Can calcium carbonate slurry be used directly to absorb hydrogen chloride gas produced as a by-product of fertilizers in order to produce calcium chloride?
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Can calcium carbonate slurry be used directly to absorb hydrogen chloride gas produced as a by-product of fertilizers in order to produce calcium chloride? Currently, hydrogen chloride gas is absorbed using water to produce 31% hydrochloric acid; this 31% hydrochloric acid then reacts with calcium carbonate powder to yield a calcium chloride solution, from which solid calcium chloride is obtained through evaporation. The amount of water that needs to be evaporated is large, resulting in high costs for electricity and coal. In the process used by power plants for desulfurization, calcium carbonate slurry is used to absorb gaseous sulfur dioxide, producing desulfurized gypsum. There is an acid-base reaction between the calcium carbonate slurry and gaseous hydrogen chloride, and this reaction is more vigorous. Could the desulfurization process using calcium carbonate in power plants be adapted to absorb gaseous hydrogen chloride and produce calcium chloride? In this way, there is no evaporation, so production costs can be **reduced*. There are many talented people in HaiChuan – experts in technology and craftsmanship – so I’d like to hear everyone’s opinions.
Personally, I think it’s completely feasible, and the absorption rate will be faster and more complete than that of cysteine
Build a simple experimental setup to give it a try
There are many questions to explore here. Calcium carbonate powder does not react with hydrogen chloride gas, because the reaction between them is a double-displacement reaction, which is a type of ionic reaction that must take place in an aqueous solution: CaCO3 + 2H+ == H2O + CO2 + Ca2+. Hydrogen chloride gas is a covalent compound and does not contain hydrogen ions; therefore, the reaction shown above cannot occur. The poster is referring to calcium carbonate slurry; water is present here, and hydrogen chloride can dissolve in water to form hydrochloric acid, which then reacts with calcium carbonate to ultimately produce water and carbon dioxide. If an excessive amount of hydrogen chloride gas is introduced during the production process, a large quantity of hydrogen chloride will be mixed in the resulting carbon dioxide, which will make subsequent processing very **troublesome
There are many questions to explore here. Calcium carbonate powder does not react with hydrogen chloride gas, because the reaction between them is a double-displacement reaction, which is a type of ionic reaction that must take place in an aqueous solution: CaCO3 + 2H+ == H2O + CO2 + Ca2+. Hydrogen chloride gas is a covalent compound and does not contain hydrogen ions; therefore, the reaction shown above cannot occur. The poster is referring to calcium carbonate slurry; water is present here, and hydrogen chloride can dissolve in water to form hydrochloric acid, which then reacts with calcium carbonate to ultimately produce water and carbon dioxide. If an excessive amount of hydrogen chloride gas is introduced during the production process, a large quantity of hydrogen chloride will be mixed in the resulting carbon dioxide, which will make subsequent processing very **troublesome
There are many questions to explore here. Calcium carbonate powder does not react with hydrogen chloride gas, because the reaction between them is a double-displacement reaction, which is a type of ionic reaction that must take place in an aqueous solution: CaCO3 + 2H+ == H2O + CO2 + Ca2+. Hydrogen chloride gas is a covalent compound and does not contain hydrogen ions; therefore, the reaction shown above cannot occur. The poster is referring to calcium carbonate slurry; water is present here, and hydrogen chloride can dissolve in water to form hydrochloric acid, which then reacts with calcium carbonate to ultimately produce water and carbon dioxide. If an excessive amount of hydrogen chloride gas is introduced during the production process, a large quantity of hydrogen chloride will be present in the resulting carbon dioxide, and the subsequent processing of this mixture will be very **troublesome
There are many questions to explore here. Calcium carbonate powder does not react with hydrogen chloride gas, because the reaction between them is a double-displacement reaction, which is a type of ionic reaction that must take place in an aqueous solution: CaCO3 + 2H+ == H2O + CO2 + Ca2+. Hydrogen chloride gas is a covalent compound and does not contain hydrogen ions; therefore, the reaction shown above cannot occur. The poster is referring to calcium carbonate slurry; water is present here, and hydrogen chloride can dissolve in water to form hydrochloric acid, which then reacts with calcium carbonate to ultimately produce water and carbon dioxide. If an excessive amount of hydrogen chloride gas is introduced during the production process, a large quantity of hydrogen chloride will be present in the resulting carbon dioxide, and the subsequent processing of this mixture will be very **troublesome
This post was last edited by Wuhan Jinsui Fertilizer Industry on 2017-12-23 at 16:20. Hydrogen chloride dissolves in water while carbon dioxide does not; can they be separated this way?
Your knowledge of chemistry is roughly at the middle school level; such discussions on industrial issues are really not suitable for you. Because it’s clear from your reply that you’re too inexperienced.
Your idea should work, but care should be taken to control the exothermic effect during the absorption of hydrogen chloride gas, as the absorption process may cause a rise in temperature, which reduces the absorption efficiency. The temperature and the flow state of the medium can be better controlled by adjusting the concentration and spraying amount of the calcium carbonate slurry.
This post was last edited by Wuhan Jinsui Fertilizer Industry on 2017-12-23 at 19:04. Thank you all for your valuable suggestions; no one has done this before. Is it feasible to do this? Thank you all