Article
Engineering, Chemical
Josephine Oppotsch, Matthias Steinke, Miriam Fritsch, Fritz -Herbert Heinsius, Thomas Held, Nikoline Hilse, Viktor Scherer, Ulrich Wiedner
Summary: This work is the second part of a simulation study on processing densely packed and moving granular assemblies using PEPT. A cost-effective PET-like detector system is being developed to overcome the high cost of PET scanners commonly used for PEPT. Monte Carlo simulations and Geant4 software were used to study the spatial resolution of different scenarios, and it was found that oversampling and iteration improved the resolution significantly.
Article
Engineering, Chemical
Qingjin Zhang, Liangliang Fu, Guangwen Xu, Dingrong Bai
Summary: This study comprehensively analyzes the temperature effect on the minimum fluidization velocity (Umf) in fluidized-bed reactors. The analysis reveals the influence of temperature on Umf is determined by the relative importance of hydrodynamic forces and interparticle forces, which result in changes in gas properties, bed voidage, and physiochemical characteristics of particles. An equation is derived to predict the temperature influences on Umf under broad temperature conditions.
Article
Engineering, Chemical
Lian Duan, Zhixun Xia, Yunchao Feng, Binbin Chen, Likun Ma, Jianxin Hu
Summary: In this study, boron-magnesium agglomerates with varying mass ratios were prepared and the combustion process of these agglomerates under different oxygen-rich concentrations were investigated. The results showed that when the mass fraction of magnesium powder in boron-magnesium agglomerates exceeded a certain threshold, a transient flameout process occurred. This process is affected by the magnesium content of the agglomerate and the oxygen concentration in the ambient atmosphere.
Article
Engineering, Chemical
Zhipeng Wang, Tong Zhu, Youzhao Wang, Song Yang, Feng Ma, Xu Li
Summary: This study improves the efficiency of in-situ soil remediation by designing and optimizing a three-stage soil remediation auger, providing reference for the design of in-situ homogenization equipment.
Article
Engineering, Chemical
Salma A. Nouh, Kuzilati Kushaari, Lau Kok Keong, Shafirah Samsuri
Summary: This study experimentally estimated the mechanical properties of urea granules and simulated the particle coating process using discrete element method. The results showed that the coating film thickness is proportional to the rotation speed and the spray rate, filling ratio, and spray angle significantly affect the coating uniformity.
Review
Engineering, Chemical
Ackmez Mudhoo, Marta Otero, Khim Hoong Chu
Summary: Pore network, pore connectivity, and effective adsorbate pore diffusivity are crucial in mass transport modeling of aqueous adsorption. Adsorbent tortuosity and tortuosity factor concepts are related to these adsorbent features and hinder intra-adsorbent adsorbate transport. Understanding the complex connections among adsorbate chemistry, adsorbent chemistry, adsorbent porosity, pore shape, size, and tortuosity is important for water treatment specialists. This review provides insights into adsorbent tortuosity for aqueous adsorption systems and highlights the need for further research on dynamic attributes.
Article
Engineering, Chemical
Ali Momeni, Barry Clarke, Yong Sheng, Ali Hassanpour
Summary: Applying the discrete element method (DEM) in soil mechanics can provide detailed information on the particle scale and help understand the macro-mechanical behavior of soils. This paper focuses on the representation and impact of lateral boundary conditions on the behavior of soil samples in biaxial tests. The results show that lateral boundary conditions play a significant role in the fabric properties, shear band characteristics, and stress-strain behavior of granular soils.
Article
Engineering, Chemical
Muhammad Shahid Ansari, Ratna Kumar Annabattula, Sathyan Subbiah
Summary: In this study, the influence of external mechanical vibration on the flow of powdered particles is investigated. The results show that increasing the vibration amplitude can increase the mass flow rate, but there is an optimal vibration amplitude. Additionally, the study examines the effects of vibration frequency, hopper, and particle dimension on the flow characteristics.
Article
Engineering, Chemical
Zhuwei Gao, Chengxin Li, Jingjing He, Zhuo Wang, Xinyu Qi, Lan He, Shihao Wang, Zhongxin Liu
Summary: This study aims to analyze the coking process and propose an effective method for the reutilization of fluid catalytic cracking (FCC) coke block. The main components of FCC coke blocks are carbon, oxygen, and aluminum. The physical cause of coking is the condensation of oil-gas-entrained catalyst particles and their heavy components, while the chemical factor is the dehydrogenation condensation reaction of oil-gas heavy components. The membrane prepared by powdered coke has excellent photothermal conversion ability and can have industrial application potential.
Article
Engineering, Chemical
Zhan Zhao, Yan Zhang, Fang Qin, Mingzhi Jin
Summary: The kinetic model is used to optimize the structure and performance of vibration screening devices. This study establishes a biological neurodynamic equation and neural connections to simulate the material distribution during vibration screening. By comparing different methods of material distribution, the optimum coefficients of the biological neural network (BNN) model are determined and predicted using adaptive neuro-fuzzy inference systems (ANFIS).
Article
Engineering, Chemical
Boris I. Kharisov, Oxana V. Kharissova, Lucy T. Gonzalez, Yolanda Pena Mendez, Igor E. Uflyand, Idalia Gomez de la Fuente
Summary: Hydroxyapatite (HA) composites with carbon allotropes and nanocarbons are rapidly developing in materials chemistry, especially for medical applications. These composites can be synthesized using various methods and exhibit biocompatibility and hemocompatibility, making them suitable for bone regeneration and wastewater treatment.
Article
Engineering, Chemical
Fangling Hu, Liangliang Fu, Qingjin Zhang, Guangwen Xu, Dingrong Bai
Summary: This study proposes a method for synthesizing high-quality forsterite using abundant boron mud waste through high-temperature thermochemical reactions. The reaction can be completed rapidly at low temperatures due to the high reactivity of fine raw powder materials. The synthesized forsterite products exhibit high densification, well-developed grains, and an activation energy of 165.5 kJ/mol in the temperature range of 1100-1500°C. This study provides a low-cost method for producing forsterite and an efficient solution for treating solid waste.
Article
Engineering, Chemical
Lixia Hou, Chunxiao Qu, Min Su, Zhihan Liang, Qi Hao
Summary: This study investigates the impact of polymer modified Fe3O4 nanoparticles on lysozyme (Lys) crystallization under different conditions, using functionalized Fe3O4 magnetic nanoparticles (Polymer C@Fe3O4) as nucleation agents. The findings show that the surface charge density of Polymer C@Fe3O4 is highest at a modification mass ratio of 8:3 for Fe3O4 to Polymer C. By adding 15% of the PolymerC@Fe3O4 prepared from Fe3O4 with an average particle size of 150 nm, magnetic core lysozyme (M-Lys) crystals with an average particle size of 11.08 mm, narrow size distribution, and regular morphology were obtained with a yield of 82.42% within 60 min.
Article
Engineering, Chemical
Bingchuan Cheng, Haibo Li, Guangming Pan, Runhuai Deng, Yu'an Gong, Shujun Xu, Kun Zhou, Zhuo Zheng
Summary: The study focuses on the plugging mechanism of swelling particle grouting material in high pressure and large-flow burst water within karst pipelines. A precise constitutive model and a coupling calculation method were established to describe the diffusion process and spatiotemporal heterogeneity of viscosity. A Computational Fluid Dynamics-Discrete Element Method (CFD-DEM) coupling model was developed to investigate the interaction between particle swelling and flow field changes.
Article
Engineering, Chemical
Yingfeng Sun, Shuaipeng Zhu, Fei Xie, Chujian Han, Yixin Zhao, Zetian Zhang
Summary: Coal seam CO2 sequestration is an important solution to global warming. This study investigates the differences in pore structure evolution between deep and shallow coal during gas adsorption using real-time synchrotron radiation small-angle X-ray scattering (SAXS) observation. It is found that coal compositions and stress history play significant roles in the average pore diameter and pore surface fractal dimension evolution differences. Different types of coal deformation, inner-swelling and outer swelling, exist during gas adsorption. The dominance of inner-swelling in deep coal is induced by higher ash contents and results in a decrease in average pore diameter.
Review
Engineering, Chemical
Ruiqi Xie, Zhihui Zhao, Xiong Tong, Xian Xie, Qiang Song, Peiqiang Fan
Summary: This review provides a systematic summary of the types and characteristics of clay-type lithium resources, as well as the research status of lithium extraction from these resources. The difficulties in the development and utilization of clay-type lithium ore are discussed, and future research orientations are proposed.
Article
Engineering, Chemical
Alexander A. Fedorets, Eduard E. Kolmakov, Leonid A. Dombrovsky
Summary: Droplet clusters levitating over heated water surface can be used as microreactors for microbiological experiments, and a new optical method is proposed to precisely measure the levitation height and velocity of droplets.
Review
Engineering, Chemical
Yaqi Yao, Jinming Xu, Yanqiang Huang, Tao Zhang
Summary: This review summarizes the synthesis methods and applications of carbon nanospheres (CNS) in various fields. The four main methods of CNS synthesis are described, followed by expounding their applications in energy storage, adsorption, biological medicine, and catalysis. Finally, insights on the development and design of CNS are presented.
Article
Engineering, Chemical
Sayantan Mukherjee, Sylwia Wcislik, Purna Chandra Mishra, Paritosh Chaudhuri
Summary: According to the data from the Scopus database, hundreds of new research papers are published in the field of nanofluids every year. Nanofluids have attracted increasing attention due to their significant improvement in heat transfer and energy efficiency. However, there are several fundamental problems related to the determination of their physical properties, production, and economic use. This review paper provides insights into many of these problems and proposes possible solutions, which is the strength of the work.
Article
Engineering, Chemical
Qiaoqiao Lan, Xuying Zhang, Jiaming Liang, Wei Wang, Leili Lv, Jiamin He, Zefeng Wang, Chunsheng Qu
Summary: In this study, multifunctional polyeugenol-based nanoparticles with remarkable antioxidant and antibacterial properties were designed and synthesized. Through various analyses and tests, the structure and properties of these nanoparticles, as well as their potential applications in drug delivery and antimicrobial activities, were demonstrated. This study presented an innovative concept for the development of antioxidant and antibacterial multifunctional polymer materials derived from eugenol.
