Article
Biotechnology & Applied Microbiology
Gisela Nadal-Rey, Dale D. McClure, John M. Kavanagh, Benny Cassells, Sjef Cornelissen, David F. Fletcher, Krist Gernaey
Summary: This article provides a numerical comparison using Computational Fluid Dynamics of different industrially relevant reactor types operated under realistic industrial conditions, evaluating local flow variables and mixing times. It predicts typical values of mixing time and oxygen transfer rate in industrial bioreactors, serving as a basis for comparing different reactor types.
BIOCHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Chemical
John A. Thomas, Xiaoming Liu, Brian DeVincentis, Helen Hua, Grace Yao, Michael C. Borys, Kathryn Aron, Girish Pendse
Summary: Biomanufacturing processes for producing biologic drugs are crucial in the pharmaceutical industry, and the oxygen transfer rate model poses challenges for process scale-up and intensification. This study introduces a physics-based model and validates it with experimental data, demonstrating real-time calculations feasible for industrial applications.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Food Science & Technology
Jozef Ritonja, Andreja Gorsek, Darja Pecar, Tatjana Petek, Bostjan Polajzer
Summary: This paper focuses on developing a dynamic mathematical model that considers the impact of temperature changes on the dynamics of CO2 produced during fermentation in a batch bioreactor for milk fermentation. Through laboratory tests and theoretical analysis, a new mathematical model was developed and verified through experiments, showing suitability for simulations and control system design for batch bioreactors.
Review
Biotechnology & Applied Microbiology
Marina P. Elisiario, Heleen De Wever, Wouter Van Hecke, Henk Noorman, Adrie J. J. Straathof
Summary: Syngas fermentation for biofuels and chemicals is a promising technology in the biobased economy. Membrane bioreactors show potential in overcoming limitations in gas-to-liquid mass transfer, with parameters like membrane material, module, and flow configuration playing key roles in enhancing performance. Model-based approaches are recommended for optimizing membrane bioreactor performance.
CRITICAL REVIEWS IN BIOTECHNOLOGY
(2022)
Article
Thermodynamics
M. Ravikumar, M. K. Srinath, M. S. Ganesha Prasad
Summary: The thermal modeling of microwave dehydration of papaya fruit slice was established and the temperature and moisture content were investigated using Computational Fluid Dynamics (CFD) model. The results showed that the temperature was higher at the surface corner and lower at the symmetry leading edge. Water depletion was more efficient when the surface temperature was higher and the surface moisture was lower.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Engineering, Chemical
Yongsheng Pei, Zhenfeng Li, Chunfang Song, Jing Li, Wanxiu Xu, Guanyu Zhu
Summary: Mathematical models were developed to simulate the heat and mass transfer during hot air drying of ginger slices in different drying modes. The models showed good fit with experimental data and demonstrated the effectiveness in various drying modes. The temperature and moisture distribution models revealed that the low temperature gradient between the surface and the core had little effect on the drying results. Among all drying modes, the L-H-L mode performed the best in terms of maximum moisture difference and final moisture difference. This mode also resulted in higher rehydration ratio, better microstructure, less color difference, higher total gingerol content, and good sensory evaluation for the final product quality. It was recommended to keep the air temperature low at the beginning and final stages for quality and storage safety considerations, while increasing the drying temperature in the middle stage to accelerate the drying speed.
JOURNAL OF FOOD ENGINEERING
(2022)
Article
Engineering, Chemical
Wanqiang Wu, Lunbo Duan, Lin Li, Zhihao Yang, Daoyin Liu, Edward John Anthony
Summary: This study investigates the effects of pressure, superficial velocity, and particle size on gas interchange between bubble and emulsion phases in a high-temperature oxy-fuel fluidized bed. Both experiments and CFD simulations were used to analyze the gas interchange coefficient, which was found to decrease with increasing pressure and increase with increasing superficial velocity and particle size. The study proposes a formula to calculate the gas interchange coefficient considering the influence of pressure on the gas diffusion coefficient in a pressurized oxy-fuel fluidized bed.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Astronomy & Astrophysics
Zhenyu Wu, Giacomo Ricigliano, Rahul Kashyap, Albino Perego, David Radice
Summary: We developed a method to compute synthetic kilonova light curves by combining numerical relativity simulations and radiation-hydrodynamics code. Our approach was validated and applied to different scenarios, studying the sensitivity of the results to various factors. The study showed that hydrodynamic effects are typically negligible and homologous expansion is a good approximation, but pressure forces can amplify uncertainties in the heating rates.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Environmental Sciences
Mei Pan, Haizong Li, Xiangyun Han, Guixiang Quan, Weixing Ma, Qingyuan Guo, Xuan Li, Bairen Yang, Cheng Ding, Yuxi Chen, Tao Yun, Jiaojiao Qin, Siyi Jiang
Summary: Biofilms play a crucial role in driving ecosystem processes in rivers. This study provides a basis for quantifying the contribution of biofilms to the nitrogen cycle. The study shows that biofilms go through different stages of growth, and the removal efficiency of nitrogen increases as the biofilm matures. The layered structure of the biofilm and the dissolved oxygen flux explain the differences in nitrogen migration and transformation under different hydrodynamic conditions. This study suggests that controlling biofilm growth and optimizing hydrodynamic conditions can improve the nitrogen removal capacity of biofilms.
Review
Biochemistry & Molecular Biology
Lalit Goswami, Anamika Kushwaha, Suchada Chanprateep Napathorn, Beom Soo Kim
Summary: Microbial polyhydroxyalkanoates (PHA) are promising biodegradable polymers that can alleviate environmental problems caused by petroleum-based plastics. However, the increasing waste removal issue and the high cost of pure feedstocks for PHA biosynthesis have led to the need for utilizing waste streams from various industries as feedstocks for PHA production. This review summarizes the state-of-the-art progress in utilizing low-cost carbon substrates, effective upstream and downstream processes, and waste stream recycling to achieve process circularity. It also discusses the use of different bioreactor systems and advanced tools and strategies to enhance productivity and reduce costs in microbial PHA biosynthesis.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Engineering, Chemical
Oscar Zalla Sampaio Neto, Lilian Caroline Kramer Biasi, Marcela Cravo Ferreira, Daniel Gonsalves, Antonio Carlos Silva Neto, Eduardo Augusto Caldas Batista, Antonio Jose de Almeida Meirelles
Summary: This article proposes a new mathematical model to describe the solute concentration distribution in solid-liquid extraction. The model considers the movement of the liquid phase and can calculate the transient and local solute concentrations in the loading zone. Experimental results demonstrate that the model is consistent with reality and can be used to simulate solid-liquid extraction operations.
JOURNAL OF FOOD ENGINEERING
(2022)
Article
Engineering, Chemical
Tao Yang, Shujun Geng, Fei Gao, Taobo He, Jingcai Cheng, Qingshan Huang, Chao Yang
Summary: The study systematically investigated the hydrodynamics and mass transfer of a newly invented internal loop airlift slurry reactor under different conditions, proposed empirical models for critical parameters, and discovered an internal fluid relay circulation phenomenon in the riser at high gas velocities. Structural optimization ideas were suggested based on visual observation, picture sequences, and theoretical analysis. The reactor was found to have axial solid concentration deviations, particles inclined to the wall, and consistent particle size distributions throughout, indicating its potential for industrial use with further optimization.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Tylor Walsh, Brett Abraham, Tak-Ho Chu, Jeff Biernaskie, Rajiv Midha, Michael S. S. Kallos
Summary: Regenerative therapies for peripheral nerve and spinal cord injuries often require a large number of autologous cells. Harvesting Schwann cells (SCs) from nerves is currently used, but it is invasive. An alternative approach is using skin-derived Schwann cells (Sk-SCs), which can be obtained from a skin biopsy. However, expanding the cells to a clinically relevant number is still inefficient. This study presents a bioprocess using rat Sk-SCs, which successfully expanded 3 million cells to over 200 million cells in just 6 days, providing a dramatic improvement in cell expansion.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Review
Agricultural Engineering
Giorgio Mannina, Marion Alliet, Christoph Brepols, Joaquim Comas, Jerome Harmand, Marc Heran, Nesrine Kalboussi, Jacek Makinia, Angel Robles, Taise Ferreira Reboucas, Bing-Jie Ni, Ignasi Rodriguez-Roda, Maria Victoria Ruano, Giorgio Bertanza, Ilse Smets
Summary: Integrated Membrane Bioreactor (MBR) models, which combine biological and physical models, are powerful tools for achieving high environmental sustainability. This paper, produced by the International Water Association (IWA) Task Group on Membrane Modelling and Control, reviews the latest technology, identifies gaps in future research, and proposes a new integrated MBR modeling framework aimed at guiding researchers and managers towards optimal MBR performance.
BIORESOURCE TECHNOLOGY
(2021)
Article
Chemistry, Physical
BingQian Li, Changjun Zou, Hao Liang, Wenjing Chen, Shuai Lin, Ya Liao
Summary: The study demonstrated the enhancement of liquid-liquid extraction of n-butanol-succinic acid-water with low interfacial tension by nanofluids prepared using a two-step method. The addition of nanoparticles improved the extraction efficiency, with Al2O3 nanofluids generally outperforming TiO2 nanofluids, achieving up to 90% extraction efficiency and an overall mass transfer coefficient of 130.2 μm·s^-1.
CHEMICAL PHYSICS LETTERS
(2021)
Article
Engineering, Chemical
R. Jimenez-Robles, C. Gabaldon, V Martinez-Soria, M. Izquierdo
Summary: The combination mode of using vacuum and nitrogen as sweep gas in a microporous polypropylene membrane contactor showed higher efficiency for the recovery of dissolved methane from water compared to using vacuum or sweep gas separately. To maximize energy output, operation under specific G/L ratios and vacuum conditions is needed.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Biotechnology & Applied Microbiology
M. Capilla, P. San-Valero, M. Izquierdo, J. M. Penya-roja, C. Gabaldon
Summary: This study evaluated the influence of initial glucose concentrations and pH control strategies on biobutanol production and glucose consumption. The results showed that different pH control conditions had a significant impact on butanol production under different initial glucose concentrations.
BIOCHEMICAL ENGINEERING JOURNAL
(2021)
Article
Environmental Sciences
Keisy Torres, Francisco Javier Alvarez-Hornos, Carmen Gabaldon, Paula Marzal
Summary: This study investigated microbial granule formation in two chitosan-assisted reactors operating under different hydrodynamic regimes, showing stable treatment of solvent-containing wastewater with high COD removal efficiency. The use of a memory dose of chitosan helped maintain high quality of microbial granules during the process.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2021)
Article
Agricultural Engineering
A. Valles, M. Capilla, F. J. Alvarez-Hornos, M. Garcia-Puchol, P. San-Valero, C. Gabaldon
Summary: The research found that optimizing NaOH pretreatment conditions can effectively increase the efficiency and yield of producing biobutanol from rice straw. The optimal conditions of 5% solid loading and 0.75% NaOH led to a biomass utilization rate of 77.6 g kg RS-1.
BIOMASS & BIOENERGY
(2021)
Article
Agricultural Engineering
Alejo Valles, Javier Alvarez-Hornos, Miguel Capilla, Pau San-Valero, Carmen Gabaldon
Summary: This study demonstrated that fed-batch SSFR can enhance butanol production efficiency from alkaline-pretreated rice straw, with increased productivity and efficient enzyme utilization. Although additional nutrients were required, the approach showed promise for improving biofuel production from lignocellulosic biomass.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Chemical
R. Jimenez-Robles, C. Gabaldon, J. D. Badia, M. Izquierdo, V Martinez-Soria
Summary: This study investigates the performance of commercial polymer membranes in recovering dissolved methane from water using a flat sheet membrane module degassing contactor. The results show that the mass transfer resistance mainly occurs in the liquid phase. Microscopy and contact angle measurements are used to monitor the structural and surface stability of the membranes during operation. This combination of techniques proves to be versatile and useful in tracking the changes in membrane properties.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Energy & Fuels
Miguel Capilla, Alejo Valles, Pau San-Valero, Francisco Javier Alvarez-Hornos, Carmen Gabaldon
Summary: This study developed a novel fermentation strategy to improve xylose conversion in biofuel production from lignocellulosic wastes. By controlling pH(min)>4.8 and using a co-culture of Clostridium acetobutylicum and Saccharomyces cerevisiae, sugar consumption and solvent production were significantly enhanced.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Energy & Fuels
Helena Poy, Alejo Valles, Estela Lladosa, Carmen Gabaldon, Sonia Loras
Summary: This study evaluated the use of protic ionic liquids (PILs) based on acetate and hydrogen sulfate anions for biomass pretreatment and investigated the potential of PIL reuse. The results showed that under certain conditions, these PILs could significantly enhance the yields of glucose and xylose from rice straw. Furthermore, the study demonstrated the feasibility of PIL reuse for multiple cycles without compromising the effectiveness of biomass pretreatment.
Article
Biotechnology & Applied Microbiology
Miguel Capilla, Carlos Silvestre, Alejo Valles, Francisco Javier Alvarez-Hornos, Pau San-Valero, Carmen Gabaldon
Summary: The study showed that pH regulation can influence monosaccharide composition in batch and continuous fermentation processes, impacting butanol production and productivity.
FERMENTATION-BASEL
(2022)
Article
Engineering, Chemical
Qing Han, Mengqing Shi, Linkai Han, Di Liu, Mingwei Tong, Yuxin Xie, Zhonghua Xiang
Summary: Developing highly efficient bifunctional oxygen electrocatalysts is crucial for zinc-air flow batteries. Metal-organic frameworks (MOFs) and covalent organic polymers (COPs) have emerged as promising alternatives due to their designable and controllable atomic-level structures. However, their catalytic performances are limited by conductivity and catalytic activity. In this study, nanosheet FeNi-MOF and iron phthalocyanine rich COP hybrid materials are assembled through the pi-pi stacking effect to create highly efficient bifunctional electrocatalysts. The resulting catalyst exhibits superior catalytic performance and stability, making it a promising candidate for zinc-air flow batteries.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Daria Grigorash, Dmytro Mihrin, Rene Wugt Larsen, Erling H. Stenby, Wei Yan
Summary: The article introduces a new approach to describe the cross-association between molecules, allowing for the simulation of weakly bound molecular complexes with different conformations in mixtures. By incorporating this approach into the equation of state, accurate predictions of vapor-liquid equilibrium and liquid-liquid equilibrium can be made. The new method is validated through experiments on alcohol and acid mixtures, with the results compared to experimental data, demonstrating its accuracy and reliability.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Mohammed Al-Sharabi, Daniel Markl, Vincenzino Vivacqua, Prince Bawuah, Natalie Maclean, Andrew P. E. York, Axel Zeitler
Summary: This study used terahertz pulsed imaging to investigate the transport process of different solvents into ceramic catalytic materials. The results showed that the heating rate of the samples influenced the water transport rate, while the viscosity of 1-octanol slowed down its transport.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Chukwunonso Anyaoku, Sati Bhattacharya, Rajarathinam Parthasarathy
Summary: This study aimed to enhance understanding of settling dynamics in viscoelastic fluids by developing a semi-empirical correlation and a dimensionless ratio, which accurately described the characteristics of settling suspensions.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Antti I. Koponen, Janika Viitala, Atsushi Tanaka, Baranivignesh Prakash, Olli-Ville Laukkanen, Ari Jasberg
Summary: This study focuses on the development of foam application chemicals for the paper and board industry. The research explores the rheology of the polyvinyl alcohol foam used in the process. Measurements were conducted to determine the foam viscosity and slip flow. The results suggest that slip flow contributes significantly to the total flow rate, and the obtained viscosity and slip models provide a solid foundation for industrial processes.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Dalei Sun, Jinghui Cai, Yating Yang, Zhiwu Liang
Summary: In this study, Fe-doped alpha-Bi2O3 catalysts with different Fe/Bi molar ratios were synthesized and utilized in the carbonylation of isobutyl amine with CO2. The results showed that Fe doping significantly enhanced the catalytic abilities of alpha-Bi2O3.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Yuan Tian, Xinxin Wang, Yanrong Liu, Wenping Hu
Summary: This paper predicts the solubility of nitrogen gas in ionic liquids (ILs) using two quantitative structure-property relationship (QSPR) models. By combining machine learning methods and ionic fragments contribution method, the accuracy and reliability of the prediction models are improved.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Liwang Wang, Wei Liu, Pan Yang, Yulong Chang, Xiaoxu Duan, Lingyu Xiao, Yaoming Hu, Jiwei Wu, Liang Ma, Hualin Wang
Summary: This study investigates the effective phase interfacial area (ae) of hydro-jet cyclones at different injection angles. The results show that a 45 degrees upward incidence angle yields the most favorable flow field characteristics for efficient mass transfer. The significant enhancement in ae of the hydro-jet cyclones offers the advantage of reducing equipment volume and cost savings.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Chuanjun Wu, Jiangzhi Chen, Jiyue Sun, I-Ming Chou, Shenghua Mei, Juezhi Lin, Lei Jiang
Summary: In this study, the solubility of H2S hydrate in water was measured using Raman spectroscopy. The results showed that the solubility increases with temperature under certain equilibrium conditions, and the solubility also depends on pressure and temperature under different equilibrium conditions. A thermodynamic model based on the van der Waals-Platteeuw theory was developed to predict the solubility, demonstrating its accuracy.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Lorenzo Brivio, Serena Meini, Mattia Sponchioni, Davide Moscatelli
Summary: This study investigates the influence of three main parameters and proposes a kinetic model to predict the optimal operating conditions for high yield of dimethyl terephthalate (DMT) in the chemical recycling process of polyethylene terephthalate (PET).
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Hongju Lin, Fanhui Liao, Yanchang Chu, Mingyu Xie, Lun Pan, Yuanyuan Wang, Lijian Leng, Donghai Xu, Le Yang, Gangfeng Ouyang
Summary: A honeycomb NiCo/C-Na catalyst with a micro-meso-macroporous structure has been fabricated and shown to have significantly higher catalytic activity for the decarboxylation of fatty acids. It also proves to be efficient in upgrading sludge HTL bio-crude, resulting in a biofuel with decreased viscosity and increased density.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Xiaoxian Li, Rui Li, Min Lin, Mingde Yang, Yulong Wu
Summary: A series of coated non-noble metal porous carbon catalysts were synthesized and applied to the aqueous-phase deoxygenation of algal bio-oil. One of the catalysts showed excellent deoxygenation selectivity and catalytic activity at 250 degrees C. The catalyst exhibited good hydrothermal stability and the reaction mechanism was proposed based on product analysis and active site analysis.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
M. V. Chudakova, M. V. Popov, P. A. Korovchenko, E. O. Pentsak, A. R. Latypova, P. B. Kurmashov, A. A. Pimenov, E. A. Tsilimbaeva, I. S. Levin, A. G. Bannov, A. V. Kleymenov
Summary: A series of catalysts with different potassium contents were prepared using solution combustion synthesis and characterized using various techniques. The results showed that the potassium content affected the phase composition and texture of the catalysts. The addition of a small amount of potassium resulted in a change in particle size distribution, leading to higher hydrogen yield. The Ni-1%K2O/Al2O3 catalyst exhibited the highest hydrogen yield at temperatures of 675 and 750 degrees Celsius.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Aliakbar Roosta, Nima Rezaei
Summary: In this study, we modified the electrolyte cubic plus association equation of state (e-CPA EoS) and integrated it with two electrical conductivity models to estimate the electrical conductivity of 11 monovalent electrolyte solutions in water. The modified e-CPA model demonstrated better performance and the hybridization with electrical conductivity models resulted in two predictive models for estimating the electrical conduction of dilute and concentrated electrolyte solutions. These predictive models showed relative average percentage deviations (AARD) of 11.15% and 13.87% over wide ranges of temperature and electrolyte concentration.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Haoren Niu, Jianzheng Wang, Qingzhu Jia, Qiang Wang, Jin Zhao, Fangyou Yan
Summary: A study developed two quantitative structure-property relationship models for the complexation performance of alpha- and beta-cyclodextrins and validated their stability and predictive ability through internal and external validation. The models showed robustness and satisfactory performance, as demonstrated by the experimental results and model validations. These models can effectively predict the binding constants between cyclodextrins and various types of molecules, providing valuable tools for cyclodextrin design.
CHEMICAL ENGINEERING SCIENCE
(2024)
