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Removal of Flue Gases from Algae – Technical Report

October 15th, 2006 | No Comments | Posted in Algae-Flue gas-CO2-Sequestration

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Removal of Flue Gases Using Algae – Technical Report Abstract

Final technical report, September 1, 1992–August 31, 1993
Creator/Author Akin, C. ; Maka, A. ; Patel, S. ; Conrad, J. [Inst. of Gas Technology, Chicago, IL (United States)] ; Benemann, J.
Publication Date 1993 Dec 31
OSTI Identifier OSTI ID: 10132222; Legacy ID: DE94008039
Research Org Illinois Dept. of Energy and Natural Resources, Springfield, IL (United States)
Key words: COAL, LIGNITE, AND PEAT; 54 ENVIRONMENTAL SCIENCES; 20 FOSSIL-FUELED POWER PLANTS; FLUE GAS; AIR POLLUTION CONTROL; ALGAE; CATALYTIC EFFECTS; CARBON DIOXIDE; BIOCONVERSION; SCRUBBING; PROGRESS REPORT; FEASIBILITY STUDIES; BIOREACTORS; COST ESTIMATION; BENCH-SCALE EXPERIMENTS; PHOTOSYNTHESIS

Abstract

The objective of this research program is to determine the feasibility of the alga Botryococcus braunii as a biocatalyst for the photosynthetic conversion of flue gas CO{sub 2} to hydrocarbons. Free and immobilized cells of Botryococcus braunii were grown in aqueous medium supplemented with nitrogen, phosphorus and mineral nutrients. Air and CO{sub 2} enriched air [10% to 15% (V/V) CO{sub 2}] in the gas phase and 0.2% to 2% NaHCO{sub 3} in the liquid medium served as the carbon source. Growth and hydrocarbon formation characteristics of free and immobilized cultures of Botryococcus braunii were determined in bench-scale photobioreactors. Technical and economic feasibility of the conversion of flue gas CO{sub 2} to hydrocarbons by Botryococcus braunii culture systems was evaluated. In free cell systems, the hexane extractable oil productivity was about 15 to 37 grams of oil per 100 grams of cell dry weight. In immobilized cell systems, the oil production ranged between 5% and 47% at different immobilization systems and immobilized surface locations, with an average of 19% of cell biomass dry weight. The feasibility and economic evaluation estimated the cost of oil produced from flue gas CO{sub 2} by algae to range between $45 and $75 per barrel assuming that a hydrocarbon yield of about 50% of the biomass weight is achievable and a credit of $60 per ton of carbon removed is available. A future research program leading to development of a multistage process, consisting of closed systems for heavy inoculum buildup followed by lower cost open systems for oil production is recommended.
Country of Publication United States
Language English

Abstract taken from here:

Full PDF File available here: Format Size: 33 p.; Format: Adobe PDF Document with Extractable Text; availability OSTI as DE94008039; Paper copy available at OSTI.

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