1 / 11

Making Fertilisers

Making Fertilisers. Useful products from the AIR!. Making Fertilisers. Most fertilisers have a high nitrogen content. Hence they are called nitrogenous fertilisers . NPK fertilisers contain compounds of nitrogen, phosphorus and potassium. Making Fertilisers.

halee-dean
Télécharger la présentation

Making Fertilisers

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Making Fertilisers Useful products from the AIR!

  2. Making Fertilisers • Most fertilisers have a high nitrogen content. • Hence they are called nitrogenous fertilisers . • NPK fertilisers contain compounds of nitrogen, phosphorus and potassium

  3. Making Fertilisers • The two most common fertilisers are ammonium nitrate and ammonium sulphate. • Ammonia is NH3, it is made by the Haber process with nitrogen from the air.

  4. Making Fertilisers • Ammonia is a strong alkali, to turn it into a fertiliser it has to be neutralised with an acid.

  5. Making Fertilisers • Ammonium nitrate is made by neutralising ammonia (a base) with nitric acid.

  6. Making Fertilisers Ammonia + nitric acid ammonium nitrate NH3(aq) + HNO3(aq) NH4NO3(aq)

  7. Making Fertilisers • The solution is heated to evaporate the water and the solid ammonium nitrate is formed into pellets. • The nitric acid itself is made from ammonia, this makes ammonia made by the Haber process very important for producing fertilsers.

  8. Making Fertilisers • Ammonium sulphate is made by neutralising ammonia (a base) with sulphuric acid. • This provides plants with sulphur as well as nitrogen.

  9. Making Fertilisers Ammonia + sulphuric acid ammonium nitrate 2NH3(aq) + H2SO4(aq) (NH4)2SO4(aq)

  10. Making Fertilisers • The Haber process makes ammonia out of hydrogen and nitrogen. • The Haber process is a very important industrial process

More Related