Hui Liu , Shuzhong Wang , Risheng Zhuo , Wenjin Zhang , Yuanwang Duan , Xuetao Deng , Junan Zhao , Jianqiao Yang , Lu Liu , Yanhui Li , Jie Zhang
{"title":"Design of China first pilot plant for supercritical hydrothermal synthesis of AgNPs","authors":"Hui Liu , Shuzhong Wang , Risheng Zhuo , Wenjin Zhang , Yuanwang Duan , Xuetao Deng , Junan Zhao , Jianqiao Yang , Lu Liu , Yanhui Li , Jie Zhang","doi":"10.1016/j.cherd.2024.11.037","DOIUrl":"10.1016/j.cherd.2024.11.037","url":null,"abstract":"<div><div>Supercritical hydrothermal synthesis (SCHS) is an eco-friendly and efficient method for synthesizing nanomaterials. China's first pilot plant for SCHS of silver nanoparticles (AgNPs) has been successfully built, producing AgNPs with controllable particle sizes through reactor and system optimizations. This manuscript systematically explores the challenges of low heating and mixing efficiency and clogging, and proposes targeted solutions, including efficient warming, heat reuse and mixer structure optimisation. The detailed system components, evident properties, advanced control methods and primary experiment results of the pilot scale plant are described objectively, achieving high-purity AgNPs with an average particle size of 36.1 nm. These findings will contribute to the commercialisation of the SCHS pilot plant for continuous batch production of nanoparticles.</div></div>","PeriodicalId":10019,"journal":{"name":"Chemical Engineering Research & Design","volume":"212 ","pages":"Pages 569-577"},"PeriodicalIF":3.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142747572","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}
Thao Xuan Thanh Le , Manh Tuan Duong , Long Duc Huynh , Thom Thi Dang , Manh Van Do , Duong Bach Nguyen , Tuan Minh Pham
{"title":"A high performance of thin film composite based on dextran substrate for effective removal of heavy metal ions","authors":"Thao Xuan Thanh Le , Manh Tuan Duong , Long Duc Huynh , Thom Thi Dang , Manh Van Do , Duong Bach Nguyen , Tuan Minh Pham","doi":"10.1016/j.cherd.2024.11.036","DOIUrl":"10.1016/j.cherd.2024.11.036","url":null,"abstract":"<div><div>A high performance thin film composite forward osmosis (FO) membrane with dextran as additive in support layer has been developed for effective heavy metal ions removal for the first time. The proposed FO process consists of a thin film composite (TFC) FO membrane made from interfacial polymerization on a high porous and hydrophillic polysulfone embedded dextran support to minimize the internal concentration polarization effect. The created substrates were characterized in terms of surface chemistry and morphology prior to performance evaluation. The support layer incorporating with dextran exhibited lower contact angle and high porosity as an ideal support layer for FO process. Moreover, the ridge-and-valley structure of TFC membranes made with support layers containing larger openings, long finger-like voids and macrovoids was more noticeable for the active layers, according to high-resolution scanning electron microscopy. The removal of metals were demonstrated, water fluxes were around 13 L/m<sup>2</sup>.h and rejection were above 95 %. The performance of developed membrane was then showed greater water flux and rejection in comparison to the commercial TFC.</div></div>","PeriodicalId":10019,"journal":{"name":"Chemical Engineering Research & Design","volume":"212 ","pages":"Pages 547-554"},"PeriodicalIF":3.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142747573","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}
Dalma S. Argüello , Isabel Barroso-Martín , Nancy F. Bálsamo , Enrique Rodríguez-Castellón , Griselda A. Eimer , Mónica E. Crivello
{"title":"Cu-Ni synergy in physicochemical properties of the Mg-Al oxides matrix to selective glycerol carbonate production","authors":"Dalma S. Argüello , Isabel Barroso-Martín , Nancy F. Bálsamo , Enrique Rodríguez-Castellón , Griselda A. Eimer , Mónica E. Crivello","doi":"10.1016/j.cherd.2024.11.024","DOIUrl":"10.1016/j.cherd.2024.11.024","url":null,"abstract":"<div><div>Cu-Ni modified Mg-Al-layered double hydroxides were synthesized by coprecipitation and calcined to generate ternary and quaternary mixed metal oxides (MMOs). The materials were physicochemically characterized. Cu-Ni-enhanced MMOs are novel as heterogeneous catalysts in the transesterification reaction between glycerol and an alkyl carbonate to synthesize a platform molecule, glycerol carbonate (GC). This reaction valorizes glycerol, a byproduct in the biodiesel industry. The physicochemical properties and catalytic activities of MMOs were investigated. The quaternary MMO with the lowest Cu-Ni loading (15 at%) showed the best GC yield (84.6 %) under mild reaction conditions. Very-strong basic sites (BS<sub>VS</sub>) density was directly proportional to the copper content. The densities of strong basic sites (BS<sub>S</sub>) and BS<sub>VS</sub> were correlated with glycerol conversion. The high catalytic activity to GC was attributed to adequate surface morphology and a compromise between the amounts of BS<sub>S</sub> and BS<sub>VS</sub>. The amount of BS<sub>VS</sub> should be low enough so that the selectivity to GC does not decrease. The stability of the MMO with the best catalytic behavior was investigated.</div></div>","PeriodicalId":10019,"journal":{"name":"Chemical Engineering Research & Design","volume":"212 ","pages":"Pages 555-568"},"PeriodicalIF":3.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142747571","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}
{"title":"Accelerating catalytic experimentation of water gas shift reaction using machine learning models","authors":"Sathish Kumar C, Koustuv Ray","doi":"10.1016/j.cherd.2024.11.033","DOIUrl":"10.1016/j.cherd.2024.11.033","url":null,"abstract":"<div><div>Catalyst is an essential component of any reaction pathway, and in former times, “trial and error” approaches were used to identify viable candidates for a chosen reaction. Our study is built on the use of machine learning (ML) model, to reduce the time and cost involved in the catalyst screening process. Here we focussed on a probe reaction i.e. Water Gas Shift Reaction (WGSR) to test the developed model and subsequently predict suitable catalysts. Firstly, available experimental data from the literature were collected and represented using the Sorted Weighted Elemental Descriptor (SWED) and conventional techniques. A standard ML algorithm was used to develop the model, and after a 10-fold validation and RMSE evaluation, the best model was used to predict the new potential candidates for the chosen reaction. The pattern has been explored by embarking on feature importance studies, and finally, to augment with practicality, a user interface is created.</div></div>","PeriodicalId":10019,"journal":{"name":"Chemical Engineering Research & Design","volume":"212 ","pages":"Pages 472-484"},"PeriodicalIF":3.7,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706404","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}
Yongkun Qi , Haifeng Lu , Hui Du , Xiaolei Guo , Haifeng Liu
{"title":"Effect of resistance components on solid mass flow rate of the pneumatic conveying system","authors":"Yongkun Qi , Haifeng Lu , Hui Du , Xiaolei Guo , Haifeng Liu","doi":"10.1016/j.cherd.2024.11.021","DOIUrl":"10.1016/j.cherd.2024.11.021","url":null,"abstract":"<div><div>In pneumatic conveying systems, a stable and controlled solid mass flow rate is essential for industrial plant design. This study examined the influence of resistance component sizes and shapes on dense-phase pneumatic conveying, which demonstrated that structural variations significantly alter system pressure distribution and the solid mass flow rate. Notably, the analysis showed that the ratio of the orifice plate pressure drop to the total conveying pressure drop is related to the resistance component structure. Consequently, the solid mass flow rate can be controlled by adjusting the structure of the resistance components. Moreover, the structure characteristics of the resistance components are engineered to enhance gas velocity within the pipeline, thereby effectively mitigating the risk of clogging. The relationship between the ratio of the orifice plate pressure drop to the total conveying pressure drop and the solid mass flow rate was established by introducing the concept of effective pressure drop. Based on this relationship and Beverloo law, a model for solid mass flow rate was developed, which can predict the solid mass flow rate well by providing errors mostly within ± 10 %. This study offers a valuable reference for the optimizing of resistance components design in pneumatic conveying systems.</div></div>","PeriodicalId":10019,"journal":{"name":"Chemical Engineering Research & Design","volume":"212 ","pages":"Pages 536-545"},"PeriodicalIF":3.7,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723054","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}
Xiaodong Cui , Dominic Peters , Yifei Wang , Berkay Çıtmacı , Derek Richard , Carlos G. Morales-Guio , Panagiotis D. Christofides
{"title":"Modeling and control of a protonic membrane steam methane reformer","authors":"Xiaodong Cui , Dominic Peters , Yifei Wang , Berkay Çıtmacı , Derek Richard , Carlos G. Morales-Guio , Panagiotis D. Christofides","doi":"10.1016/j.cherd.2024.11.006","DOIUrl":"10.1016/j.cherd.2024.11.006","url":null,"abstract":"<div><div>Steam methane reforming in solid oxide proton conducting membranes is a state-of-the-art process capable of initiating methane reforming reactions, electrochemical hydrogen separation, and the compression of purified hydrogen product within a single electrochemical processing unit. Given the many process variables involved, a model predictive controller is needed to safely operate a protonic membrane reformer (PMR) under dynamic operational conditions by employing physically relevant constraints that protect the reactor materials of construction and maximize the stability of the process. This work derives, and experimentally validates, physics-based models for a PMR process and integrates an overall process model into centralized and decentralized model predictive control schemes. The performance of control actions from classical proportional–integral controllers and model predictive controllers are surveyed, and the decentralized model predictive control algorithm, developed here, obeys practical constraints, reaches the target variables’ setpoints quickly, and lowers computational costs relative to the centralized predictive controller. Finally, the addition of a disturbance observer (DOB) ensures robust controller performance when subject to incomplete and infrequent process measurements or common system disturbances.</div></div>","PeriodicalId":10019,"journal":{"name":"Chemical Engineering Research & Design","volume":"212 ","pages":"Pages 493-519"},"PeriodicalIF":3.7,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723080","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}
{"title":"Improvement of bubble distribution characteristics through multi-objective optimization of flow characteristics of a swirling flow type microbubble generator with fixed blades","authors":"Yasuyuki Nishi , Hiroyuki Kogawa , Yuta Utsumi , Masatoshi Futakawa","doi":"10.1016/j.cherd.2024.11.022","DOIUrl":"10.1016/j.cherd.2024.11.022","url":null,"abstract":"<div><div>Swirling flow type microbubble generators with fixed blades (hereafter referred to as \"bubblers\") can be easily downsized and upsized and can be easily integrated into existing facilities. For this reason, bubblers have been used for mercury targets; however, there is a need to improve the bubble distribution characteristics. The objective of this study is to establish a technique to rapidly improve bubble distribution characteristics through multi-objective optimization of the flow characteristics of this bubbler using single-phase flow computational fluid dynamics (CFD) analysis. Therefore, design variables for the bubbler blades were defined by applying turbomachinery design methods, and four flow characteristics were subjected to multi-objective optimization using single-phase flow CFD analysis and the response surface methods. While the resulting optimized bubbler increased the pressure loss coefficient by 0.9 %, it improved the wall shear stress by 3.4 %, the swirl number by 10.0 %, and the pressure reduction coefficient by 14.3 % compared to the original bubbler. Furthermore, experiments showed that the optimized bubbler produced smaller bubbles than the original bubbler, demonstrating that the multi-objective optimization design method can significantly improve the bubble distribution characteristics while maintaining the same pressure loss coefficient.</div></div>","PeriodicalId":10019,"journal":{"name":"Chemical Engineering Research & Design","volume":"212 ","pages":"Pages 457-471"},"PeriodicalIF":3.7,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706406","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}
{"title":"The heat transfer characteristics of semi-molten wide sieving dilute phase particles between vertical heating surfaces","authors":"Zhiyong Bai, Yuan Ma, Shuzhong Wang, Chengcheng Yang, Fangshuo Shi, Ruibin Xue, Qingyuan Wang, Jun Zhao","doi":"10.1016/j.cherd.2024.11.025","DOIUrl":"10.1016/j.cherd.2024.11.025","url":null,"abstract":"<div><div>The high-temperature slag produced during the steelmaking process presents a significant opportunity for waste heat recovery and material utilization. Centrifugal granulation is acknowledged as an effective treatment method for managing this slag. However, the compact design of centrifugal granulation equipment poses a challenge in achieving the necessary cooling rates for high-temperature slag relying solely on gas-solid heat transfer within a confined space. This paper presents a physical model for the gas-solid two-phase interaction of an ultra-dilute high-temperature particle cluster and analyzes its heat exchange with vertical heating surfaces. The research indicates that radiative heat transfer is the primary mode of heat exchange between the particles and the heated surface, constituting more than 50 %. Moreover, heat is transferred from the particles through the air to the heated surface. Significantly, lowering the air inlet temperature and the particle velocity greatly improves the heat transfer performance and overall efficiency. Additionally, increasing the air flow rate can offset the decrease in contact thermal conductivity and radiative heat transfer that may occur due to increased spacing between the vertical tube bundle heating surfaces, thus promoting particle heat transfer. This study is crucial for guiding the improvement of heat transfer techniques for high-temperature molten particles in confined spaces.</div></div>","PeriodicalId":10019,"journal":{"name":"Chemical Engineering Research & Design","volume":"212 ","pages":"Pages 445-456"},"PeriodicalIF":3.7,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706405","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}
{"title":"Proactive scheduling of steelmaking-continuous casting with uncertain processing times under carbon emission reduction","authors":"Yaluo Zhou , Hengju Xiang , Wenzhe Zhou , Wenguang Liu , Ruicheng Zhang","doi":"10.1016/j.cherd.2024.11.023","DOIUrl":"10.1016/j.cherd.2024.11.023","url":null,"abstract":"<div><div>To solve the proactive scheduling problem of steelmaking-continuous casting with uncertain processing time, a fuzzy scheduling model is established to minimize the total completion time, maximum elapsed time, and carbon emission, considering machine energy consumption. An improved multi-objective beluga whale optimization algorithm (MOBWO-VNS) is proposed to solve it. In MOBWO-VNS, the process-machine matching rule is used to enhance the quality of initial solutions, an adaptive layered evolution strategy is designed to improve the convergence speed, and a variable neighborhood search strategy is introduced to strengthen the algorithm's local search capability. The diversity and convergence of the algorithm are verified by the benchmark function. A comparison experiment between deterministic scheduling and fuzzy scheduling is carried out using the actual production data of a steel plant, and the feasibility and robustness of fuzzy scheduling are verified. Large-scale scheduling evaluation experiments are designed using large-scale data, and the results show that the proposed model and algorithm reduce the total completion time, maximum elapsed time, and carbon emissions by 7.6 %, 19.2 %, and 2.2 %, respectively. Results show that this study can optimize the time and energy consumption targets, improve the production efficiency of enterprises, and provide strong support for the green transformation of steel enterprises.</div></div>","PeriodicalId":10019,"journal":{"name":"Chemical Engineering Research & Design","volume":"212 ","pages":"Pages 421-433"},"PeriodicalIF":3.7,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706457","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}