A grain dryer burns a fuel containing carbon, hydrogen and a sulfur impurity.
A technician tests three air inlet settings using the same fuel. Opening the air inlet wider increases the supply of oxygen.
| Air inlet setting in % | Mass of carbon monoxide released per kg of fuel in g | Mass of particulates released per kg of fuel in g | Mass of sulfur dioxide released per kg of fuel in g | Energy released per kg of fuel in MJ |
|---|---|---|---|---|
| 25 | 42 | 12.0 | 3.2 | 21 |
| 50 | 15 | 4.8 | 3.1 | 29 |
| 100 | 2.0 | 0.6 | 3.2 | 36 |
Evaluate the three air inlet settings and recommend which setting should be used.
In your answer, explain the patterns in the data and the health and environmental problems caused by the pollutants.
102 exam-style questions on AQA GCSE Chemistry 9.3 Common atmospheric pollutants and their sources, covering 9.3.1 Atmospheric pollutants from fuels and 9.3.2 Properties and effects of atmospheric pollutants. Each one has a worked solution and a mark scheme showing where the marks go.