Combustion of carbon monoxide

StUl another ore preparation is the nodulizing process where the ore is heated in a rotary kiln to incipient fusion. The tumbling action in the kiln causes the phosphate ore to cohere and form spheroidal agglomerates. Combustion of carbon monoxide from the furnaces is used along with supplemental fuel to supply heat to 1300—1500°C. A boring bar is used near the kiln discharge to aid in breaking up the fused ore. The material is then cooled, cmshed, and screened to the appropriate size for furnace feed. 

Afterburn is the combustion of carbon monoxide (CO) to carbon dioxide (COj) in the dilute phase or in the cyclones of the regenerator. 

Wet—open combustion. Excess air is admitted to the off-gas collection system, allowing combustion of carbon monoxide prior to high-energy wet scrubbing for air pollution control. 

One of the conclusions deduced from the thermochemical cycle 2 in Table V, for instance, is that in the course of the catalytic combustion of carbon monoxide at 30°C, the most reactive surface sites of gallium-doped nickel oxide are inhibited by the reaction product, carbon dioxide. This conclusion ought to be verified directly by the calorimetric study of the reaction. Small doses of the stoichiometric reaction mixture (CO + IO2) were therefore introduced successively in the calorimetric cell of a Calvet microcalorimeter containing a freshly prepared sample of gallium-doped... 

The combustion of carbon monoxide yields carbon dioxide. The volume of oxygen gas needed to produce 22 grams of carbon dioxide at STP is... 

It is not true, however, that volumes must be conserved in reactions involving gases. The complete combustion of carbon monoxide is a case in point ... 

Analogous experiments with mixtures of identical combustion temperature containing various excess amounts of carbon monoxide showed that the flame velocity is proportional to [CO ]1/2, where [CO ] is the carbon monoxide concentration in the reaction zone. From this it follows that the chemical reaction in a flame is first order in carbon monoxide. The role of water in the combustion of carbon monoxide is well known. Analysis of available data shows that the flame velocity is proportional to [H20]1//2, i.e., the reaction is first order in water vapor content. The influence on combustion of such flegmatizers as CC14 may be ascribed to the binding of hydrogen by halogen with the formation of a molecule of HC1, which is dissociable only with difficulty. However, the latest experiments by Kokochashvili in our laboratory show that the influence of the... 

Barskii G. A., Zeldovich Ya. B., Orlova L. I., Yudin F. E. Teplota akti-vatsii goreniia okisi ugleroda [The Activation Heat of Combustion of Carbon Monoxide].—Nauch.-tekhn. otchet In-ta khim. fiziki AN USSR (1941). 

Direct calculation shows that for a mixture of 22% CO, 78% air, 1.8% H20, the introduction of 1% CC14 even raises the combustion temperature from 2079 to 2092°K (the difference, however, is close to the calculation error). In the combustion products at the theoretical temperature of 2080° K, once complete chemical equilibrium has been established, more than 90% of the hydrogen turns out to be bonded to chlorine in the form of HC1. Apparently it is precisely in the hydrogen bonding, necessary for combustion of carbon monoxide, that the flegmatizing role of CC14 lies. The action of CC14... 

Haber [3] investigated the formation of nitric oxide during the combustion of carbon monoxide and came to the conclusion that charged particles— electrons and ions—have an important catalytic effect on the reaction in the flame. 

Bone and co-workers [4] studied the formation of nitric oxide in the combustion of carbon monoxide and arrived at some very strange results, e.g., yields of nitric oxide exceeding equilibrium values, a sharply negative influence of water vapor and hydrogen, etc. Bone concluded that the reaction of nitrogen with oxygen is caused by activation of the nitrogen by radiation from the carbon monoxide flame. 

In the above example of the combustion of carbon monoxide the time found experimentally in which the pressure reaches a maximum is 0.4 sec the combustion time of a single element according to an estimate based on the theory of flame propagation [11, 12], is less than 0.001 sec. The loss of heat in 0.4 sec is considerable the increase in pressure takes place so slowly that the state of the gas does not change adiabatically upon compression, and despite the compression each element cools after combustion. However, in 0.001 sec the loss of heat is negligibly small and each element in burning does attain the temperature Tp. 

This is the mam reaction in the inner couc of peach-blossom tmt. It is followed, in the outer cone, by the combustion of carbon monoxide, and the greenish fringe alluded to above is attributed to the presence of small quantities of oxides of nitrogen. 

From the time of Lavoisier until 1880, the combustion of carbon monoxide was regarded as a simple oxidation process completely represented by the equation... 

THE EXPLOSION LIMITS AND THE SLOW COMBUSTION OF CARBON MONOXIDE-OXYGEN MIXTURES... 

These results are of primary interest here in showing the nature of the reaction when conducted in the presence of certain catalysts. In the actual practice of preferential combustion of carbon monoxide in the presence of large excesses of hydrogen and water vapor extremely selective catalysts are necessary, and it would be interesting to compare the absorptive capacities of some that have been used. 

Whether the units given for reactants (or products) are moles, grams, liters (for gases), or some other units, we use moles to calculate the amount of product formed in a reaction. This approach is called the mole method, which means simply that the stoichiometric coefficients in a chemical equation can be interpreted as the number of moles of each substance. For example, the combustion of carbon monoxide in air produces carbon dioxide ... 

The three-way exhaust catalytic converter is used to complete the combustion of carbon monoxide and unburned fuel elements and to remove the NO and N02 produced during combustion. The primary components of the catalytic converter are the catalyst and its physical support. The catalyst is composed of a high-surface-area support that incorporates the primary catalytically active materials, typically mixtures of one or more of platinum, palladium, or rhodium (precious group metals, PGMs). The catalyst also contains promoters that improve the efficiency and stability of the PGM. Of these, the most important is cerium oxide, a... 

Calculate the enthalpy of combustion of carbon monoxide from the enthalpies of formation of carbon monoxide and carbon dioxide. Calculate the enthalpy of the following reaction given the enthalpies of combustion in equations I to 3 below ... 

The enthalpy of combustion of solid carbon to form carbon dioxide is -393.7 kj/mol carbon, and the enthalpy of combustion of carbon monoxide to form carbon dioxide is -283.3 kJ/mol CO. Using these data calculate the change in enthalpy for the reaction... 

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