Chemical Engineering Journal Advances最新文献

{"title":"Gas phase product evolution during high temperature pyrolysis of PTFE: Development of ReaxFF simulation protocol","authors":"Aaron D. Ajeti,&nbsp;Shubham Vyas","doi":"10.1016/j.ceja.2024.100622","DOIUrl":"https://doi.org/10.1016/j.ceja.2024.100622","url":null,"abstract":"<div><p>The formation of products of incomplete destruction (PIDs) from fluoropolymer incineration is poorly understood and it is imperative to environmental impact studies. The lack of analytical standards limits the experimental approaches targeting product analysis. To navigate this challenge, computational modeling of the thermal degradation of fluoropolymers provides simulated product distributions. However, it is essential to benchmark reactive forcefields to accurately simulate fluoropolymer pyrolysis. The present work describes a protocol to perform accurate simulations of the thermal degradation of fluoropolymers to probe the PIDs. The ReaxFF force field was applied to reproduce the experimental bulk density and glass transition temperature of polytetrafluoroethylene (PTFE). The benchmarked methodology developed has been extended to provide simulated product distributions and mechanistic insights which are in excellent agreement with primary literature. On the basis of our simulated data, we observe a degradation mechanism that proceeds through three primary steps: <strong>1)</strong> initiation of random backbone cleavage, <strong>2)</strong> C₂F₄ unzipping through β–scission (as opposed to CF₂ unzipping), and <strong>3)</strong> secondary product formation. An extension of the developed protocol has the potential to simulate the thermal degradation of non-polymeric per- and polyfluoroalkyl substances (PFASs) in addition to long-chain fluoropolymers.</p></div>","PeriodicalId":9749,"journal":{"name":"Chemical Engineering Journal Advances","volume":"19 ","pages":"Article 100622"},"PeriodicalIF":5.5,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666821124000401/pdfft?md5=f41388f52034075fffe0cf62a014b8cf&pid=1-s2.0-S2666821124000401-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141592963","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":"Exploring the role of hydrogen peroxide dosage strategies in the photo-Fenton process: Scaling from lab-scale to pilot plant solar reactor","authors":"Bárbara N. Giménez ,&nbsp;Agustina V. Schenone ,&nbsp;Leandro O. Conte","doi":"10.1016/j.ceja.2024.100627","DOIUrl":"https://doi.org/10.1016/j.ceja.2024.100627","url":null,"abstract":"<div><p>This study aims to investigate the role of hydrogen peroxide (HP) continuous dosage in removing Paracetamol (PCT) from different water matrices using the solar photo-Fenton process. Different parameters in the HP dosage strategies (initial HP pulse, dosing time, and HP concentration) were systematically analysed to assess their impacts on pollutant removal (<em>X_PCT</em>), oxidant specific consumption (<span><math><msubsup><mi>Y</mi><mrow><mi>H</mi><mi>P</mi><mo>/</mo><mi>P</mi><mi>C</mi><mi>T</mi></mrow><mi>t</mi></msubsup></math></span>), and toxicity levels (<em>I</em>(%)). The analysis involved various water matrices (ultrapure water UW, groundwater GW, anion matrix AW, and synthetic pharmaceutical wastewater IW0.01 or IW0.1), which were firstly treated in a laboratory reactor and subsequently scaled up to a solar prototype. After laboratory testing, the most effective reaction configuration (maximum <em>X_PCT</em> and <span><math><msubsup><mi>Y</mi><mrow><mi>H</mi><mi>P</mi><mo>/</mo><mi>P</mi><mi>C</mi><mi>T</mi></mrow><mi>t</mi></msubsup></math></span> close to the stoichiometric one) was chosen as the starting point for scaling up the reaction system. Using the solar reactor setup, complete PCT conversion was achieved within just 60 min of reaction time (UW matrix). However, under IW0.1 condition and employing the same HP dosing strategy, a <em>X_PCT</em> of 95.4 % was attained but at 180 min of reaction, highlighting the significant influence of the real matrix. Additionally, the <em>I</em>(%) remained high towards the end of the reaction (close to 60 %), attributed to the presence of hydroquinone in the system, demanding longer reaction times to completely reduce the toxicity when working with industrial wastewater. This comprehensive approach aims to close the gap between lab results and practical applications, offering crucial insights to address pharmaceutical wastewater pollution.</p></div>","PeriodicalId":9749,"journal":{"name":"Chemical Engineering Journal Advances","volume":"19 ","pages":"Article 100627"},"PeriodicalIF":5.5,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666821124000450/pdfft?md5=c1feecb6bae818c8152cbb0a37c66fe9&pid=1-s2.0-S2666821124000450-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141592962","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":"Advances in copper-based catalysts for sustainable hydrogen production via methanol steam reforming","authors":"Ahmad Muhammad Abiso ,&nbsp;Opeoluwa Olusola Fasanya ,&nbsp;Muhammad Yusuf Suleiman ,&nbsp;Abdulazeez Yusuf Atta ,&nbsp;Joydeep Dutta ,&nbsp;Baba El-Yakub Jibril","doi":"10.1016/j.ceja.2024.100625","DOIUrl":"https://doi.org/10.1016/j.ceja.2024.100625","url":null,"abstract":"<div><p>Efficient hydrogen production through Methanol Steam Reforming (MSR) is an area of high importance due to its environmental suitability and superior energy efficiency compared to methane steam reforming. Therefore, we present a comprehensive investigation into the development of copper-based catalysts for MSR. Over the past decades, research in this domain has intensified, encompassing Cu-based catalysts that exhibit notable promise. Strategies to enhance catalytic activity and stability involve the utilisation of mesoporous support materials with tuneable properties, novel promoters, and the introduction of mixed oxides and metal organic framework amongst others. Furthermore, the paper underscores the significance of catalyst morphology and metal precursors in determining their final performance. Several new catalysts have shown remarkable selectivity for hydrogen while minimizing carbon monoxide production even at elevated temperatures, positioning them as strong candidates for environmentally friendly commercial hydrogen production through methanol steam reforming. Valuable insights into synthesis approaches and catalyst performance variations across different research groups are also presented.</p></div>","PeriodicalId":9749,"journal":{"name":"Chemical Engineering Journal Advances","volume":"19 ","pages":"Article 100625"},"PeriodicalIF":5.5,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666821124000437/pdfft?md5=a5b3b4816d7010670a9414eccd97025b&pid=1-s2.0-S2666821124000437-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141593020","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":"Electro-mechanical analysis of nanostructured polymer matrix composite materials for 3D printing using machine learning","authors":"Md.Imran Hossain ,&nbsp;Mohammad Asaduzzaman Chowdhury ,&nbsp;Shaim Mahamud ,&nbsp;Rotan Kumar Saha ,&nbsp;Md.Shovon Zahid ,&nbsp;Jannatul Ferdous ,&nbsp;Nayen Hossain ,&nbsp;Md Hosne Mobarak","doi":"10.1016/j.ceja.2024.100626","DOIUrl":"https://doi.org/10.1016/j.ceja.2024.100626","url":null,"abstract":"<div><p>Recently, additive manufacturing (AM) techniques like 3D printing have emerged as a potentially game-changing example of digital manufacturing. However, high entry barriers of a tiny material library, different processing defects, and unpredictable product quality are still holding back its widespread use in the industry. Due to its remarkable success in data tasks like classification, regression, and clustering, machine learning (ML) has recently gained a great deal of interest in the subject of the material library. This paper examines the current state of ML applications in several key areas of AM, including polymer matrix composite materials and machine parameter optimization. Composite filaments have been extruded using Polylactic Acid (PLA) as it is a biodegradable material and shows how High-Density Poly Ethylene (HDPE) enhances physical strength. All the parameters for the filament extruder have been designed by machine learning. Thermal stability is a significant concern for polymers that have been overcome by introducing Titanium Dioxide nanoparticles. The microstructure, surface texture, electro-mechanical behavior, and other general features of extruded filaments made from recycled plastics have been investigated. The extrusion temperature, approximated using ML, is in excellent agreement with the surface texture and microstructure of the polymers, as confirmed by FESEM, EDX, and Particle analysis. Extruded filaments experienced 2500 Vs and confirmed their non-conductivity up to 77.7GΩ. Tensile strength and elongation at break, two measures of mechanical properties, have been examined. Incorporation of Titanium Dioxide Nanoparticles improved mechanical properties significantly. When it comes to 3D printing, the physical properties and potential uses of each composite material are different.</p></div>","PeriodicalId":9749,"journal":{"name":"Chemical Engineering Journal Advances","volume":"19 ","pages":"Article 100626"},"PeriodicalIF":5.5,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666821124000449/pdfft?md5=b294f31ffe8f418f8ef36c0bdeea8526&pid=1-s2.0-S2666821124000449-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141542536","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":"Torrefied biomass quality prediction and optimization using machine learning algorithms","authors":"Muhammad Hamza Naveed ,&nbsp;Jawad Gul ,&nbsp;Muhammad Nouman Aslam Khan ,&nbsp;Salman Raza Naqvi ,&nbsp;Libor Štěpanec ,&nbsp;Imtiaz Ali","doi":"10.1016/j.ceja.2024.100620","DOIUrl":"https://doi.org/10.1016/j.ceja.2024.100620","url":null,"abstract":"<div><p>Torrefied biomass is a vital green energy source with applications in circular economies, addressing agricultural residue and rising energy demands. In this study, ML models were used to predict durability (%) and mass loss (%). Firstly, data was collected and preprocessed, and its distribution and correlation were analyzed. Gaussian Process Regression (GPR) and Ensemble Learning Trees (ELT) were then trained and tested on 80 % and 20 % of the data, respectively. Both machine learning models underwent optimization through Genetic Algorithm (GA) and Particle Swarm Optimization (PSO) for feature selection and hyperparameter tuning. GPR-PSO demonstrates excellent accuracy in predicting durability (%), achieving a training R² score of 0.9469 and an RMSE value of 0.0785. GPR-GA exhibits exceptional performance in predicting mass loss (%), achieving a training R² value of 1 and an RMSE value of 9.7373e-05. The temperature and duration during torrefaction are crucial variables that are in line with the conclusions drawn from previous studies. GPR and ELT models effectively predict and optimize torrefied biomass quality, leading to enhanced energy density, mechanical properties, grindability, and storage stability. Additionally, they contribute to sustainable agriculture by reducing carbon emissions, improving cost-effectiveness, and aiding in the design and development of pelletizers. This optimization not only increases energy density and grindability but also enhances nutrient delivery efficiency, water retention, and reduces the carbon footprint. Consequently, these outcomes support biodiversity and promote sustainable agricultural, ecosystem, and environmental practices.</p></div>","PeriodicalId":9749,"journal":{"name":"Chemical Engineering Journal Advances","volume":"19 ","pages":"Article 100620"},"PeriodicalIF":5.5,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666821124000383/pdfft?md5=2734b70bfff1d0f46e62c709ac8ea9b5&pid=1-s2.0-S2666821124000383-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141484498","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":"A novel fluorescence sensor film for hydroquinone based on a graphene quantum dots-nano activated carbon composite","authors":"Nutthaya Butwong ,&nbsp;Sothearoth Heng ,&nbsp;Thidarat Kunawong ,&nbsp;Pimpanitpa Kunthadong ,&nbsp;Siriboon Mukdasai ,&nbsp;Pikaned Uppachai","doi":"10.1016/j.ceja.2024.100623","DOIUrl":"https://doi.org/10.1016/j.ceja.2024.100623","url":null,"abstract":"<div><p>A novel film sensor, composed of graphene quantum dots-nano activated carbon, chitosan, and PVA, offers a simple and effective hydroquinone (HQ) detection. This film exhibits impressive HQ adsorption under ambient conditions (room temperature, pH 7, 3 h) and utilizes a readily observable fluorescence color change for quantification. Upon HQ binding, the film's fluorescence color shifts from yellow-green to blue, enabling a linear detection range of 1.0–150 mg⋅<em>L</em>⁻¹ based on intensity analysis of the blue component (B value). Calibration curves generated on the same day (<em>n</em> = 3) exhibit high precision, with standard deviations of the linear equation parameters below 0.014 and a low detection limit of 0.5 mg⋅<em>L</em>⁻¹. The film exhibits exceptional stability, retaining its color and performance for up to 20 days. This stability is further corroborated by recovery experiments utilizing HQ-spiked water samples at concentrations of 2.5 mg⋅<em>L</em>⁻¹ and 40 mg⋅<em>L</em>⁻¹, where recoveries of 106 % and 95 % were achieved, respectively. These results demonstrated the sensor's reliable quantification capabilities. Notably, the sensor exhibited insignificant interference from commonly co-existing substances such as ethanol, ascorbyl glucoside, arbutin, kojic acid, and methylene blue. However, Cu²⁺, Fe³⁺, and catechol did cause some interference. This versatility, coupled with its straightforward operation, makes the film sensor a promising candidate for on-site HQ detection in diverse environmental monitoring applications.</p></div>","PeriodicalId":9749,"journal":{"name":"Chemical Engineering Journal Advances","volume":"19 ","pages":"Article 100623"},"PeriodicalIF":5.5,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666821124000413/pdfft?md5=88d54837712fe5e8cfe974e416fcbf68&pid=1-s2.0-S2666821124000413-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141481306","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":"An efficient and scalable melt fiber spinning system to improve enzyme-based PET recycling","authors":"Matthew Colachis,&nbsp;Nathan Clark,&nbsp;Ashley Frank,&nbsp;Edward B. Trigg,&nbsp;Colin Hinton,&nbsp;Greg Gregoriades,&nbsp;Vance Gustin,&nbsp;Ryan Daly,&nbsp;Rachel Thurston,&nbsp;Bryon Moore,&nbsp;Katarzyna H. Kucharzyk,&nbsp;Jacob L. Lilly","doi":"10.1016/j.ceja.2024.100624","DOIUrl":"https://doi.org/10.1016/j.ceja.2024.100624","url":null,"abstract":"<div><p>Chemical recycling technologies based on hydrolase enzymes that can depolymerize PET thermoplastic are emerging, yet these approaches require the polymer to be low crystallinity to achieve high conversion. To prepare the polymer for enzymatic depolymerization, current processes rely on melting and cryomilling PET at depressed temperatures to reduce crystallinity and prevent annealing during micronization; however, these approaches require large capital investment in costly equipment, and are not easily incorporated into intermediate-scale, distributed systems. Here, we describe a melt fiber spinning system that achieves significant reduction in crystallinity for real-world PET feedstocks without the need for any active cooling, and can easily be scaled up or down as needed. Single-use water bottles and drinking cups are tested, where they are extruded, drawn and spooled as thin fibers that cool by passive heat dissipation rapidly enough to quench the polymer to low crystallinity (&lt;10%). Additionally, we estimate the fiber spinning also increases the feedstock surface-area-to-volume ratio by up to 15-fold, which further benefits heterogenous enzyme biocatalysis. In small scale PET hydrolase enzyme incubation tests, fiber spinning increased monomer released from PET by 4-fold for drinking cups and 10-fold for water bottles compared to shredded-only controls. Finally, we also show that this system can scale to &gt;300 gs, with the potential for much larger scales, and allows for &gt;95% depolymerization in a larger 20 liter bioreactor run.</p></div>","PeriodicalId":9749,"journal":{"name":"Chemical Engineering Journal Advances","volume":"19 ","pages":"Article 100624"},"PeriodicalIF":5.5,"publicationDate":"2024-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666821124000425/pdfft?md5=c920fd07d9ae7660fc33a56405884389&pid=1-s2.0-S2666821124000425-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141484497","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":"Enhancing nanoplastics removal by metal ion-catalyzed ozonation","authors":"Julia Nieto-Sandoval,&nbsp;Reyhan Ammar,&nbsp;Carmen Sans","doi":"10.1016/j.ceja.2024.100621","DOIUrl":"https://doi.org/10.1016/j.ceja.2024.100621","url":null,"abstract":"<div><p>Nanoplastics (NPs), characterized by sizes &lt; 1 µm, are not completely removed in conventional drinking water treatment plants affecting human health. Catalytic ozonation appears as a promising alternative due to its ability to oxidize emerging pollutants by generating hydroxyl radicals with higher removal rate and mineralization than single ozonation. In this work, catalytic ozonation was investigated for the removal of polystyrene nanoplastics (PSNPs) by employing transition metal ion catalysts, Fe³⁺, Co²⁺, Ni²⁺, and Zn²⁺. The single ozonation of PSNPs, in the absence of catalyst, led to low turbidity reduction (33 %) and low mineralization rate (16 %) even after 2 h reaction time. Nevertheless, the rapid size reduction of PSNPs by &gt;99 % in less than 5 min of ozonation (TOD: 30 mg <em>L</em>⁻¹) was confirmed. This fact could imply a new issue under the ozone disinfection conditions by the formation of smaller-size particles. However, in the presence of Co²⁺ (1 mM), the highest PSNPs ozonation performance was achieved, decreasing the turbidity up to 65 % and achieving 70 % of mineralization in the same ozonation time. The scavenger experiments with methanol confirmed that direct ozonation and catalyst role were responsible for PSNPs degradation, with the generation of •OH being the most dominant catalytic mechanism. Therefore, although single ozonation at disinfection doses reduced the particle size of PSNPs, the catalytic process demonstrated greater efficacy in the total removal of PSNPs. These results highlight the need to further investigate ozonation of NPs intermediates, and the synergic improvements of catalytic ozonation for their mineralization.</p></div>","PeriodicalId":9749,"journal":{"name":"Chemical Engineering Journal Advances","volume":"19 ","pages":"Article 100621"},"PeriodicalIF":0.0,"publicationDate":"2024-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666821124000395/pdfft?md5=b5f0c0aa533072992b91b2e4311de732&pid=1-s2.0-S2666821124000395-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141423707","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":"The effect of temperature and dissolved organic components on the film thinning between droplets and bubbles","authors":"Martina Piccioli,&nbsp;Dionysia Kouranou,&nbsp;Marcin Dudek,&nbsp;Gisle Øye","doi":"10.1016/j.ceja.2024.100619","DOIUrl":"10.1016/j.ceja.2024.100619","url":null,"abstract":"<div><p>Treatment of produced water (PW) is a major issue in the petroleum industry and gas flotation is an efficient treatment method that relies on the generation of gas bubbles and their attachment to oil droplets. Formation of an oil film over the gas bubbles provides stable aggregates, and quick attachment is a key-step for efficient gas flotation. Here we investigated how the temperature and the dissolved organic components in the water phase influenced the film thinning process between approaching droplets and bubbles using a microfluidic method. Information about drop-bubble attachment times, bubble-bubble coalescence times, and size distributions of drops and bubbles were retrieved by image analysis. The dissolved components stabilized the gas bubbles through adsorption at the interface. This slowed down the film thinning and prolonged the bubble coalescence and drop-bubble attachment times. Increasing the temperature reduced the drainage times due to reduced viscosity. In all cases bubble coalescence was faster than drop-bubble attachment. The results were discussed in view of previous gas flotation studies and the oil removal trends agreed well with the trends observed for film thinning processes.</p></div>","PeriodicalId":9749,"journal":{"name":"Chemical Engineering Journal Advances","volume":"19 ","pages":"Article 100619"},"PeriodicalIF":0.0,"publicationDate":"2024-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666821124000371/pdfft?md5=2dde2a311857ee5b080f8fd74810c1fc&pid=1-s2.0-S2666821124000371-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141416373","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":"A comprehensive review on control and mitigating the foam formation in amine-based solvents","authors":"Reza Shahouni ,&nbsp;Mohsen Abbasi ,&nbsp;Mohammad Akrami","doi":"10.1016/j.ceja.2024.100618","DOIUrl":"10.1016/j.ceja.2024.100618","url":null,"abstract":"<div><p>Amine solvent processes are often confronted with the problem of foaming, which can lead to reduced amine efficiency in H2S and CO2 absorption. To this end, it is crucial to investigate the causes of foaming in amine systems and develop a procedure to effectively combat this problem. According to this research, the main causes of foaming in amine solutions are hydrocarbon condensate, suspended solids, amine degradation products, corrosion inhibitors and operating parameters. To prevent foaming in the scrubber, it is important to use filter coalescers, activated carbon, and precoat filters that can remove solid particles and hydrocarbon mists from the feed gas and amine solution. It is also recommended to maintain the amine inlet temperature at 5–10 °C above the dew point of the feed gas to prevent the hydrocarbons from condensing in the scrubber. Foaming can be significantly influenced by unsaturated fatty acids even in small amounts of 10 ppm in the amine solution. Acetic acid and octanoic acid are also notable amine degradation byproducts that can reduce foam volume by 25% and 23%, respectively. On the other hand, piperazine and bicine are other amine byproducts that can significantly impact the foam breaking time by 467% and 344%, respectively. To prevent amine degradation, it is recommended to maintain the temperature of the amine at 125–130 °C in the stripper and at 40–45 °C in the scrubber. To effectively manage and control foaming in amine solutions, a comprehensive procedure is advised to control and mitigate this issue. Lastly, future areas of research have been identified to address the problem of foam in amine systems.</p></div>","PeriodicalId":9749,"journal":{"name":"Chemical Engineering Journal Advances","volume":"19 ","pages":"Article 100618"},"PeriodicalIF":0.0,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S266682112400036X/pdfft?md5=02d5f828cfb50f3808297bfe2af0b43c&pid=1-s2.0-S266682112400036X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141132337","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}