Oxidized feeds

Plutonium metal is prepared by two methods--direct reduction of the oxide by calcium (DOR)U,2J, and reduction of PuF by calcium in our metal preparation line (MPL)(3) (see Figure 1). In the DOR process, the plutonium contenF of the reduction slag is so low that the slag can be sent to retrievable storage without further processing. Metal buttons that are produced are no purer than the oxide feed and/or the calcium chloride salt. Los Alamos purifies the buttons by electrorefin-ing(4i,5 ), yielding metal rings that are > 99.96 percent plutonium. 

That work led to a routine 700 gram scale oxide reduction process that has been in use since that time. Recent development work at LANL has increased the batch size to one kilogram of oxide feed. It appears that the ultimate limitation on DOR batch size will be from criticality safety constraints. 

Comparison of Purities of Oxide Feed, DOR Metal, and ER Metal Product, Run PMR 162 ... 

Element Oxide-Feed DOR Metal Product ER Product... 

Accidental contamination by aqueous ammonia of an ethylene oxide feed tank containing 22 t caused violent polymerisation which ruptured the tank and led to a devastating vapour cloud explosion [1,2], The close similarity to other base-catalysed incidents was stressed [3],... 

Accidental contamination of a large ethylene oxide feed-cylinder by reaction liquor containing trimethylamine caused the cylinder to explode 18 h later. Contamination was possible because of a faulty pressure gauge and suck-back of froth from above the liquid level [1], A similar incident had occurred previously [2],... 

Figure 13. Surface transients over Pt-alumina, starting with an oxidizing feed-stream (A) or with a reducing feedstream (B) (transmittance mode) at 723 K, 257 cmfi/s, 2,070 cm. 1, and 1 Hz switching frequency.

F = IF (DiskFeed flow rate of oxide, kg/min. Oxide feed shuts off on bursting. This can be deactivated to maintain feeding ... 

Oxidant The electrochemical reaction at the cathode involves the consumption of two moles CO2 per mole O2 (see Equation (6-2)), and this ratio provides the optimum cathode performance. The influence of the [C02]/[02] ratio on cathode performance is illustrated in Figure 6-7 (46). As this ratio decreases, the cathode performance decreases, and a limiting current is discernible. In the limit where no CO2 is present in the oxidant feed, the equilibrium involving the dissociation of carbonate ions becomes important. 

The term "cascaded" fuel cells is used here to describe a fuel cell system where the exhaust of a high-pressure fuel cell is utilized as an oxidant feed stream in a low-pressure fuel cell after passing through an expander. 

In order to improve the combustion performance of hybrid rockets, a new concept of a hybrid rocket is proposed the gas-hybrid rocket.l ] Fig. 14.23 shows a schemafic drawing of a gas-hybrid rocket composed of a combustion chamber, a gas generator, a Hquid oxidizer tank, and oxidizer feeding pipes and a valve. UnHke conventional hybrid rockets, the gas-hybrid rocket is a two-stage combusHon sys-... 

As shown in Fig. 14.24, a self-regulating oxidizer feeding mechanism is used to eliminate the liquid oxidizer pumping system. A flow of the pressurized fuel-rich gas generated in tlie primary combustor forces the oxidizer tank to supply the liquid oxidizer to the secondary combustor. Simultaneously, the fuel-rich gas is injected into the secondary combustor and reacts with the atomized oxidizer. The fuel-rich gas is injected from the primary combustor into the secondary combustor through the fuel gas injector under condihons of a choked gas flow. The pressure in the primary combustor is approximately double that in the secondary combustor. This system is termed a gas-pressurized system. 

VC Mason, M Rudemo, S Bech-Andersen. Hydrolysate preparation for amino acid determinations in feed constituents. 6. The influence of phenol and formic acid on the recovery of amino acids from oxidized feed proteins. Z Tierphysiol Tierernaehr Futtermittelkd 43 35-48, 1980. 

Steam reforming feeding gas and naphtha in Cases 1A, IB, and ID Partial oxidation feeding gas oil and SRC-11 oil in Case 1C. 

Resin-bead loading and calcination techniques have been used to produce all curium and americium oxide feed material... 

Eqn. (1.1) indicates that catalytic oxidation feed gas is always dry. This dryness... 

Volume% 02/volume% S02 ratios in industrial catalytic oxidation feed gas are in the range of 1 to 2, Table 7.2. This is 2 to 4 times the stoichiometric S02+Vi02- S03 requirement of 0.5 moles 02 per mole of S02. The excess 02 promotes rapid S02 oxidation. 

S02 strength in industrial catalytic oxidation feed gas varies from 8 volume% to 12 volume%, Table 7.2. The strength depends mainly on the preceding S02 production process. 

A small amount of Ar is also present in catalytic S02 oxidation feed gases. Like C02, it has no effect on equilibrium % S02 oxidized equations. 

Fuel feed temperature, K Oxidant feed temperature, K... 

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