Effect of heating rate on char yield from forest fuels

by Ronald A. Susott

Publisher: Dept. of Agriculture, Forest Service, Intermountain Forest and Range Experiment Station in Ogden, Utah

Written in English
Published: Downloads: 992
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  • Char,
  • Forest fires,
  • Heat of combustion

Edition Notes

StatementRonald A. Susott
SeriesUSDA Forest Service research note INT -- 295, USDA Forest Service research note INT -- 295.
ContributionsIntermountain Forest and Range Experiment Station (Ogden, Utah), United States. Forest Service
The Physical Object
Pagination9 p. :
ID Numbers
Open LibraryOL25602707M

Lower and Higher Heating Values of Fuels You can use this calculator to obtain the heating value of a given mass or volume of hydrogen or other fuels, or to calculate the mass or volume given a certain heating value. Choose whether you want to convert to heating value . Higher and lower calorific values (=heating values) for some common fuels - coke, oil, wood, hydrogen and others. Sponsored Links. Energy content or calorific value is the same as the heat of combustion, and can be calculated from thermodynamical values, or measured in a suitable apparatus: A known amount of the fuel is burned at constant. Related Topics. Combustion - Boiler house topics - fuels like oil, gas, coal, wood - chimneys, safety valves, tanks - combustion efficiency; Related Documents. Biomass Energy - Biomass energy units and converting values ; Fuel Gases Heating Values - Fuel gases combustion and heating values - acetylene, blast furnace gas, ethane, biogas and more - Gross and Net values. A number of different pyrolysis techniques exist depending on temperature, speed of heating, and oxygen delivery [6, 7], resulting in different yields of biochar and co-products, “bio-oil” (with energy content value approx 55 percent that of diesel fuel by volume) and “syn-gas” (a mixture of hydrogen, carbon dioxide, carbon monoxide.

Table Average heat content of selected biomass fuels. Utility Poles. MSW = Municipal Solid Waste. Note: For detailed characteristics of biomass feedstocks, see the U.S. Department of Energy, Office of Energy Efficiency and Renewable Office of Energy Efficiency and Renewable Energy, website here. Heat of combustion Woodburning fireplace generating heat. Source: Francisco Belard The heat of combustion (ΔH c 0) is the energy released as heatwhen a substance undergoes complete combustion with oxygen. The chemical reaction for combustion is typically that of ahydrocarbon fuel reacting with oxygen derived from atmospheric air to form. COMBUSTION AND FUELS HEATING FUEL-OILS Heavy oils are residue products of crude oil distillation, their mixture with crude oil or oil fractions of distillation. According to Polish Standard PN-C there are two types of heating fuel-oils: •light oils (L1, L2), •heavy oils (C1,C2, C3).File Size: KB.   The research teams at South Dakota State University (SDSU) have proved the concept of controllable catalytic fast pyrolysis (CCFP) at lab scale. They are applying this concept to develop proprietary technologies that can efficiently convert lignocellulosic biomass into "advanced" liquid biofuels that are mixtures of liquid hydrocarbons and totally compatible to petroleum-derived hydrocarbons.

Mechanical fuels reduction treatments effects on fire behavior, fuel loads, and forest ecology Rate of spread Flame length. Osceola NF Fuels Treatment Effects Photo Guide- BURN TREATMENT p. 6 effect relative to the Mow units. Fuels Treatment Effects on Soil Carbon p. 13 These basic assumptions are as follows: • Heating value, 8, Btu per pound of dry wood e Moisture content, 45 percent (wet basis) • Heating value, as received, 4, Btu/lb or x 10 Btu/ton • Steam boiler efficiency, percent • Overall power plant efficiency, percent • Power plant heat rate, 12, Btu/kwhr • Plant. Types of heating fuels & other petroleum based fuels such as kerosene, diesel fuel, home heating oil: This article describes the different petroleum-based puels and their characteristics. Are some of these petroleum based fuels interchangeable? We compare the specific gravity and pour point of various oil fuels, kerosene, heating oil.   Approximate Heating Value of Common Fuels Natural Gas 1, Btu/cu ft , Btu/therm Propane 2, Btu/cu ft 92, Btu/gal Methane 1, Btu/cu ft Landfill gas Btu/cu ft Butane 3, Btu/cu ft , Btu/gal Metha Btu/gal Etha Btu/gal Fuel Oil Kerosene , Btu/gal.

Effect of heating rate on char yield from forest fuels by Ronald A. Susott Download PDF EPUB FB2

Get this from a library. Effect of heating rate on char yield from forest fuels. [Ronald A Susott; Intermountain Forest and Range Experiment Station (Ogden, Utah); United States. Forest Service.]. In the work reported here, both forest residue (FR) and torrefied forest residue (TFR) were devolatilized in a drop tube reactor at K at a heating rate greater than K/s.

The physical properties of parent fuel particles and their corresponding char particles were examined by using a scanning electron microscope and a granulometer. After the same milling and sieving process, the TFR Cited by: Zhao's results indicated that by increasing the heating rate starting at 1 °C min −1, char yield in- creased until it reached its maximum value at the heating rate of 5 °C min −1, then.

Steam gasification or pyrolysis of biomass was conducted at heating rates of 1, 10, and K s-1 using a thermobalance reactor. Three kinds of biomass samples (cellulose, lignin, and bagasse) were used. Time profiles of weight change of biomass samples during steam gasification and pyrolysis were measured at K.

Char obtained in steam gasification of lignin was analyzed with a scanning. Download Citation | Effect of heating rate and coal type on the yield of functional tar components | Pyrolysis with a rapid heating rate can be expected to achieve a higher yield of volatile.

Effect of heating rate on tar yield Figure 2 shows the volatile product yields of C-coal (see Table 2) as a representative example.

The tar yield at atmospheric pressure increased with increasing heating rate, while the gas yield (obtained from Y total gas = Y total by: 7.

In addition to the influence on char yield, it was noted that inorganics increase the nitrogen surface area of the char, an observation that becomes even more distinct after activation [15]. Char properties The effect of pyrolysis temperature and heating rate on char properties was examined in order to study the growth of pores as cellulose Cited by: Pyrolysis of solid fuels has been studied for coal and biomass extensively and it is well known that the kinetics and quality of pyrolysis products are severely affected, among other factors, by the severity of heating, in particular temperature and heating rate [1–3].

The presence of the large CO 2 concentrations typical of oxy-fuel. Effect of Heating Rate in Pyrolysis Process The rate of heating of the biomass particle has an important influence on yield and composition of the product. Rapid heating to a moderate temperature ( oC) yields higher volatiles and hence more liquid, while slower heating to Author: JFE Project.

The specific yield from pyrolysis is dependent on process condition, such as temperature, residence time, and heating rate. These parameters can be optimized to produce either energy or biochar. [14] Temperatures of – °C (– K) produce more char, whereas temperatures above °C ( K) favor the yield of liquid and gas fuel.

slow heating rate (slow pyrolysis) with a heating rate of °C/sec. Since the heating rate was slow, the yield product was formed predominantly the char. It can be illustrated in Figure 2 and 3. In the graphs, it can be seen that the mass and volume of char yield had.

The low-grade pyrolytic oil produced from pyrolysis of municipal plastic waste in a commercial rotary kiln reaction system cannot be an acceptable fuel oil due to its low quality.

Thus, the degradation of pyrolytic oil was conducted in a bench scale batch reactor, which was done by two experiment conditions of high heating rate (about 7 °C/min) and low heating rate (– °C/min) up Cited by: 5.

Pyrolysis • Thermal conversion (destruction) of organics in the absence of oxygen • In the biomass community, this commonly refers to lower temperature thermal processes producing liquids as the primary product • Possibility of chemical and food byproducts Gasification • Thermal conversion of organic materials at elevated temperature and reducing conditions to produce primarily File Size: 1MB.

Chapter in the book titled, Forest fire: control and use. [This publication is referenced in the "Synthesis of knowledge of extreme fire behavior: volume I for fire managers" (Werth et al ).] Online Link(s): Link to this document ( MB; pdf) Citation: Byram, George M.

Combustion of forest fuels. Pages In: Davis, K. P., editor. Similar results were also observed from the biomass of cottonseed cake when it underwent pyrolysis, and heating rate was increased from 5 to °C/min; an increase (9%) in production of bio-oil was observed.

However no change in yield of bio-oil was observed on further Cited by: 1. Burning rates of objects on fire determine safe egress times, heating rate of surrounding objects and flame spread rates. Radiative heat flux from fires to surrounding objects determines the possibility of ignition, flame spread and flashover.

Therefore, the knowledge of burning rates and radiative heat fluxes of flames has been. The higher heating value of five types of nonwoody biomass and their torrefaction char was predicted and compared with the experimental data obtained in this paper.

The correlation proposed in this paper and the ones suggested by previous researches were used for prediction. For prediction using proximate analysis data, the mass fraction of fixed carbon and volatile matter had a strong effect Cited by:   Its production highly depends on the rate and length of heating: sharp increases in temperature yield less char than gradual increases, since char production is dependent on low-temperature dehydration reactions.

The decomposition of lignin is known to make a significant contribution to the overall char yield (Browne ).Cited by: 1. Fuels and Combustion Bureau of Energy Efficiency 5 The Figure gives an illus-tration of the duplex system of arrangement of strainers.

The Table gives sizing of strainers at various locations. Pumping Heavy fuel oils are best pumped using positive displacement pumps, as File Size: KB. Wood pellets from our plant, located in Show Low, AZ, fuels more t homes nationwide. In addition, we also manufacture other products including horse bedding, densified logs, wax fire starters, loglettes and BBQ pellets—all sustainable products that come from the earth, and are good for the earth.

@article{osti_, title = {Simulating Biomass Fast Pyrolysis at the Single Particle Scale}, author = {Ciesielski, Peter and Wiggins, Gavin and Daw, C Stuart and Jakes, Joseph E.}, abstractNote = {Simulating fast pyrolysis at the scale of single particles allows for the investigation of the impacts of feedstock-specific parameters such as particle size, shape, and species of origin.

One great concern, however, is that char-coal, unlike fuelwood, is most often pro-duced from forest resources. Thus the use of forest biomass for charcoal making could still represent a threat to the future of the resources in local terms, especially in cer-tain situations with high demand (for in-stance the periphery of large urban zonesFile Size: KB.

Greenhouse Effect Global Warming Climate Change Actual world carbon dioxide emissions from fossil fuels, as shown in BP’s Statistical Review of World Energy.

Fitted line is expected trend in emissions, based on actual trend in emissions fromequal to about % per year. understanding of the cumulative watershed effects of fuel management. This document is the product of more than 20 authors and 40 reviewers including scientists from four Forest Service Research Stations and numerous universities.

Chapter outlines and contents were first reviewed at a workshop in April Cited by: Less than °C when the heating rate is slow, the main yield is biochar.

However at higher temperature that is more than °C when the heating rate is high then larger fraction of ash and gaseous products are produced. Bio‐oil can be produced applying intermediate Cited by: 3. Characteristics of Biomass as a Heating Fuel Introduction Biomass is a promising option for providing locally produced, renewable energy in Pennsylvania.

While it is not unusual for homes in the state to be heated with firewood, other forms of biomass fuel are not as common and commercial-scale use of biomass fuel is very limited. Correlations between heat release rate and gaseous by-product concentrations applied to the characterization of forest fuels I.

Fernández-Gómez1, J. Madrigal2, A. de Castro1, M. Guijarro2, J. Aranda1, C. Diez2, C. Hernando2 & F. López1 1LIR laboratory, Departamento de Física, Universidad Carlos III de Madrid, Spain. The effect of the heating rate on slow pyrolysis behaviour and physio-chemical properties of moso bamboo for biocrude oil production was studied by Chen et al.

The study discovered that changes in the heating rate resulted in large variations in the properties of the biocrude oil obtained. Chen et al.

() found that increasing the. Influence of Surrounding Conditions and Fuel Size on the Gasification Rate of Biomass Char in a Fluidized Bed Journal article, While the operational conditions of a fluidized bed are known to influence the fuel axial mixing, the effect of the resulting axial location of the fuel particles on the char gasification rate remains by: Torrefaction of biomass is of great interest at the present time, because of its potential to upgrade biomass into a fuel with improved properties.

This study considers the fundamentals of combustion of two biomass woods: short rotation willow coppice and eucalyptus and their torrefied counterparts.

Chars were prepared from the untreated and torrefied woods in a drop tube furnace at ° by:. Guidelines for Estimating Manitoba Heating Fuels Cost Comparison This guide is designed to provide planning information and a format for calculating and comparing the costs of various Manitoba heating fuels, including biomass.

The costs included in this budget were not obtained from a survey of commercial energy [email protected]{osti_, title = {The effect of clay catalyst on the chemical composition of bio-oil obtained by co-pyrolysis of cellulose and polyethylene}, author = {Solak, Agnieszka and Rutkowski, Piotr}, abstractNote = {Highlights: • Non-catalytic and catalytic fast pyrolysis of cellulose/polyethylene blend was carried out in a laboratory scale reactor.Charcoal is a lightweight black carbon residue produced by removing water and other volatile constituents from animal and plant materials.

Charcoal is usually produced by slow pyrolysis—the heating of wood or other organic materials in the absence of process is called charcoal finished charcoal consists largely of carbon.

The advantage of burning charcoal compared to.