Research and development of an advanced process for conversion of coal to synthetic gasoline and other distillate motor fuels. Annual report, June 1978-May 1979

Technical Report · Sun Jul 01 00:00:00 EDT 1979

DOI:https://doi.org/10.2172/5604301· OSTI ID:5604301

Succop, D. C.; Wynne, F. E.

This program was redirected to a study of more urgently needed design criteria for hydroliquefaction slurry heating. A review of heater design criteria indicated that data were needed on heat transfer coefficients, tube wall temperatures, slurry viscosities, slurry residence times and solvent characteristics. In addition, it is known that reactions occur within the slurry heaters but the extent of these reactions and the effect of heater design on the reactions is not clearly defined in terms of heat requirements, physical property changes and the effect of heater design on subsequent reaction in the downstream reactors and their design. Also, heater operating limits related to fouling are needed and fouling tests conducted with coal/petroleum resid slurries indicated that these limiting factors could be examined by similar tests. In reviewing the design and operation of coal hydroliquefaction slurry heaters, the first thing that became apparent was that almost all slurries are made with recycle solvent. A second feature common to most processes is the addition of hydrogen to the coal/solvent slurry during preheating. A third feature common to three widely different processes appeared to be a critical heater tube in-wall temperature of 450 to 460/sup 0/C (840 to 860/sup 0/F) beyond which serious fouling occurs. An independent experimental heater study to examine design limits appeared to be needed and was undertaken. The effects of changing heater tube diameter, operating pressure, outlet temperature, hydrogen:slurry ratio and velocity were generally in the directions expected. The effect of reducing the slurry coal concentration from 30.1 to 19.5 weight percent was slight. Heat transfer was studied by examining the effects of heater operating variables on the overall heat transfer coefficient, heat flux, inside wall coefficient and inside wall temperature.

• Research Organization: Gulf Research and Development Co., Pittsburgh, PA (USA)
• DOE Contract Number: EX-76-C-01-1800
• OSTI ID: 5604301
• Report Number(s): FE-1800-39(Vol.1)
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL LIQUEFACTION PLANTS
RESIDUES
FUEL SLURRIES
HEATING
GASOLINE
PRODUCTION
HEAT EXCHANGERS
FOULING
HEATERS
DESIGN
RESIDUAL FUELS
COKING
COKE
EXPERIMENTAL DATA
GRAPHS
HEAT TRANSFER
HYDROGEN PRODUCTION
PARAMETRIC ANALYSIS
TABLES
CARBONIZATION
CHEMICAL REACTIONS
DATA
DATA FORMS
DECOMPOSITION
DISPERSIONS
ENERGY TRANSFER
FUEL OILS
FUELS
INDUSTRIAL PLANTS
INFORMATION
MIXTURES
NUMERICAL DATA
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
SLURRIES
SUSPENSIONS
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction