Towards commercialising underground coal gasification in the EU

Modern ‘enabling technologies’ and over a century of research and development have pushed underground coal gasification (UCG) beyond the proof-of-concept phase. Lessons learned from previous trials have demonstrated that UCG can exploit the energy stored in coal efficiently and with limited environmental impact compared with conventional coal-based energy technologies. Many countries in the EU (and worldwide) struggle to meet their energy needs despite containing very large reserves of coal, which cannot be exploited conventionally because of its depth. Application of modern UCG techniques, state-of-the-art drilling and monitoring technologies offer the opportunity to extract the energy from deep coal resources economically and with limited environmental impacts; however, several hurdles, such as public opinion and carbon dioxide (CO2) emission limits, must be overcome before UCG can be commercialised in the EU. Continued support by member states will attract more private investments, enable more field trials and allow Europe’s world-class UCG experts to demonstrate that the technology is ready to provide cleaner energy from coal for the EU in the twenty-first century. This is a review paper that aims to summarise the lessons learned from UCG trials and EU-sponsored work and to discuss what still needs to be done to commercialise UCG.

[1]  Simon Shackley,et al.  Public perceptions of underground coal gasification in the United Kingdom , 2006 .

[2]  Thomas Kempka,et al.  Carbon dioxide sorption capacities of coal gasification residues. , 2011, Environmental science & technology.

[3]  Paul L. Younger,et al.  Hydrogeological and Geomechanical Aspects of Underground Coal Gasification and its Direct Coupling to Carbon Capture and Storage , 2011 .

[4]  S. Julio Friedmann,et al.  PROSPECTS FOR UNDERGROUND COAL GASIFICATION IN CARBON-CONSTRAINED WORLD , 2009 .

[5]  Vasilis Sarhosis,et al.  Thermal–mechanical modelling around the cavities of underground coal gasification , 2014 .

[6]  D R Stephens,et al.  Underground coal gasification. , 1974, Science.

[7]  Paul L. Younger,et al.  Underground coal gasification with CCS: a pathway to decarbonising industry , 2010 .

[8]  J. Grabowski,et al.  GASIFICATION OF LIGNITE AND HARD COAL WITH AIR AND OXYGEN ENRICHED AIR IN A PILOT SCALE EX SITU REACTOR FOR UNDERGROUND GASIFICATION , 2011 .

[9]  Leonard Keith Walker Underground coal gasification: issues in commercialisation , 2014 .

[10]  Rafig Azzam,et al.  Sensitivity analysis on UCG–CCS economics , 2014 .

[11]  Thomas Kempka,et al.  Coupled hydro-thermal analysis of underground coal gasification reactor cool down for subsequent CO2 storage , 2013 .

[12]  Alexander Y. Klimenko,et al.  Forward and reverse combustion linking in underground coal gasification , 2008 .

[13]  R. Marsh,et al.  Experimental study on the impact of reactant gas pressure in the conversion of coal char to combustible gas products in the context of Underground Coal Gasification , 2015 .

[14]  Jie Liang,et al.  An Overview of the Chinese UCG Program , 2007, Data Sci. J..

[15]  Vasilis Sarhosis,et al.  Interdisciplinary studies on the technical and economic feasibility of deep underground coal gasification with CO2 storage in bulgaria , 2016, Mitigation and Adaptation Strategies for Global Change.

[16]  Gholamreza Zahedi,et al.  Underground coal gasification: From fundamentals to applications , 2013 .

[17]  R. J. Cena,et al.  Resource recovery and cavity growth during the Rocky Mountain 1 field test , 1988 .

[18]  Rafig Azzam,et al.  Development of a techno-economic model for dynamic calculation of cost of electricity, energy demand and CO2 emissions of an integrated UCG–CCS process , 2014 .