Biomass an Alternative.pdf

An alternative energy resource
, 3rd yr.
Applied Electronics & Instrumentation Engineering
Haldia Institute of Technology

 Biomass is a renewable energy source that is derived from
living or recently living organisms.
 It includes dead trees, tree branches, rotting garbage,
agricultural and human wastes like sugarcane, grasses
and wood chips.
 Energy derived from biomass is mostly used to generate
electricity or to produce heat.
 Biomass is found easily all over the world. It can be
chemically and biochemically treated to convert it to a
energy-rich fuel.

Some idea about
Biomass Sources
 Every year, the agricultural industry produces millions
of tons of waste that could be utilized for energy
production.
 In addition, the forest products industry also produces
countless tons of waste that can be used as an energy
source.
 Energy crops, such as willows and switch grass can be
grown for the specific purpose of energy production.
 Farmers grow corn and soybeans that can be used for
ethanol production

What is Bioenergy?
 The energy stored in biomass is
called bioenergy.
 Bioenergy is very versatile: It
can be used to provide heat,
make fuels, and generate
electricity.

 Conversion of biomass to energy requires some extraction if the
fuel stream is contaminated with polluting substances
 Typical processes are the following:
 Direct combustion
 Anaerobic Digestion
 Fermentation
 Pyrolysis
 Other less-used techniques
Enzymes can change cellulose into sugars, which can then be
fermented into alcohol
Cane sugar, C6H12O6 --> 2C2H5OH + 2CO2
Fermentation of corn or other biomass will produce ethanol.
Technology of
Energy Conversion

How Much Biomass is Out There?
 “INDIA” has enough land and agricultural
networks to sustainably replace half of
the nation’s gasoline use or all of its
nuclear energy.
 Millions of tons of unused agricultural
waste, manure, and sawdust has the
potential to generate energy.

Biofuels
 Biomass is one of the few renewable
sources for transportation fuels
 Biofuels produce fewer emissions than
petroleum fuels
 The three main types of biofuels are :-
Ethanol Biodiesel Biogas

Ethanol: a form of Biofuel
 Also known as ethyl alcohol or grain alcohol.
 Ethanol is made from the starch in certain grains, such
as wheat, corn etc.
 Ethanol production usually begins with the grinding up of
biomass such as wheat or corn.
 Once ground up, the starch or cellulose is converted into
sugar.
 The sugar is then fed into microbes that use it for food,
producing ethanol in the process.
 Ethanol Uses :--
 Most gasoline mixtures contain about 10 percent
ethanol and 90 percent gasoline.
 All vehicles are equipped to handle this mixture.
 Such a mixture reduces greenhouse gases by up to 4
percent.

E85 Fuel
 Fuel containing 85 percent gasoline and 15 percent
ethanol can be used in flexible fuel vehicles.
 The use of E85 fuel reduces the emission of greenhouse
gases by up to 37 percent.
 E85 is considered an alternative fuel under the Energy
Policy Act of 1992.
 Vehicles that run on E85 are called Flexible Fuel Vehicles
(FFV).
 Many vehicle manufacturers offer FFVs. Ford, Mercedes,
GM and Chrysler all offer FFVs.
 Reduces Petroleum Consumption- Using E85 reduces
dependence on foreign oil markets.

 Made by transforming animal fat or
vegetable oil with alcohol .
 Fuel is made from rapeseed (canola) oil
or soybean oil or recycled restaurant
grease.
 It is directly used in place ofdiesel either
as neat fuel or as an oxygenate additive
Biodiesel

Jatropha Tree
• Biodiesel from Jatropha.
• Seeds of the Jatropha nut is
crushed and oil is extracted
• The oil is processed and
refined to form bio-diesel.

The roll of biodiesel is not to replace the petroleum diesel, but to help
create a balanced energy policy. Biodiesel is one of several alternative
fuels designed to extend the usefulness of petroleum and the longevity.
 Easy to use:-
No vehicle modifications or special fuelling equipment is needed.
 Power, Performance and Economy:-
Proven performance and economy make biodiesel a renewable
winner.
 Emissions & Greenhouse Gas Reduction:-
With lower exhaust emissions biodiesel is helping to reduce pollution
and improve health. Lower CO2 emission help reduce the impact of
Global warning.
 Energy balance & security:-
Biodiesel helps reduce the need for foreign oil.
 Economical Development:-
Biodiesel helps communities by keeping energy RUPEES at home.

 Methane is the primary biogas.
 Landfill gas is primarily methane but contains CO2 and
other gases from plastics, etc.
 Gobar Gas :-
Gobar gas
production is an
anaerobic process.
BIO-GAS
050315

Methane, CH4, is a likely future hydrogen gas
source
The four H atoms allow more hydrogen to be
produced per molecule of methane
Cracking or pyrolysis changes the
molecules to yield hydrogen and CO, which
is also combustible
The combination of methane and COx is
known as biogas and can be made from
acetic acid, produced from glucose by
microorganisms.
Some !dea about Methane

Biobased Products
 Biomass can also be used as a fuel to make
everyday products that are usually produced
using fossil fuels.
 Any product that we can make from fossil fuels
can be identically made from biomass.
 Moreover, bio based products most often
require less energy to produce than petroleum
based products.

Environmental & Economic Advantages
•Reduction of waste
•Use of waste that would normally go to landfills
• 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
•Helps developing economies by promoting agrarian
communities
•Increase in jobs
•Increase in trade balance (Indian perspective) due to
lesser dependence on foreign resources
$$$

Biomass and The National
Energy Policy
 The main goal of any country’s National
Energy Policy is to increase the domestic
energy supplies.
 Biomass and biofuels will always be
produced in a country like INDIA.
 As a result, the use of biomass directly
supports the National Energy Policy by
reducing INDIA’s dependency on foreign
oil.

Environmental Concerns(DISADVANTAGES)
*Soil Erosion
*Air Pollution

Air Concerns
• Biomass processing
technologies and biofuel’s use
have the potential to increase
emissions of ozone precursors
oIncrease in Noxemissions
•Excessive inhalation of
ethanol is harmful
•Combustion of ethanol would
result in increased
atmospheric concentrations of
carcinogens(cancerous materials)
• Emission of relatively large
sized particulate matter
Soil Concerns

Biomass and the Future
 More research is being conducted to improve technologies
for making electricity and fuels from biomass.
 Some oil companies and petrochemical industries have
begun to explore biomass energy.
 The biggest challenge is the cost of bioenergy: As long as
fossil fuels remain cheaper than bioenergy, people will be
hesitant to invest in this technology.
 Biomass is sustainable but there is an expense in producing
collecting, storing, transporting and converting biomass into
fuels and electricity. It presents many challenges.
 Biomass Infrastructure will have to be built to ensure a safe
and efficient supply system for biomass.
 While biomass is one of the best forms of renewable energy,
but yet , it is not a great fuel.

CONCLUSION
 Biomass is a potential alternative to fossil fuels but it is not very viable
because there are many problems in the development and
transportation of it and it also produces CO, CO2 and some other
pollutant materials just like fossil fuels. Thus, it also pollutes our
beautiful environment, however lesser than the fossil fuels.
 Renewable Energy like BIOMASS has many advantages, but cannot
and will not solve all of the world’s energy problems on its own.
Certainly, renewable resources have an important role to play within the
context of a continuous and stable energy supply. All in all, however,
renewable energy resources like BIOMASS are certain to play a LARGE
and growing role in the “Next Century”.
 Consequently, it can be used as an alternative of fossil fuels up to a
certain limits, as there are available a few better alternative energies like
solar energy, wind energy etc.

Biomass an Alternative.pdf

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