Article
Energy & Fuels
Sinang Choi, Sang-Sup Lee
Summary: Activated carbon injection upstream of a particulate matter control device is commonly used to control mercury in coal-fired flue gas. Nitrogen oxides and hydrogen chloride can enhance the efficiency of activated carbon for mercury removal. Among different chloride compounds impregnated on activated carbon, copper chloride impregnated activated carbon showed the highest mercury adsorption efficiency under specific conditions.
Article
Environmental Sciences
Ye Liu, Chenglong Ma, Jiacheng Zhou, Lin Zhu, Limei Cao, Ji Yang
Summary: In this study, an ultra-high efficiency catalyst sorbent-Se-x/Activated carbon (Se-x/AC) was synthesized and applied to remove elemental mercury (Hg-0) in coal combustion flue gas. The Se-x/AC exhibited 120 times better adsorption performance compared to conventional activated carbon. The ultra-high mercury removal performance was found to originate from the activated Se species in Se-x/AC, which chemically adsorbed and captured Hg-0 in the flue gas.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Che-Jung Hsu, Yan-Ze Xiao, Hsing-Cheng Hsi
Summary: Seawater flue gas desulfurization is effective in controlling sulfur dioxide emissions and removing mercury from coal-fired power plant flue gases. However, issues such as environmental impact and re-emission of gaseous mercury need to be addressed. The study found that copper/sulfur co-impregnated activated carbon can capture aqueous mercury and inhibit gaseous mercury re-emission effectively.
Article
Green & Sustainable Science & Technology
Rakyoung Jeon, Shin Hyuk Kim, Kwangjun Ko, Kihyun Kwon, Myungkyu Park, Ireh Seo, Min Oh, Chang-Ha Lee
Summary: This study evaluated the performance of three newly designed cartridges for next-generation gas respirators. Through flow analysis and breakthrough experiments, the researchers assessed the adsorption kinetics and computational fluid dynamics (CFD) of the cartridges. The study found that virtual engineering can be utilized to improve CFD simulation and optimize cartridge design.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Engineering, Chemical
Chaiyot Tangsathitkulchai, Suravit Naksusuk, Atichat Wongkoblap, Poomiwat Phadungbut, Prapassorn Borisut
Summary: The study investigated the equilibrium and kinetics of CO2 adsorption by coconut-shell activated carbon impregnated with sodium hydroxide at 273 K. The CO2 adsorption increased with NaOH loading and exhibited three distinctive regions. The results showed an empirical correlation between effective pore diffusivity, CO2 adsorption, and NaOH loading.
Article
Biochemistry & Molecular Biology
Ido Nir, Vladislav Shepelev, Alexander Pevzner, Daniele Marciano, Lilach Rosh, Tal Amitay-Rosen, Hadar Rotter
Summary: Inorganic phosphate compounds, such as phosphoric acid and its salts, can be used as anti-aging additives for air filters with activated carbon. These additives effectively inhibit the aging of the filters and maintain their adsorption capacity for harmful gases.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Engineering, Environmental
Farihahusnah Hussin, Mohamed Kheireddine Aroua, Rozita Yusoff
Summary: The study focuses on the preparation of adsorbents derived from palm shell waste with high carbon content and functionalized with deep eutectic solvent, leading to enhanced CO2 adsorption capacity. The relationship between adsorbent surface characteristics and CO2 adsorption performance was investigated through experiments. The DES-based activated carbon with a mixture of choline hydroxide:urea showed the highest CO2 adsorption capacity under specific conditions and maintained good performance after multiple adsorption-desorption cycles.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Environmental Sciences
Raziyeh Ahmadi, Omid Arjmand, Neda Haj Mohammad Hossein Tehrani, Atiyye Ghorbani, Alimorad Rashidi, Mehdi D. Esrafili, Hadi Hamyali
Summary: In this study, amine impregnated activated carbon was synthesized and used as an effective adsorbent for gasoline vapor uptake. The physiochemical characterization of the synthesized sorbents showed high surface area and unique micro-meso pore structure, which significantly influenced the gasoline sorption capacity. The prepared sorbents exhibited high durability and maintained a high uptake capacity after multiple cycles.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2023)
Article
Energy & Fuels
Wangsheng Yu, Lei Zhang, He Xu, Hui Wang, Xu Peng, Shengji Wu, Wei Yang, Jie Zhou
Summary: Transition metal oxide-supported activated carbon prepared by non-thermal plasma treatment showed higher Hg-0 removal efficiency and stability compared to those prepared by conventional heat treatment in this study.
Article
Biotechnology & Applied Microbiology
Mochammad Arief Budihardjo, Yudha Gusti Wibowo, Bimastyaji Surya Ramadan, Muhamad Allan Serunting, Eflita Yohana, Syafrudin
Summary: This study focuses on using activated carbon from peat soil and coal, as well as CaO from clamshell byproducts, to reduce mercury content in artificial landfill leachate. Results show that mercury reduction was successful by 81% during the adsorption process at different pH levels.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Engineering, Environmental
So Yeon Yoon, Seok Byum Jang, Kien Tiek Wong, Hyeseong Kim, Min Ji Kim, Choe Earn Choong, Jae-Kyu Yang, Yoon-Young Chang, Sang-Eun Oh, Yeomin Yoon, Min Jang
Summary: This study demonstrates that sulfur-anchored palm shell waste activated carbon powder (PSAC-S) has high Hg(II) adsorption capacity and stable adsorption behavior in water solutions. PSAC-S prepared using a one-pot wet impregnation method is suitable for a wide range of solution pH values.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Thobile Masinga, Malvin Moyo, Vusumzi Emmanuel Pakade
Summary: This study investigates the use of PEI solution-impregnated activated carbon as a potential adsorbent for the removal of toxic Cr(VI) from water. The experimental results show that high removal efficiency can be achieved at pH 3, a contact time of 120 minutes, and a dosage concentration of 1 g L-1. Kinetic and isotherm models were applied to analyze the data, and a maximum adsorption capacity of 114 mg g-1 was obtained.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Biochemistry & Molecular Biology
Nurul Noramelya Zulkefli, Rajeevelosana Seladorai, Mohd Shahbudin Masdar, Nabilah Mohd Sofian, Wan Nor Roslam Wan Isahak
Summary: This study focuses on the synthesis, characterization, and performance evaluation of core shell nanostructure adsorbent for hydrogen sulfide (H2S) capture. Different preparation techniques were used to modify commercial coconut shell activated carbon (CAC) and the performance of the synthesized adsorbents was analyzed. The results showed that a specific combination of adsorbents exhibited better adsorption capacity, but degradation was also observed.
Article
Biochemistry & Molecular Biology
Noor Ul Alamin, Amir Sada Khan, Asma Nasrullah, Jibran Iqbal, Zahoor Ullah, Israf Ud Din, Nawshad Muhammad, Shahan Zeb Khan
Summary: A cost-effective and sustainable activated carbon based on Calligonum polygonoides biomass was successfully synthesized and used in carbon-alginate beads for the adsorption of methylene blue dye. The fabricated beads demonstrated high adsorption capability and efficiency for the removal of cationic dyes from wastewater, even after recycling.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Engineering, Environmental
Aysan Ghahremani, Mehrdad Manteghian, Hamid Kazemzadeh
Summary: In this study, a novel pervaporation technique was used to impregnate nano-activated carbon on lightweight expanded clay aggregate. Various analyses were conducted to investigate the structure and morphology of the adsorbent, and the impact of different parameters on its performance was studied, resulting in maximum lead removal efficiency achieved at pH=6.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Oncology
Chul-Hee Lee, Ilhan Lim, Sang-Keun Woo, Kwang Il Kim, Kyo Chul Lee, Kanghyon Song, Chang Woon Choi, Sang Moo Lim
Summary: The study demonstrated the feasibility of Cu-64 labeled PSMA I&T in PSMA-specific PET imaging, showing high cellular uptake and stability in both in vitro and in vivo studies. Specifically, Cu-64-PSMA I&T showed significantly higher uptake in 22RV1 tumors compared to PC-3 tumors. Additionally, the PSMA blocking study using 2-PMPA had a significant impact on the Cu-64-PSMA I&T signal.
CANCER BIOTHERAPY AND RADIOPHARMACEUTICALS
(2022)
Article
Energy & Fuels
Hwajung Yoo, Sehyeok Park, Linmao Xie, Kwang-Il Kim, Ki-Bok Min, Jonny Rutqvist, Antonio Pio Rinaldi
Summary: This study presents comprehensive coupled hydro-mechanical numerical modeling of the first and second hydraulic stimulations at the Pohang enhanced geothermal system (EGS) site. The key hydro-mechanical processes of shear slip and dilation and hydraulic jacking observed in the fractured reservoir can be successfully reproduced through numerical modeling.
Article
Peripheral Vascular Disease
Mi-Hyang Jung, Ju-Hee Lee, Chan Joo Lee, Jeong-Hun Shin, Si Hyuck Kang, Chang Hee Kwon, Dae-Hee Kim, Woo-hyeun Kim, Hack Lyoung Kim, Hyue Mee Kim, In Jeong Cho, Iksung Cho, Jinseub Hwang, Soorack Ryu, Chaeyeong Kang, Hae-Young Lee, Wook-Jin Chung, Sang-Hyun Ihm, Kwang Il Kim, Eun Joo Cho, Il-Suk Sohn, Sungha Park, Jinho Shin, Sung Kee Ryu, Moo-Yong Rhee, Seok-Min Kang, Wook Bum Pyun, Myeong-Chan Cho, Ki-Chul Sung
Summary: The study found that long-term use of angiotensin receptor blockers (ARBs) was associated with a decreased risk of overall cancer and several site-specific cancers. The risk reduction was more prominent among males and heavy drinkers, and a gradual decrease in risk was observed with prolonged ARB therapy compared to ACEI use.
JOURNAL OF CLINICAL HYPERTENSION
(2021)
Article
Pharmacology & Pharmacy
Sunghee Hwang, Jee Eun Chung, Kwanghee Jun, Young-Mi Ah, Kwang-Il Kim, Ju-Yeun Lee
Summary: The Korean Anticholinergic Burden Scale (KABS) was developed as a scale specific to the Korean population, aiming to validate the associations between high anticholinergic burden and emergency department (ED) visits in older Korean adults. The study found that KABS is superior to pre-existing scales in identifying patients with high anticholinergic burden and predicting high anticholinergic burden-related ED visits.
BMC PHARMACOLOGY & TOXICOLOGY
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Inki Lee, Ilhan Lim, Byung Hyun Byun, Byung Il Kim, Chang Woon Choi, Sang-Keun Woo, Kwang Il Kim, Kyo Chul Lee, Joo Hyun Kang, Min-Ki Seong, Hyun-Ah Kim, Woo Chul Noh, Sang Moo Lim
Summary: The Cu-64-NOTA-Trastuzumab PET images showed specific uptake in HER2-expressing tumors, providing a feasible and safe monitoring tool for HER2 tumor status in patients with breast cancer.
Article
Virology
Jinwoo Kim, Miyoung Cho, Kwang Il Kim, Eun Young Min, Jongwon Lim, Suhee Hong
Summary: Infectious hematopoietic necrosis virus (IHNV) infection in rainbow trout dynamically alters the transcriptome profiles, inducing defense mechanisms primarily through pathogen recognition receptor (PRR) signaling pathways. Enrichment analysis revealed common biological process terms and Kyoto Encyclopedia of Genes and Genomes pathway analysis identified key signaling pathways at different time points. Protein-protein interaction network analysis showed an upregulation of immune system and signaling pathways early on, with downregulation of pathways related to wound healing at later stages.
ARCHIVES OF VIROLOGY
(2021)
Article
Medicine, General & Internal
In-Jeong Cho, Jeong-Hun Shin, Mi-Hyang Jung, Chae Young Kang, Jinseub Hwang, Chang Hee Kwon, Woohyeun Kim, Dae-Hee Kim, Chan Joo Lee, Si-Hyuck Kang, Ju-Hee Lee, Hack-Lyoung Kim, Hyue Mee Kim, Iksung Cho, Hae-Young Lee, Wook-Jin Chung, Sang-Hyun Ihm, Kwang Il Kim, Eun Joo Cho, Il-Suk Sohn, Sungha Park, Jinho Shin, Sung Kee Ryu, Jang Young Kim, Seok-Min Kang, Myeong-Chan Cho, Wook Bum Pyun, Ki-Chul Sung
Summary: The study found that compared to other common antihypertensive drugs, the use of ARBs was associated with a decreased risk of cancer in hypertensive patients.
JOURNAL OF CLINICAL MEDICINE
(2021)
Review
Cardiac & Cardiovascular Systems
Sang Hyun Ihm, Kwang-Il Kim, Kyung Jin Lee, Jong Won Won, Jin Oh Na, Seung-Woon Rha, Hack-Lyoung Kim, Sang-Hyun Kim, Jinho Shin
Summary: In primary prevention for cardiovascular diseases, the focus on adherence improvement needs to be shifted towards the treatment team and healthcare system. Patient-oriented approaches such as patient centered clinical communication skills, counseling using motivational strategies, decision making by patient empowerment, and a multi-disciplinary team approach should be developed and implemented.
KOREAN CIRCULATION JOURNAL
(2022)
Article
Medicine, General & Internal
Jung-Yeon Choi, Hongsoo Kim, Young-Il Jung, Seungyeon Chun, Sooyoung Yoo, Jae-Young Lim, Jin Young Ko, Kayoung Park, Kwang-Il Kim
Summary: This study examined the factors that determine the prescribing of anticholinergic drugs (DAPs) in long-term care hospitals (LTCHs) in Korea. A novel platform was used to collect data on DAP prescription patterns. The results showed that polypharmacy, higher body mass index, better cognitive and communication functions were associated with higher DAP prescribing, but these patients had lower quality of life.
KOREAN JOURNAL OF INTERNAL MEDICINE
(2022)
Review
Endocrinology & Metabolism
Hyun-Jin Kim, Kwang-il Kim
Summary: This review discusses the optimal blood pressure targets for patients with diabetes mellitus and summarizes the recommendations from different guidelines. A target blood pressure of <140/90 mm Hg is recommended, and <130/80 mm Hg for patients with diabetes mellitus who have high-risk clinical features.
DIABETES & METABOLISM JOURNAL
(2022)
Article
Geriatrics & Gerontology
Woo-Youn Kim, Yewon Suh, Young-Mi Ah, Jung-Yeon Choi, Kwang-il Kim, Ju-Yeun Lee
Summary: This cross-sectional study aims to evaluate the prevalence of medication-related admissions (MRAs) and their association with potentially inappropriate medications (PIMs) used by nursing home residents. The study found that approximately one-third of acute admissions may be MRAs. Interventions for optimal medication use among nursing home residents are necessary.
JOURNAL OF THE AMERICAN MEDICAL DIRECTORS ASSOCIATION
(2023)
Review
Peripheral Vascular Disease
Hack-Lyoung Kim, Eun Mi Lee, Shin Young Ahn, Kwang-il Kim, Hyeon Chang Kim, Ju Han Kim, Hae-Young Lee, Jang Hoon Lee, Jong-Moo Park, Eun Joo Cho, Sungha Park, Jinho Shin, Young-Kwon Kim
Summary: This review provides an update on the 2018 Korean Hypertension Society Guidelines for the management of hypertension. It highlights the importance of ambulatory and home blood pressure monitoring for diagnosis and treatment target determination. The updated guidelines recommend a target blood pressure below 130/80 mmHg for high-risk patients based on consensus and the SPRINT study. However, for conditions such as cerebral infarction and chronic kidney disease, as well as for elderly patients, the target blood pressure is generally set at <140/90 mmHg due to lack of evidence.
CLINICAL HYPERTENSION
(2023)
Review
Peripheral Vascular Disease
Hack-Lyoung Kim, Sang Min Park, In Jeong Cho, Yu-Mi Kim, Dae-Hee Kim, Sung Hye Kim, Kwang-Il Kim, Ki-Chul Sung, Sang-Hyun Ihm, Jinho Shin, Yoonjung Kim, Kyungwon Oh, Eun Mi Lee
Summary: This article describes the blood pressure measurement protocol and quality control program in the Korea National Health and Nutrition Examination Survey (KNHANES). KNHANES transitioned to mercury-free auscultatory devices for blood pressure measurement in 2020 and will adopt Microlife as the unified device from 2023. Under the new protocol, blood pressure measurements are conducted three times with specific conditions, and the average of the second and third readings is used as the representative value. The quality control program ensures the competence of examiners and involves weekly calibration and on-site evaluations.
CLINICAL HYPERTENSION
(2023)
Review
Peripheral Vascular Disease
Sang-Hyun Ihm, Jae-Hyeong Park, Jang Young Kim, Ju-Han Kim, Kwang-Il Kim, Eun Mi Lee, Hae-Young Lee, Sungha Park, Jinho Shin, Cheol-Ho Kim
Summary: Home blood pressure measurement (HBPM) is advantageous in diagnosing and treating various issues related to hypertension and has shown better predictive values in cardiovascular morbidity and mortality than office blood pressure monitoring.
CLINICAL HYPERTENSION
(2022)
Review
Peripheral Vascular Disease
Jinho Shin, Kwang-il Kim
Summary: As the elderly population grows rapidly in South Korea, managing hypertension becomes a major challenge due to the increasing proportion of elderly patients. The characteristics of elderly hypertension patients are complex and diverse, including variations in fitness level, white-coat effect, poor functional status, dependency in daily activities, orthostatic hypotension, and comorbidities. Recent studies have shown that intensive blood pressure control has greater benefits for elderly patients than previously thought. Defining the clinician's role in individualized treatment decisions is crucial for implementing guidelines based on these findings. Four components should be checked for individualized target blood pressure decisions in elderly hypertension patients, including functional status, absence of harm from the target blood pressure, absence of white-coat hypertension, and standing systolic blood pressure >= 110 mmHg without orthostatic symptoms. Screening for decreased organ perfusion risk should be done before starting intensive blood pressure control. The lowest target blood pressure among comorbidities should be prioritized when there are differences. Monitoring tolerability and adjusting dosage based on office and out-of-office blood pressure levels are important during intensive blood pressure lowering therapy. Clinical algorithms can help standardize and simplify the application of target blood pressure in the elderly.
CLINICAL HYPERTENSION
(2022)
Article
Engineering, Chemical
Ri Zhang, Shasha Zhang, Mengyan Ding
Summary: A thin liquid film method is proposed to evaluate sand erosion in annular flow. This method considers the direct interaction between the liquid film and gas core, as well as the entrainment and deposition of droplets. The erosion rate is calculated by considering the effects of liquid entrainment and particle velocity decay. The method is fully verified by comparing with experimental data.
Article
Engineering, Chemical
Yu Suo, Xianheng Su, Wenyuan He, Xiaofei Fu, Zhejun Pan
Summary: This research investigates the mechanical properties of sandstone-shale composite through orthogonal experimental method and discrete element simulation. The results show that different lithologies and thickness ratios can affect the strength and fracture mode of the composite rock samples.
Article
Engineering, Chemical
Maurizio Troiano, Andrea El Hassanin, Roberto Solimene, Alessia Teresa Silvestri, Fabrizio Scala, Antonino Squillace, Piero Salatino
Summary: This study investigates the potential of Fluidized Bed Finishing (FBF) for square flat AlSi10Mg specimens manufactured via Laser-Powder Bed Fusion (L-PBF) additive manufacturing technology. The results show that good finishing can be achieved using rotation-assisted tests, with a maximum reduction of surface roughness by 67%. Steel particles are found to be the most effective bed material.
Review
Engineering, Chemical
Ningbo Song, Wanzhong Yin, Jin Yao
Summary: Seawater's dissolved salts and minerals have various effects on the flotation process, including influencing the characteristics and behavior of flotation factors, as well as affecting the surface of sulfide minerals. In most cases, seawater has adverse effects on the flotation of sulfide minerals, but these effects can be mitigated by adjusting the reagents.
Article
Engineering, Chemical
Kaiqiao Wu, Shuxian Jiang, Victor Francia, Marc-Olivier Coppens
Summary: In rectangular and cylindrical annular fluidized beds, pulsating gas flow can create regular bubble patterns, overcoming challenges seen in conventional units. This study provides new opportunities for modularization of fluidized bed operations.
Article
Engineering, Chemical
Shuo Li, Huili Zhang, Jan Baeyens, Miao Yang, Zehao Li, Yimin Deng
Summary: The paper assesses the behavior of cohesive Geldart C-type particles when fluidized by air with the aid of vibration. It determines that mechanical vibration is a simple and effective method to improve the fluidity of cohesive particles during fluidization.
Article
Engineering, Chemical
Zhenfei Feng, Qingyuan Zhang, Shanpan Liang, Zhenzhou Li, Fangwen Guo, Jinxin Zhang, Ding Yuan
Summary: A new micro/mini-channel heat sink (MCHS) with a combined structure of longitudinal and transverse vortex generators is designed, using Al2O3 nanofluid as the working medium. The study explores the effects of transverse vortex generator shape and longitudinal vortex generator angle on the hydraulic and thermal characteristics, comprehensive performance, entropy generation, and exergy efficiency. The results show that the triangular transverse vortex generator improves the comprehensive performance and exergy efficiency. Combined with the longitudinal vortex generator, the MCHS achieves the best comprehensive performance, entropy generation, and exergy efficiency when the Reynolds number is 742.
Article
Engineering, Chemical
Kostas Giannis, Christoph Thon, Guoqing Yang, Arno Kwade, Carsten Schilde
Summary: This study presents a 3D convolutional neural network (3D-CNN) methodology for generating realistic 3D models of particles. The method trains on 2D projections of particle images to predict their 3D shapes, and evaluates the accuracy of the predictions using Fourier shape descriptors (FSDs). This methodology has wide applications in particle shape analysis.
Article
Engineering, Chemical
Zheng-qing Zhou, Lu-jia Chai, Yu-long Zhang, Ya-bin Wang, Ze-chen Du, Tian-yi Wang, Yu-zhe Liu
Summary: The dynamic oxidation and shell-breaking processes of aluminum nanoparticles (ANPs) during heating were studied using in situ transmission electron microscopy. The results revealed that the changes in shell thickness can be divided into three stages, and the active aluminum content of ANP decreased before shell-breaking.
Article
Engineering, Chemical
Fulei Chen, Huaqing Ma, Zihan Liu, Lianyong Zhou, Yongzhi Zhao
Summary: A particle breakage model based on the particle replacement scheme, using the polyhedral model to describe particles, is proposed in this work to accurately describe the breakage of a large number of particles. Additionally, a fast-cutting algorithm is proposed to reproduce the size distribution of progeny particles determined by the breakage model. The validation and simulation results show satisfactory accuracy, efficiency, and stability of the algorithm.
Review
Engineering, Chemical
Matteo Errigo, Christopher Windows-Yule, Massimiliano Materazzi, Dominik Werner, Paola Lettieri
Summary: Gas-solid fluidized-bed systems have advantages in terms of chemical reaction efficiency and temperature control, making them widely used in industrial applications. However, the design, scale-up, and optimization of these complex units are limited by the lack of deep physical understanding. Non-invasive and non-intrusive diagnostic techniques provide a way for researchers to study these systems without affecting the flow field or directly contacting the medium under study.
Article
Engineering, Chemical
Saeed Fateh, Mohammad Behshad Shafii, Mohammad Najafi, Cyrus Aghanajafi
Summary: Applying a magnetic field to ferrofluids alters their flow characteristics and enhances heat transfer. Through visualization and quantitative investigation, it is found that the magnetic field influences the flow patterns and velocity profiles, improving fluid mixing and vorticity magnitude.
Article
Engineering, Chemical
Lei Gao, Bingbing Wei, Xiaochuan Hu, Zaifeng Yao, Yiwen Fang, Xuejian Gao
Summary: In this study, a numerical model of sand triaxial test was established using discrete element software PFC3D, and an indoor triaxial test was conducted to calibrate the numerical model. The influence of microscopic parameters on the macroscopic mechanical response of sand was analyzed. The results showed that the friction coefficient had the greatest impact on the peak strength and residual strength of the sand's stress-strain curve, and it was positively correlated. The normal tangential stiffness ratio was negatively correlated, while the porosity and boundary flexibility stiffness had minimal influence on it.
Article
Engineering, Chemical
Xuan Liu, Jie Gong, Kai Jiang, Xiaojuan Lai, Yu Tian, Kang Zhang
Summary: This study aimed to improve the performance of lignite coal water slurries (CWSs) by synthesizing a series of three-arm amphiphilic block copolymers. By controlling the relative molecular weight, hydrophilic/hydrophobic ratio, and ionic group content, the apparent viscosity of CWSs was significantly reduced and the static stability was improved. Thermogravimetric testing and XPS analysis were conducted to reveal the mechanism behind the improved performance.
Article
Engineering, Chemical
Lanka Dinushke Weerasiri, Daniel Fabijanic, Subrat Das
Summary: Fluidization at low pressure offers significant benefits for the fine chemical industry. This study investigates the behavior of bubbles and bed expansion under low pressure conditions. It is found that lower pressure leads to larger bubbles, increased bubble quantity, and higher aspect ratio. The predictability is affected by the inhomogeneous fluidization, but low pressure fluidization can generate similar bubble sizes with lower fluidizing mass compared to atmospheric pressure.
