Maryam Nazari, Edward Cieplechowicz, Gregory C. Welch
{"title":"Air processed, high open-circuit voltage indoor organic photovoltaic cells based on side chain modified N-annulated perylene diimides","authors":"Maryam Nazari, Edward Cieplechowicz, Gregory C. Welch","doi":"10.1002/cjce.25402","DOIUrl":"10.1002/cjce.25402","url":null,"abstract":"<p>To achieve high-performance indoor organic photovoltaics (OPVs), it is important to match the photoactive layer optical absorption with the light-source emission. This can be accomplished by developing organic photoactive materials that can efficiently absorb visible light and thus minimize energy losses. While indoor OPVs have achieved efficiencies above 33% under low light intensities, the power output is limited by low open circuit voltages (<i>V</i><sub>OC</sub>), often well below 1 V. In this study, we present a series of visible-light absorbing (energy gap >1.90 eV) non-fullerene acceptors (NFAs) based on perylene diimide dimers, which have been systematically modified with side chains of varying polarity and steric bulk (trimethyl benzyl, ethyl adamantane, trialkoxyl phenyl, and oligo ethylene glycol). Our results show that the incorporation of sterically bulky side chains such as ethyl adamantane and trimethyl benzyl, blended with the common widegap polymer PTQ10, provides photoactive layers with absorption greater than 2.0 eV, and consequently, <i>V</i><sub>OC</sub>s higher than 1.2 V are achieved under AM 1.5 G illumination. Importantly, we found that the NFA with ethyl adamantane based side chains (tPDI<sub>2</sub>N-ethyl adamantane, compound 4) exhibited the best performance, with minimized energy loss. As a result, devices using PTQ10:tPDI<sub>2</sub>N-ethyl adamantane photoactive layers demonstrated excellent indoor efficiencies of over 16% and 18 μW cm<sup>−2</sup> power output under a 2700 K LED lamp at 300 lux, and showed better repeatability compared to other systems. The PTQ10:tPDI<sub>2</sub>N-ethyl adamantane based devices maintained a high <i>V</i><sub>OC</sub> (>1.0 V) across a wide range of indoor lighting conditions, including 2700 K and 6500 K LED lamps. Overall, this work provides a sidechain engineering method to create NFAs for efficient indoor OPV devices.</p>","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"102 12","pages":"4120-4128"},"PeriodicalIF":1.6,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cjce.25402","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141647729","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Marco Bellegoni, Giulia Marroni, Alessandro Mariotti, Maria Vittoria Salvetti, Gabriele Landucci, Chiara Galletti
{"title":"Application of uncertainty quantification techniques in the framework of process safety studies: Advanced dispersion simulations","authors":"Marco Bellegoni, Giulia Marroni, Alessandro Mariotti, Maria Vittoria Salvetti, Gabriele Landucci, Chiara Galletti","doi":"10.1002/cjce.25410","DOIUrl":"10.1002/cjce.25410","url":null,"abstract":"<p>In the framework of process safety studies, consequence assessment of accidental scenarios is a crucial step affecting the eventual risk profile associated with the facilities under analysis. Conventional models used for consequence assessment are based on integral models, and may not be adequate to cope with the dynamic evolution of accidental scenarios and their three-dimensional features. On the other hand, consequence assessment models based on computational fluid dynamics (CFD) approaches are promising to cope with complex scenarios and environments, but setting the simulation introduces relevant uncertainties associated with both the input data, assumptions, and with the modelling of physical effects involved. In the present study, uncertainty quantification (UQ) techniques are applied to support advanced safety studies based on CFD simulations of hazardous gas dispersion. Firstly, the accidental scenarios are characterized by defining release scenarios and conditions and quantifying source terms using integral models. At the same time, input meteorological data are gathered. This enables the development of high-fidelity CFD simulations of gas dispersion based on different input sets and eventually the implementation of UQ techniques. The generalized polynomial chaos (gPC) expansion is employed to obtain hazardous gas concentration based on the variation of wind direction and speed. The present method is applied for the analysis of a real plant featuring a complex layout. The results show the advantages of the present approach by quantifying the influence of meteorological conditions and providing indications for supporting the development of protection systems and emergency measures.</p>","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"102 12","pages":"4072-4084"},"PeriodicalIF":1.6,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141648266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Danwyn J. Aranha, Madhuri M. Kininge, Parag R. Gogate
{"title":"Intensification of fructose dehydration into 5-HMF and subsequent oxidation to 2,5-FDCA using ultrasound","authors":"Danwyn J. Aranha, Madhuri M. Kininge, Parag R. Gogate","doi":"10.1002/cjce.25409","DOIUrl":"10.1002/cjce.25409","url":null,"abstract":"<p>Ultrasound-assisted dehydration of fructose into 5-hydroxymethylfurfural (5-HMF) and subsequent oxidation to furandicarboxylic acid (2, 5-FDCA) is studied in the current work with the main objective being to elucidate the effectiveness of ultrasound for intensified synthesis. The effect of reaction parameters like ultrasound power, duty cycle, reaction time, reaction temperature, solid to solvent ratio, and fructose concentration on the dehydration of fructose into 5-HMF has been studied. Optimized conditions established were ultrasonic power of 140 W, duty cycle of 60%, reaction time of 60 min, temperature of 100°C, and fructose:dimethylsulfoxide (DMSO) ratio of 3:100 (g/mL), which resulted in the highest 5-HMF yield of 96% and fructose conversion of 100%. The conventional method carried out at optimized conditions resulted in only 13.5% as 5-HMF yield. The obtained 5-HMF was further oxidized to FDCA using Pd/C as the catalyst, H<sub>2</sub>O/DMSO as solvent, and K<sub>2</sub>CO<sub>3</sub> as a base also using ultrasonic irradiation at 140 W power and 22 kHz frequency in the presence and absence of O<sub>2</sub> as oxidant. 100% conversion of 5- HMF was obtained in 30 min and 4 h using ultrasound in the presence of O<sub>2</sub> and in absence of O<sub>2</sub>, respectively. 75% conversion of 5-HMF was observed using the conventional method in 5 h in the presence of O<sub>2</sub>. Overall, the intensification benefits of using ultrasound at both steps of synthesis has been successfully elucidated.</p>","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 2","pages":"786-798"},"PeriodicalIF":1.6,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141646915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Bayesian parameter estimation using truncated normal distributions as priors for parameters in fundamental models of chemical processes","authors":"Lauren A. Gibson, Kimberley B. McAuley","doi":"10.1002/cjce.25398","DOIUrl":"10.1002/cjce.25398","url":null,"abstract":"<p>Modellers of chemical processes with knowledge about plausible parameter values use Bayesian parameter estimation methods to account for their prior beliefs. Some modellers specify prior distributions with finite parameter ranges, such as uniform distributions and truncated normal distributions, because they better account for knowledge about realistic parameter ranges than normal prior distributions with parameter values ranging between <span></span><math>\u0000 <mrow>\u0000 <mo>−</mo>\u0000 <mi>∞</mi>\u0000 </mrow></math> and <span></span><math>\u0000 <mrow>\u0000 <mo>+</mo>\u0000 <mi>∞</mi>\u0000 </mrow></math>. We derive closed-form objective functions for Bayesian parameter estimation with truncated normal priors and uniform priors, for the first time, so that parameter estimation can be performed by solving simple optimization problems rather than using complex sampling-based techniques. A parametric bootstrapping method that considers truncated normal priors and model nonlinearity is proposed to determine 95% confidence intervals and joint confidence regions. A pharmaceutical case study is used to show the effectiveness of the proposed objective functions and bootstrapping methodology. Confidence regions from bootstrapping are similar to linearization-based confidence regions that do not account for truncation when truncated areas in normal prior distributions are relatively small. More truncation, which corresponds to more-precise prior knowledge about the parameters, results in smaller joint confidence regions. The proposed methods will be attractive for parameter estimation in complex process models because they can be less computationally intensive than Markov chain Monte Carlo methods that provide similar results.</p>","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 2","pages":"649-665"},"PeriodicalIF":1.6,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cjce.25398","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141647031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Transesterification reactions as a means to produce esters: A critical review","authors":"Reshma R. Devale, Yogesh S. Mahajan","doi":"10.1002/cjce.25414","DOIUrl":"10.1002/cjce.25414","url":null,"abstract":"<p>Esters are important chemicals used in fine and bulk chemical industry with numerous applications: solvents, paints, varnishes, dyes, and cosmetics. Ester formation is dominated mainly by Fischer esterification and transesterification. Fischer reaction is generally used for ester production, but in certain cases, transesterification can be used with advantage. It is useful when the acid is less soluble in the alcohol or in the solvent used, thus forming two layers. Water formation creates purification problems during esterification reactions due to azeotrope formation and transesterification can be useful in such cases. Commercially, cheaply available methyl and ethyl esters can be conveniently used as raw materials for value added ester production by transesterification. Transesterification is also useful when the parent acids are highly reactive and pose difficulty in separation. Transesterifications are slow reactions and a catalyst is used: acids and bases, ion exchange resins, zeolites, and clays. Homogeneous catalysts were used in the past which are now replaced by their heterogeneous counterparts. Heterogeneous catalysts offer added advantages like reusability, lesser corrosion, and ease of separation. Transesterification can be commercially used to produce a number of esters of industrial importance like acrylics and biodiesel. This review considers all these aspects in considerable detail. A large literature set was scanned and its judicious extract is presented.</p>","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"102 11","pages":"3787-3802"},"PeriodicalIF":1.6,"publicationDate":"2024-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141650272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Vikramaditya R. Shirsat, Prakash D. Vaidya, Vishwanath H. Dalvi, Rekha S. Singhal, Anil K. Kelkar, Jyeshtharaj B. Joshi
{"title":"Kinetics of cashew apple drying through mechanistic models and analysis of the effects of drying conditions on the retention of bioactive compounds","authors":"Vikramaditya R. Shirsat, Prakash D. Vaidya, Vishwanath H. Dalvi, Rekha S. Singhal, Anil K. Kelkar, Jyeshtharaj B. Joshi","doi":"10.1002/cjce.25395","DOIUrl":"10.1002/cjce.25395","url":null,"abstract":"<p>Global cashew nut production is nearly 4 million tons per year, valued at 7 billion US dollars. Remarkably, almost the entire cashew apple crop, amounting to 20 million tons annually, goes to waste. However, the cashew apple contains valuable nutraceutical compounds, including tannins, polyphenols, and carotenoids, estimated to be worth 150 million US dollars annually. Due to the highly perishable nature of cashew apples, degradation is a significant issue. In response, the current work has established drying as an effective preservation technique for these bioactive components. The effect of drying temperature on bioactive compounds has been thoroughly investigated. The non-random two liquid (NRTL) activity coefficient model effectively captures the thermodynamics of the drying process. To facilitate the selection and design of drying equipment, two mechanistic mass transfer models were developed. The first model employs the Maxwell-Stefan framework to account for internal diffusion, with external mass transfer resistance appearing as a boundary condition. While this model works well for products like grapes, it proved inadequate for explaining the drying behaviour of cashew apples. Consequently, a second model was developed, postulating rapid moisture transport by capillary action within the cashew apple. This model effectively captures the effects of a wide range of operating conditions, using only external mass transfer resistance as the tuneable kinetic parameter. This mechanistic model is more suitable for dryer design compared to conventional phenomenological models like the logarithmic model and the two-term exponential model.</p>","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"102 11","pages":"3817-3831"},"PeriodicalIF":1.6,"publicationDate":"2024-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141650253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Paulo A. L. de Souza, Raja Muhammad Afzal, Felipe Gomes Camacho, Nader Mahinpey
{"title":"Catalyst development for the tri-reforming of methane (TRM) process by integrated singular machine learning models","authors":"Paulo A. L. de Souza, Raja Muhammad Afzal, Felipe Gomes Camacho, Nader Mahinpey","doi":"10.1002/cjce.25397","DOIUrl":"10.1002/cjce.25397","url":null,"abstract":"<p>Tri-reforming of methane (TRM) is a promising technology for the simultaneous production of hydrogen and syngas with high energy efficiency (above 70%). However, catalyst design for TRM is challenging due to complex reaction kinetics and the need for catalyst materials with great stability and activity. Machine learning, particularly artificial neural networks (ANNs), has emerged as a powerful tool in catalyst development for the TRM process. More than 6000 data points were selected to build individual models for each reaction and later coupled into an ensembled model used to make predictions considering TRM experimental conditions. The reaction temperature input parameter was found to be the one with major relative importance (61.4%), contributing the most to changes in the CH<sub>4</sub> conversion %. Dry reforming of methane (DRM), steam reforming of methane (SRM), and partial oxidation of methane (POX) models observed errors (RMSE) of 3.44%, 2.20%, 1.61%, respectively, with the ensembled model having a maximum error of 4.48%. The newly devised artificial neural network (ANN) model demonstrates remarkable capability in accurately predicting CH<sub>4</sub> conversion for novel catalyst formulations in the TRM process, exhibiting minimal error deviation.</p>","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 2","pages":"758-770"},"PeriodicalIF":1.6,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141611834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Iman Nowrouzi, Amir H. Mohammadi, Abbas Khaksar Manshad
{"title":"Benchmarking the potential of a resistant green hydrocolloid for chemical enhanced oil recovery from sandstone reservoirs","authors":"Iman Nowrouzi, Amir H. Mohammadi, Abbas Khaksar Manshad","doi":"10.1002/cjce.25400","DOIUrl":"10.1002/cjce.25400","url":null,"abstract":"<p>Polymer injection into oil reservoirs stands as a primary technique for enhanced oil recovery (EOR), employing either natural or synthetic polymers that dissolve in water. Proper performance in salinity and reservoir temperature creates a limitation to replace natural material with common chemicals and this has led researchers to try to identify new material for this application. Continuing the efforts and overcoming the challenge, this research introduces and examines a high-performance natural polymer extracted from garden cress seeds for this application. Several experiments were planned and executed based on the existing EOR standards and literature. Comprehensive analyses and viscosity measurements were performed to identify the behaviour of solutions and the effects of concentration, shear rate, salinity, and temperature. Essential tests such as wettability and polymer adsorption were also done by contact angle measurement and flooding into a sandstone plug, respectively. The produced polymer was able to effectively maintain the viscosification properties at temperatures up to 95°C. Similarly, increasing the salinity up to 140,000 ppm did not affect its efficiency and the viscosity value remained in the useful range. The viscosity of the mature solutions at 35°C after 30 h at concentrations of 200, 400, 600, 800, 1000, and 1200 ppm was 8.61, 18.59, 31.27, 65.41, 95.38, and 149.75 mPa, respectively. At 1000 ppm and temperatures of 35, 55, 75, and 95°C, the viscosity was 95.38, 90.57, 86.73, and 84.72 mPa · s, respectively. At concentrations of 600, 800, and 1000 ppm, the wettability altered to intermediate-wet, while at 1200 ppm, altered to water-wet. Polymer injection caused an increase in recovery equal to 18.6%. The water cut increased with a little delay in the initial volumes of water injection at a high rate and reached its maximum. Then after the injection of 0.3 PV of polymer, there was a sharp and continuous drop until reaching 35% of the production fluid volume.</p>","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 1","pages":"230-250"},"PeriodicalIF":1.6,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cjce.25400","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141611836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Naushad Khan, G. K. V. Rami Reddy, Sandeep Kumar Thaligari, Vimal Chandra Srivastava, Raj Kumar Singh, Anuj Rawat, Paritosh Mohanty
{"title":"A simultaneous study on desulphurization and denitrogenation using acid-treated activated alumina: Multi-component adsorption systems","authors":"Naushad Khan, G. K. V. Rami Reddy, Sandeep Kumar Thaligari, Vimal Chandra Srivastava, Raj Kumar Singh, Anuj Rawat, Paritosh Mohanty","doi":"10.1002/cjce.25392","DOIUrl":"10.1002/cjce.25392","url":null,"abstract":"<p>In this study, sulphuric acid-treated activated alumina (AA) was used for sulphur and nitrogen removal from model fuel in a batch adsorption study. Dibenzothiophene (DBT), a sulphur compound, and quinoline, a nitrogen compound dissolved in isooctane, were taken as a model liquid fuel. Detailed characterization of the adsorbent, such as scanning electron microscopy (SEM), thermogravimetric analysis-differential thermal analysis (TGA-DTA), Fourier transform infrared spectroscopy (FTIR), Brunauer–Emmett–Teller (BET), and X-ray diffraction (XRD), was performed to understand the DBT and quinoline adsorption mechanism onto AA adsorbent. Sulphur and nitrogen removal efficiencies were found to be 64% and 91%, respectively. Mono-component adsorption isotherm was studied by using different models such as Langmuir, Freundlich, and Redlich-Peterson (R-P) isotherms. The R-P isotherm model well-predicted the individual equilibrium data for both nitrogen and sulphur from the liquid fuel. Binary-component adsorption studies were performed by mixing both DBT and quinoline in isooctane. Binary-equilibrium data were modelled by multi-component models such as modified Langmuir isotherm, non-modified Langmuir, extended Langmuir, extended Freundlich isotherm, Sheindorf-Rebuhn-Sheintuch (SRS), non-modified R-P model, and modified R-P model. The extended Freundlich (E-F) adsorption isotherm model was found to best fit the binary equilibrium system.</p>","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 1","pages":"385-395"},"PeriodicalIF":1.6,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141611833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Iman Nowrouzi, Amir H. Mohammadi, Abbas Khaksar Manshad
{"title":"A non-ionic green surfactant extracted from the Anabasis setifera plant for improving bulk properties of CO2-foam in the process of enhanced oil recovery from carbonate reservoirs","authors":"Iman Nowrouzi, Amir H. Mohammadi, Abbas Khaksar Manshad","doi":"10.1002/cjce.25401","DOIUrl":"10.1002/cjce.25401","url":null,"abstract":"<p>Foam, as a gas-in-liquid colloid, has a higher appearance viscosity than the one of both gas and liquid that form it. Adjusting the mobility ratio of the injected fluid–oil system and increasing gas diffusion in the foam injection process increase oil production. With these properties, foam as an injection fluid in fractured reservoirs has a major effect on oil production from the matrixes and prevents premature production of injection fluid. Surfactants are common foaming agents in injection water. Saponins are known as plant-derived surfactants for forming stable foam. This feature, along with its cheap price and availability, can make them candidates for enhanced oil recovery (EOR) by the foam injection method. However, the utilization of CO<sub>2</sub> as the gaseous phase in foam introduces additional machanisms of CO<sub>2</sub> injection to the oil recovery operations. In this assessment, a non-ionic green surfactant derived from the <i>Anabasis setifera</i> plant was used as a foaming agent, while CO<sub>2</sub> served as the gas phase. A series of surface tension tests in CO<sub>2</sub> environment were performed to determine the optimal concentration of the surfactant. Foaming tests were performed by a designed foam generator. The produced CO<sub>2</sub>-foam was then injected into a fractured carbonate plug with six matrixes (with one horizontal and two vertical fractures). Based on the results, the water–CO<sub>2</sub> surface tension was reduced to 20.549 mN/m. The optimum salinity based on the foam stability was 10,000 ppm. The half-life of the foam was determined to be 40 min. Also, the foam characterization showed that the foamability of the surfactant was favourable for increasing oil production so that by secondary flooding, an oil recovery of more than 66% was achieved from the fractured carbonate plug.</p>","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 2","pages":"590-605"},"PeriodicalIF":1.6,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cjce.25401","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141611835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}