Combustion carbon monoxide

Carbon monoxide combustion appliances cooking ETS. headaches, flu-ike symptoms, nausea, fatigue, chest tightness cardiovascular diseases death in high concentration. 

To permit controlled carbon monoxide combustion without combustion promotor, the carbon monoxide and oxygen must be held in intimate contact with the catalyst at a temperature, residence time and bed density to allow adequate carbon monoxide burning to proceed, while the heat evolved is absorbed by the catalyst, and to protect regenerator internals and downstream equipment from the excessive temperature associated with afterburning. 

Catalyst falling to the bottom of the separator is passed by an airlift to a regenerator unit. Here, the air burns carbon deposited on the catalyst and reheats the catalyst before its return to the riser pipe. In some systems, and to prevent overheating in the regenerator, the oxidation of carbon proceeds only to carbon monoxide and carbon monoxide combustion to carbon dioxide occurs in a second regenerator. 

A carbon particle is large enough so that the burning rate is diffusion-controlled. In one case the carbon monoxide leaving the surface bums to carbon dioxide in the gas phase in another, no further carbon monoxide combustion takes place. Is the burning rate of the particle different in the two cases If so, which is larger Explain. 

Acetaldehyde, secondary alcohols, alkalis, and alkallnes, ammonia, carbon monoxide, combustible materials, ethers, flammable materials, hydrocarbons, metals, phosphorous, polymers... 

Hess s law provides a useful means of calculating energy changes that are difficult to measure directly. For instance, it is impossible to measure directly the enthalpy for the combustion of carbon to form carbon monoxide. Combustion of 1 mol of carbon with 0.5 mol of O2 produces both CO and CO2, leaving some carbon unreacted. However, solid carbon and carbon monoxide can both be completely burned in O2 to produce CO2. We can therefore use the enthalpy changes of these reactions to calculate the heat of combustion of carbon. 

Platinum catalyst for carbon monoxide combustion in regenerator. 

Early attempts by Mobil to minimize after-burning in TCC imits led to the addition of chromium oxide to their Durabead catalyst to oxidize carbon monoxide, but this uirfortunately also decreased cracking selectivity. Mobil then introduced a platinum/alumina additive in 1976 to control carbon monoxide combustion in the regenerator. Platinum was added either as a component of the cracking catalyst or in separate particles. Complete combustion of carbon monoxide was achieved by adding the equivalent of 0.5 ppm of platinum to the catalyst inventory. 

The use of carbon monoxide combustion additives and sulfur transfer additives help to reduce coke formation and sulfur emissions. 

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