Title

Research And Development On Advanced Graphite Materials. Volume XXXVI - Studies Of The Quality Of Petroleum Coke From A Pilot Scale Delayed Coker

Date

1964

Index Abstract

Contrails and DTIC truncated

Photo Quality

Incomplete

Report Number

WADD TR 61-72 Volume 36

Creator

Stout, C. F.

Biehl, J. A.

Janes, M.

Corporate Author

Advanced Materials Laboratory, Union Carbide Company

Laboratory

Air Force Materials Laboratory

Extent

122

NTRL Accession Number

AD607763

Identifier

AD0607763

AD0607763

Access Rights

OTS

Distribution Classification

1

Contract

AF 33(616)-6915

DoD Project

7350

DoD Task

735002

DTIC Record Exists

Yes

Distribution Change Authority Correspondence

None

Report Availability

Full text available

Date Issued

1964-08

Abstract

This report describes the design, construction, and operation of an experimental delayed coking unit for the conversion of petroleum residues to coke for use as the filler component in graphite for aerospace applications. The effect of changes in operating conditions of the experimental coker, e.g., time-temperature, pressure, and recycle ratio was investigated with respect to the physical properties of graphitized extruded and molded samples. Four basic charge stocks were studied: vacuum residuum, slurry (decant) oil, thermal tar, and a low sulfur thermal tar. Variations in raw coke bulk density are reported; in addition, data concerning kerosene density, ash, and sulfur content of the 1000°C calcined cokes are also included. Changes in bulk density, weight, and volume of the extruded and molded test samples resulting from the processing steps of baking and graphitizing are reported. The CTE (coefficient of thermal expansion), specific resistance, and flexural strength of the graphitized molded plugs in both the with- and across-grain directions are reported as well as the same properties for the with-grain direction of extruded rods.

High coke yields from cracked feed stocks were obtained by operating at high recycle ratios and higher-than-normal drum pressures. Thermally and catalytically-cracked charge stocks were coked to produce cokes yielding fabricated graphites exhibiting low CTE. Super-heated steam introduced into the hot oil stream between the furnace and the coking drum resulted in a marked effect on the coke produced from vacuum-residuum; the graphite formed using this coke as filler material was higher in CTE and more isotropic than conventional graphites, making it useful as a substrate for coatings.

Publisher

Wright-Patterson Air Force Base, OH : Air Force Materials Laboratory, Research and Technology Division, Air Force Systems Command

Distribution Conflict

No

Provenance

IIT

Lockheed Martin Missiles & Fire Control

Type

report

Subject

Refractory Materials

Graphite

Petroleum Products

Bonding

Processing

Manufacturing

Mechanical Properties

Binders

Temperature

Pressure

Furnaces

Tar

Thermal Expansion

Elastic Properties

Electrical Resistance

Extrusion

Sulfur

Density

Rocket Nozzles

Format

1 online resource