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Gas–liquid upflow packed bed reactors: a comprehensive review focused on heat transport 气液上流式填料床反应器:以热传输为重点的综合评述
IF 4.7 3区 工程技术 Q1 ENGINEERING, CHEMICAL Pub Date : 2024-12-14 DOI: 10.1515/revce-2024-0035
María J. Taulamet, Osvaldo M. Martínez, Guillermo F. Barreto, Néstor J. Mariani
A review of the available information about the packed bed reactors with cocurrent upflow of gas and liquid (UFRs), particularly focused on heat transfer with an external medium through the container wall, was undertaken in this contribution. The typical use of such reactors is summarized as well as some novel applications. A brief discussion about fluid-dynamics is also made due to its strong effect on the transport processes. Experimental setup, available data, and literature correlations of heat transfer parameters are thoroughly reviewed. From a critical analysis of the experimental data, a refined database has been built, which allows comparing the performance of the existing correlations for the two parameters of the extensively employed two-dimensional pseudo-homogeneous plug flow model (i.e., effective radial thermal conductivity and wall heat transfer coefficient). In addition, new correlations for these parameters have been developed, which allow improving the actual predictive capabilities. Finally, the global heat transfer between the bed and the wall was comparatively analyzed for upflow (UFRs) and downflow (TBRs) gas–liquid packed bed reactors.
在这篇文章中,对有关气液共流填充床反应器(UFRs)的现有资料进行了回顾,特别着重于通过容器壁与外部介质的传热。总结了该类反应器的典型用途以及一些新的应用。由于流体力学对输运过程的强烈影响,本文还简要讨论了流体力学。实验设置,可用的数据和文献的传热参数的相关性进行了全面审查。通过对实验数据的关键分析,建立了一个精化的数据库,可以比较广泛使用的二维伪均匀塞流模型中两个参数(即有效径向导热系数和壁面传热系数)的现有相关性。此外,已经开发了这些参数的新相关性,从而提高了实际的预测能力。最后,对比分析了上流式(UFRs)和下流式(TBRs)气液填料床反应器床壁间的整体换热特性。
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引用次数: 0
A tutorial review of machine learning-based model predictive control methods 基于机器学习的模型预测控制方法教程综述
IF 4.7 3区 工程技术 Q1 ENGINEERING, CHEMICAL Pub Date : 2024-12-10 DOI: 10.1515/revce-2024-0055
Zhe Wu, Panagiotis D. Christofides, Wanlu Wu, Yujia Wang, Fahim Abdullah, Aisha Alnajdi, Yash Kadakia
This tutorial review provides a comprehensive overview of machine learning (ML)-based model predictive control (MPC) methods, covering both theoretical and practical aspects. It provides a theoretical analysis of closed-loop stability based on the generalization error of ML models and addresses practical challenges such as data scarcity, data quality, the curse of dimensionality, model uncertainty, computational efficiency, and safety from both modeling and control perspectives. The application of these methods is demonstrated using a nonlinear chemical process example, with open-source code available on GitHub. The paper concludes with a discussion on future research directions in ML-based MPC.
本教程综述提供了基于机器学习(ML)的模型预测控制(MPC)方法的全面概述,涵盖了理论和实践方面。它提供了基于ML模型泛化误差的闭环稳定性的理论分析,并从建模和控制的角度解决了数据稀缺性、数据质量、维数诅咒、模型不确定性、计算效率和安全性等实际挑战。这些方法的应用是用一个非线性化学过程的例子来演示的,在GitHub上有开源代码。最后,对基于ml的MPC的未来研究方向进行了展望。
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引用次数: 0
Research progress of jet washing technology and its exploratory decoking application in delayed coking process 射流洗涤技术的研究进展及其在延迟焦化过程中的探索性除焦应用
IF 4.7 3区 工程技术 Q1 ENGINEERING, CHEMICAL Pub Date : 2024-11-30 DOI: 10.1515/revce-2024-0030
Fuwei Lv, Bingjie Wang, Shijie Yan, Yong Zhu, Qifan Yu, Xiaoyong Yang
Considering the distinctive features of the delayed coking process and taking into account various particulate matter control technologies, the feasibility of using jet washing technology to remove coke powder from process gas is explored. The performance of scrubbers is heavily reliant on the quality of atomization, which in turn is influenced by liquid jet breakup. Due to the multiple interactions of various instabilities involved in jet breakup, as well as the short duration and small scale of this process, it is challenging to observe experimentally. Therefore, the specific fluid dynamics processes are not yet clear. In recent years, extensive research has been conducted on research methods, jet breakup modes, jet breakup characteristics, and jet breakup mechanisms. However, there is a lack of comprehensive review work summarizing these research advancements. This article aims to provide a comprehensive overview to facilitate jet scrubber designers’ systematic understanding of progress in jet breakup research. Furthermore, it discusses the significance of studying confined spaces for jet breakup with the objective of providing valuable insights for designing and optimizing delayed coker.
针对延迟焦化过程的特点,综合考虑多种颗粒物控制技术,探讨了采用射流洗涤技术去除工艺气中焦炭粉的可行性。洗涤器的性能在很大程度上取决于雾化质量,而雾化质量又受液体射流破碎的影响。由于射流破碎过程中各种不稳定性的多重相互作用,以及这一过程的持续时间短、规模小,实验观察具有挑战性。因此,具体的流体动力学过程尚不清楚。近年来,人们在研究方法、射流破碎模式、射流破碎特性、射流破碎机理等方面进行了广泛的研究。然而,目前还缺乏对这些研究进展进行全面总结的综述工作。本文旨在提供一个全面的概述,以方便射流洗涤器设计者系统地了解射流破碎的研究进展。讨论了研究密闭空间射流破碎的意义,为延迟焦化器的设计和优化提供了有价值的见解。
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引用次数: 0
Lithium–sulfur batteries beyond lithium-ion counterparts: reasonable substituting challenges, current research focus, binding critical role, and cathode designing 超越锂离子电池的锂硫电池:合理替代的挑战、当前的研究重点、结合的关键作用以及正极设计
IF 4.7 3区 工程技术 Q1 ENGINEERING, CHEMICAL Pub Date : 2024-09-02 DOI: 10.1515/revce-2023-0059
Farshad Boorboor Ajdari, Mahdi Niknam Shahrak, Mahshid Ershadi, Mehdi Shakourian-Fard, Fereshteh Abbasi, Ganesh Kamath, Faeze Akbari Beni, Fatemeh Ghasemi, Hamid Reza Ghenaatian, Seeram Ramakrishna
Despite concerns regarding safety, economics, and the environment, lithium-ion batteries (LIBs) are considerably utilized on account of their low energy density and capacity. Li–sulfur (Li–S) batteries have become a promising substitute for LIBs. Here, we first compared both systems in their cons and pros and analyzed the leading countries and companies in Li–S research are assessed through the utilization of an academic database. The scope of our research includes performance-enhancing design elements, cathode components, and binder materials. Synthetic and natural binders are trialed in an effort to enhance Li–S performance. Understanding the fundamental mechanisms enables the development of durable cathodes and binders. To overcome obstacles such as polysulfide adsorption, shuttle effect, and ion transport limitations, conducting polymers, metal/metal oxides, carbon-based compounds, MOFs, and Mxenes are investigated as potential cathode materials. In addition to pore characteristics and active polar sites, the efficacy of a battery is influenced by the anode surface geometry and heteroatom doping. Our review indicates that binders and sulfur/host composites must be meticulously chosen for Li–S battery cathode materials. This research advances energy storage technology by establishing the foundation for economically viable lithium–sulfur batteries with superior performance.
尽管锂离子电池(LIB)在安全性、经济性和环境方面备受关注,但由于其能量密度和容量较低,仍被大量使用。锂硫(Li-S)电池已成为锂离子电池的一种有前途的替代品。在此,我们首先比较了两种系统的优缺点,并通过学术数据库对锂硫电池研究领域的领先国家和公司进行了评估分析。我们的研究范围包括性能增强设计元素、阴极组件和粘合剂材料。我们试用了合成和天然粘合剂,以努力提高锂-S 性能。了解了基本机制,就能开发出耐用的阴极和粘结剂。为了克服多硫化物吸附、穿梭效应和离子传输限制等障碍,研究人员研究了导电聚合物、金属/金属氧化物、碳基化合物、MOFs 和二甲苯等潜在的阴极材料。除了孔隙特征和活性极性位点,电池的功效还受到阳极表面几何形状和杂原子掺杂的影响。我们的综述表明,锂-S 电池阴极材料必须精心选择粘合剂和硫/寄主复合材料。这项研究为性能优越、经济可行的锂硫电池奠定了基础,从而推动了储能技术的发展。
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引用次数: 0
A review of confined impinging jet reactor (CIJR) with a perspective of mRNA-LNP vaccine production 从 mRNA-LNP 疫苗生产的角度评述封闭式喷射反应器 (CIJR)
IF 4.7 3区 工程技术 Q1 ENGINEERING, CHEMICAL Pub Date : 2024-08-02 DOI: 10.1515/revce-2024-0016
Le Zhao, Zhiyun Xu, Hua Li, Lu Liu, Songying Chen, Zhengbiao Peng, Guichao Wang
In the spotlight of successful breakthrough of the COVID-19 mRNA vaccines, lipid nanoparticles are becoming an important vehicle to deliver a variety of therapeutics. The encapsulation of mRNA using lipids is a self-organizing process that necessitates fast mixing to achieve uniform supersaturation. This is achieved in a confined impinging jet reactor (CIJR) where two input jets collide and fast mix in the mixing chamber. While CIJR is not a new mixing technology, it stands out for its capability to achieve mixing times below a millisecond. This study presents a critical review of major studies concerning CIJRs, starting with the CIJRs’ structures and flow characterization, through experimental and numerical studies, and closing with successful applications in a wide range of chemical/pharmaceutical processes. The detailed mixing principles, scaling-up, and mechanisms of making nanoparticles are discussed focusing mainly on the hydrodynamic aspect. The objective of the review is to supply essential information for the optimized design and operation of CIJRs, catering to both industry and academia.
随着 COVID-19 mRNA 疫苗的成功突破,脂质纳米粒子正成为递送各种治疗药物的重要载体。利用脂质封装 mRNA 是一个自组织过程,需要快速混合以达到均匀的过饱和度。这可以在封闭式撞击射流反应器(CIJR)中实现,在该反应器中,两个输入射流在混合室中碰撞并快速混合。虽然 CIJR 并不是一种新的混合技术,但它能够实现低于毫秒的混合时间,因而脱颖而出。本研究对有关 CIJR 的主要研究进行了批判性回顾,从 CIJR 的结构和流动特征开始,到实验和数值研究,最后到在各种化学/制药过程中的成功应用。书中讨论了详细的混合原理、放大和纳米粒子的制造机制,主要侧重于流体力学方面。本综述旨在为 CIJR 的优化设计和运行提供基本信息,以满足工业界和学术界的需求。
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引用次数: 0
Metal nanoparticles loaded polyurethane nano-composites and their catalytic/antimicrobial applications: a critical review 负载金属纳米颗粒的聚氨酯纳米复合材料及其催化/抗菌应用:重要综述
IF 4.7 3区 工程技术 Q1 ENGINEERING, CHEMICAL Pub Date : 2024-07-25 DOI: 10.1515/revce-2024-0006
Khalida Naseem, Amina Qayyum, Awais Khalid, Maha S.I Wizrah, Madiha Khan, Asad Aziz, Zaid M. Aldhafeeri
Polyurethane (PU) belongs to a unique class of polymers. Different properties of PU such as mechanical strength and biocompatibility can be enhanced by co-polymerizing it with different bio and synthetic polymers. It finds huge applications as micro-reactors for the fabrication of metal nanoparticles (MNPs) owing to the synergistic properties of both polyurethane and fabricated metal nanoparticles. Metal nanoparticles fabricated polyurethane have gained much attention in the last few years. These types of nanocomposites hyphenate the mechanical properties of polyurethane with the high surface-to-volume ratio of metal nanoparticles. Here, this review article briefly evaluates different methods of synthesis of polyurethane-based metal nanocomposites and their characterization via different techniques to evaluate their properties. Applications of these polyurethane based nanocomposite materials have also been described critically in different fields depending upon their catalytic, antimicrobial and antifungal potential. Future directions of these nanocomposite materials have also been described in the field of designing of nano-filters and nano-devices in order to attain environmental remediation and sustainability.
聚氨酯(PU)属于一类独特的聚合物。聚氨酯的不同特性,如机械强度和生物相容性,可通过与不同的生物和合成聚合物共聚来增强。由于聚氨酯和制备的金属纳米粒子具有协同增效特性,因此聚氨酯作为制备金属纳米粒子(MNPs)的微反应器应用广泛。在过去几年中,金属纳米颗粒聚氨酯复合材料备受关注。这类纳米复合材料将聚氨酯的机械性能与金属纳米粒子的高表面体积比结合在一起。在此,这篇综述文章简要评估了聚氨酯基金属纳米复合材料的不同合成方法,以及通过不同技术评估其特性的表征方法。文章还根据这些聚氨酯基纳米复合材料的催化、抗菌和抗真菌潜力,对其在不同领域的应用进行了批判性描述。此外,还介绍了这些纳米复合材料在纳米过滤器和纳米设备设计领域的未来发展方向,以实现环境修复和可持续发展。
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引用次数: 0
Analysis of the state of the art technologies for the utilization and processing of associated petroleum gas into valuable chemical products 分析利用伴生石油气并将其加工成有价值化工产品的最新技术
IF 4.7 3区 工程技术 Q1 ENGINEERING, CHEMICAL Pub Date : 2024-05-07 DOI: 10.1515/revce-2023-0068
Sergey I. Uskov, Dmitriy I. Potemkin, Artem S. Urlukov, Pavel V. Snytnikov
The problems concerning the insufficient level of associated petroleum gas (APG) processing are discussed. Various models are proposed for the chemical utilization of APG, including the production of synthesis gas, methanol, dimethyl ether, ammonia, as well as the processes of aromatization of hydrocarbons, etc. The possibility of using APG as a fuel for generating electricity is discussed. Attention is paid to the processes of APG purification from sulfur impurities. Difficulties and solutions to the problems of the energy sector of APG utilization are discussed.
讨论了伴生石油气(APG)加工水平不足的问题。为伴生石油气的化学利用提出了各种模式,包括合成气、甲醇、二甲醚、氨的生产,以及碳氢化合物的芳香化过程等。还讨论了将 APG 用作发电燃料的可能性。还关注了从硫杂质中提纯 APG 的过程。讨论了在能源领域使用 APG 的困难和解决方案。
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引用次数: 0
A decade development of lipase catalysed synthesis of acylglycerols using reactors: a systematic review 利用反应器在脂肪酶催化下合成酰基甘油的十年发展:系统综述
IF 4.7 3区 工程技术 Q1 ENGINEERING, CHEMICAL Pub Date : 2024-04-20 DOI: 10.1515/revce-2023-0050
Nurul Nadiah Abd Razak, Patrick Cognet, Yolande Pérès, Mohamed Kheireddine Aroua, Lai Ti Gew
Glycerol esterification produces a variety of valuable chemicals and has been a subject of great interest in recent years. Lipase-catalysed synthesis of acylglycerols reactions have many potential applications, including in the production of structured lipids, biofuels and pharmaceuticals. It offers several benefits over traditional chemical methods, including higher selectivity, milder reaction conditions and increased sustainability. In this systematic review, we summarize 52 primary research of lipase catalysed synthesis of acylglycerol published from 2012 to 2022. Different types of reactions employed in the synthesis of acylglycerols using various lipases are thoroughly discussed. The use of lipase in as biocatalyst in the synthesis of acylglycerols is safe for consumption and sustainable as it can reduce the utilization of toxic and hazardous organic solvents and chemicals that cause harm to human health and the environment. This review serves as a reference for the research and development of acylglycerols using biocatalysts and reactors. It could be an interest to the food and pharmaceutical industries or individuals who are interested to explore this field. Several limitations associated with the overall research on production of acylglycerols are presented in the conclusion section.
甘油酯化反应可产生多种有价值的化学物质,近年来一直是备受关注的课题。脂肪酶催化的酰基甘油合成反应有许多潜在应用,包括生产结构脂、生物燃料和药物。与传统化学方法相比,脂肪酶催化合成反应具有多种优势,包括更高的选择性、更温和的反应条件和更强的可持续性。在这篇系统综述中,我们总结了 2012 年至 2022 年间发表的 52 篇有关脂肪酶催化合成酰基甘油的主要研究成果。我们深入讨论了使用各种脂肪酶合成酰基甘油的不同反应类型。使用脂肪酶作为合成酰基甘油的生物催化剂,可以减少使用对人类健康和环境造成危害的有毒有害有机溶剂和化学品,因此食用安全且可持续。本综述为利用生物催化剂和反应器研究和开发酰基甘油提供了参考。食品和制药行业或有兴趣探索这一领域的个人可能会对此感兴趣。结论部分介绍了与酰基甘油生产的整体研究相关的几个局限性。
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引用次数: 0
Experimental research of paraffin deposition with flow loops 利用流动回路进行石蜡沉积实验研究
IF 4.7 3区 工程技术 Q1 ENGINEERING, CHEMICAL Pub Date : 2024-04-03 DOI: 10.1515/revce-2023-0041
Chang Hong Gao
Wax/paraffin deposition in production wells and oil pipelines is a major challenge for oil production. Extensive research has been conducted to improve understanding of this process. This paper presents a review of experimental work carried out with flow loops. Previous research investigated paraffin deposition process under the influences of temperature, flow rate/velocity, shear stress, water fraction, gas phase, pipe material, asphaltene concentration, and chemical inhibitors. Test results reveal that temperature and shear stress have significant impacts on wax deposition. Limited research has been conducted on wax deposition under multiphase flow. Even though more than 20 years of efforts have been spent on wax deposition studies, unfortunately we have not fully understood this phenomenon.
生产井和石油管道中的蜡/石蜡沉积是石油生产的一大挑战。为了加深对这一过程的理解,人们进行了广泛的研究。本文回顾了利用流动回路开展的实验工作。以往的研究调查了温度、流速/速度、剪切应力、水分量、气相、管道材料、沥青质浓度和化学抑制剂影响下的石蜡沉积过程。测试结果表明,温度和剪切应力对蜡沉积有显著影响。有关多相流下蜡沉积的研究十分有限。尽管我们已在蜡沉积研究方面花费了 20 多年的时间,但遗憾的是,我们尚未完全了解这一现象。
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引用次数: 0
A critical overview on impact of different nano-catalytic assemblies for photodegradation of tetracycline 不同纳米催化组件对四环素光降解的影响综述
IF 4.7 3区 工程技术 Q1 ENGINEERING, CHEMICAL Pub Date : 2024-04-03 DOI: 10.1515/revce-2023-0029
Rida Khalid, Muhammad Imran Din, Zaib Hussain
Recently, the removal of tetracycline, a toxic material, from aquatic medium has been a trending subject of research. Several different technologies including adsorption, biological removal method, solvent extraction, coagulation, chemical reduction, photocatalysis and ion exchange method for removal of tetracyclines from wastewater have been reported. However, photocatalysis of tetracyclines (TC) has gained huge interest because of more efficient mineralization of TC into CO2 and water. Several different nanomaterial based photocatalytic assemblies for the removal of tetracyclines have been widely reported for the removal of tetracyclines which have not been critically reviewed in the literature. This study provides an overview of recent progress of classification, synthesis, characterizations, mechanism of inorganic and metal organic framework nanocatalytic assemblies on photocatalysis of tetracyclines in aquatic medium. Additionally, kinetics and factors affecting the photocatalysis of tetracyclines have been discussed briefly. Future perspectives have also been presented for further advancement in this area.
近来,从水生介质中去除有毒物质四环素已成为一个热门研究课题。目前已经报道了几种不同的去除废水中四环素的技术,包括吸附法、生物去除法、溶剂萃取法、混凝法、化学还原法、光催化法和离子交换法。然而,四环素(TC)的光催化技术因能更有效地将四环素矿化为二氧化碳和水而受到广泛关注。在去除四环素方面,已有多种不同的基于纳米材料的光催化组件被广泛报道,但尚未有文献对其进行批判性评述。本研究概述了无机和金属有机框架纳米催化组装体在水生介质中光催化四环素的分类、合成、表征、机理等方面的最新进展。此外,还简要讨论了光催化四环素的动力学和影响因素。此外,还提出了进一步推动该领域研究的未来展望。
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引用次数: 0
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Reviews in Chemical Engineering
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