.1016/j.jgsce.2024.205462","DOIUrl":"10.1016/j.jgsce.2024.205462","url":null,"abstract":"<div><div>This study presents a novel framework for assessing early-stage carbon capture and utilization (CCU) reactions. The introduced greenhouse gas abatement, sustainability, and economics framework (GASEF) assesses commercial viability by simultaneously analyzing a CCU technology's CO₂ fixation potential with its economic potential. The developed framework combines a previously published CO2Fix parameter and the metric for inspecting reactants and sales (MISR) to estimate CO₂ fixation and economic potentials. Both metrics can be estimated using limited information such as temperature, pressure, conversion, molecular weights, the heat of reaction, and the prices of the reactants and products of the CCU reaction. Results from this novel framework are demonstrated via case studies of notable CCU technologies, such as Dry Reforming of Methane and CO₂ hydrogenation to methanol processes. Furthermore, the possible implications of providing CO₂ subsidies for CCU processes for the gross CO₂ input into these processes versus providing CO₂ subsidies for the net CO₂ fixation of the process is evaluated. In particular, the GASEF assessment on the DRM process showcased a potential for commercial viability even when the technology implementation requires additional investment of 0.1 $/kgCO₂ (pertaining to low-concentration CO₂ streams) due to carbon capture and sequestration efforts to achieve net-zero emissions. In the case of CO₂ hydrogenation to methanol process, the GASEF assessment showcased the potential for commercial viability only at low CO₂ credit (0.05 $/kgCO₂); however, at values higher than this, the process becomes tenuous. These case studies provide a comprehensive demonstration of the use of the GASEF as a versatile tool to support rapid economics and sustainability evaluation of the new CCU technologies.</div></div>","PeriodicalId":100568,"journal":{"name":"Gas Science and Engineering","volume":"131 ","pages":"Article 205462"},"PeriodicalIF":0.0,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142359068","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":"Effect of promoters in hydrates based carbon dioxide capture: A review","authors":"Aseem Dubey,&nbsp;Akhilesh Arora","doi":"10.1016/j.jgsce.2024.205459","DOIUrl":"10.1016/j.jgsce.2024.205459","url":null,"abstract":"<div><div>Climate change necessitates a paradigm shift toward using clean energy technologies and carbon dioxide (CO₂) capture from emitting sources to alleviate the greenhouse effect and meet sustainable development objectives. Among the competing carbon capture technologies, high CO₂ storage capacity, use of water, and low capturing cost are critical advantages for applying gas hydrate based CO₂ capture. However, high equilibrium pressure and slow kinetics are issues in gas hydrate formation. The review contributes an exhaustive analysis of hydrate based technology and the additives used to stimulate hydrate formation, focusing on thermodynamic and kinetic promoters. Furthermore, the recent emerging research progress of hydrate-based CO₂ capture encompassing nanoparticles, porous materials, synergists, and hybrid hydrate-membrane methods is also presented. Heat integration in the process of novel hydrate-membrane with promoters has drawn attention appreciably to tackle energy, cost, and ecological concerns, including improvement in technology readiness level. Furthermore, innovative approaches, challenges, and aligned research and development opportunities are presented, which will assist the researchers in exploring advanced promoters and hybrid integrated technologies to compete with existing CO₂ capture technologies.</div></div>","PeriodicalId":100568,"journal":{"name":"Gas Science and Engineering","volume":"131 ","pages":"Article 205459"},"PeriodicalIF":0.0,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142315764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Molecular insights into the formation of carbon dioxide hydrates on the external surface of sodium montmorillonite in the presence of various types of organic matters","authors":"Yun Li ,&nbsp;Meng Han ,&nbsp;Zhouhua Wang ,&nbsp;Bao Yuan ,&nbsp;Kaixiang Shen ,&nbsp;Baifa Zhang ,&nbsp;Pengfei Wang ,&nbsp;Songbai Han ,&nbsp;Jinlong Zhu","doi":"10.1016/j.jgsce.2024.205457","DOIUrl":"10.1016/j.jgsce.2024.205457","url":null,"abstract":"<div><div>To address the urgent challenge of global climate change due to the greenhouse effect resulting from increasing carbon dioxide (CO₂) emissions, viable technologies for geological CO₂ storage must be developed. Of such technologies, CO₂ hydrates holds significant promise for CO₂ storage in seabed sediments, which typically contain clay minerals and organic matter (OM). Thus, investigating the structure of clay mineral interfaces and their interactions with OM is crucial for understanding the nucleation and growth of CO₂ hydrate in seabed sediments. In this study, molecular dynamics simulations were used to investigate CO₂ hydrate formation on the external surface of sodium montmorillonite (Na-Mnt) in the presence of various types of OM. The results show that the Na-Mnt surface adsorbed certain numbers of sodium ions (Na⁺) and OM molecules. The hydration of Na ⁺ disrupted of the hydrogen bond structure of CO₂ hydrates, while hydrogen bonds that formed between OM and H₂O molecules hindered CO₂ hydrate formation. Consequently, CO₂ hydrates predominantly formed in the bulk-like solution away from the Na-Mnt. However, the electrostatic interaction between the carboxyl groups of OM and Na⁺ mitigated the inhibitory effect of Na⁺ on CO₂ hydrate formation. Over all, these findings can serve as a fundamental theoretical basis for understanding the formation and occurrence characteristics of CO₂ hydrates in seabed sediments with a rich Mnt content. Such understanding will help to advance the development of CO₂ storage technologies utilizing CO₂ hydrates in seabed sediments.</div></div>","PeriodicalId":100568,"journal":{"name":"Gas Science and Engineering","volume":"131 ","pages":"Article 205457"},"PeriodicalIF":0.0,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142312559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mineralogy and reactive fluid chemistry evolution of hydraulically fractured Caney shale of Southern Oklahoma","authors":"Gabriel A. Awejori ,&nbsp;Wenming Dong ,&nbsp;Christine Doughty ,&nbsp;Nicolas Spycher ,&nbsp;Mileva Radonjic","doi":"10.1016/j.jgsce.2024.205458","DOIUrl":"10.1016/j.jgsce.2024.205458","url":null,"abstract":"<div><div>This study investigates geochemical rock-fluid interactions as a potential cause of rapid loss of permeability and productivity in hydraulically fractured shale reservoirs. It also interrogates the effects of these reactions in transforming depleted shale reservoirs into impermeable carbon storage units. The study employs batch reactor experiments where rock-powder samples are reacted with field fracturing fluid under reservoir temperature (95^oC).</div><div>Results show significant changes in mineralogy and fluid chemistry following rock-fluid reactions up to 30 days. Initial mineralogy of the rock samples includes quartz, feldspar, carbonate, pyrite, and clay minerals. Post-reaction rock mineralogy reveals the breakdown of pyrite, carbonates and feldspars, and an increase of illite content. Results from reacted fluid analyses corroborate the mineralogical changes observed after different reaction periods. Mineralogical changes in rock powders and changes in fluids chemistry at different sampling intervals (0, 7 and 30-days) reveal complex trends of dissolution and precipitation of various components. In general, the reactions proceed as follows: Dissolved oxygen and oxidants in fracturing fluids cause the breakdown and oxidation of pyrite which introduces transient and localized acidity into fluids. The transient acidity catalyzes the breakdown of feldspars and carbonates leading to the release of primarily Na, Al, Si, Fe, and inorganic C into solution. These dissolved elements subsequently react to precipitate secondary minerals which may be detrimental to reservoir permeability in the long-term. Results from experimental modelling confirmed the above-mentioned dissolution, precipitation reactions.</div><div>Findings from this research serve an essential basis to help in finetuning fracturing fluid compositions to mitigate adverse reactions that cause rapid decline in permeability and productivity in hydraulically fractured shale reservoirs. The findings also have applications in geological carbon storage in depleted shale reservoirs in context of mineralogical alterations capable of transforming these reservoirs into impermeable carbon storage units and seals.</div></div>","PeriodicalId":100568,"journal":{"name":"Gas Science and Engineering","volume":"131 ","pages":"Article 205458"},"PeriodicalIF":0.0,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142327223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Flow corrosion simulation study of local defects in CO2 saturated solution","authors":"Qichao Fang ,&nbsp;Yanlin Zhao ,&nbsp;Jiangtao Wei ,&nbsp;Zhijie Wang ,&nbsp;Jun Yao ,&nbsp;Sheng Chen ,&nbsp;Meng He","doi":"10.1016/j.jgsce.2024.205460","DOIUrl":"10.1016/j.jgsce.2024.205460","url":null,"abstract":"<div><div>The inner walls of oil and gas transportation pipelines are prone to the formation of localized pitting defects due to the presence of solid particles in multiphase flow. The continuous flow poses a risk of perforation leakage in the pipe wall. To investigate the development of defects under flow corrosion and assess the impact of flow, a multi-field coupling finite element model incorporating fluid dynamics, reactions, and mass transfer was developed. The flow corrosion of local defects with various depths in a CO₂-saturated solution was simulated. The calculation of mass transfer in corrosion is coupled with the precise flow field solved by large eddy simulation (LES) method. It has been observed that the distribution of corrosive substances is significantly affected by the flow due to local defects. Within these defects, the maximum concentration of corrosion product Fe²⁺ is observed on the upstream surface of defects. While the H⁺ accumulates at the downstream wall, which affects the corrosion rate. The local turbulent state is influenced by the depth of defects, and the interplay of the turbulence intensity with reflux velocity determines the mass transfer.</div></div>","PeriodicalId":100568,"journal":{"name":"Gas Science and Engineering","volume":"131 ","pages":"Article 205460"},"PeriodicalIF":0.0,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142315765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamic gas emission during coal seam drilling under the thermo-hydro-mechanical coupling effect: A theoretical model and numerical simulations","authors":"Xiuquan Yuan ,&nbsp;Wenxin Dong ,&nbsp;Jinyang Fan ,&nbsp;Peng Liu ,&nbsp;Zongze Li ,&nbsp;Marion Fourmeau ,&nbsp;Jie Chen ,&nbsp;Wei Liu","doi":"10.1016/j.jgsce.2024.205454","DOIUrl":"10.1016/j.jgsce.2024.205454","url":null,"abstract":"<div><p>The potential risk of coal and gas outbursts has increased with the depth of coal mining, posing the threat of heavy casualties, vast economic losses, and harm to the ecological environment. Considering the limitations of existing coal and gas outburst prediction methods, novel indicators or methods are needed. In this study, a fully coupled dynamic drilling gas emission THM model of gas diffusion, seepage, and flow is established, and the reliability of the model was verified by the measured data. The validated model was applied to single-factor and multi-factor impact analysis of dynamic drilling gas emission. The simulation results showed that (1) During the drilling process, the increase in permeability is mainly attributed to the coal seam damage and disturbance caused by the borehole and the coupling effects of the THM model, which increase the porosity around the borehole. Driven by the pressure gradient and temperature gradient, the gas pressure and temperature of the coal seam around the borehole show a conical distribution. (2) In the single-factor analysis, increasing the values of coal seam parameters (initial gas pressure, initial permeability, and initial coal temperature) and drilling parameters (borehole radius) will promote gas emissions in the drilling process to different degrees. The most significant promoting effect is the initial permeability, and the weakest is the initial coal temperature. (3) The response surface analysis results of the four factors show that the interaction between initial coal temperature C and borehole radius D is the least significant, and the interaction between initial gas pressure A and initial permeability B is the most significant. Meanwhile, the established multiple regression model characterizes the relationship between borehole gas emissions and initial coal seam gas pressure, and the idea of using drilling gas emission volume to predict coal and gas outbursts was proposed.</p></div>","PeriodicalId":100568,"journal":{"name":"Gas Science and Engineering","volume":"131 ","pages":"Article 205454"},"PeriodicalIF":0.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142274723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}