Xiaoke Ku
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View article: Characterization and kinetic analysis of lignocellulosic and algal biochar combustion
Characterization and kinetic analysis of lignocellulosic and algal biochar combustion Open
The combustion characteristics of biochar obtained from barley straw (BS) and brown algae (BA) are explored. Four different heating rates are utilized to determine the respective activation energies. A master plot analysis is used to ident…
View article: Catalytic pyrolysis of lignocellulosic and algal biomass using <scp>NaOH</scp> as a catalyst
Catalytic pyrolysis of lignocellulosic and algal biomass using <span>NaOH</span> as a catalyst Open
In this work, the pyrolysis of barley straw (BS) and brown algae (BA) mixed with NaOH as a catalyst was compared. Four different catalyst‐to‐biomass mass ratios (i.e., 6:100, 8:100, 10:100, and 12:100) and five pyrolysis heating rates were…
View article: Heat and mass transfer of water flow in graphene nanochannels: effect of pressure and interfacial interaction
Heat and mass transfer of water flow in graphene nanochannels: effect of pressure and interfacial interaction Open
The low-resistance transport of water within graphene nanochannels makes it promising for electronic cooling applications.
View article: Pyrolysis Characteristics and Determination of Kinetic and Thermodynamic Parameters of Raw and Torrefied Chinese Fir
Pyrolysis Characteristics and Determination of Kinetic and Thermodynamic Parameters of Raw and Torrefied Chinese Fir Open
Torrefaction influences the structural and physicochemical properties of biomass, thus further altering its thermal degradation behavior. In this study, the pyrolysis characteristics, reaction kinetics, and thermodynamic parameters of raw …
View article: Lock-in phenomenon in the wake flow past an oscillating circular nano-cylinder
Lock-in phenomenon in the wake flow past an oscillating circular nano-cylinder Open
In this paper, the lock-in/synchronization phenomenon in the wake flow around an oscillating nano-cylinder is studied with molecular dynamics simulation. The results show that the lock-in valley of the velocity fluctuation also occurs in n…
View article: Pyrolysis Mechanism of Wheat Straw Based on ReaxFF Molecular Dynamics Simulations
Pyrolysis Mechanism of Wheat Straw Based on ReaxFF Molecular Dynamics Simulations Open
Biomass has played an increasingly important role in the consumption of energy worldwide because of its renewability and carbon-neutral property. In this work, the pyrolysis mechanism of wheat straw is explored using reactive force field m…
View article: Molecular dynamics simulation of flow around a circular nano-cylinder
Molecular dynamics simulation of flow around a circular nano-cylinder Open
In this study, the wake flow around a circular nano-cylinder is numerically investigated with molecular dynamics simulation to reveal the micro/nano size effect on the wake flow. The cavitation occurring when Reynolds number (Re) > 101 can…
View article: Combustion Behavior of Algal Biochars Obtained at Different Pyrolysis Heating Rates
Combustion Behavior of Algal Biochars Obtained at Different Pyrolysis Heating Rates Open
In this work, the combustion performance of Chlorella vulgaris (CV), Dunaliella salina (DS), and Haematococcus pluvialis (HP) algal biochars was analyzed based on the multicomponent method. The biochars were obtained via nonisothermal pyro…
View article: Migration and Alignment of Three Interacting Particles in Poiseuille Flow of Giesekus Fluids
Migration and Alignment of Three Interacting Particles in Poiseuille Flow of Giesekus Fluids Open
Effect of rheological property on the migration and alignment of three interacting particles in Poiseuille flow of Giesekus fluids is studied with the direct-forcing fictitious domain method for the Weissenberg number (Wi) ranging from 0.1…
View article: High-temperature pyrolysis modeling of a thermally thick biomass particle based on an MD-derived tar cracking model
High-temperature pyrolysis modeling of a thermally thick biomass particle based on an MD-derived tar cracking model Open
Biomass pyrolysis in the thermally thick regime is an important thermochemical phenomenon encountered in many different types of reactors. In this paper, a particle-resolved algorithm for thermally thick biomass particle during high-temper…
View article: CFD-DEM Simulation of Biomass Pyrolysis in Fluidized-Bed Reactor with a Multistep Kinetic Scheme
CFD-DEM Simulation of Biomass Pyrolysis in Fluidized-Bed Reactor with a Multistep Kinetic Scheme Open
The pyrolysis of biomass in a fluidized-bed reactor is studied by a combination of a CFD-DEM algorithm and a multistep kinetic scheme, where fluid dynamics, heat and mass transfer, particle collisions, and the detailed thermochemical conve…
View article: Influence of non-Newtonian power law rheology on inertial migration of particles in channel flow
Influence of non-Newtonian power law rheology on inertial migration of particles in channel flow Open
In this paper, the inertial migration of particles in the channel flow of power-law fluid is numerically investigated. The effects of the power-law index (n), Reynolds number (Re), blockage ratio (k), and channel aspect ratio (AR) on the i…
View article: Shear-induced autorotation of freely rotatable cylinder in a channel flow at moderate Reynolds number
Shear-induced autorotation of freely rotatable cylinder in a channel flow at moderate Reynolds number Open
Flow past a center-pinned freely rotatable cylinder asymmetrically confined in a two-dimensional channel is simulated with the lattice Boltzmann method for a range of Reynolds number 0.1 ≤ Re ≤ 200, eccentricity ratio 0/8 ≤ ε ≤ 7/8, and bl…
View article: CFD Simulation of Devolatilization of Biomass with Shrinkage Effect
CFD Simulation of Devolatilization of Biomass with Shrinkage Effect Open
In the present work, a computational fluid dynamics (CFD) model is used to assess devolatilization of biomass under high-temperature condition. The CFD code is based on a multiscale Eulerian–Lagrangian solver previously developed in the fr…
View article: Detailed operational mapping of a grate fired Biomass combustion plant for improved combustion process control
Detailed operational mapping of a grate fired Biomass combustion plant for improved combustion process control Open
Biomass combustion plants in Norway are facing stricter emission regulations and lower profitability, mostly due to low energy prices. Hence, performance optimization through improved combustion process control and/or retrofitting becomes …
View article: CFD Simulation of Industrial-Sized Biomass Furnace
CFD Simulation of Industrial-Sized Biomass Furnace Open
In this study, a CFD model is developed to simulate a large-scale grate fired biomass furnace. The model is constructed with the open source software package OpenFOAM, which consists two separate solvers: a packed bed solver and a freeboar…
View article: Operational Mapping of a Grate Fired Biomass Combustion Plant for Improved Process Control
Operational Mapping of a Grate Fired Biomass Combustion Plant for Improved Process Control Open
Norwegian bioenergy plants are facing stricter regulations and low energy prices. Process optimization for improved control can be interesting to look into in order to increase the profit margins of existing plants. Increased process knowl…