Hydrogen-enriched CNG as transportation fuel
Question
In the context of proposals to the use of hydrogen-enriched CNG (H-CNG) as fuel for buses in public transport, consider the following statements:
Which of the statements given above is/are correct?
- 1.
The main advantage of the use of H-CNG is the elimination of carbon monoxide emissions.
- 2.
H-CNG as fuel reduces carbon dioxide and hydrocarbon emissions.
- 3.
Hydrogen up to one-fifth by volume can be blended with CNG as fuel for buses.
- 4.
H-CNG makes the fuel less expensive than CNG.
Options
1 only
2 and 3 only
4 only
1, 2, 3 and 4
Explanation
Statement 1 is incorrect; while H-CNG reduces CO emissions, elimination is too strong a claim and not the main advantage. Statement 2 is correct; H-CNG combustion does reduce carbon dioxide and hydrocarbon emissions compared to pure CNG. Statement 3 is correct; up to 20% (one-fifth) hydrogen can be blended with CNG for use in buses without significant engine modification. Statement 4 is incorrect; H-CNG would be more expensive than CNG due to the additional cost of hydrogen production and blending infrastructure. > H-CNG reduces emissions (CO2 and hydrocarbons) and allows 20% hydrogen blending—statements 2 and 3 are correct. Answer: (b).
Question details
Year
2019
Paper
GS Paper 1
Question
Q43
Subject
Science & Technology
Sub-topic
Alternative fuels and emissions reduction
Type
Statement-based
Difficulty
Medium
Nature
Hybrid
Source hint
Current Affairs 2018-2019 - Green Transport
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