Results 61 to 70 of about 173,945 (302)

Heteroatom‐Engineering Promoted Co9S8 Bi‐functional Electrocatalyst for Hydrazine‐Assisted Hydrogen Production at Industrial Current Density

open access: yesAdvanced Functional Materials, EarlyView.
Fe and P co‐doped Co9S8 nanocorals (Fe, P‐Co9S8) are successfully synthesized by a heteroatom engineering strategy, which exhibit outstanding bifunctional electrocatalytic performance for both the hydrogen evolution reaction (HER) and hydrazine oxidation reaction (HzOR).
Yuying Meng   +8 more
wiley   +1 more source

Design and development of bubble-cap tray column for continuous transesterification plant in coconut-oil-based biodiesel production

open access: yesThe Indian Journal of Agricultural Sciences, 2016
A study was carried out on production of biodiesel from coconut oil using alkali catalyzed transesterification process by two different reactive distillation columns, viz. sieve tray and bubble-cap tray column.
P GNANASELVI, P SUBRAMANIAN
doaj   +1 more source

Bubble Size in a Cocurrent Fiber Slurry [PDF]

open access: yes, 2002
Bubble diameter measurements in a two-dimensional cocurrent bubble column are obtained using a gas−liquid−solid system in which the solid component is a cellulose fiber.
Heindel, Theodore, Heindel, Theodore
core   +3 more sources

Covalent Organic Frameworks for Photocatalytic CO2 Reduction: Metal Integration Principles, Strategies and Functions

open access: yesAdvanced Functional Materials, EarlyView.
Covalent organic frameworks (COFs) with metals have been recognized as versatile platforms for photocatalytic CO2 reduction (CO2PRR). Herein, an overview of metal integration strategies for COFs is systematically summarized. Regulatory mechanisms and structure–activity relationships between metal integration and COF‐based CO2PRR are emphasized.
Jie He   +5 more
wiley   +1 more source

IMAGE PROCESSING TO DETERMINE MASS TRANSFER COEFFICIENT FOR GAS BUBBLE

open access: yesمجلة النهرين للعلوم الهندسية, 2008
This paper suggests a simple system to study the hydrodynamics in a bubble column reactor and measuring gas-liquid specific interfacial area a, individual mass transfer coefficient kL, gas holdupG, flow regime, bubble size distribution, coalescence of
Naseer A. Al-Habobia, Aalaa A. Turkib
doaj  

Measurements of Heat Transfer Coefficients to Cylinders in Shallow Bubble Columns [PDF]

open access: yes, 2014
High heat transfer coefficients and large interfacial areas make bubble columns ideal for dehumidification. However, the effect of geometry on the heat transfer coefficients outside cooling coils in shallow bubble columns, such as those used in multi ...
Lienhard, John H., Tow, Emily W.
core   +1 more source

3D‐Printed Porous Hydroxyapatite Formed via Enzymatic Mineralization

open access: yesAdvanced Functional Materials, EarlyView.
Bone combines lightness, strength, and the ability to heal, inspiring new materials design. This work introduces a room‐temperature, enzyme‐mediated 3D printing method to create porous hydroxyapatite scaffolds. The process avoids energy‐intensive sintering, preserves bioactivity, and allows control over porosity and mineralization.
Francesca Bono   +6 more
wiley   +1 more source

Numerical simulations of liquid-gas-solid three-phase flows in microgravity [PDF]

open access: yes, 2012
Three-phase liquid-gas-solid flows under microgravity condition are studied. An Eulerian- Lagrangian computational model was developed and used in the simulations.
Fan L.-S.   +3 more
core   +4 more sources

Quasi‐Static to Supersonic Energy Absorption of Nanoarchitected Tubulanes and Schwarzites

open access: yesAdvanced Functional Materials, EarlyView.
Nanoarchitected energy‐absorptive Tubulanes exhibit record energy absorption under quasi‐static conditions and exceptional inelastic energy dissipation under 750 m s−1 ballistics impact, with high performance spanning strain rates of 12 orders of magnitude.
Peter Serles   +16 more
wiley   +1 more source

Estimation of Bubble Size and Gas Dispersion Property in Column Flotation

open access: yesSeparations
This study investigates bubble size measurements, bubble characteristics, and the relationship between key operating variables and gas dispersion properties in column flotation.
HyunSoo Kim, Chul-Hyun Park
doaj   +1 more source

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