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What occurs in a lime kiln?
A lime kiln is a kiln used to produce quicklime by the calcination of limestone (calcium carbonate). The chemical equation for this reaction is:CaCO3 + heat → CaO + CO2 This reaction takes place at 900°C (at which temperature the partial pressure of CO2 is 1 atmosphere), but a temperature around 1000°C (at which temperature the partial pressure of CO2 is 3.8 atmospheres) is usually used to make the reaction proceed quickly. Excessive temperature is avoided because it produces unreactive, "dead-burned" lime.
How do you know that the air breathed out contains carbon dioxide gas?
You can test it with the Lime Water test. If there is carbon dioxide in your breath then the Lime Water should turn cloudy.
Why is hot air blown into lime kiln?
so that limestone can decompose to form CO2 and CaO
What is migration for Rotary Kiln?
Migration in the context of a rotary kiln refers to the movement of materials within the kiln during the heating and processing of raw materials, such as cement or lime. This movement can affect the efficiency of the kiln, as it influences the temperature distribution, material residence time, and overall reaction kinetics. Proper management of material migration is crucial to ensure uniform heating, optimize product quality, and reduce energy consumption. Monitoring and adjusting operational parameters can help mitigate issues related to improper migration.
Spurite ring formation in cement kiln?
carbonate or spurite ring are form through CO2 resorption into the freshing formed free lime or even through belite recorbonation in the kiln. these rings are harder and exibit the same chemistry as regular clinker, the presence of spurite a minral with composition CA2SO4 CACO3, When the carbonate in the spurite is replaced with sulfer, the new material is called sulfated spurite. Spurite ring basicaly form when ever the partial press of CO2 above the bed of material is high enough to invert the calcining reaction increase the ground silica rich rawmixes and free lime does not have sufficient lime in the calcining zone to react with silica therefore increasing the chances for spurite deposit in the kiln. Rajesh Shukla Chief Genral Manager Production Manikgarh Cement gadchandur
What is the word equation for the endothermic reaction which occurs in lime kiln?
Calcium carbonate + heat= Calcium oxide + carbon dioxide is the word equation for the endothermic reaction which occurs in lime kiln.
Why is carbon dioxide created in a lime kiln?
In a lime kiln, carbon dioxide is created as a byproduct of the chemical reaction that occurs when limestone (calcium carbonate) is heated to high temperatures to produce quicklime (calcium oxide). The carbon dioxide is released as a gas during this process, leaving behind the calcium oxide.
What happened to the carbon dioxide the animals produced while in the chamber?
The carbon dioxide was absorbed by the soda lime in the bottom of the chamber.
When you mix hydrochloric acid to calcium carbonate and transfer the gas to mix with lime water what is the lime water testing for?
The lime water is testing for the presence of carbon dioxide gas. When hydrochloric acid reacts with calcium carbonate, carbon dioxide gas is produced. This gas is then passed through the lime water, which will turn milky/cloudy if carbon dioxide is present.
Lime water goes cloudy when reacted with carbon dioxide which substance is produced?
calcium carbonate
How is quick lime made?
Limestone, calcium carbonate, is heated until it glows. It will give off carbon dioxide and change into calcium oxide. Calcium oxide is called quicklime because it hisses and swells up when a drop of water is added to it, just as if it was alive. "Quick" used to be used to indicate that something was living, so in this case it would be alive-lime, or quicklime.
Purpose of lime water with marble chip?
Lime water is used in an experiment to test if carbon dioxide is produced from acid reacting with a marble chip. If you see a calcium carbonate in your lime water at the end of the reaction, you will know that it produced the gas, carbon dioxide.
When methane is burned in a lime kiln why are the wast gages carbon dioxide and nitrogen?
When methane is burned in a lime kiln, the waste gases are carbon dioxide and nitrogen because methane (CH4) reacts with oxygen (O2) to produce carbon dioxide (CO2) and water vapor (H2O) during combustion. Nitrogen is also present in the air and is not directly involved in the combustion process, so it remains as a waste gas in the form of nitrogen (N2).
If air was not allowed to stream through the kiln how would the production of lime be affected and why is this?
The stream of air carries away the carbon dioxide formed in the decomposition. If it were allowed to build up in the kiln, it would start to react again with the newly formed calcium oxide, and an equilibrium would be set up instead of the reaction's going to completion.
What is lime water an indicator for?
Limewater is an indicator for Carbon Dioxide
What happens when acid react with compounds made of carbonate?
When acids react with carbonates, carbon dioxide is produced. You can test this by waiting for the chemical reaction to take place and then using a bung to insert the gas into lime water!
What occurs in a lime kiln?
A lime kiln is a kiln used to produce quicklime by the calcination of limestone (calcium carbonate). The chemical equation for this reaction is:CaCO3 + heat → CaO + CO2 This reaction takes place at 900°C (at which temperature the partial pressure of CO2 is 1 atmosphere), but a temperature around 1000°C (at which temperature the partial pressure of CO2 is 3.8 atmospheres) is usually used to make the reaction proceed quickly. Excessive temperature is avoided because it produces unreactive, "dead-burned" lime.
