Chemical Engineering Research & Design最新文献_第6页

Novel process design for eco-efficient production of green formic acid from CO2 利用二氧化碳生产绿色甲酸的新型生态高效工艺设计

IF 3.7 3区工程技术

Chemical Engineering Research & Design Pub Date : 2024-09-06 DOI: 10.1016/j.cherd.2024.09.001

{"title":"Novel process design for eco-efficient production of green formic acid from CO2","authors":"","doi":"10.1016/j.cherd.2024.09.001","DOIUrl":"10.1016/j.cherd.2024.09.001","url":null,"abstract":"<div><p>The valorisation of green hydrogen and captured CO<sub>2</sub> to produce chemicals or energy carriers holds immense potential to reduce GHG emissions. Among them, formic acid (FA) is an essential chemical with diverse applications and a growing market demand. Furthermore, due to liquidity at ambient conditions and its chemical stability, it is a promising hydrogen carrier. However, its direct thermochemical synthesis from CO<sub>2</sub> hydrogenation still faces significant challenges due to a high thermodynamic barrier. This study presents a novel and eco-efficient process design for a 50 kta FA production from CO<sub>2</sub> and green H<sub>2</sub>. Initially, CO<sub>2</sub> is converted to CO as an intermediate compound that undergoes a carbonylation reaction with methanol to form methyl formate, which is then hydrolysed into FA. The major challenges of this new proposed process lie in the purification of CO and the energy-intensive downstream separation of FA. The former is addressed by using the COPure™ technology, which combines chemical and physical absorption, while the latter requires the use of process intensification techniques to minimize the energy and capital expenses. The newly designed process achieves high molar yields of 95 % for CO<sub>2</sub> and 96 % for H<sub>2</sub> with a specific energy intensity of 21.8 MJ/kg of FA. Notably, the CO<sub>2</sub> emissions can be reduced by almost half as compared to the existing FA synthesis from fossil fuels, coupled with a 64 % reduction in electricity usage and 20 % decrease in steam requirements.</p></div>","PeriodicalId":10019,"journal":{"name":"Chemical Engineering Research & Design","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0263876224005306/pdfft?md5=d0812de48a666b54032f92c2ef406b5a&pid=1-s2.0-S0263876224005306-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142230387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Plasticization of a stiff pharmaceutical solid for better tabletability via cocrystallization: Shape synthons as supramolecular protecting groups 通过共结晶对硬质药物固体进行塑化，以获得更好的片剂性：作为超分子保护基团的形状合成物

IF 3.7 3区工程技术

Chemical Engineering Research & Design Pub Date : 2024-09-06 DOI: 10.1016/j.cherd.2024.08.042

引用次数: 0

Double tube configuration of atmospheric pressure plasma jet for deposition of organic coatings in open air 用于在露天沉积有机涂层的常压等离子射流双管配置

IF 3.7 3区工程技术

Chemical Engineering Research & Design Pub Date : 2024-09-05 DOI: 10.1016/j.cherd.2024.09.006

{"title":"Double tube configuration of atmospheric pressure plasma jet for deposition of organic coatings in open air","authors":"","doi":"10.1016/j.cherd.2024.09.006","DOIUrl":"10.1016/j.cherd.2024.09.006","url":null,"abstract":"<div><p>A double coaxial tube configuration of atmospheric pressure plasma jet (APPJ) was compared with a single tube one for open air plasma polymerization. The effectiveness on minimizing the influence of ambient air during the deposition process was shown for a double tube APPJ i.e. Ar gas fed into the outer glass tube acted as a shielding gas. The inner tube, acted as the powered electrode was fed with a mixture of Ar gas with the precursor, i.e., toluene vapor, a non-oxygen containing precursor. The dynamics of gas flow and its dependence on composition was investigated with a Schlieren imaging system. Coatings obtained with both configurations were analyzed by fourier transform infra-red (FTIR) and x-ray photoelectron spectroscopy (XPS). The results show clearly that the argon shielding gas largely protects the diffusion of oxygen in the deposition zone, giving rise to polymers with much less oxygen incorporated in their structure, and a good retention of the aromatic rings of toluene. Furthermore, the area of the treated zone and the chemical composition of the coating deposited is highly localized (1 mm) in the double tube giving dense stable carbon films while the deposition in the single tube much bigger (6 mm), and the deposited coatings are unstable and easily washed away. Hence, the results obtained with this innovative system provide a new path in plasma polymerization and continuous treatments of large surfaces, with improved coating stability and chemical retention.</p></div>","PeriodicalId":10019,"journal":{"name":"Chemical Engineering Research & Design","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142239189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Entropy generation analysis for printed circuit heat exchanger used in small-scale nitrogen expansion natural gas liquefaction refineries: Numerical approach 用于小型氮膨胀天然气液化炼油厂的印刷电路热交换器的熵生成分析：数值方法

IF 3.7 3区工程技术

Chemical Engineering Research & Design Pub Date : 2024-09-05 DOI: 10.1016/j.cherd.2024.09.005

{"title":"Entropy generation analysis for printed circuit heat exchanger used in small-scale nitrogen expansion natural gas liquefaction refineries: Numerical approach","authors":"","doi":"10.1016/j.cherd.2024.09.005","DOIUrl":"10.1016/j.cherd.2024.09.005","url":null,"abstract":"<div><p>Natural gas liquefaction assisted by the nitrogen expansion process is a growing option for small-scale refineries. The liquefaction process is an energy-intensive process, so choosing a cost-effective main heat exchanger is vital. With the ever-increasing expansion of small-scale liquefaction refineries, printed circuit heat exchangers (PCHEs) are promising candidates with great efficiency due to their small dimensions and high pressure and temperature difference tolerance. In this study, to reduce the LNG temperature, curved channels with fillet corners have been replaced by straight channels. The effects of operation pressure, inclined angle (α), and pitch number (N) on thermohydraulic performance and entropy generation in methane and nitrogen channels were studied. With an increasing inclined angle, a 24.11 % reduction in total entropy generation in the methane channel and a 10.27 % decrease in the nitrogen channel occur at α=45<sup>°</sup>and N=10. The closeness of Bijan number to 1 in the methane channel reveals the greater contribution of entropy generation due to heat transfer. For curvy channels, the performance evaluation criterion is greater than 1, which indicates that the structural change of the channel can reduce the negative effects of pressure drop. This research can make suitable steps for optimizing PCHEs in the natural gas liquefaction industry.</p></div>","PeriodicalId":10019,"journal":{"name":"Chemical Engineering Research & Design","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142172483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Potentiality of eggshell waste in synthesis of functional metal-organic frameworks for fuel purification 蛋壳废料在合成用于燃料净化的功能性金属有机框架方面的潜力

IF 3.7 3区工程技术

Chemical Engineering Research & Design Pub Date : 2024-09-05 DOI: 10.1016/j.cherd.2024.09.008

{"title":"Potentiality of eggshell waste in synthesis of functional metal-organic frameworks for fuel purification","authors":"","doi":"10.1016/j.cherd.2024.09.008","DOIUrl":"10.1016/j.cherd.2024.09.008","url":null,"abstract":"<div><p>Nitrogen containing compounds in the liquid fuel are well-known to cause serious corrosive action on the engines and plugging of filters with the formation of gummy compounds. Hence, the removal of nitrogenated compounds from the liquid fuel is highly demanded. The current study focused on the efficient removal of indole and quinoline (as nitrogenated compounds) by Ca based metal organic framework. Formerly, Ca based metal organic framework was synthesized using eggshell wastes as source of Ca by Solvothermal [Ca-BTC (s)] and Microwave [Ca-BTC (m)] techniques. Flower and shell plates like crystals were observed under microscope for the synthesized Ca-BTC (s) and Ca-BTC (m), respectively. Purification of liquid fuel from indole and quinoline by the obtained Ca-BTC was systematically investigated. The adsorption of nitrogenated compounds followed the second order reaction and Langmuir isotherm. Microwave technique showed to be more preferable rather than solvothermal technique, for preparation of Ca-BTC with significantly higher adsorption capacity, whereas, and the affinity was higher towards quinoline compared to indole. Meanwhile, for Ca-BTC (m), the estimated maximum adsorption capacity of indole and quinoline was 490.7 mg/g and 583.4 mg/g, respectively. After 4 regeneration cycles, the adsorption capacity Ca-BTC (m) was lowered by 29 % for indole and 24 % for quinoline. The obtained results confirmed the successful using of eggshell wastes in preparation of Ca-BTC with remarkable efficiency in the liquid fuel purification with quite good recyclability.</p></div>","PeriodicalId":10019,"journal":{"name":"Chemical Engineering Research & Design","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0263876224005379/pdfft?md5=7cc77c1814dd78418d2be352752c6496&pid=1-s2.0-S0263876224005379-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142164958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Non-catalytic heterogeneous combustion and gasification reactions modeling for a single char pellet 单个炭粒的非催化异相燃烧和气化反应建模

IF 3.7 3区工程技术

Chemical Engineering Research & Design Pub Date : 2024-09-05 DOI: 10.1016/j.cherd.2024.09.009

引用次数: 0

Influences of nanobubbles on particle–particle and bubble–particle interactions: A review 纳米气泡对粒子-粒子和气泡-粒子相互作用的影响：综述

IF 3.7 3区工程技术

Chemical Engineering Research & Design Pub Date : 2024-09-03 DOI: 10.1016/j.cherd.2024.08.041

{"title":"Influences of nanobubbles on particle–particle and bubble–particle interactions: A review","authors":"","doi":"10.1016/j.cherd.2024.08.041","DOIUrl":"10.1016/j.cherd.2024.08.041","url":null,"abstract":"<div><p>The investigation of the interactions between particles resulting from long-range hydrophobic forces has been thoroughly studied in the literature. The hydrophobic force is most likely a result of capillary forces that may occur when nanobubbles merge and create capillary bridges. Recent studies show that fine particle collection can be enhanced by introducing nanobubbles, which seems to be a positive indication of the existence of such capillary bridges. There has been a significant interest in nanobubble research in the past two decades due to their excellent stability and multitude of applications. Although this is an interesting research area, there is still a great debate about the extraordinary stability of nanobubbles. Arguably, much less is known about the underlying mechanisms responsible for their role in bubble–particle and particle–particle interactions that can potentially augment a wide range of separation processes. In this review article, we aim to examine the underlying mechanisms of nanobubble interactions with particles and bubbles that can be conveniently utilized to explain the improved particle separation efficacy. This article also discusses the current understanding of the origin of nanobubbles, including their characterization methods, existing debates, and possible reconciliation of different theories. Finally, the review discusses areas that require further research to clarify some existing issues and provides a direction where further research in the area should be headed.</p></div>","PeriodicalId":10019,"journal":{"name":"Chemical Engineering Research & Design","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142152028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Construction of Z-scheme Fe3O4/BiOBr/BiOI heterojunction with magnetically recyclable for enhanced photocatalytic reaction activity 构建磁性可回收的 Z 型 Fe3O4/BiOBr/BiOI 异质结，提高光催化反应活性

IF 3.7 3区工程技术

Chemical Engineering Research & Design Pub Date : 2024-09-03 DOI: 10.1016/j.cherd.2024.08.043

{"title":"Construction of Z-scheme Fe3O4/BiOBr/BiOI heterojunction with magnetically recyclable for enhanced photocatalytic reaction activity","authors":"","doi":"10.1016/j.cherd.2024.08.043","DOIUrl":"10.1016/j.cherd.2024.08.043","url":null,"abstract":"<div><p>The Z-scheme Fe<sub>3</sub>O<sub>4</sub>/BiOBr/BiOI heterojunction with magnetic recyclability was developed by a simple solvothermal approach, effectively targeting and degrading tetracycline pollutants in water that were difficult for the environment to naturally break down. The meticulously produced samples were thoroughly examined for their morphology, structural integrity, microscopic composition, chemical properties, and magnetic characteristics using a variety of analytical techniques. The tripartite Fe<sub>3</sub>O<sub>4</sub>/BiOBr/BiOI ensemble demonstrated exceptional photocatalytic degradation ability (87 %) towards tetracycline (TC) when guided by simulated sunlight, significantly outperforming the capabilities of pure BiOBr and BiOI. Radical trapping tests revealed that superoxide radicals (·O<sub>2</sub><sup>-</sup>) and holes (h<sup>+</sup>) were the main components responsible for photodegradation. Fe<sub>3</sub>O<sub>4</sub>/BiOBr/BiOI showed increased photocatalytic efficiency, mainly because of the Z-scheme heterojunction creation that allowed for the effective separation of charge carriers generated by photosynthesis. Moreover, Fe<sub>3</sub>O<sub>4</sub>/BiOBr/BiOI showed remarkable stability and recyclable properties while maintaining high photocatalytic activity. The successful creation of Z-scheme heterojunction photocatalysts with magnetic recycling for the breakdown of pollutants was predicted to be made possible by this work.</p></div>","PeriodicalId":10019,"journal":{"name":"Chemical Engineering Research & Design","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142169521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

A framework for model maintenance using kernel-based forward propagating neural networks 使用基于核的前向传播神经网络的模型维护框架

IF 3.7 3区工程技术

Chemical Engineering Research & Design Pub Date : 2024-09-03 DOI: 10.1016/j.cherd.2024.09.002

{"title":"A framework for model maintenance using kernel-based forward propagating neural networks","authors":"","doi":"10.1016/j.cherd.2024.09.002","DOIUrl":"10.1016/j.cherd.2024.09.002","url":null,"abstract":"<div><p>Deep learning models possess limited flexibility in computational burden in model adaptation owing to the conventional use of backpropagation for model training. To address this problem, we propose an alternate training methodology inspired by the forward–forward algorithm originally designed for classification tasks. We extend this concept through a kernel-based modification, enabling its application to regression tasks, which are commonly encountered in process system modeling. Our proposed Kernel-based Forward Propagating Neural Network (K-FP-NN) eliminates backpropagation, using layer-wise updates for better adaptability. We introduce a real-time (RT) updating framework, RT-K-FP-NN, to continuously refine model parameters with new data. Results indicate that when applied to model predictive control of a continuous stirred tank reactor (CSTR) system, our approach updates the model within 100 s, achieving better performance metrics compared to backpropagation-based real-time models, which require 326 s. This framework can be applied to various dynamic systems, enhancing real-time decision-making by improving predictive accuracy and system adaptability.</p></div>","PeriodicalId":10019,"journal":{"name":"Chemical Engineering Research & Design","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142164957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Adsorption mechanism of adsorbents for mercaptan foul-smelling substances: A review 硫醇恶臭物质吸附剂的吸附机理：综述

IF 3.7 3区工程技术

Chemical Engineering Research & Design Pub Date : 2024-08-31 DOI: 10.1016/j.cherd.2024.08.037

{"title":"Adsorption mechanism of adsorbents for mercaptan foul-smelling substances: A review","authors":"","doi":"10.1016/j.cherd.2024.08.037","DOIUrl":"10.1016/j.cherd.2024.08.037","url":null,"abstract":"<div><p>As an environmental pollutant with low olfactory threshold, mercaptan foul-smelling substances have caused great harm to human production and life. Among the existing mercaptan treatment technologies, adsorption method has been widely studied and applied because of the advantages of high efficiency and renewable adsorbents. In this paper, the adsorption mechanisms of mercaptan on zeolite molecular sieves, carbon-based materials, metal-organic frameworks and metal oxides are reviewed, and it is concluded that the main mechanisms for their adsorption of mercaptan are micropore filling and chemical bonding, but some of the adsorbents also have mechanisms such as sieve effects, free radical reactions and π-π interactions. It is also pointed out that the green and low-cost modification of zeolite molecular sieves and the maintenance of the structural stability of metal-organic frameworks are the bottlenecks that need to be solved for the future development of efficient adsorption of thiols materials, and the development of composite materials of nanocarbon and metal oxides is the trend for the future development of high-efficiency adsorbents. The aim of this paper is to provide a theoretical reference for the in-depth study of the mechanism of mercaptan adsorption and the construction of new efficient mercaptan adsorbents.</p></div>","PeriodicalId":10019,"journal":{"name":"Chemical Engineering Research & Design","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142136335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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