Mild gasification technology development process: Task 3, Bench-scale char upgrading study, February 1988--November 1990

Technical Report · Sat Dec 01 04:00:00 EST 1990

DOI:https://doi.org/10.2172/5919683· OSTI ID:5919683

Carty, R H; Onischak, M; Babu, S P; Knight, R A; Wootten, J M; Duthie, R G

The overall objective of this program is to develop mild gasification technology and co-product utilization. The objective of Task 3 was to investigate the necessary steps for upgrading the mild gasification char into potential high-market-value solid products. Recommendations of the Task 1 market survey section formed the basis for selecting three value-added solid products from mild gasification char: form coke, smokeless fuel, and activated adsorbent char. The formation and testing for the form coke co-product involved an evaluation of its briquette strength and reactivity. The measured tensile strength and reactivity of the form coke sample briquettes were in the range of commercial coke, and development tests on a larger scale are recommended. The reaction rate of the form coke carbon with carbon dioxide at 1825{degree}F was measured using a standard procedure. A smokeless fuel briquette with limestone added to control sulfur can be made from mild gasification char in a simple manner. Test results have shown that briquettes with limestone have a heating value comparable to other solid fuels and the limestone can retain up to 88% of the sulfur during combustion in a simple bench-scale combustion test, almost all of it as a stable calcium sulfate. Adsorbent chars were prepared with a standard steam activation procedure and tested for a variety of pertinent property and performance values. Such adsorbents may be better suited for use in some areas, such as the adsorption of low-molecular-weight substances, because of the smaller pore sizes measured in the char. 5 refs., 17 figs., 6 tabs.

• Research Organization: Institute of Gas Technology, Chicago, IL (USA)
• Sponsoring Organization: DOE; USDOE, Washington, DC (USA)
• DOE Contract Number: AC21-87MC24266
• OSTI ID: 5919683
• Report Number(s): DOE/MC/24266-2978; ON: DE91002058
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404 -- Coal
Lignite
& Peat-- Gasification
010500* -- Coal
Lignite
& Peat-- Products & By-Products
ACTIVATED CARBON
ACTIVATION ENERGY
ADDITIVES
ADSORBENTS
AIR POLLUTION CONTROL
BRIQUETS
BRIQUETTING
BY-PRODUCTS
CALORIFIC VALUE
CARBON
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CARBONATE ROCKS
CARBONIZATION
CHALCOGENIDES
CHARS
CHEMICAL ACTIVATION
CHEMICAL REACTIONS
COAL GASIFICATION
COKE
COKING
COMBUSTION PROPERTIES
CONTROL
DECOMPOSITION
ELEMENTS
ENERGY
FABRICATION
FORMED COKE PROCESSES
FUELS
GASIFICATION
LIMESTONE
MARKET
MECHANICAL PROPERTIES
MOLDING
NONMETALS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POROSITY
PYROLYSIS PRODUCTS
ROCKS
SEDIMENTARY ROCKS
SOLID FUELS
SULFUR
SYNTHESIS
TENSILE PROPERTIES
THERMOCHEMICAL PROCESSES
USES