Production of cooking briquettes from Maissade (Haiti) lignite. Feasibility study and preliminary plant design
A laboratory study was done to establish the technical feasibility of producing domestic cooking briquettes to be marketed in Haiti, from the Maissade lignite reserves of that country, which are high in both ash and sulfur and not yet mined. It was found that acceptable briquettes could be made from Maissade char, pyrolized and compacted with a molasses-lime binder and the addition of bagasse to improve strength and burning rate. Molasses, lime and bagasse are all produced in Haiti. Sodium nitrate was added to enhance ignition, and borax as a wetting and release agent. Standard, ''pillow-shaped'' briquettes were successfully produced on a standard, double roll briquetting machine. The recommended process sequence and equipment selection are virtually identical to that used to produce standard US barbecue briquettes from North Dakota lignite. The heating value of the Maissade briquettes is lower due to their high ash level, which may be acceptable if they can be produced at a cost per heating value comparable to wood charcoal, currently used in Haiti. The high sulfur content, mostly in organic form, presents no problem, since it is tied up after combustion as CaSO/sub 4/ by the unusually high calcium content of this lignite. Detailed analyses of Maissade lignite and its mineral components are included, as well as a preliminary plant design and capital cost estimate, for capacities of 10,000 and 50,000 metric tons per year, and for a smaller pilot plant.
- Research Organization:
- North Dakota Univ., Grand Forks (USA). Energy Research Center
- DOE Contract Number:
- FC21-83FE60181
- OSTI ID:
- 5932389
- Report Number(s):
- DOE/FE/60181-198; ON: DE86008701
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010401* -- Coal & Coal Products-- Carbonization-- (-1987)
AGRICULTURAL WASTES
ALKALINE EARTH METAL COMPOUNDS
ASH CONTENT
ASHES
BAGASSE
BINDERS
BRIQUETTING
BROWN COAL
CALCIUM COMPOUNDS
CALCIUM HYDROXIDES
CALORIFIC VALUE
CARBONACEOUS MATERIALS
CHARS
CHEMICAL ANALYSIS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COAL
COAL DEPOSITS
COHERENT SCATTERING
COMBUSTION PROPERTIES
DATA
DECOMPOSITION
DIAGRAMS
DIFFRACTION
ECONOMICS
ENERGY SOURCES
EQUIPMENT
EXPERIMENTAL DATA
FABRICATION
FEASIBILITY STUDIES
FLOWSHEETS
FOOD PROCESSING
FOSSIL FUELS
FUELS
GEOLOGIC DEPOSITS
GRAVIMETRIC ANALYSIS
GREATER ANTILLES
HAITI
HISPANIOLA
HYDROGEN COMPOUNDS
HYDROXIDES
INFORMATION
ISLANDS
LIGNITE
MANUFACTURERS
MATERIALS
MINERAL RESOURCES
MOLASSES
MOLDING
NONDESTRUCTIVE ANALYSIS
NUMERICAL DATA
ORGANIC WASTES
OXYGEN COMPOUNDS
PROCESSING
PYROLYSIS
PYROLYSIS PRODUCTS
QUANTITATIVE CHEMICAL ANALYSIS
RESIDUES
RESOURCES
SCATTERING
SULFUR CONTENT
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
THERMOCHEMICAL PROCESSES
WASTES
WEST INDIES
X-RAY DIFFRACTION
X-RAY EMISSION ANALYSIS
X-RAY FLUORESCENCE ANALYSIS