Article
Biotechnology & Applied Microbiology
Libor Zverina, Manuel Pinelo, John M. Woodley, Anders E. Daugaard
Summary: Enzymatic oxidation is significant in organic chemistry. A tubular reactor with a porous monolith and an O-2-permeable wall was developed for efficient glucose oxidation. The reactor demonstrated high product concentration for over 10 hours at a constant flow rate, showing potential for extended continuous operation and optimization for various gas-dependent biocatalytic transformations.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2021)
Article
Engineering, Chemical
Michal Wojasinski, Joanna Latocha, Paulina Liszewska, Lukasz Makowski, Pawel Sobieszuk, Tomasz Ciach
Summary: By using a scaled-up BOX reactor, we successfully synthesized hydroxyapatite nanoparticles and found that particles from different reactors have similar sizes, all being very small. Additionally, we can efficiently obtain hydroxyapatite nanoparticles through this method, providing a stable and efficient production method for medical and dental applications.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Engineering, Environmental
Jie Zhu, Jiangtao Yu, Peiwen Wu, Jixing Liu, Haiyan Ji, Peng Cui, Yanhong Chao, Wenshuai Zhu, Haiyan Liu, Zhichang Liu
Summary: The 3D-CeO2/ATP monolithic adsorbents were successfully constructed through a 3D printing strategy, showing excellent adsorption desulfurization performance of more than 85 % sulfur removal at room temperature. Combined with a 3D-printed multifunctional fixed-bed reactor, a reaction process capable of adsorption-elution was designed for deep adsorption of sulfide in fuel and resource recovery of high-value sulfide products. The structure and physicochemical property of the 3D-CeO2/ATP monolithic adsorbents were characterized, and the adsorption and elution mechanism were investigated in detail.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Yingcheng Wu, Jing He, Wenfeng Huang, Wenwen Chen, Xiaojie She, Yanhua Song, Wenshuai Zhu, Huaming Li, Hui Xu
Summary: In this study, a direct photo-curing 3D printing based method was developed for manufacturing precise monolithic catalysts for oxidative desulfurization of fuels. The 3D printing technology and post-treatment were employed to spatially distribute numerous molybdenum oxide nanoparticles with a high density of oxygen vacancies in three-dimensional Al2O3, resulting in excellent catalytic performance. Furthermore, a monolithic agitating impeller was 3D printed using this tailored catalyst, serving as a stirring reactor with dual functions of mixing and catalysis.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Nicholas M. Wang, Sam Dillon, Damien Guironnet
Summary: We demonstrated that organometallic catalysts can be immobilized in a gas-phase packed bed reactor by coating inorganic particles with a non-volatile polymer-catalyst solution. The methodology was validated through case studies on the ethanol coupling reaction and the hydrogenation of hexene using specific catalysts. This technique can inspire the adoption of advanced reactor engineering strategies for homogeneous catalyst studies.
Article
Environmental Sciences
Sher Ahmad, Wassim Sebai, Marie-Pierre Belleville, Nicolas Brun, Anne Galarneau, Jose Sanchez-Marcano
Summary: In this study, laccase was immobilized in highly porous silica monoliths and used for the degradation of tetracycline. The effects of different factors on the degradation efficiency were investigated through experiments and simulations, and the optimal conditions were determined.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Environmental
Ji Hun Bang, Christian Ariane Santos, Young Min Jo
Summary: A study investigated the reduction of VOCs generated in urban workplaces using a non-thermal plasma reactor, which showed that optimizing process design and recirculation rate can improve decomposition efficiency and system efficiency while decreasing the by-product ozone concentration.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Agricultural Engineering
Carolina Feickert Fenske, Yasin Md, Dietmar Struebing, Konrad Koch
Summary: Biological methanation is a promising technology for converting H2 and CO2 into renewable energy sources. The performance of methanation in trickle bed reactors can be enhanced by achieving plug flow. By conducting gas flow experiments, this study identified reactor-specific properties and optimization potentials for improved methanation performance.
BIORESOURCE TECHNOLOGY
(2023)
Article
Construction & Building Technology
Rusheng Qian, Cheng Liu, Guojian Liu, Zhiyong Liu, Bo Pang, Wei She, Yunsheng Zhang
Summary: The apparent gas permeability of concrete is highly dependent on pore structure and gas medium. The effects of gas absorption from CO2 and O-2 on permeability are minimal, with O-2 having higher permeability than CO2. Significant differences in Knudson diffusion near the outlet-gas side of concrete contribute to deviations in permeability.
CEMENT & CONCRETE COMPOSITES
(2021)
Article
Engineering, Chemical
Mojtaba Mirdrikvand, Mehrdad Sadeghi, Georg R. Pesch, Wolfgang Dreher, Jorg Thoming
Summary: Understanding the influence of gas flow maldistribution in honeycombs is important for process design in various technical applications. Both numerical simulations and experimental measurements were used to study the effects of maldistribution, showing good agreement and reliability in studying gas hydrodynamics within opaque monolith structures.
Article
Mechanics
Yudong Zhang, Xiao Wu, Bangbang Nie, Aiguo Xu, Feng Chen, Ronghan Wei
Summary: In micro- and nanoscale channels, flow characteristics exhibit discontinuity due to the small scale and rarefaction. The conventional continuum-based models are inadequate for describing such flow behavior, therefore adopting kinetic models based on statistical mechanics becomes necessary. This paper presents a novel discrete Boltzmann model specifically tailored for non-equilibrium flows at the micro-nanoscale and demonstrates its effectiveness through numerical simulations.
Article
Polymer Science
Zhouquan Sun, Hui Su, Yi Zhong, Hong Xu, Bijia Wang, Linping Zhang, Xiaofeng Sui, Xueling Feng, Zhiping Mao
Summary: In this study, a novel 3D porous cellulose-chitosan hybrid gel macrospheres (CCMs) with high specific surface area were prepared by dissolving cellulose and chitosan in alkaline urea system, then regenerating in weakly alkaline by sol-gel method and solvent exchange. The cellulose-chitosan macrospheres were characterized by various techniques and it was found that alpha-amylase could be successfully immobilized on them, showing improved thermal stability, broad pH adaptability, and enhanced storage stability compared to free enzymes. After 10 cycles, the immobilized enzymes retained 77.5% of their initial activity.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2022)
Article
Mechanics
Andrew A. Oliva, Scott C. Morris
Summary: A closed-form solution is proposed for internal compressible flows with various combinations of area change, heat addition, friction, and non-uniform flow. The approach assumes steady flow of a calorically perfect ideal gas using the integral form of governing equations. The solutions are compared with known solutions and found to be in agreement with available data.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Chemistry, Analytical
Qisen Cheng, Yutao Qin, Yogesh B. Gianchandani
Summary: This paper presents a bidirectional Knudsen pump with a 3D-printed thermal management platform for microscale gas chromatography applications. Utilizing thermal transpiration, the pump operates without moving parts and efficiently manages heat, making it compact and integrative. The pump achieves high flow rates and blocking pressures using membranes with different properties, showcasing versatility in performance.
Article
Energy & Fuels
Keigo Shimizu, Kairi Kato, Tomoyuki Kobayashi, Yoshiyuki Komoda, Naoto Ohmura
Summary: This study experimentally investigated the flow characteristics and mixing properties of two-phase flow in a continuous Taylor-Couette flow reactor (CTCR) with a narrow gap width. The study revealed the occurrence of slug flows with alternating gas and liquid phases, similar to what is observed in microchannels, in a certain flow regime of the CTCR with a gap width of 0.5 mm, which is the narrowest ever studied. The non-dimensional effective diffusion coefficient Deff/uL of the slug flow was measured and it was found that ideal plug flow mixing characteristics could be achieved under this flow condition.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2023)
Article
Chemistry, Physical
Seung-Rae Kim, Wan-Kuen Jo
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2019)
Article
Engineering, Environmental
Yeong Gyeong Kim, Wan-Kuen Jo
JOURNAL OF HAZARDOUS MATERIALS
(2019)
Article
Chemistry, Physical
Dong Jin Kim, Wan-Kuen Jo
APPLIED CATALYSIS B-ENVIRONMENTAL
(2019)
Article
Chemistry, Physical
Sang Won Lee, Sang-Hoon Kim, Wan-Kuen Jo, Won-Hwa Hong, Woong Kim, Byoung Gi Moon, Sung Hyuk Park
JOURNAL OF ALLOYS AND COMPOUNDS
(2019)
Article
Materials Science, Multidisciplinary
Perumal Devaraji, Wan-Kuen Jo
MATERIALS RESEARCH BULLETIN
(2019)
Article
Chemistry, Physical
Jong Uk Choi, Yeong Gyeong Kim, Wan-Kuen Jo
APPLIED SURFACE SCIENCE
(2019)
Article
Engineering, Environmental
Wan-Kuen Jo, Surendar Tonda
JOURNAL OF HAZARDOUS MATERIALS
(2019)
Article
Chemistry, Multidisciplinary
Wan-Kuen Jo, Satyanarayana Moru, Surendar Tonda
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2019)
Article
Chemistry, Physical
Jong Uk Choi, Wan-Kuen Jo
APPLIED SURFACE SCIENCE
(2019)
Article
Engineering, Multidisciplinary
Wan-Kuen Jo, Santosh Kumar, Surendar Tonda
COMPOSITES PART B-ENGINEERING
(2019)
Article
Materials Science, Multidisciplinary
Mi Gyeong Kim, Wan-Kuen Jo
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2020)
Article
Chemistry, Physical
Wan-Kuen Jo, Satyanarayana Moru, Surendar Tonda
APPLIED SURFACE SCIENCE
(2020)
Article
Engineering, Environmental
Seoung-Rae Kim, Wan-Kuen Jo
JOURNAL OF HAZARDOUS MATERIALS
(2019)
Article
Chemistry, Physical
Wan-Kuen Jo, Satyanarayana Moru, Surendar Tonda
JOURNAL OF MATERIALS CHEMISTRY A
(2020)
Article
Construction & Building Technology
Parth Bansal, Steven Jige Quan
Summary: This study investigates the relationship between urban form and canopy layer urban heat island (CUHI) using a relatively large sample of microclimate sensors in Seoul, Korea. The study compares different statistical models and finds that the spatially explicit gradient boosting decision tree (GBDT) model has the highest accuracy. The study also shows that the effect of urban form on CUHI varies at different time instances during the day. These findings provide valuable insights for planners to understand the complexity of urban climate and reduce CUHI magnitude.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Miaomiao Liu, Salah Almazmumi, Pinlu Cao, Carlos Jimenez-bescos, John Kaiser Calautit
Summary: Windcatchers provide effective low-energy ventilation and summer passive cooling in temperate climates. However, their use in winter is limited due to significant ventilation heat loss and potential discomfort. This study evaluates the applicability of windcatchers in low-temperature conditions, highlighting the need for control strategies to reduce over-ventilation and the integration of heat recovery or thermal storage to enhance winter thermal conditions.
BUILDING AND ENVIRONMENT
(2024)
Review
Construction & Building Technology
Behrouz Nourozi, Aneta Wierzbicka, Runming Yao, Sasan Sadrizadeh
Summary: This article presents a systematic review of ventilation solutions in hospital wards, aiming to enhance pathogen removal performance while maintaining patient and healthcare staff comfort using air-cleaning techniques. The study reveals the importance of proper ventilation systems in reducing infection risk and adverse effects of cross-contamination.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Zhen Yang, Weirong Zhang, Hongkai Liu, Weijia Zhang, Mingyuan Qin
Summary: The study examines the influence of personalized local heating on the thermal comfort of occupants in old residential buildings. The findings reveal that personalized local heating can increase the overall thermal sensation of occupants, but only a few methods are effective in enhancing thermal comfort. The chosen heating methods and background temperature affect the participants' selection of heating parts.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Hong Cheng, Dan Norback, Huilin Zhang, Liu Yang, Baizhan Li, Yinping Zhang, Zhuohui Zhao, Qihong Deng, Chen Huang, Xu Yang, Chan Lu, Hua Qian, Tingting Wang, Ling Zhang, Wei Yu, Juan Wang, Xin Zhang
Summary: The home environment and sick building syndrome (SBS) symptoms in five southern Chinese cities have been studied over time. The study found a decrease in asthma prevalence and an increase in allergic rhinitis. Cockroaches, rats, mice, mosquitoes or flies were identified as consistent biological risk factors for SBS symptoms, while redecoration, buying new furniture, and traffic air pollution were identified as other risk factors.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Chaojie Xing, Zhengtao Ai, Zhiwei Liu, Cheuk Ming Mak, Hai Ming Wong
Summary: This study experimentally investigated the emission characteristics of droplets around the mouth during dental treatments. The results showed that the peak mass fraction of droplets occurs within the size range of 20 μm to 100 μm, and droplets with a diameter less than 200 μm account for over 80% of the mass fraction. The dominant emission direction of droplets is towards the dummy's head and chest, forming an approximately cone shape.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Zhijian Liu, Zhe Han, Lina Hu, Chenxing Hu, Rui Rong
Summary: This study compared the effects of different respiratory behaviors on the distribution of aerosols in a ward and the risk of infection for healthcare workers using numerical simulation. It was found that talking in the ward significantly increased aerosol concentrations, particularly short periods of talking. Wards designed with side-supply ventilation had lower overall infection risk. Talking alternately between healthcare workers and patients slightly extended the impact time of aerosols.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Yan Yan, Mengyuan Kang, Haodong Zhang, Zhiwei Lian, Xiaojun Fan, Chandra Sekhar, Pawel Wargocki, Li Lan
Summary: In a high-density city, opening windows for sleep may lead to increased indoor temperature, higher PM2.5 concentration, and noise disturbance, which can negatively impact sleep quality.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Yan Bai, Liang Liu, Kai Liu, Shuai Yu, Yifan Shen, Di Sun
Summary: This study developed a non-intrusive personal thermal comfort model using machine learning techniques combined with infrared facial recognition. The results showed that the ensemble learning models perform better than traditional models, and the broad learning model has a higher prediction precision with lower computational complexity and faster training speed compared to deep neural networks. The findings provide a reference for optimizing building thermal environments.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Yue Lei, Zeynep Duygu Tekler, Sicheng Zhan, Clayton Miller, Adrian Chong
Summary: Mixed-mode ventilation is a promising solution for achieving energy-efficient and comfortable indoor environments. This study found that occupants can thermally adapt when switching between natural ventilation (NV) and air-conditioning (AC) modes within the same day, with the adaptation process stabilizing between 35 to 45 minutes after the mode switch. These findings are important for optimizing thermal comfort in mixed-mode controls, considering the dynamic nature of thermal adaptation.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Nan Mo, Jie Han, Yingde Yin, Yelin Zhang
Summary: This study develops a method based on the LCZ framework for a comprehensive evaluation of urban-scale heat island effects, considering the impact of geographic factors on LST. The results show that Guilin's geomorphological conditions lead to abnormal heat island effects during winter, and the cooling effects of mountains and water bodies vary seasonally in different built areas, with LCZ 2 exhibiting the strongest cooling effect.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Tunga Salthammer
Summary: Monitoring the potential formaldehyde emission of wood-based materials through test chamber investigations has significantly contributed to reducing indoor formaldehyde concentrations. However, the different methodologies used in these procedures prevent direct result comparison. Empirical models for converting formaldehyde steady-state concentrations based on temperature, humidity, air change rate, and loading were developed in the 1970s and have been modified to accommodate the development of lower-emitting materials. Formaldehyde emissions from wood-based materials are complex and require nonlinear regression tools for mathematical analysis.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Katarina Stebelova, Katarina Kovacova, Zuzana Dzirbikova, Peter Hanuliak, Tomas Bacigal, Peter Hartman, Andrea Vargova, Jozef Hraska
Summary: This study investigated the impact of reduced short-wavelength light on the hormone melatonin metabolite 6-sulfatoxymelatonin (u-sMEL) and examined the association between previous day's light exposure and u-sMEL. It was found that reducing short-wavelength light during the day did not change the concentration of u-sMEL. Personal photopic illuminance was positively correlated with u-sMEL in the reference week. The illuminance had a significant impact on u-sMEL, as shown by the evaluation of the mean of all three urine samples. However, this correlation was not found in the experimental week.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Ruoxin Xiong, Ying Shi, Haoming Jing, Wei Liang, Yorie Nakahira, Pingbo Tang
Summary: This study proposes a data-model integration method to identify and calibrate uncertainties in machine learning models, leading to improved thermal perception predictions. The method utilizes the Multidimensional Association Rule Mining algorithm to identify biased human responses and enhances prediction accuracy and reliability. The study also evaluates different calibration techniques and discovers their potential in enhancing prediction reliability.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Beichao Hu, Zeda Yin, Abderrachid Hamrani, Arturo Leon, Dwayne McDaniel
Summary: This paper introduces an innovative super-resolution approach to model the air flow and temperature field in the cold aisle of a data center. The proposed method reconstructs a high-fidelity flow field by using a low-fidelity flow field, significantly reducing the computational time and enabling real-time prediction.
BUILDING AND ENVIRONMENT
(2024)