Catalytic converters 0.0 / 5 ? ChemistryGreen ChemistryASAQA Created by: Sopha8Created on: 21-05-14 18:52 Explain the problems with burning fossil fuels 1) incomplete combustion 2) produces NO 3)sulphur dioxide- produces sulphuric acid in atmosphere-acid rain=corrodes buildings, destroyes trees 1 of 7 How do industries solve the problem of sulphur dioxide? mesh with calcium oxide-neutralise to calium sulphate- plaster 2 of 7 What are 2 pollutants produced when alkanes are used as fuel? whats the problem with them? 1) CO- incomplete combustion, poisnous, bind to haemglobin, 2) NO -smog=respiratory damage 3 of 7 What is a catalytic converter? remove pollutants from cars, transition metals eg Palladium/ Rhodium 4 of 7 How are catalytic converters used to remove CO and NO? whats the reactions? 1)CO= NO oxisidises it to CO , 2CO + 2NO------>2CO + N, 2) 2NO---->N + O 5 of 7 What is cracking? why is it done? breaking long chain alkanes into smaller hydrocarbons, high deman products 6 of 7 What are the positives and negatives of the 2 types of cracking? thermal- negative=high temps- expensive, damage environment, positive=even residue, catalytic-negative=shorter chains, positive=catalyst speed up reaction & lower temp so cuts costs 7 of 7
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