Presentation on theme: "With your favorite host Vignesh Sridharan Guests on todays show K. Vaideesh Subbaraj Shivendra Upadhyay M. Vishwanath Analysis of Biomass and Biofuels."— Presentation transcript:
With your favorite host Vignesh Sridharan Guests on todays show K. Vaideesh Subbaraj Shivendra Upadhyay M. Vishwanath Analysis of Biomass and Biofuels as source of energy
Technology and Environmental Impact of Biomass & Biofuels
Technology Biomass technology today serves many markets that were developed with fossil fuels and modestly reduces their use Uses - Industrial process heat and steam, Electrical power generation, Transportation fuels (ethanol and biodiesel) and other products. Primary focus of the Biomass Program – development of advanced technologies.
Bio-refinery A facility that integrates biomass conversion processes and equipment to produce fuels, power, and chemicals from biomass. Analogous to today's petroleum refineries It is based on the Sugar Platform and the Thermochemical Platform
Liquid Fuel Technology
Bio-diesel Made by transforming animal fat or vegetable oil with alcohol. Fuel is made from rapeseed (canola) oil or soybean oil or recycled restaurant grease. Directly substituted for diesel either as neat fuel or as an oxygenate additive
Modified Waste Vegetable Fat Designed for general use in most compression ignition engines. The production of MWVF can be achieved in a continuous flow additive process. It can be modified in various ways to make a 'greener' form of fuel
E-Diesel Uses additives in order to allow blending of ethanol with diesel. Ethanol blends of 7.7% to 15% and up to 5% Additives that prevent the ethanol and diesel from separating at very low temperatures or if water contamination occurs.
Jatropha Biodiesel from Jatropha Seeds of the Jatropha nut is crushed and oil is extracted The oil is processed and refined to form bio-diesel.
Gaseous fuel Technology
Gasification Technology Gobar gas Production Biogas Synthesis gas
Gasification A process that uses heat, pressure, and steam to convert materials directly into a gas composed primarily of carbon monoxide and hydrogen. Gasification technologies rely four key engineering factors 1. Gasification reactor atmosphere (level of oxygen or air content). 2. Reactor design. 3. Internal and external heating. 4. Operating temperature.
Gasification Typical raw materials - coal, petroleum-based materials, and organic materials. The feedstock is prepared and fed, in either dry or slurried form, into a sealed reactor chamber called a gasifier. The feedstock is subjected to high heat, pressure, and either an oxygen-rich or oxygen-starved environment within the gasifier.
Raw Materials for Gasification
Gasification Products of gasification : * Hydrocarbon gases (also called syngas). * Hydrocarbon liquids (oils). * Char (carbon black and ash). Syngas is primarily carbon monoxide and hydrogen (more than 85 percent by volume) and smaller quantities of carbon dioxide and methane
Types of Gasifiers Updraft Gasifier
Types of Gasifiers Downdraft Gasifier
Types of Gasifiers Twin-fire Gasifier
Types of Gasifiers Crossdraft gas producers
Gobar gas Gobar gas production is an anaerobic process Fermentation is carried out in an air tight, closed cylindrical concrete tank called a digester
Wood Domestic heating with wood is still by far the largest market for bio-energy Dramatic improvements of technology in domestic heating equipment Improved tiled stoves, advanced logwood boilers, woodchip boilers, pellet boilers and pellet stoves. Pourable wood-based fuel is also available
Pellet Boilers and Stoves
Environmental Concerns Air Pollution Soil Deterioration
Air Concerns Biomass processing technologies and biofuels use have the potential to increase emissions of ozone precursors o Increase in No x emissions Excessive inhalation of ethanol is harmful Combustion of ethanol would result in increased atmospheric concentrations of carcinogens Emission of relatively large sized particulate matter
Soil Concerns Burning biomass deprives local eco-systems of nutrients Production of dedicated energy crops renders land fallow Reduced land availability for cattle grazing Increased use of pesticides and fertilizers to produce energy crops contaminate ground and surface water o Affects fish and wildlife
Environmental Benefits Reduction of waste Extremely low emission of greenhouse gases compared to fossil fuels Ethanol is Carbon neutral and forms a part of the carbon cycle Growing variety of crops increases bio-diversity
Socio-Economic Benefits Helps developing economies by promoting agrarian communities Increase in jobs Increase in trade balance (Indian perspective) due to lesser dependence on foreign resources
BIO FUELS THE WORLD SCENARIO
BRAZIL World leader in production and export of ethanol. Ethanol produced per day equivalent to 200,000 barrels of gasoline. 24% blend ethanol mandatory. Competitiveness Bio diesel initiatives underway
U.S.A. Ethanol : a big boost to economy E85 sells cheaper than gasoline Currently production aimed at 4.5 Billion gallons/yr MTBE phased out in many states Soya bean main source of biodiesel
E.U. Rapeseed main source of bio diesel 3-15% blended petrol France: Bio diesel exempted from domestic tax Germany: Sales of bio diesel 99 million US gallons Rise of SVO as domestic fuel
The Significant Others China: 3 rd largest producer of ethanol producing 220,000 tons of ethanol, exporting 90,000 tons in 2000. In southeast Asia, the Jatropha tree is used as a significant fuel source Malaysia and Indonesia are starting pilot- scale production from palm oil.
India Sources of ethanol: Sugarcane Molasses Agricultural waste Low average cost of Rs.18/litre projected Annual production capacity of 1.5 Billion litres
Sources of biodiesel: Honge Jatropha High capital, broad scale production plan initiated Cost per liter projected at Rs. 27 India (Contd.)
Bio Mass Biomass already supplies 14 % of the worlds primary energy consumption. On average, biomass produces 38 % of the primary energy in developing countries. USA: 4% of total energy from bio mass, around 9000 MW INDIA is short of 15,000 MW of energy and it costs about 25,000 crores annually for the government to import oil.
Bio Mass from cattle manure, agricultural waste, forest residue and municipal waste. Anaerobic digestion of livestock wastes to give bio gas Digester consumes roughly one third the power its capable of producing. Fertilizers as by product. Average electricity generation of 5.5kWh per cow per day!!