<p>sulphur is a suffocating gas
How it can be removed or destroyed or disintegrated after it is produced?</p>
<p>With which substance we can remove its suffocating nature?</p>
<p>i found this hard question in AP book</p>
<p>Is it too difficult to solve</p>
<p>hurrrrahhhhhhhh</p>
<p>I know that power plants use scrubbers to remove most of the sulfur dioxide. I only remember that from AP Env.</p>
<p>I don’t know if that answers your question, or helps in any way.</p>
<p>plz guide me more</p>
<p>[title and opening statement edited out - Mod JEM]</p>
<hr>
<p>Air pollution control systems for sulfur dioxide removal are large and sophisticated. Sulfur dioxide is controlled by three different techniques: absorption, adsorption, and the use of low-sulfur fuels. </p>
<p>The control systems used for sulfur dioxide are usually not designed to remove sulfuric acid. The sulfuric acid concentrations are usually below the levels where it is economically feasible or environmentally necessary to install control systems. </p>
<p>Absorption </p>
<p>Absorption processes use the solubility of sulfur dioxide in aqueous solutions to remove it from the gas stream. Once sulfur dioxide has dissolved in solution to form sulfurous acid (H2SO3), it reacts with oxidizers to form inorganic sulfites () and sulfates (). This process prevents the dissolved sulfur dioxide from diffusing out of solution and being re-emitted. For more information about the process of absorption, see the lesson on Gas Absorption in Module 4. </p>
<p>The most common type of sulfur dioxide absorber is the limestone wet scrubber.</p>
<p>Limestone is the alkali most often used to react with the dissolved sulfur dioxide. Limestone slurry is sprayed into the sulfur dioxide-containing gas stream. The chemical reactions in the recirculating limestone slurry and reaction products must be carefully controlled in order to maintain the desired sulfur dioxide removal efficiency and to prevent operating problems. Wet scrubbers used for sulfur dioxide control usually operate at liquid pH levels between 5 to 9 to maintain high efficiency removal. Typical removal efficiencies for sulfur dioxide in wet scrubbers range from 80 to 95%. </p>
<p>Adsorption </p>
<p>Sulfur dioxide can be collected by adsorption systems. In this type of control system, a dry alkaline powder is injected into the gas stream. Sulfur dioxide adsorbs to the surface of the alkaline particles and reacts to form compounds that cannot be re-emitted to the gas stream. Hydrated lime (calcium hydroxide) is the most commonly used alkali. However, a variety of alkalis can be used effectively.</p>
<p>A dry-injection-type dry scrubber can be used on smaller systems as opposed to using the larger, more complicated spray-dryer-type dry scrubber. However, the dry injection system is slightly less efficient, and requires more alkali per unit of sulfur dioxide (or other acid gas) collected. Accordingly, the waste disposal requirements and costs are higher for adsorption systems than absorption systems.</p>
<p>Alternative Fuels </p>
<p>Other techniques used for limiting the emissions of sulfur dioxide are simply to switch to fuels that have less sulfur or to convert to synthetic (processed) fuels that have low sulfur levels. The sulfur dioxide emission rate is directly related to the sulfur levels in coal, oil, and synthetic fuels. However, not all boilers can use these types of fuels. Each type of boiler has a number of very specific and important fuel characteristic requirements and not all low sulfur fuels meet these fuel-burning characteristics.</p>
<p>very very very very------------------------------thanks</p>
<p>thanks i am very very thankful to you
your help made me one of your best friends
thanks again</p>
<p>there are some terms i could not understand plz explain again </p>
<p>1which solution should be used to absorb so2 to convert it into h2so3</p>
<p>2which oxidizers are used </p>
<p>3what is scrubber
thanks again
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order me if you need any help
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thanks</p>
<p>I’ll see what I can do.</p>
<p>plz do more suggestions</p>