Brazilian Journal of Chemical Engineering最新文献_第9页

Diazinon degradation in water applying glow discharge plasma technology 利用辉光放电等离子体技术降解水中的二嗪农

IF 1.2 4区工程技术

Brazilian Journal of Chemical Engineering Pub Date : 2024-01-04 DOI: 10.1007/s43153-023-00427-7

Francisco E. Rodrigues, Fabiano A. N. Fernandes

引用次数: 0

Development of a novel semi-empirical kinetic model applied to photocatalysis under UVC and solar radiation 开发适用于紫外线和太阳辐射下光催化的新型半经验动力学模型

IF 1.2 4区工程技术

Brazilian Journal of Chemical Engineering Pub Date : 2023-12-14 DOI: 10.1007/s43153-023-00424-w

Débora Maria dos Santos, Mayane D’Albuquerque Irineu, Ramon Vinícius Santos de Aquino, Ada Azevedo Barbosa, Josivan Pedro da Silva, José Marcos Francisco da Silva, Renato Falcão Dantas, Otidene Rossiter Sá da Rocha

{"title":"Development of a novel semi-empirical kinetic model applied to photocatalysis under UVC and solar radiation","authors":"Débora Maria dos Santos, Mayane D’Albuquerque Irineu, Ramon Vinícius Santos de Aquino, Ada Azevedo Barbosa, Josivan Pedro da Silva, José Marcos Francisco da Silva, Renato Falcão Dantas, Otidene Rossiter Sá da Rocha","doi":"10.1007/s43153-023-00424-w","DOIUrl":"https://doi.org/10.1007/s43153-023-00424-w","url":null,"abstract":"In this work, the degradation of the fast green dye FCF (FG) by means of photocatalysis under natural solar and UVC radiation was studied. The following degradation parameters were evaluated: catalyst type, catalyst dosage, initial dye concentration and pH. Phytotoxicity evaluation was also carried out using Lactuca sativa seeds. ZnO promoted better degradation rates in both radiations, under the best experimental conditions (0.06 g of catalyst, 10 mg L−1 of FG and pH = 6). A generalist kinetic model was developed in order to allow its broad use in a wide range of photodegradation systems. The developed kinetic model was able to fit to the total set of generated data with a coefficient of determination R2 = 0.95. The phytotoxicity tests showed an increase in the relative growth of the roots after treatment, indicating a reduction in toxicity of the solution and the efficiency of the process.","PeriodicalId":9194,"journal":{"name":"Brazilian Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138680602","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}

引用次数: 0

Comparison of reinforcement learning techniques for controlling a CSTR process 用于控制 CSTR 工艺的强化学习技术比较

IF 1.2 4区工程技术

Brazilian Journal of Chemical Engineering Pub Date : 2023-12-11 DOI: 10.1007/s43153-023-00422-y

Eric Monteiro L. Luz, Wouter Caarls

{"title":"Comparison of reinforcement learning techniques for controlling a CSTR process","authors":"Eric Monteiro L. Luz, Wouter Caarls","doi":"10.1007/s43153-023-00422-y","DOIUrl":"https://doi.org/10.1007/s43153-023-00422-y","url":null,"abstract":"One of the main promises of Industry 4.0 is the incorporation of computational intelligence techniques in industrial process control. For the chemical industry, the efficiency of the control strategy can reduce the production of effluents and the consumption of raw materials and energy. A possible, although currently underutilized approach is reinforcement learning (RL), which can be used to optimize many sequential decision making processes through training. This work used Van de Vusse kinetics as an evaluation environment for controllers based on reinforcement learning and comparison with conventional solutions like non-linear model predictive control (NMPC). These kinetics contain characteristics that make it difficult for classic controllers such as PID to handle, such as its non-linearity and inversion point. The investigated algorithms showed excellent results for this notable chemical process control benchmark. This study was divided into two experiments: setpoint change and operation around the inversion point. The former showed the ability of RL controllers to adjust the controlled variable and simultaneously maximize production. The latter revealed the excellent management capability of the reinforcement learning algorithms and NMPC at the inversion point. In this study, the RL algorithms performed similar to NMPC but with lower computational cost after training.","PeriodicalId":9194,"journal":{"name":"Brazilian Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138575844","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}

引用次数: 0

Biogenic approach for synthesis of ZnO/NiO nanocomposites as a highly efficient photocatalyst and evaluation of their biological properties 用生物方法合成作为高效光催化剂的 ZnO/NiO 纳米复合材料并评估其生物特性

IF 1.2 4区工程技术

Brazilian Journal of Chemical Engineering Pub Date : 2023-12-11 DOI: 10.1007/s43153-023-00421-z

T. D. Puttaraju, T. L. Soundarya, G. Nagaraju, K. Lingaraju, M. V. Manjula, S. Devaraja, M. Manjunatha

{"title":"Biogenic approach for synthesis of ZnO/NiO nanocomposites as a highly efficient photocatalyst and evaluation of their biological properties","authors":"T. D. Puttaraju, T. L. Soundarya, G. Nagaraju, K. Lingaraju, M. V. Manjula, S. Devaraja, M. Manjunatha","doi":"10.1007/s43153-023-00421-z","DOIUrl":"https://doi.org/10.1007/s43153-023-00421-z","url":null,"abstract":"Mixed metal oxide-based nanocomposites (NCs) have remained broadly used for photocatalysis-facilitated elimination of harmful substances from the aquatic ecosystem. Nowadays, searching for an improved photocatalyst looks plentiful; metal oxide-based materials have begun to emerge from studies. In the present work, the use of ZnO/NiO NCs as photocatalytic treatment of wastewater utilizing oxides of metals as photocatalysts has become a subject of major concern. The way of coupling with other semiconductors for improved photodegradation in the presence of UV-visible light. NCs were mainly characterized by XRD, FT-IR, UV-DRS, morphological studies such as SEM and TEM, and elemental composition by EDAX, which all affirmed the effective synthesis of NCs. For instance, ZnO/NiO NCs having a bandgap of about 3.11 eV achieved outstanding degradation activity toward 100% photodegradation of methylene blue (MB) within a short period of time. Further, prepared ZnO/NiO NCs have excellent antibacterial activity against both Gram-negative and Gram-positive bacteria. This behavior is primarily caused by the accumulation of ZnO/NiO NCs on the bacteria’s surface, which results in cytotoxic bacteria and a relatively increased ZnO, resulting in cell death. Also, ZnO/NiO NCs exhibit essential, harmless effects on human red blood cells and their intervention with the action of clotting on both PPP and PRP in human erythrocytes. As an outcome, the studies have shown that Phyllanthus Niruri (L) mediated synthesis by combustion methods performs well as a good capping agent to synthesize ZnO/NiO NCs with important multi-disciplinary applications.<h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\u0000","PeriodicalId":9194,"journal":{"name":"Brazilian Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138568879","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}

引用次数: 0

Surface modification of polyetherimide/polyvinylpyrrolidone membranes via covalent grafting of heparin: in vitro evaluation of hemocompatibility 通过共价接枝肝素对聚醚酰亚胺/聚乙烯吡咯烷酮膜进行表面改性：血液相容性体外评估

IF 1.2 4区工程技术

Brazilian Journal of Chemical Engineering Pub Date : 2023-12-11 DOI: 10.1007/s43153-023-00417-9

Alana Melo dos Santos, Alberto Claudio Habert, Helen Conceição Ferraz, Carlos Arthur Cardoso Almeida

{"title":"Surface modification of polyetherimide/polyvinylpyrrolidone membranes via covalent grafting of heparin: in vitro evaluation of hemocompatibility","authors":"Alana Melo dos Santos, Alberto Claudio Habert, Helen Conceição Ferraz, Carlos Arthur Cardoso Almeida","doi":"10.1007/s43153-023-00417-9","DOIUrl":"https://doi.org/10.1007/s43153-023-00417-9","url":null,"abstract":"Heparin is a well-known substance commonly introduced in the bloodstream in many medical procedures to avoid thrombogenicity. Polymer membranes used for biomedical applications, such as in hemodialysis and blood oxygenators, must also have good antithrombogenic and biocompatibility characteristics. Recently developed polyetherimide/polyvinylpyrrolidone (PEI/PVP) hollow fiber membranes showed good potential as an alternative to clinically available membranes, as evaluated by the transport properties of blood-targeted molecules relevant in the treatment of patients with renal chronic diseases. Aiming at improving the hemocompatibility of these membranes, the incorporation of heparin onto their surface was sought as a promising attempt to achieve this goal. In this work, flat sheet PEI/ PVP membranes were prepared by the phase inversion technique and were functionalized through the covalent grafting of heparin. Characterization included the follow-up of hydrophilicity, protein adsorption, prothrombin time (PT), activated partial thromboplastin time (aPTT), hemolysis occurrence, platelet adhesion, and complement system activation. The results showed that heparinization resulted in more hydrophilic membranes (contact angle reduced from 76.5° to 58.5°) and in the reduction of protein adsorption by more than 50%. In contact with human blood, these membranes reduced the occurrence of platelet adhesion, increased aPTT from 34 to 46 s, and did not lead to complement system activation. Such PEI/PVP membranes have therefore remarkable antithrombogenic and biocompatibility characteristics, which are highly desired for use in biomedical applications such as hemodialysis filters.","PeriodicalId":9194,"journal":{"name":"Brazilian Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138568872","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}

引用次数: 0

High local supersaturation formation for precipitated calcium carbonate synthesis by applying a rotating disk reactor 应用转盘式反应器合成沉淀碳酸钙形成高局部过饱和

IF 1.2 4区工程技术

Brazilian Journal of Chemical Engineering Pub Date : 2023-12-01 DOI: 10.1007/s43153-023-00423-x

Kazem Adavi, Danial Tahery, Mohammad Khajouei, Mohammad Latifi

引用次数: 0

ESI-FT-ICR MS in the identification and characterization of tetrameric acids (ARN) in petroleum and naphthenates with minimal sample preparation ESI-FT-ICR质谱在石油和环烷酸酯中四聚酸(ARN)鉴定和表征中的应用

IF 1.2 4区工程技术

Brazilian Journal of Chemical Engineering Pub Date : 2023-11-29 DOI: 10.1007/s43153-023-00416-w

Eliane Valéria de Barros, Thieres Magaive Costa Pereira, Lindamara Maria Souza, Luiz Silvino Chinelatto, Valdemar Lacerda, Wanderson Romão

{"title":"ESI-FT-ICR MS in the identification and characterization of tetrameric acids (ARN) in petroleum and naphthenates with minimal sample preparation","authors":"Eliane Valéria de Barros, Thieres Magaive Costa Pereira, Lindamara Maria Souza, Luiz Silvino Chinelatto, Valdemar Lacerda, Wanderson Romão","doi":"10.1007/s43153-023-00416-w","DOIUrl":"https://doi.org/10.1007/s43153-023-00416-w","url":null,"abstract":"Naphthenate deposits are a major obstacle in ensuring an economic and successful flow in the production and processing of crude oil. The formation of these deposits depends mainly on a specific group of high molecular weight tetrameric acids, sometimes called ARN. Among the challenges of identifying and characterizing the ARN of this complex matrix, we propose the use of a new analysis methodology for identifying these species in oil samples and naphthenate deposits with minimal sample preparation. Such methodology is based on an unconventional approach to the negative-mode electrospray ionization technique, combined with high resolution and precision mass spectrometry. The methodology proved to be promising and advantageous, since it requires a simpler sample preparation and a reduced consumption of reagents and analysis time. With good feasibility of application to identify the nature of deposits and to estimate, in an initial phase, the potential for inorganic scale and the need for oil treatment in production units.","PeriodicalId":9194,"journal":{"name":"Brazilian Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138513542","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}

引用次数: 0

Biogas production through anaerobic co-digestion of rice husk and plantain peels: investigation of substrate mixing ratios, digestate quality, and kinetic analysis 稻壳和车前草皮厌氧共消化生产沼气:基质混合比例、消化质量和动力学分析的研究

IF 1.2 4区工程技术

Brazilian Journal of Chemical Engineering Pub Date : 2023-11-27 DOI: 10.1007/s43153-023-00415-x

Akinola David Olugbemide, Labunmi Lajide, Blaz Likozar, Augustine Ighodaro, Ojo Cyprian Bella-Omunagbe, Ikhazuagbe Hilary Ifijen

{"title":"Biogas production through anaerobic co-digestion of rice husk and plantain peels: investigation of substrate mixing ratios, digestate quality, and kinetic analysis","authors":"Akinola David Olugbemide, Labunmi Lajide, Blaz Likozar, Augustine Ighodaro, Ojo Cyprian Bella-Omunagbe, Ikhazuagbe Hilary Ifijen","doi":"10.1007/s43153-023-00415-x","DOIUrl":"https://doi.org/10.1007/s43153-023-00415-x","url":null,"abstract":"The increasing accumulation of agricultural residues like rice husk (RH) and plantain peels (PP) poses environmental challenges, necessitating efficient waste management strategies. The study explores the potential of anaerobic co-digestion (AcoD) as a sustainable solution, specifically investigating its capacity for biogas generation from these agricultural residues. The primary objective is to determine the optimal substrate mixing ratios (SMRs) to maximize biogas yield. In-depth examination revealed that the highest biogas production reached a significant 2880 mL with a blend of 60% RH and 40% PP (RH60PP40). Additionally, the 80% RH and 20% PP composite (RH80PP20) demonstrated a substantial yield of 1996 mL. However, when plantain peels were used as the major substrate, biogas outputs decreased to 1250 mL and 173 mL for RH40PP60 and RH20PP80, respectively. Synergistic indexes (SI), measuring compatibility, reported values of 1.36 and 1.96 for the most promising samples, underscoring their optimal blending for biogas enhancement. From the perspective of digestate quality, plantain peel-based digestate (PP100D) stood out as a leading biofertilizer candidate due to its enriched nutrient profile. For the kinetic analysis, the logistic model was identified as the most predictive, outperforming the exponential and modified Gompertz models in mapping biogas production dynamics. Conclusively, the study accentuates that strategically optimized anaerobic co-digestion (AcoD) of RH and PP not only amplifies biogas outputs but also presents a viable, sustainable avenue for managing the environmental concerns associated with unchecked agricultural residue accumulation.","PeriodicalId":9194,"journal":{"name":"Brazilian Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138513539","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}

引用次数: 0

The role of dielectric properties in the microwave glycerol acetylation and gaseous emissions of blended biodiesel 介电性质在混合生物柴油微波甘油乙酰化及气体排放中的作用

IF 1.2 4区工程技术

Brazilian Journal of Chemical Engineering Pub Date : 2023-11-27 DOI: 10.1007/s43153-023-00418-8

Jonas Miguel Priebe, Eduardo G. R. Taques Filho, Evandro L. Dall’Oglio, Leonardo Gomes de Vasconcelos, Letícia Barbosa Ceron, Paulo T. de Sousa, Flávio Telles, Carlos Alberto Kuhnen

{"title":"The role of dielectric properties in the microwave glycerol acetylation and gaseous emissions of blended biodiesel","authors":"Jonas Miguel Priebe, Eduardo G. R. Taques Filho, Evandro L. Dall’Oglio, Leonardo Gomes de Vasconcelos, Letícia Barbosa Ceron, Paulo T. de Sousa, Flávio Telles, Carlos Alberto Kuhnen","doi":"10.1007/s43153-023-00418-8","DOIUrl":"https://doi.org/10.1007/s43153-023-00418-8","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3>Microwave assisted glycerol acetylation reactions in a monomode pilot reactor were performed in order to obtain glycerol derivatives as potential biodiesel additives. The reactions were carried out with acetic acid and acetic anhydride using sulfuric acid, pyridine and triethylamine as catalysts. The acetylation reactions yielded a mixture of mono, di and triacetin respectively with short irradiation time and high selectivity to triacetin. Pyridine exhibits 100% of selectivity to triacetin in 30 min of microwave heating with 0.88% (w/wT) of catalyst concentration. Microwave-heating technology has been demonstrated as an alternative to reach a green chemistry and to this end becomes essential the knowledge of the dielectric properties of the materials involved in microwave heating in order to operate under optimal conditions. Dielectric properties of the pure reagents and during the glycerol acetylation under conventional heating were measured. High loss tangent were obtained for reactions mixtures employing H2SO4 and triethylamine and dielectric heating is dominated by ionic conductivity whereas with pyridine the dielectric heating of the reaction mixture is governed by dielectric relaxation process. Physical–chemical analysis of blended biodiesel with triacetin show values for viscosity, flash point, water content, density and acid number in accordance with current international standards. Gaseous emissions analyses of blended biodiesel showed significant reduction of CO emission (50%), CO2 (25%) and 30% reduction in unburned hydrocarbon (UBHC) and 50% of NOx emissions. The best values were observed in the samples containing 5 and 10% of triacetin.<h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>","PeriodicalId":9194,"journal":{"name":"Brazilian Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138513532","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}

引用次数: 0

Use of structured systems as a strategy to minimize the deactivation of Ni-based catalysts applied in dry reforming of methane 使用结构体系作为一种策略，以减少镍基催化剂在甲烷干重整中的失活

IF 1.2 4区工程技术

Brazilian Journal of Chemical Engineering Pub Date : 2023-11-21 DOI: 10.1007/s43153-023-00420-0

Ítalo R. S. de Araújo, André T. S. Ribeiro, I. C. F. Araújo, N. B. S. Araújo, Evelle D. C. Oliveira, Émerson F. M. da Silva, Oihane Sanz, Ramón R. P. Garcia, Deivson C. S. Sales, Luciano C. Almeida

{"title":"Use of structured systems as a strategy to minimize the deactivation of Ni-based catalysts applied in dry reforming of methane","authors":"Ítalo R. S. de Araújo, André T. S. Ribeiro, I. C. F. Araújo, N. B. S. Araújo, Evelle D. C. Oliveira, Émerson F. M. da Silva, Oihane Sanz, Ramón R. P. Garcia, Deivson C. S. Sales, Luciano C. Almeida","doi":"10.1007/s43153-023-00420-0","DOIUrl":"https://doi.org/10.1007/s43153-023-00420-0","url":null,"abstract":"In this work, the Ni/γ-Al2O3 (Ni/Al) and Ni/La2O3-γ-Al2O3 (Ni/La-Al) catalysts were synthesized using the all-in-one method and applied to dry methane reforming, with the aim of minimizing the effects of deactivation through the use of La and the application of monoliths. The characterization showed a smaller Ni crystallite size for the catalyst promoted by La, which was associated with better dispersion of its active phase. The monoliths showed a conversion rate around 15% higher than that of the powdered catalysts. By studying the deactivation of the monoliths and applying residual activity deactivation models (DMRA), it was possible to verify a fit with R2 greater than 0.90 and RMSE values below 5%, with the model predicted and adjusted to the residual activity region. In addition, the highest and lowest deactivation of the structured systems was identified for WHSV values of 40 and 20 L h−1 g−1cat, respectively. Finally, the regeneration of the catalysts with CO2 proved to be superior to that with H2, with a regeneration rate of 90% in the first two cycles.","PeriodicalId":9194,"journal":{"name":"Brazilian Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138513540","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}

引用次数: 0