biogas as vehicle fuel

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BIOGAS AS VEHICLE FUEL PRESPECTIVE AND PROSPECTUS IN INDIA

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BIOGAS AS VEHICLE FUELPRESPECTIVE AND PROSPECTUS IN INDIA : 

BIOGAS AS VEHICLE FUELPRESPECTIVE AND PROSPECTUS IN INDIA PRESENTED BY VINAY VASHISHTHA

Slide 2: 

Sectoral Energy Consumption

Slide 4: 

Rising imports

Slide 5: 

Motor Vehicle Growth Since 1986 Growth in Negative Oil Balance toward Imports India: Oil and Vehicles

Slide 7: 

70% of oil demand is for transport in USA 80% in Australia IS IT THE FUTURE

It’s Time to Move Beyond Oil! : 

It’s Time to Move Beyond Oil! Renewable energy potential in India Source/Technology Potential Availability Exploited Biogas plants 12 million 2.7 million Biomass-based power 17,000 MW 69.5 MW Efficient woodstoves 120 million 20 million Solar energy 5x106 GWh/yr 25 MW Small hydro 10,000 MW 250 MW Wind energy 20,000 MW 1,000 MW Ocean thermal 50,000 MW -- Sea wave power 20,000 MW -- Tidal power 9,000 MW -- Energy from wastes 1,700 MW -- Source: Planning Commission 1999, and MNES 1999.

What we are looking in a fuel : 

What we are looking in a fuel Economical Reliable Environment friendly

What is “Biogas” : 

Clean environment friendly fuel. Produced by anaerobic digestion of biological wastes. Cheap and versatile fuel. What is “Biogas”

Chemical composition : 

Chemical composition

Benefits : 

Benefits Renewable High nutrient fertilizer produced in excess. Environment friendly. Reduces methane and carbon dioxide release into the air. Cheap to produce. Many different uses. Reduces landfill sites, sewage drainage, and farm manure. Clean/ quiet fuel for cars and trucks

Limitations : 

Limitations Difficult to compress Low calorific value Use is limited near to the site Reduced power from vehicles. Extra time required to produce in comparison to other energy resources

Upgrading biogas : 

Upgrading biogas Removal of carbon dioxide. Removal of H2S. Removal of water vapor. Compression of biogas. Transportation of compressed gas.

Water absorption method : 

Water absorption method Uses pressurized water as absorbent. CO2 & H2S both are removed. Simplest and cost effective method. Addition of water vapor.

Slide 29: 

Uses pressurized water as absorbent. Compressed biogas is fed from bottom. CO2 & H2S dissolves in water Easiest & cheapest method

Slide 31: 

Separation on the basis of difference in partial pressure. 25-40 bar pressure is required. Solid membrane of acetate-cellulose polymer is used.

Slide 32: 

Solvent used are aqueous Amines or aqueous alkaline Salts. High input energy requirement

Chemical absorption method : 

Chemical absorption method Solvent used are aqueous amines or aqueous alkaline salts. Low methane losses. High input energy requirement.

Slide 34: 

Cryogenic separation Separation by fractional condensations and distillation at low temperature. Recovery in liquid form. Thermal efficiency is low Capital cost and utility requirement is high.

Slide 35: 

Chemical conversion method CO2 and H2S are catalytically converted to methane and water. Attains high purity in the product gas. Large amount pure hydrogen is required. High exothermic nature of methanation reaction.

Slide 36: 

Scrubbing of H2S Dry oxidation process Absorption using iron oxide. Liquid phase oxidation process.

Investment cost of upgrading : 

Investment cost of upgrading

Transport of biogas : 

Transport of biogas

Anything can run on biogas : 

Anything can run on biogas

Can we use it : 

Can we use it 5000 tonnes of waste is generated per day in Delhi. 100,000 m3/day of biogas can be produced. Equivalent to 309.5m3 CNG. Worth $70,000 per day. 117 tonnes/day carbon di oxide is prevented from entering into the atmosphere.

Conclusions : 

Conclusions Water scrubbing is simple, continuous and less expensive method for CO2 removal from biogas for Indian conditions. After removal of CO2, biogas is enriched in methane and becomes equivalent to natural gas. It can be used for all such applications for which natural gas is being used viz. as a fuel for vehicles, electricity generation, etc.