Article
Engineering, Environmental
Qingqing Rui, Qing Ye, Jinlong Li, Yao Wang, Azhi Yu
Summary: Energy-saving extractive distillation method is proposed for separating ethanol and 1,4-dioxane from industrial effluent. Ethylene glycol (EG) is chosen as entrainer in direct extractive distillation, and dimethyl sulfoxide (DMSO) is used in the indirect extractive distillation (IED) process. Heat integration and heat pump technologies are employed to reduce energy consumption. The IED-DMSO process combined with heat integration achieves the best performance, with significant reductions in total annual cost, energy consumption, CO2 emissions, and entropy generation compared to the IED-EG process.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Engineering, Chemical
Cong Duan, Chunli Li
Summary: The characteristics of the mixture of ethyl acetate and ethanol were analyzed, and a three-column extractive distillation process was proposed to separate the system efficiently. Various factors affecting the process were studied, and energy-saving processes were introduced to improve the separation efficiency. Furthermore, innovative methods were proposed to optimize the processes, leading to significant reductions in total annual cost, energy consumption, and CO2 emissions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Environmental
Yinggui Xu, Jinlong Li, Qing Ye, Yudong Li
Summary: Two energy efficient extractive distillation processes are proposed to separate acetonitrile/1,4-dioxane/water mixture, utilizing heat pumps and heat integration for energy conservation, and introducing various evaluation methods to assess process performance.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Engineering, Chemical
Xin Li, Haixia Li, Chen Li, Yumeng Wang, Wenxin Wang, Peizhe Cui, Zhaoyou Zhu, Yinglong Wang
Summary: In this study, extractive distillation, extractive pressure-swing distillation (EPSD), and pressure-swing distillation (PSD) techniques were proposed and compared for the separation of the ethyl acetate/ethanol/cyclohexane azeotropic mixture. The impact of extractant on relative volatility and the analysis of the ternary phase diagram were considered, and dimethyl sulfoxide was selected as the extractant. Non-dominated sorting genetic algorithm II was used for process optimization, considering equipment and operation costs as objective functions. The improved processes showed significant reductions in cost, energy consumption, gas emissions, and energy loss compared to the conventional process.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Chen Li, Yuyang Jiao, Haixia Li, Yumeng Wang, Wenxin Wang, Xiong Zou, Zhaoyou Zhu, Xin Li, Yinglong Wang, Peizhe Cui
Summary: An efficient extractive distillation by varying pressure process (EDP) was designed to separate the azeotrope of ACN / EtOH / water, using a non-dominated sorting genetic algorithm to optimize parameters considering economic and environmental factors. The sensitivity of the azeotrope to pressure was exploited to improve process energy utilization, and heat exchange network optimization and distillation coupled pervaporation technology were applied to further enhance the separation efficiency. Among the three coupling processes, EDP-pervaporation (EDPV) exhibited the best performance, reducing the total annual cost and gas emissions significantly.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Ao Yang, Yang Su, Tao Shi, Jingzheng Ren, Weifeng Shen, Teng Zhou
Summary: An energy-efficient triple-column extractive distillation process is developed for recovering tetrahydrofuran and ethyl acetate from industrial effluent. Through a rigorous hierarchical design procedure and heat integration, the process shows improved process economics.
FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Chemical
Chao Guo
Summary: A new process for recovering ethanol and isopropyl alcohol from wastewater was proposed in this study, utilizing the ILs-SCED-HPD method instead of traditional methods such as EG-SCED and EG-DCED. The ILs-SCED-HPD process showed lower energy consumption and total annual cost compared to alternative processes, indicating its potential as a promising approach for ethanol and IPA recovery in terms of both energy and economics.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Thermodynamics
Cong Duan, Chunli Li
Summary: Three-column extractive distillation is commonly used for separating dilute azeotropic components. In this study, new findings regarding heat integration in this process are presented. It is discovered for the first time that the composition of the pre-concentrator distillate and the solvent feed temperature have unexpected effects on heat integration. Various forms of heat integration can be fully thermally integrated by adjusting parameters, including the two mentioned above. Splitting the fresh feed into two streams for the pre-concentrator and the extractive column can also improve heat-integrated processes. Based on these findings, four improvement methods are proposed and their feasibility is demonstrated through case studies.
Article
Engineering, Environmental
Lingqiang Yan, Jinlong Li, Qing Ye, Xue Jian, Xinhao Li, Licheng Xie, Jianyu Zhang
Summary: In this study, 1-butyl-3-methylimi-dazolium acetate ([BMIM][OAc]) was identified as a suitable entrainer for recycling isopropanol and ethyl acetate from wastewater through extractive distillation. The optimized processes with heat integration technology showed significant reductions in total cost, energy consumption, and gas emission compared to conventional extractive distillation processes.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Green & Sustainable Science & Technology
Haiyang Cheng, Jianhui Zhong, Yasen Dai, Yuyang Jiao, Zhaoyou Zhu, Peizhe Cui, Jianguang Qi, Yinglong Wang
Summary: This study developed a highly efficient separation of ethyl acetate/ethanol/water azeotrope using extractive distillation with a mixed solvent. The optimal process scheme was obtained through multi-objective optimization, considering both economy and environment. The results showed that the heat pump-assisted extractive distillation process had significant advantages in terms of gas emission reduction and energy consumption. This study is of great significance for the separation of high purity ethyl acetate and the recovery of wastewater.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Engineering, Environmental
Chao Wang, Yu Zhuang, Yutao Qin, Yachao Dong, Linlin Liu, Lei Zhang, Jian Du
Summary: Designing a sustainable three-column extractive distillation process is of great significance for the efficient separation of ternary multi-azeotropic mixtures with high single component content. The integration of preconcentration and solvent recovery functions improves eco-efficiency, reduces CO2 emissions, and achieves economic cost savings. The process also demonstrates higher thermodynamic efficiency compared to other separation schemes.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Engineering, Chemical
Yinggui Xu, Jinlong Li, Qing Ye, Yudong Li
Summary: This study focuses on the separation of a ternary mixture using extractive distillation, with dimethyl sulfoxide as the optimal solvent. By introducing vapor recompressed heat pump technology and heat integration, significant energy savings were achieved. Direct extractive distillation was found to be better than indirect extractive distillation, with double-heat pump assisted direct extractive distillation showing the best performance in energy conservation and cost reduction.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Computer Science, Interdisciplinary Applications
Qingjun Zhang, Wei Hou, Youguang Ma, Xigang Yuan, Aiwu Zeng
Summary: The novel contribution of this paper is the implementation of dynamic control investigation for the energy-saving double side-stream ternary extractive distillation configuration, with taking the representative example of separating a ternary benzene/isopropanol/water mixture by constructing practical and workable plumbing arrangement. The new proposed control scheme achieves stable regulatory control, particularly key control loops involve adjusting extractant flow rate in extractive column C-2 to control product isopropanol composition and regulating reflux ratio in extractive column C-1 to mitigate solvent dilution effect through composition cascade temperature control loops.
COMPUTERS & CHEMICAL ENGINEERING
(2021)
Article
Energy & Fuels
Seong Chan Lee, Hee Chul Woo, Young Han Kim
Summary: A new method using 2-methyl pentanol as an extraction solvent is proposed in this study. Thermodynamic models are constructed using molecular simulations and experimental results for process optimization, resulting in a reduction in heat consumption.
Article
Engineering, Chemical
Changfang Yin, Guilian Liu
Summary: Integrating the reaction and extractive distillation system can reduce process costs. A systematic method is proposed to determine the optimal conditions, including solvent, solvent-to-feed ratio, extractive distillation sequence, and reactor operating conditions. This method can be used to evaluate different conditions for achieving the minimum total annualized cost.
Article
Thermodynamics
G. W. Farias Neto, M. B. M. Leite, T. O. A. C. Marcelino, L. O. Carneiro, K. D. Brito, R. P. Brito
Summary: Metallurgical coke, a fuel and raw material for iron and steel industries, is obtained from coal. However, only 15% of global coal reserves have the necessary properties for metallurgical coke, making it expensive. Developing a rigorous model of the coke oven process is important for optimizing energy consumption and reducing fuel consumption, with potential efficiency improvements in the worldwide steel industry.
Article
Engineering, Chemical
Lucas de Oliveira Carneiro, Suenia Fernandes de Vasconcelos, Gilvan Wanderley de Farias Neto, Romildo Pereira Brito, Karoline Dantas Brito
Summary: Coke oven gas is an important byproduct used as an energy substitute for natural gas in the steel industry, but it requires treatment to remove impurities like ammonia and hydrogen sulfide. Developing a more efficient absorption process is crucial due to the increasing use of coke oven gas and stricter emission regulations. A model was created to evaluate solutions for greater hydrogen sulfide removal, with the best configuration showing a 5% increase in efficiency. This aligns with efforts towards environmentally responsible solutions and also resulted in a 15% reduction in raw materials costs.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Environmental
Ascendino P. de Araujo Neto, Fabricia A. Sales, Wagner B. Ramos, Romildo P. Brito
Summary: This study aims to develop a model of a Waelz kiln and evaluate the impact of different conditions on zinc recovery, providing a feasibility study for reducing environmental pollution and increasing zinc recovery rates. Results show that sludge drying can effectively increase zinc recovery rates and reduce waste emissions.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Engineering, Chemical
G. W. Farias Neto, L. O. Carneiro, L. G. S. Vasconcelos, K. D. Brito, R. Brito
Summary: The study evaluates the use of hot-vapor bypass to control the pressure in the high-pressure column of pressure-swing distillation system applied to the separation of azeotropic acetonitrile-water system, with disturbances to feed flow rate and composition. The scheme with dual pressure control shows the lowest average IAE value, and all configurations demonstrate satisfactory results in controlling the products' composition with minimal offset.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Management
Stefano Ciannella, Luciano Costa Santos
Summary: This study highlights the role of lean manufacturing practices as enablers of employee social sustainability. By identifying specific practices to prioritize during lean implementation for social sustainability purposes, this research fills a gap in the literature and raises questions for further investigation.
SOCIAL RESPONSIBILITY JOURNAL
(2022)
Article
Engineering, Chemical
M. C. Silva, W. B. Ramos
Summary: This study evaluated the control performance of pressure-swing distillation using varied diameter columns (VDC) and found that in the studied system, the PSD-UDC system had better control performance compared to the PSD-VDC system. According to the obtained ISE values, the control scheme using steam-to-feed ratio is considered a good alternative.
BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Energy & Fuels
Lucas de Oliveira Carneiro, Renata Pinto Da Silva Matos, Wagner Brandao Ramos, Romildo Pereira Brito, Karoline Dantas Brito
Summary: This study aimed to optimize the recovery process of acetic acid from vinasse through liquid-liquid extraction and heterogeneous azeotropic distillation. Results showed that the MVR configuration had the lowest total annual cost (TAC), but high capital cost; the CONV configuration had the lowest CAPEX but poor economic and environmental indicators; the FHINT configuration had intermediate OPEX and slightly higher CAPEX compared to the CONV configuration.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2022)
Article
Engineering, Chemical
Jessica Oliveira da Silva, Renata Caroline de Farias Goncalves, Karoline Dantas Brito, Wagner Brandao Ramos, Romildo Pereira Brito
Summary: Pressure-swing distillation is an important separation method for minimizing environmental impact. This study conducted an energy analysis of the process and achieved improved results through a new optimization procedure.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2022)
Article
Thermodynamics
Vipul Mann, Karoline Brito, Rafiqul Gani, Venkat Venkatasubramanian
Summary: In this study, a Grammar2vec framework based on SMILES grammar is proposed for generating dense and numeric molecular representations. The framework embeds molecular structural information in the grammar rules of SMILES string representations. Using Grammar2vec representations, machine learning models are built to predict the normal boiling point and critical temperature of molecules, and their performance is compared with group contribution methods. The results demonstrate that Grammar2vec is an effective approach for molecular representation.
FLUID PHASE EQUILIBRIA
(2022)
Article
Chemistry, Multidisciplinary
Suenia F. de Vasconcelos, Lucas O. Carneiro, Romildo P. Brito, Karoline D. Brito
Summary: The Hot Potassium Carbonate (HPC) process is used to remove CO2 from synthesis gas through an absorption process. This paper evaluates the performance of multiple correlations in representing the HPC process, using MATLAB and Aspen Plus software to test a large number of equations.
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
(2022)
Review
Biotechnology & Applied Microbiology
Sowrav Barua, Stefano Ciannella, Lukman Tijani, Jenifer Gomez-Pastora
Summary: Iron plays a vital role in blood cells, including oxygen transport and iron homeostasis. Iron is primarily found in red blood cells, but it is also stored in monocytes for the recycling of senescent red blood cells. Iron is important for the function of different leukocytes and its homeostasis is influenced by cytokines during inflammation. Fluctuations in iron content can lead to various diseases, such as anemia and hemochromatosis. Magnetophoresis is a promising technology for diagnosing and treating these iron-related disorders due to the paramagnetic nature of iron-containing cells.
BIOTECHNOLOGY AND BIOENGINEERING
(2023)
Article
Computer Science, Interdisciplinary Applications
Suenia F. de Vasconcelos, Lucas de O. Carneiro, Gladson Euler, Wagner Branda, Romildo P. Brito, Karoline D. Brito
Summary: The hot potassium carbonate (HPC) process is used to remove CO2 from synthesis gas through absorption with K2CO3 solution. The reaction is slow, and H3BO3 can be used to accelerate it. Equilibrium and rate-based models can be used to simulate the process, with the rate-based model being more recommended for accuracy. However, implementing the rate-based model is complex, while using the Murphree efficiency and Neural Networks to calculate the equilibrium model can reduce prediction errors to less than 5%.
COMPUTERS & CHEMICAL ENGINEERING
(2023)
Review
Environmental Sciences
Stefano Ciannella, Cristina Gonzalez-Fernandez, Jenifer Gomez-Pastora
Summary: On March 11, 2020, the WHO declared COVID-19 a pandemic caused by the SARS-CoV-2 virus, which is primarily transmitted through respiratory droplets and shed in bodily fluids. Wastewater-based epidemiology can monitor viral pathogens in the population and predict outbreaks, but lacks standardization in analytical procedures. RT-qPCR is the most commonly used technique to detect viral RNA in wastewater samples, and the solid portion of wastewater may be a more convenient matrix for future investigations due to higher viral load.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Chemistry, Analytical
Stefano Ciannella, Xian Wu, Cristina Gonzalez-Fernandez, Bahareh Rezaei, Jacob Strayer, Hyeon Choe, Kai Wu, Jeffrey Chalmers, Jenifer Gomez-Pastora
Summary: This study investigates the magnetic separation of 20 nm and 30 nm SPIONs dispersed in an aqueous medium at relatively low concentrations. A custom, permanent magnet-based quadrupole magnetic sorter is used. By monitoring the SPION concentrations, the influence of several variables in the separation and the kinetics of the process are analyzed.
Article
Chemistry, Multidisciplinary
Camila Cavalcanti, Wagner Ramos, Romildo Brito, Karoline Brito
Summary: This study rigorously modeled a pervaporation process for ethanol dehydration using a polyetherimide membrane, achieving high purity ethanol and up to 99.8% recovery. The generic model developed was successfully applied in simulating a cascade pervaporation unit, resulting in a 70% reduction in specific energy consumption compared to traditional distillation configurations.
