Correct
Ans: D
Exp:
India has the advantage of achieving carbon neutrality through bioethanol and renewable energy-based electrification but the government needs to create a mechanism to make prices of bioethanol fuel more affordable to make it economically viable for users, Honda Motor Co Ltd Chief Engineer said recently.
- Biofuels are Hydrocarbon fuels produced from organic matter (living or once-living) in a short time span.
- Types:
- Solid: Wood, dried plant material, manure
- Liquid: Bioethanol, Biodiesel
- Gaseous: Biogas
Applications of Biofuels:
- Replacement or supplement for diesel, petrol, and other fossil fuels
- Used in transport, stationary, portable applications, heat, and electricity generation
Reasons for Shifting to Biofuels:
- Rising oil prices
- Greenhouse gas emissions from fossil fuels
- Benefits to farmers through agricultural crop use
Categories of Biofuels:
First Generation Biofuels:
- Source: Food crops (sugar, starch, vegetable oil, animal fats)
- Examples: Bioalcohols, Biodiesel, Vegetable oil, Bioethers, Biogas
- Advantages: Easy conversion process
- Disadvantages:
- Impacts food economy
- Leads to increased food prices and hunger
Second Generation Biofuels:
Statement 1 is Correct: Second-generation biofuels are produced using non-food biomass, such as agricultural residues (e.g., corn stover, rice husks) and woody crops, making them distinct from first-generation biofuels that rely on food crops like corn and sugarcane.
- Source: Non-food crops or inedible parts of food crops (e.g., stems, husks, wood chips)
- Examples: Cellulose ethanol, Biodiesel
- Production Methods: Thermochemical or biochemical processes
- Advantages:
- Does not impact food economy
- Emits fewer greenhouse gases than first-generation biofuels
- Disadvantages: Complicated production process
Third Generation Biofuels:
Statement 2 is Correct: Third-generation biofuels are derived from algae, which offer significant advantages over other sources due to their higher yields, rapid growth, and minimal land and water requirements. Algae can also grow in non-arable land, making them a sustainable option.
- Source: Micro-organisms like algae
- Example: Butanol
- Advantages:
- Utilizes land and water unsuitable for food production
- Reduces strain on depleted water resources
- Disadvantages: Fertilizers used can cause environmental pollution
Fourth Generation Biofuels:
Statement 3 is Correct: Fourth-generation biofuels incorporate carbon capture and storage (CCS) technologies, enabling them to absorb more carbon dioxide during production than they emit during combustion. This makes them carbon-negative, contributing to net carbon removal.
- Source: Genetically engineered crops with high carbon intake
- Process:
- Conversion using second-generation techniques
- Pre-combusted fuel with carbon capture and geo-sequestration
- Advantages:
Carbon-negative; removes carbon from the environment
Incorrect
Ans: D
Exp:
India has the advantage of achieving carbon neutrality through bioethanol and renewable energy-based electrification but the government needs to create a mechanism to make prices of bioethanol fuel more affordable to make it economically viable for users, Honda Motor Co Ltd Chief Engineer said recently.
- Biofuels are Hydrocarbon fuels produced from organic matter (living or once-living) in a short time span.
- Types:
- Solid: Wood, dried plant material, manure
- Liquid: Bioethanol, Biodiesel
- Gaseous: Biogas
Applications of Biofuels:
- Replacement or supplement for diesel, petrol, and other fossil fuels
- Used in transport, stationary, portable applications, heat, and electricity generation
Reasons for Shifting to Biofuels:
- Rising oil prices
- Greenhouse gas emissions from fossil fuels
- Benefits to farmers through agricultural crop use
Categories of Biofuels:
First Generation Biofuels:
- Source: Food crops (sugar, starch, vegetable oil, animal fats)
- Examples: Bioalcohols, Biodiesel, Vegetable oil, Bioethers, Biogas
- Advantages: Easy conversion process
- Disadvantages:
- Impacts food economy
- Leads to increased food prices and hunger
Second Generation Biofuels:
Statement 1 is Correct: Second-generation biofuels are produced using non-food biomass, such as agricultural residues (e.g., corn stover, rice husks) and woody crops, making them distinct from first-generation biofuels that rely on food crops like corn and sugarcane.
- Source: Non-food crops or inedible parts of food crops (e.g., stems, husks, wood chips)
- Examples: Cellulose ethanol, Biodiesel
- Production Methods: Thermochemical or biochemical processes
- Advantages:
- Does not impact food economy
- Emits fewer greenhouse gases than first-generation biofuels
- Disadvantages: Complicated production process
Third Generation Biofuels:
Statement 2 is Correct: Third-generation biofuels are derived from algae, which offer significant advantages over other sources due to their higher yields, rapid growth, and minimal land and water requirements. Algae can also grow in non-arable land, making them a sustainable option.
- Source: Micro-organisms like algae
- Example: Butanol
- Advantages:
- Utilizes land and water unsuitable for food production
- Reduces strain on depleted water resources
- Disadvantages: Fertilizers used can cause environmental pollution
Fourth Generation Biofuels:
Statement 3 is Correct: Fourth-generation biofuels incorporate carbon capture and storage (CCS) technologies, enabling them to absorb more carbon dioxide during production than they emit during combustion. This makes them carbon-negative, contributing to net carbon removal.
- Source: Genetically engineered crops with high carbon intake
- Process:
- Conversion using second-generation techniques
- Pre-combusted fuel with carbon capture and geo-sequestration
- Advantages:
Carbon-negative; removes carbon from the environment