G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 25/14 (2006.01) B01D 5/00 (2006.01) G01N 30/12 (2006.01) G01N 31/12 (2006.01) G01N 33/24 (2006.01)
Patent
CA 2074667
ABSTRACT OF THE DISCLOSURE Method and apparatus for determining the temperature resolved evolution of pyrolyzate from a sample of a macromolecular material undergoing pyrolysis. The apparatus comprises an oven for pyrolyzing the sample and a plurality of traps in parallel for trapping and holding pyrolyzate until the pyrolyzate can be analyzed for composition. As the pyrolysis temperature in the oven is continuously increased, pyrolyzate associated with a particular temperature band is directed to a particular predetermined trap. Each trap is separately disposed within its own cooling chamber so that each trap can be heated independently, allowing sequential analysis of the pyrolyzate for each temperature band. The results of the analyses are compiled to give product generation curves for the various products of pyrolysis. An apparatus for trapping pyrolyzate comprises a metal tube having an internal inert porous medium. The tube has a first electrode connected to the electrically resistive midpoint of the tube and a second and third electrode at each of the two ends of the tube. When a potential is applied between the first electrode and the second and third electrodes, the tube is resistively heated. An apparatus for maintaining an instrumentation valve and associated metal tubing at a constant, elevated temperature comprises a metallic block having a void in which the valve is disposed. Tubing passageways for the tubing run from the void to the outer perimeter of the block. The block has boreholes equidistantly distributed about the outer perimeter in which are disposed electrical heaters which heat the block, valve and tubing.
Powell John M.
Rierson Jon S.
Shively Ronald M.
Tang Yongchun
Womack Irving F. II
Chevron Research And Technology Company
Sim & Mcburney
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