//c/1/./3// Flashcards
(13 cards)
- How can atmospheric pollution caused by power stations that burn fossil fuels be reduced?
Using less electricity
Removing sulfur from natural gas and fuel oil
Removing sulfur dioxide and particulates from the flue gases emitted by coal-burning power stations
- How is the acid gas sulfur dioxide removed from flue gases?
-by wet scrubbing
- What are the two processes of wet scrubbing?
- using an alkaline slurry e.g. a spray of calcium oxide and water
- using sea water
- What is the only way of producing less carbon dioxide?
Burn less fossil fuels
- How can atmospheric pollution caused by exhaust emissions from motor vehicles be reduced?
having more efficient engines
=burns less fuel =less pollution
using low sulfur fuels
=less sulphur dioxide is emitted from the exhaust
using catalytic converters
- nitrogen monoxide is reduced to nitrogen by loss of oxygen= less harmful nitrogen monoxide
- carbon monoxide is oxidised to carbon dioxide by gain of oxygen= less harmful carbon monoxide
adjusting the balance between public and private transport
-less private transport and more public transport= less fuel burnt= less pollution
having legal limits to exhaust emissions (which are enforced by the use of MOT tests)
=limits amount of pollution from emissions
- What are some alternatives to fossil fuels for motor vehicles?
- biofuels (renewable energy resources made from plants and waste)
- electricity (using electric batteries)
- What are benefits and problems to using BIOFUELS as an alternate fuel source for vehicles?
Benefits:
- good for the environment (only produce carbon dioxide and water when burned
- Carbon neutral (carbon emitted is taken in by plants)
Problems:
Large amounts of forest cleared for growing plants= loss of habitat for species
- What are benefits and problems to using ELECTRICITY as an alternate fuel source for vehicles?
Benefits:
- No exhaust gases
- can recharge them
Problems:
-Electricity for batteries is made by burning from burning fossil fuel so there is still pollution
- How does USING LESS ELECTRICITY reduce atmospheric pollution caused by power stations that burn fossil fuels?
-Less electricity= less fossil fuels burnt in power stations= less pollution
- How does REMOVING SULPHUR FROM NATURAL GAS AND FUEL OIL reduce atmospheric pollution caused by power stations that burn fossil fuels?
-Little sulphur dioxide will be produced when it burns
- How does REMOVING SULPHUR DIOXIDE FROM THE FLUE GASES reduce atmospheric pollution caused by power stations that burn fossil fuels?
-So less particulates get released into the atmosphere
- What is the process of wet scrubbing USING AN ALKALINE SLURRY E.G. A SPRAY OF CALCIUM OXIDE AND WATER?
-slurry (a mixture of liquid and ground up solid) is sprayed onto the gases
-the sulfur dioxide reacts with calcium oxide
=solid waste product (calcium sulphate)
- What is the process of wet scrubbing USING SEAWATER?
-sulphur dioxide is dissolved in seawater
=carbon dioxide, water and dissolved sulphate
