Preparation of ethanol-water mixtures for use in internal combustion engines and fuel cells

Journal Article · Wed Jun 01 04:00:00 EDT 1983 · Energy Prog.; (United States)

OSTI ID:5260940

Haertel, G H

Apart from energy requirement estimations on the conventional normal-pressure process for ethanol concentration, economy comparisons on the azeotropic and extractive distillation for ethanol purification can be found in the literature. The processes introduced in this paper are compared with processes described in literature. The problem is, on one hand the studies were made on laboratory-scale units, on the other hand values used were obtained from large-scale plants. While in the laboratory studies on heat recovery from the bottom product were taken into consideration, a cost-effective preparation of ethanol-water mixtures should be expected by the use of the entrainer solvenon 153 and the azeotropic converter isopropyl nitrate. Hence allowing a water content of 4.5 wt % in the blended alcohol, the overall-content of absolute alcohol in the mixture yields 11.1%. The energy costs per m/sup 3/ are almost unchanged at $22 after the addition of absolute alcohol provided by azeotropic distillation using isopropyl nitrate. If absolute alcohol provided by extractive distillation using solvenon 153 is added, costs will rise by about $1.30 per m/sup 3/. 3 references, 5 figures, 5 tables.

• Research Organization: Univ. of Erlangen-Nuernberg, West Germany
• OSTI ID: 5260940
• Journal Information: Energy Prog.; (United States), Journal Name: Energy Prog.; (United States) Vol. 3:2; ISSN ENPGD
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
090222* -- Alcohol Fuels-- Preparation from Wastes or Biomass-- (1976-1989)
ALCOHOL FUELS
ALCOHOLS
AZEOTROPE
BY-PRODUCTS
DIAGRAMS
DISPERSIONS
DISTILLATION
ENGINES
ETHANOL
ETHANOL FUELS
FUEL SUBSTITUTION
FUELS
HEAT ENGINES
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INTERNAL COMBUSTION ENGINES
MIXTURES
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHASE DIAGRAMS
PURIFICATION
SEPARATION PROCESSES
SYNTHETIC FUELS
WATER