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Q11. Consider the following statements about Categories of Biofuels:

1. First generation biofuels are produced from food crops.

2. Second generation biofuels are produced from cellulosic material such as wood, grasses, and inedible parts of plants.

Select the correct answer using the codes given:



A

a) 1 only

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B

b) 2 only

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C

c) Both 1 and 2

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D

d) None of the above

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Solution

The correct option is D

c) Both 1 and 2


Biofuels are grouped by categories – first generation, second generation, and third generation – based on the type of feedstock the input material used to produce them.

First generation biofuels are produced from food crops. For ethanol, feedstocks include sugar cane, corn, maize, etc.  For biodiesel, feedstocks are naturally occurring vegetable oils such as soybean and canola.

Second generation biofuels are produced from cellulosic material such as wood, grasses, and inedible parts of plants. This material is more difficult to break down through fermentation and therefore requires pre-treatment before it can be processed.

Third generation biofuels are produced using the lipid production from algae. In addition, the term “Advanced Biofuels” is used to describe the relatively new technological field of biofuel production that uses waste such as garbage, animal fats, and spent cooking oil to produce liquid fuels.


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