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Biomass acetone

Figure 10.1 illustrates one of the processing schemes that might be used for separating the various components in hydrocarbon-containing biomass. Acetone extraction removes the polyphenols, glycerides, and sterols, and benzene extraction or extraction with another nonpolar solvent removes the hydrocarbons. If the biomass species in question contained low concentrations of the nonhydrocarbon components, exclusive of the carbohydrate and protein fractions, direct extraction of the hydrocarbons with a nonpolar solvent might be preferred. [Pg.350]

We can see that for type 1 processes, high growth rate is obligately linked to a high rate of product formation. Indeed, this is the case for all products produced by a fermentative mode of metabolism, eg ethanol, lactic add, acetone. Chemostat studies have shown that for most aerobic processes when growth is limited by some nutrient other than the carbon source, the yield of product decreases with increase in spedfic growth rate (p or D p = dilution rate (D) in chemostat culture). Conversely, both the biomass yield and the spedfic rate of substrate utilisation (qs g substrate g biomass-1 h-1) increase with spedfic growth rate. [Pg.45]

Different routes for converting biomass into chemicals are possible. Fermentation of starches or sugars yields ethanol, which can be converted into ethylene. Other chemicals that can be produced from ethanol are acetaldehyde and butadiene. Other fermentation routes yield acetone/butanol (e.g., in South Africa). Submerged aerobic fermentation leads to citric acid, gluconic acid and special polysaccharides, giving access to new biopolymers such as polyester from poly-lactic acid, or polyester with a bio-based polyol and fossil acid, e.g., biopolymers . [Pg.396]

Commodity Chemicals acetic acid, acetone, butanol, ethanol, many other products from biomass conversion processes. [Pg.3]

Next, an experiment was run in which 2.5 g/L of sodium butyrate was added to P2 medium to investigate whether it could be converted to butanol. A control experiment was run containing P2 medium. A separate control experiment was run before each experiment. This is essential because biomass accumulation in the reactor changes with time, thus affecting performance of the reactor (5). The reactor produced 4.77 g/L of total ABE, of which acetone, butanol, and ethanol were 1.51,3.14, and 0.12 g/L, respectively (Table 1). It resulted in a total ABE productivity of 1.53 g/(L-h) and a glucose utilization of 29.4% of that available in the feed of 59.1 g/L. The acid concentration in the effluent was 1.56 g/L. Following this, P2 medium was supplemented with sodium butyrate and the experiment was conducted at the same dilution rate. The reactor produced 1.55 g/L of acetone, 4.04 g/L of butanol, and 0.11 g/L of ethanol, for a total ABE concentration of 5.70 g/L, compared with 4.77 g/L in the control experiment. The productivity was 1.82 g/(L-h), compared with 1.53 g/(L-h) for the control experiment. These experiments suggested that butyrate was used by the culture to produce additional butanol. Note that 0.9 g/L of butanol was produced from 1.65 g/L of butyrate (2.5 g/L in feed, 0.85 g/L in effluent). The yield calculations do not include the amount of butyrate that was utilized by the culture. [Pg.719]

The Fe203 catalysts treated with tellurate ion are effective for the selective conversion of ethanol to acetone (183). The synthesis of acetone from ethanol (2EtOH + H20 - Me2CO + C02 + 4H2) is of interest from the point of view of using biomass as a chemical resource. [Pg.201]

A case study and forecast for the explicit production of bulk chemicals from biomass in the region of Rotterdam has recently been provided by Van Haveren et al. [46], As technologies for the conversion of, for example, ethanol, glycerol, and sugars to glycols, iso-propanol, and acetone are well known and readily available, and as the prices for feedstock are well below the selling prices for the named products, there is a clear short-term potential for these bulk chemicals (Table 2.2.2). [Pg.105]

Biomass species Acetone extract Benzene extract ... [Pg.353]

Holzinger, R., C. Warneke, A. Hansel, A. Jordan, W. Lindinger, D.H. Scharffe, G. Schade, and P. J. Crutzen, Biomass burning as a source of formaldehyde, acetaldehyde, methanol, acetone, acetonitrile, and hydrogen cyanide. Geophys Res Lett 26, 1161,... [Pg.427]


See other pages where Biomass acetone is mentioned: [Pg.177]    [Pg.27]    [Pg.249]    [Pg.174]    [Pg.91]    [Pg.295]    [Pg.52]    [Pg.69]    [Pg.101]    [Pg.226]    [Pg.247]    [Pg.528]    [Pg.657]    [Pg.27]    [Pg.249]    [Pg.5]    [Pg.720]    [Pg.887]    [Pg.154]    [Pg.189]    [Pg.328]    [Pg.352]    [Pg.390]    [Pg.420]    [Pg.421]    [Pg.465]    [Pg.495]    [Pg.1144]    [Pg.1378]    [Pg.413]    [Pg.325]    [Pg.96]    [Pg.100]    [Pg.181]    [Pg.22]    [Pg.30]   
See also in sourсe #XX -- [ Pg.52 , Pg.69 , Pg.70 , Pg.101 ]




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