Cornerstone - Spring 2015 - (Page 71)
VOLUME 2, ISSUE 4
THE ENERGY FRONTIER OF COMBINING COAL
AND RENEWABLE ENERGY SYSTEMS
do agree with the author that coal will continue to be used
widely and in considerable quantities, and remains vitally
important for many economies. Realizing this I would like to
add that more than 70% of the natural coal/lignite resources
across the globe are non-extractable and coal/lignite is not
necessarily a green fuel; its combustion produces CO2 and
other emissions. However, in situ coal biomethanation (ICB) is
centered on the concept of extraction of energy from the nonextractable coal/lignite and utilization of CO2 for value addition
so that industrial-scale energy extraction becomes almost
carbon-neutral or, in some cases, even carbon-negative.
ICB or underground coal biogasification (UCBG) is an emerging energy extraction technology. Biomethanation is a natural,
ongoing phenomenon in some coal seams, while actively
bio-converting coal into methane includes acceleration of the
process for commercial exploitation.
75% carbon-neutrality at present. With continued efforts, the
process would likely be techno-commercially feasible in any
and all types of coal for extraction of energy on a sustainable
basis with 100% carbon-neutrality or even carbon-negativity.
Therefore, my comment is that while considering "The Energy
Frontier of Combining Coal and Renewable Energy Systems",
international agencies like IEA Clean Coal Centre and others
should also examine and explore the possibility of conversion
of all coals into a renewable source of energy.
Former Chief Manager
Coal India Ltd
THE FLEXIBILITY OF GERMAN COAL-FIRED
POWER PLANTS AMID INCREASED RENEWABLES
his is a well-written article that provides a clear explanation of the issues facing reliable electricity supply as
renewable generation provides more and more of the
capacity, yet still must rely on coal as a backup. As shown in
the article, the consumer is paying dearly for this renewable
My research reveals that ICB is techno-commercially feasible
in most coals and capable of commercially extracting more
than 66% of the energy contained therein with more than
LTI - Global
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Table of Contents for the Digital Edition of Cornerstone - Spring 2015
From the Editor: Full Steam Ahead to Improved Efficiency
Cover Story: Upgrading the Efficiency of the
World’s Coal Fleet to Reduce CO2
Shenhua’s Evolution From Coal
Producer to Clean Energy Supplier
Global Platform for Accelerating Coal Efficiency
Breaking Through the Safety Plateau:
An Exclusive Interview With Bruce Watzman
What is on the Cards for the Coal Industry in 2015?
Navigating India’s Coal Maze
Conceptualizing a Revolution in China’s Coal Utilization:
An Exclusive Interview With Cen Kefa
Setting the Benchmark: The World’s
Most Efficient Coal-Fired Power Plants
China Brings Online the World’s First
600-MW Supercritical CFB Boiler
Challenging Efficiency Limitations for Coal-Fired Power Plants
Improving the Efficiency of Power Plants Firing High-Moisture Coal
Helping to Seed a CCS Industry: The White Rose CCS Project
Update on the 50-MWe Theunissen
Underground Coal Gasification Project
Cornerstone - Spring 2015
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