Reductive burning of high-yield spent pulping liquors by the addition of pulverized coal

Journal Article · Thu Oct 01 04:00:00 EDT 1992 · Tappi; (United States)

OSTI ID:7047765

Sell, N J; Norman, J C ^[1]

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1. Natural and Applied Sciences, Univ. of Wisconsin-Green Bay, Green Bay, WI (United States)

This paper reports on the reductive burning of high-yield spent pulping liquors which can be accomplished by the addition of pulverized coal to increase the heat content and generate the proper reducing conditions. Samples from a 78%-yield sodium bisulfite pulping process employing a hardwood furnish were mixed with 10-50% pulveriized coal and burned at 950[degrees]C under reducing conditions in a box furnace. Even in these uncontrolled combustion conditions 76. 5% of the sulfur found in the soluble portion of the smelt was converted from lignousulfonates to useful sulfide ion. For the remainder of the sulfur, analyses determined it to be 19. 5% as sulfite ion, 3. 1% as thiosulfate ion, and 0.9% as sulfate ion.

• OSTI ID: 7047765
• Journal Information: Tappi; (United States), Journal Name: Tappi; (United States) Vol. 75:10; ISSN TAPPAP; ISSN 0039-8241
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000 -- Coal
Lignite
& Peat-- Combustion
09 BIOMASS FUELS
090900* -- Biomass Fuels-- Processing-- (1990-)
098000 -- Biomass Fuels-- Waste Management-- (1990-)
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320304 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Waste Heat Recovery & Utilization
CARBOHYDRATES
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
COMBUSTION
COMBUSTION PRODUCTS
ELEMENTS
ENERGY SOURCES
EXTRACTION
FOSSIL FUELS
FUELS
FURNACES
INDUSTRIAL WASTES
LIGNIN
LIQUID WASTES
MATERIALS
NONMETALS
ORGANIC COMPOUNDS
OXIDATION
POLYSACCHARIDES
PULVERIZED FUELS
REDUCTIVE EXTRACTION
SACCHARIDES
SEPARATION PROCESSES
SPENT LIQUORS
SULFUR
THERMOCHEMICAL PROCESSES
WASTE PRODUCT UTILIZATION
WASTES