Delta p instrument for oxidation measurement

Details Delta p instrument for oxidation measurement Delta p instrument for oxidation measurement

G - Physics

01

N

73/115

G01N 33/22 (2006.01) G01N 7/16 (2006.01)

Patent

CA 1247883

Abstract An apparatus for measuring .DELTA.P in coal is described which comprises: (a) a plurality of closed metallic coal sample cups; (b) a gas manifold flow connected to each of said sample cups by way of a separate electric valve and said manifold being connected to a source of methane by way of electric valve means and connectable to a source of vacuum by way of electric valve means; (c) a pressure transducer connected to said manifold and adapted to mea- sure absolute gas pressure in the manifold, and (d) pro- cessing means adapted to actuate said valves to sequen- tially (1) introduce vacuum to evacuate the manifold and one or more sample cups; (2) introduce methane gas to the manifold and saturate one or more coal samples therewith; (3) close sample cup valves and evacuate the manifold; and (4) selectively open individual sample cup valves. The processing means is also adapted to measure and record pressure in the manifold at short time intervals to indi- cate the pressure rise in the manifold with passage of time, thereby obtaining the .DELTA.P index for the coal sample.

491137

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