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CODATA 2006 Session B9 Clean Energy Recovery from Coal. Objectives: Negative public feeling against Coal due to large CO 2 and other pollutants emission compared to other fossil fuels. However, new technology is developed, to use coal clean and to recover clean energy from coal seam.

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codata 2006 session b9 clean energy recovery from coal
CODATA 2006Session B9 Clean Energy Recovery from Coal

Objectives:

  • Negative public feeling against Coal due to large CO2 and other pollutants emission compared to other fossil fuels.
  • However, new technology is developed, to use coal clean and to recover clean energy from coal seam.
  • Demonstrate the recent trend and relevant data in this field.
codata 2006 session b9 clean energy recovery from coal1
CODATA 2006Session B9 Clean Energy Recovery from Coal

How to use coal clean

  • Gaseous fuel: Gasification (surface, underground)

Coalbed methane production

  • Liquid fuel: Liquefaction

4 Presentations:

  • Coalbed methane (CBM)
  • Underground coal gasification (UCG)
  • Enhanced coalbed methane recovery
  • LCA of total coal energy system
coalbed methane as a clean energy resources asian prospects

Coalbed Methane as a Clean Energy Resources- Asian Prospects -

20th CODATA Conference

October 23, 2006 Beijing

Sohei SHIMADA

Dept. of Environment Systems,

The University of Tokyo

outline of presentation
Outline of Presentation
  • What is CBM?
  • CBM and CMM
  • World CBM Resources
  • Recent Production Technology
  • Recent Utilization Technology
  • Asian Prospects

China / India /Indonesia

  • Conclusion
cbm coalbed methane
CBM:Coalbed Methane
  • Methane generated during the coalfication process and stored in coal seam.
  • Originally the term “CBM” was used in Gas Industry as one kind of Natural Gas.
  • There is another concept in Mining Industry for draining coal mine gases to hold the mine safety.
  • CBM is a rather new energy resources (1980s).
  • GHG with 21 times GWP more than CO2.
slide7
Classification of Coalbed Methane (proposed by UN ECE)

CAG:

Coal Associated Gas

CBM: Coalbed Methane

includes pre-mining drainage via virgin CBM wells > 1 year before mining

CMG:

Coal Mine Gas

CMM: Coal Mine Methane

including pre-mining drainage via virgin CBM wells < 1 year before mined through, in-mine drainage and gob (goaf) wells

AMM:

Abandoned Mine Methane

VAM:

Ventilation Air Methane

world cbm resources
World CBM Resources

Source: IEA CR/76 (1995)

recent cbm production technology
Recent CBM Production Technology
  • Horizontal wells
  • Enhanced coalbed methane recovery
slide13
CDX Gas: Z-Pinnate Drilling and Completion Technology (Pinnate Technology)

In order to make the drilling of horizontal wells stable, pressure in the wells are controlled by injecting air. (Dual Well System with Air Injection)

enhanced coalbed methane recovery
Enhanced Coalbed Methane Recovery
  • Production enhancement by CO2 and/or N2 injection.
  • Effective for the low permeability coal.
  • CO2 injection: production enhancement by CH4/CO2 displacement (competitive adsorption)
  • N2 injection: production enhancement by decreasing CH4 concentration in pore (stripping effect).
  • Need of gas (CH4/CO2/N2) separation before injection or after production.
  • Separation cost is expensive.
recent cbm utilization technology and r d
Recent CBM Utilization Technology and R&D
  • Replacement of natural gas

Town gas, Industrial boilers

  • Power generation

Gas turbine,Gas engine, Co-combustion, Fuel cell

  • Oxidation/heat production

Vocsidizer (MEGTEC system)

  • Chemical feed stock

Hydrogen production

asian prospects for cbm
Asian Prospects for CBM
  • China
  • Indo
  • Indonesia
cbm resources in china
CBM Resources in China
  • Resources: 36.81 trillion m3 (depth up to 2,000m)
  • Recoverable resources: 10.87 trillion m3
  • Proved reserves (by government):102 billion m3
  • Recoverable reserves: 47 billion m3
cbm production in china
CBM Production in China
  • 8 CBM pilot production projects
  • 615 CBM wells (including 7 multi-lateral wells) (as of end of 2005)
  • CBM production in 2005: 100 million m3
prospects of cbm production
Prospects of CBM Production
  • 10 billion m3 production in 2010 (5 billion m3 from surface wells, 5 billion m3 from gas drainage wells)
  • Increase CBM proved reserves up to 300 billion m3
  • CBM production in 2005: 100 million m3
  • Investment by CBM industry: RMB 30 billion
prospects of cbm production1
Prospects of CBM Production
  • CMM: increase utilization rate from 30% to 50%
  • Combination of underground gas drainage with surface gas production
  • Build 9 new pipelines with a total length of 1,390 km (RMB 29.5 billion)
slide36
CBM Resources of Indonesia

= 12.2 Tm3

Advanced Resources International, Inc (ARI) “Indonesia Coalbed Methane, Task 1 – Resource Assessment”, March 17, 2003

conclusion
Conclusion
  • CBM: Promising new Natural Gas Resources
  • CMM: Possible local energy source and large potential to decrease GHG emission
  • CMM: New source of environment business (CDM etc.)
  • Technology development in production and utilization can make the potential larger.
  • Need to establish the reliable CBM reservesevaluation method.
conclusion asian prospects
Conclusion (Asian Prospects)
  • China: Firm governmental target on CBM production and utilization
  • China: Already active in CMM recovery and use with international funding
  • India: Exploring stage of CBM Field. Almost no utilization of CMM
  • Indonesia: Great interests in CBM and trying to develop.
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