Browsing Institutt for energi og prosessteknikk by Journals "Energy & Fuels"
Now showing items 1-18 of 18
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Ammonia in Dual-Fueled Internal Combustion Engines: Impact on NOx, N2O, and Soot Formation
(Peer reviewed; Journal article, 2023)The combustion of ammonia in internal combustion engines (ICE) releases nitrogen-related exhaust emissions. Numerous studies have shown that the increased formation of nitrous oxide (N2O) may offset ammonia’s carbon-free ... -
An Alternative Approach for the Estimation of Biochar Yields
(Journal article; Peer reviewed, 2018)In this study, a novel approach for the determination of the solid mass yield from slow pyrolysis based on a comparison of the volatile matter contents of feedstock and char is presented. The approach was tested with ... -
Bed Model for Grate-Fired Furnaces: Computational Fluid Dynamics Modeling and Comparison to Experiments
(Peer reviewed; Journal article, 2022)A detailed but still central processing unit (CPU)-efficient bed model for grate-fired combustion of biomass and waste is developed. Simulations of wood chip combustion are performed, and the results are compared to ... -
Carbon Capture Utilization and Storage in Methanol Production Using a Dry Reforming-Based Chemical Looping Technology
(Peer reviewed; Journal article, 2022)This further investigates the concept of gas switching dry reforming (GSDR) that efficiently converts the two major greenhouse gases (CO2 and CH4) into a valuable product (syngas) for gas-to-liquid (GTL) syntheses. The ... -
CO2 Gasification of Chars Prepared by Fast and Slow Pyrolysis from Wood and Forest Residue: A Kinetic Study
(Journal article; Peer reviewed, 2017)The CO2 gasification of chars was investigated by thermogravimetric analysis (TGA). The chars were prepared from spruce and its forest residue. Prior to the gasification, the raw materials were pelletized and pulverized. ... -
Combustion of Thermally Thick Wood Particles: A Study on the Influence of Wood Particle Size on the Combustion Behavior
(Journal article; Peer reviewed, 2018)A one-dimensional (1D) comprehensive combustion model for thermally thick wet wood particles, which is also applicable for studying large wood logs, is developed. The model describes drying, devolatilization, and char ... -
Comprehensive Compositional Study of Torrefied Wood and Herbaceous Materials by Chemical Analysis and Thermoanalytical Methods
(Journal article; Peer reviewed, 2016)In this work, the torrefaction of three biomass materials, black locust wood, wheat, and rape straw, was studied at various temperatures: 200, 225, 250, 275, and 300 °C. The thermal stability and formation of the decomposition ... -
Drying of Thermally Thick Wood Particles: A Study of the Numerical Efficiency, Accuracy, and Stability of Common Drying Models
(Journal article; Peer reviewed, 2017)The primary focus of this paper is on studying different numerical models for drying of wet wood particles. More specifically, the advantages and disadvantages of the models, with respect to numerical efficiency, stability, ... -
Eulerian–Lagrangian Simulation of Biomass Gasification Behavior in a High-Temperature Entrained-Flow Reactor
(Journal article; Peer reviewed, 2014)In this paper, a multiscale Eulerian–Lagrangian CFD model based on OpenFOAM has been constructed, which takes into account heat and mass transfer, pyrolysis, homogeneous and heterogeneous reactions, radiation, as well as ... -
Experimental Study on Charcoal Production from Woody Biomass
(Journal article; Peer reviewed, 2016)In the present work, effects of process conditions on char and fixed carbon yields from four woody biomasses were studied. The influence of the particle size, sample mass, and pressure on experimental values of char and ... -
Investigation on Ash Slagging Characteristics during Combustion of Biomass Pellets and Effect of Additives
(Journal article; Peer reviewed, 2017)This study reports a systematic investigation into ash slagging behavior during combustion of barley straw and barley husk pellets with or without additives in a residential pellet burner. The slagging tendencies of the ... -
Numerical Study of Hydrogen Inhibition of Char Gasification Using Detailed Hetero- and Homogeneous Chemical Kinetics
(Journal article; Peer reviewed, 2016)It has been known for a long time that hydrogen in the gas phase tends to inhibit gasification of char at low and intermediate temperatures. At higher temperatures, however, there are indications that hydrogen may speed ... -
Optical Measurements of In-Flame Soot in Compression-Ignited Methyl Ester Flames
(Journal article; Peer reviewed, 2019)This study investigates in-flame sooting characteristics of biodiesel surrogates in compression-ignited spray flames. The aim of the study is to produce reliable experimental data on in-flame soot for validation of kinetic ... -
Pyrolysis of Untreated and Various Torrefied Stem Wood, Stump, and Bark of Norway Spruce
(Journal article; Peer reviewed, 2019)The effect of torrefaction severity (temperature and residence time) was studied on the thermal decomposition of different parts of Norway spruce (stem wood, stump, and bark). The volatile content of the torrefied samples ... -
Stochastic Reactor-Based Fuel Bed Model for Grate Furnaces
(Peer reviewed; Journal article, 2020)Biomass devolatilization and incineration in grate-fired plants are characterized by heterogeneous fuel mixtures, often incompletely mixed, dynamical processes in the fuel bed and on the particle scale, as well as heterogeneous ... -
Surrogate Reaction Mechanism for Waste Incineration and Pollutant Formation
(Peer reviewed; Journal article, 2021)The incineration of municipal solid waste (MSW) is an attractive technology to generate thermal energy and reduce landfill waste volume. To optimize primary measures to ensure low emission formation during combustion, ... -
The techno-economics of biocarbon production processes under Norwegian conditions
(Journal article; Peer reviewed, 2017)This work deals with techno-economic analysis studies in the context of production of various grade biocarbon for utilization as reducing agents in metallurgical industries. A detailed process design was developed for wood ... -
Thermal Decomposition Kinetics of Wood and Bark and their Torrefied Products
(Journal article; Peer reviewed, 2017)The pyrolysis kinetics of Norway spruce, its bark, and their torrefied products was studied. Thermogravimetry (TGA) was employed with linear and stepwise heating programs. Altogether 36 TGA experiments were evaluated ...