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Title: Rocket pollution reduction system

A system is provided for reducing the emissions of hydrochloric acid (HCl) from solid fuel rockets, especially during ground disposal. An aqueous solution of an alkali metal hydroxide is injected as a mist into the rocket chamber as the rocket fuel is burned. The reaction of the alkali metal with hydrogen chloride (HCl) produces a salt and thereby minimizes the presence of hydrochloric acid in the rocket exhaust. An injected neutralizing material which reduces hydrochloric acid, but which produces less thrust than an equal weight of rocket fuel, can be injected into an operating rocket which carries a payload high above the earth, with the injected material being injected only while the rocket is at a lower altitude when hydrochloric acid is most undesirable. The injected material can be produced by a small auxiliary rocket device whose exhaust is delivered directly to the main rocket chamber, and with the exhaust of the auxiliary rocket device including a high proportion of magnesium to react with the hydrochloric acid with minimal degradation of rocket performance. 4 figs.
Authors:
Publication Date:
OSTI Identifier:
6882275
Report Number(s):
US 5274998; A
PPN: US 7-911184
Resource Type:
Patent
Resource Relation:
Patent File Date: 6 Jul 1992
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; HYDROCHLORIC ACID; AIR POLLUTION CONTROL; POLLUTION CONTROL EQUIPMENT; DESIGN; ROCKETS; EXHAUST GASES; CHLORINE COMPOUNDS; CONTROL; EQUIPMENT; FLUIDS; GASEOUS WASTES; GASES; HALOGEN COMPOUNDS; HYDROGEN COMPOUNDS; INORGANIC ACIDS; POLLUTION CONTROL; WASTES 540120* -- Environment, Atmospheric-- Chemicals Monitoring & Transport-- (1990-)