Catalysts can take many forms and are used in many industrial processes.

Suggest two reasons why it might be worth using a more expensive catalyst to increase the rate of a reaction.

Any two of:

greater selectivity

higher efficiency

longer life expectancy

OR

not easily poisoned

easier to recover

low«er» environmental impact

large range of conditions/temperatures/pressures supported

lower energy costs

increase in yield «per unit time» offsets cost of catalyst

[Max 2 Marks]