Accession Number : AD0881951

Title :   Study of the Basic Kinetics of Decomposition of MMH and MHF and the Effects of Impurities on Their Stability.

Descriptive Note : Quarterly rept. no. 7, 16 Dec 70-15 Mar 71,

Corporate Author : STANFORD RESEARCH INST MENLO PARK CA

Personal Author(s) : Ross, David S. ; Kirshen, Norman A. ; Hendry, Dale G.

Report Date : 15 MAR 1971

Pagination or Media Count : 18

Abstract : Monomethyl hydrazine (MMH) solutions of 0.0030 M Ni(II), Fe(II), and Cu(II) (about 200 ppm (wt/wt) of metal) were heated to 100C for periods up to 24 hr, and although the Cu solutions exhibited little if any increased decomposition over a sample without added metal, the Ni and Fe runs decomposed to the extent of 2.6 and 2.2%, respectively, over that period. The zero-valent metals were deposited in each case largely within 6 hr, and while there is no certainty that the ions themselves are catalytic, it is clear that the deposited metals are important catalysts. These results are very significant with regard to the long-term storage of MMH fuels, since the metal salts form a sediment which will both foul lines and valves and catalyze MMH decomposition. The presence of both the HNO3 and HCl salts of MMH in MMH greatly increases the rate of decomposition. Some initial results from the decomposition of MHF-3 at 175C are presented. (Author)

Descriptors :   *DECOMPOSITION), (*METHYL HYDRAZINES, (*LIQUID ROCKET PROPELLANTS, DECOMPOSITION), STORAGE, CATALYSIS, IRON, NICKEL, COPPER, THERMAL STABILITY, REACTION KINETICS, HYDROCHLORIC ACID, NITRIC ACID.

Subject Categories : Organic Chemistry
      Liquid Rocket Propellants

Distribution Statement : APPROVED FOR PUBLIC RELEASE