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Title: Carbon-particle generator

Abstract

A method and apparatus whereby small carbon particles are made by pyrolysis of a mixture of acetylene carried in argon. The mixture is injected through a nozzle into a heated tube. A small amount of air is added to the mixture. In order to prevent carbon build-up at the nozzle, the nozzle tip is externally cooled. The tube is also elongated sufficiently to assure efficient pyrolysis at the desired flow rates. A key feature of the method is that the acetylene and argon, for example, are premixed in a dilute ratio, and such mixture is injected while cool to minimize the agglomeration of the particles, which produces carbon particles with desired optical properties for use as a solar radiant heat absorber.

Inventors:
Issue Date:
OSTI Identifier:
5848242
Application Number:
ON: DE83018041
Assignee:
ERA-08-053828; EDB-83-175839
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; ACETYLENE; PYROLYSIS; CARBON; CHEMICAL PREPARATION; ARGON; MIXTURES; NOZZLES; PARTICLES; SOLAR ABSORBERS; ALKYNES; CHEMICAL REACTIONS; DECOMPOSITION; DISPERSIONS; ELEMENTS; EQUIPMENT; FLUIDS; GASES; HYDROCARBONS; NONMETALS; ORGANIC COMPOUNDS; RARE GASES; SOLAR EQUIPMENT; SYNTHESIS; THERMOCHEMICAL PROCESSES; 141000* - Solar Collectors & Concentrators

Citation Formats

Hunt, A.J. Carbon-particle generator. United States: N. p., 1982. Web.
Hunt, A.J. Carbon-particle generator. United States.
Hunt, A.J. Wed . "Carbon-particle generator". United States.
@article{osti_5848242,
title = {Carbon-particle generator},
author = {Hunt, A.J.},
abstractNote = {A method and apparatus whereby small carbon particles are made by pyrolysis of a mixture of acetylene carried in argon. The mixture is injected through a nozzle into a heated tube. A small amount of air is added to the mixture. In order to prevent carbon build-up at the nozzle, the nozzle tip is externally cooled. The tube is also elongated sufficiently to assure efficient pyrolysis at the desired flow rates. A key feature of the method is that the acetylene and argon, for example, are premixed in a dilute ratio, and such mixture is injected while cool to minimize the agglomeration of the particles, which produces carbon particles with desired optical properties for use as a solar radiant heat absorber.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1982},
month = {9}
}