Production of activated carbon in a dual-pulse-jet engine system.
Belter-JW; Docktor-L; Ellman-RC
U S Pat 3 668 145 1972 Jun; :
Activated carbon is prepared by treating lignite with the hot gases generated within the tail pipes of a dual-pulse-jet combustion system. Thus, two identical pulse-jets were arranged with tail pipes opposite each other and 6 in apart. Lignite was supplied at 200 No./H (sic) (ed: probably should be lb/h) to one of the tail pipes after preheating combustion was established with propane supplied at 15 psig. Activated carbon was collected at a rate of 70 lb/h. Lignite samples treated in this manner gave activated carbon containing 0.3 pct h2o and 28 pct metal- and ash-free volatile matter. Similar results were obtained when h2o-containing char was slurried in water and then introduced into the pulse jets.
U.S. Pat. 3,668,145; June 6, 1972; Chem. Abstr. 77:77,655Q