Jv
Authored
15 records found
Nature–Inspired self–cleaning surfaces
Mechanisms, modelling, and manufacturing
Nature-inspired self-cleaning surfaces have attracted considerable attention from both fundamental research and practical applications. This review adopts a chemical-engineering point of view and focuses on mechanisms, modelling, and manufacturing (M3) of nature-inspired self-cle
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Pressure and temperature are the most important state variables for monitoring physicochemical processes to detect deviations that might lead to explosions and to verify levels, flow rate, and solids/gas hold-up. Pressure fluctuations in multi-phase systems identify regime change
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Drug powders with tunable wettability by atomic and molecular layer deposition
From highly hydrophilic to superhydrophobic
The wettability of pharmaceuticals is a key physical property which influences their dissolution rate, dispersibility, flowability and solid-state stability. Here, we provide a platform of surface nanoengineering methods capable of tuning the wettability of drug powders from high
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Techno-economic Assessment of CO<sub>2</sub> Electrolysis
How Interdependencies between Model Variables Propagate Across Different Modeling Scales
The production of base chemicals by electrochemical conversion of captured CO2 has the potential to close the carbon cycle, thereby contributing to a future energy transition. With the feasibility of low-temperature electrochemical CO2 conversion demonstrated at lab scale, resear
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Time-resolved X-ray study of assisted fluidization of cohesive micron powder
On the role of mechanical vibration
Mechanical vibration has been broadly used to assist fluidization of cohesive powders, because of its capability to disrupt gas channels and agglomerates. However, the improvement reported in literature is mostly deduced from bulk response and ex-situ measurements, whereas the in
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Fluidization of fine lactose for dry powder inhalation
A comparison of assisting methods
Fluidization of cohesive pharmaceutical powders is difficult to achieve and typically requires the introduction of external forces. This study investigates the fluidization of the fine inhalation grade of lactose powders (size range from 0.1-20 μm) that are specifically developed
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On the fluidization of cohesive powders
Differences and similarities between micro- and nano-sized particle gas–solid fluidization
The fluidization of cohesive powders has been extensively researched over the years. When looking at literature on the fluidization of cohesive particles, one will often find papers concerned with only micro- or only nano-sized powders. It is, however, unclear whether they should
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Safe-by-design in engineering
An overview and comparative analysis of engineering disciplines
In this paper, we provide an overview of how Safe-by-Design is conceived and applied in practice in a large number of engineering disciplines. We discuss the differences, commonalities, and possibilities for mutual learning found in those practices and identify several ways of pu
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Enhancing colloid stability of polymer microspheres in water through SiO<sub>2</sub> coating
Effects of coating cycles and surface coverage
In this study, we investigated the wettability and agglomeration characteristics of polymer microspheres coated with low-temperature deposited SiO2 in a fluidized bed atomic layer deposition (ALD) setup. Surface characterization revealed the presence of a significant amount of de
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Fluidization dynamics of cohesive Geldart B particles. Part II
Pressure fluctuation analysis
The increase of inter-particle cohesive force greatly changes the fluidization dynamics, finally leading to the partial or complete failure of fluidization. However, few studies concern such transition process. This paper investigates the fluidization dynamics of Geldart B partic
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Safe-and-Sustainable-by-Design Framework Based on a Prospective Life Cycle Assessment
Lessons Learned from a Nano-Titanium Dioxide Case Study
Safe-and-sustainable-by-design (SSbD) is a concept that takes a systems approach by integrating safety, sustainability, and functionality throughout a product’s the life cycle. This paper proposes a framework based on a prospective life cycle assessment for early safety and susta
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Intriguing luminescence properties of (Ba, Sr)<sub>3</sub>Si<sub>6</sub>O<sub>9</sub>N<sub>4</sub>
Eu<sup>2+</sup> phosphors via modifying synthesis method and cation substitution
Synthesizing pure phase Ba3Si6O9N4 by the conventional solid-state reaction method is challenging because of easily formed secondary phase Ba3Si6O12N2 showing similar crystal structure. In this work, an alternative low temperature synthesis method is presented, and a series of gr
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Fluidization dynamics of cohesive Geldart B particles. Part I
X-ray tomography analysis
Due to the presence of inter-particle cohesive force, cohesive particles reveal totally different fluidization behaviors as compared to the non-cohesive system. This paper studies the fluidization dynamics of Geldart B particles with varying thermal-induced cohesive forces. Multi
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Although the gas-phase production of nanostructured solids has already been carried out in industry for decades, only in recent years has research interest in this topic begun to increase. Nevertheless, despite the remarkable scientific progress made recently, many long-establish
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From Single Atoms to Nanoparticles
Autocatalysis and Metal Aggregation in Atomic Layer Deposition of Pt on TiO<sub>2</sub> Nanopowder
A fundamental understanding of the interplay between ligand-removal kinetics and metal aggregation during the formation of platinum nanoparticles (NPs) in atomic layer deposition of Pt on TiO2 nanopowder using trimethyl(methylcyclo-pentadienyl)platinum(IV) as the precursor and O2
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Contributed
5 records found
A robust material for the production of microfluidic liquid-liquid extraction chips
Evaluation of a robust ALD coating to reduce irradiation-induced surface modifications on polymers and quartz for the usage of microfluidic liquid-liquid extraction chips
Microfluidic extraction is a promising alternative for existing extraction methods of radioisotopes due to the high surface-to-volume ratio. When assessing the compatibility of microfluidic material with the extraction system, there are three critical aspects—compatibility with o
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Urban Facades
Photocatalytic Building Envelope for Passive Remediation of Air Pollution
Air pollution is a worldwide prevailing issue affecting the health of human beings in urban areas requiring urgent measures to adopted. This graduation project targets on adoption of passive air remediation techniques that can be widely applied into urban areas. Within the passiv
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Study of Rheological Behaviour of Spherocylindrical Particle Suspension via CFD-DEM
Formulation of Stress-Closure for Industrial Fluidized Bed Simulation
While colloidal suspensions of non-spherical particles have been studied relatively extensively, granular suspensions of non-spherical particles are rarely studied. The rheological behaviour of elongated granular particles is therefore not well known. This thesis deals with suspe
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Aggregation Phenomena in Atomic Layer Deposition
Bridging Macro and Nano
Atomic layer deposition (ALD) is a gas-phase thin film technology that boasts atomic-level control over the amount of material being deposited. A great deal of research effort has been devoted to the exploitation of ALD precision for the synthesis of nanostructures other than thi
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Bridging intermittency
With iron electrodes
We have to overcome the intermittent nature of renewables to master the energy transition. Harvesting renewable electricity is only part of the solution. Energy storage is another part and the main challenge of our time. Only with efficient storage solutions can big industries sw
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