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Permitting Issues for CO₂ Capture and Geological Storage

1 December 2005
Capture
Storage

The capture and storage of CO₂ in geological formations is a promising technology for reducing greenhouse gas emissions. Such projects will involve very large investments in plant, pipelines, wells and reservoir development. As with most large undertakings it will be essential to obtain permits for a whole range of activities which have to be carried out in order to implement such projects. Obtaining permits has been a major constraint on the rapid deployment of many new technologies and can cause considerable delay and effort even when implementing proven systems. To ensure that CO₂ capture and storage can be deployed successfully in the required timescales any issues that may arise during permitting of CO₂ capture and storage projects need to be identified as early as possible and permitting procedures developed and agreed. This study was commissioned to provide an overview of permitting issues in CCS projects and provide some guidance to operators and regulators who are concerned with the technology.

Technical Report

Development of PPAP - Power Plant Assessment Program

1 December 2005
Capture

The IEA Greenhouse gas R&D programme has conducted many studies on CO₂ capture from large power stations. Such studies are normally conducted by an experienced contractor and typically cost upwards of £40,000. In order to perform such studies leading to a capital costs estimate within +-30% it is necessary to have a reasonably detailed description of the process and all of the main equipment which is required. In addition the contractor needs to have a reliable database of cost information on the equipment. From time to time novel schemes are put forward but detailed evaluation is inhibited by the high cost of a full study. Furthermore factors other than cost may be important in determining how interesting a novel system is and it may be difficult to predict the cost of exotic equipment. IEAGHG thus developed a simple assessment program in order to be able to carry out a first screening of novel process without incurring large costs. This report summarises the work which has been done on the development of this computer program and the experience with using it on a number of novel schemes.

Technical Report

Low greenhouse gas emission transport fuels: the impact of CO₂ capture and storage on selected pathways

1 December 2005
Capture
Storage

In assessing the environmental impact of transport technology options, it is necessary to consider the impact of each of the stages of fuel extraction, refining, distribution and use in the vehicle. This needs to be done in a systematic way for the ‘novel’ systems considered, as well as for reference cases. The approach requires a form of life-cycle analysis which, in the transport, field has come to be known as Well-to-Wheels analysis (WTW). A subset of this analysis covers the production of the fuel up to the point where it is dispensed into the vehicle’s fuel tank – this is known as Well-to-Tank analysis; the second part of the chain is Tank-to-Wheels analysis (WTT and TTW respectively). In the main report the component WTT and TTW data are discussed in depth but in this overview the emphasis is on the overall WTW results.The study is set in the Netherlands; representative of a European location. The vehicle fleet for each type of fuel is assumed to be large enough that economies of scale can be expected in distribution and in vehicle costs. Some consideration is also given to how the results would be affected if set in a North American location.

Technical Report

CO₂ Capture in Low Rank Coal Power Plants

1 November 2005
Capture

Until now, IEA GHG’s studies on coal-based power plants with CO₂ capture have concentrated mainly on high rank (bituminous) coals but it is recognised that low-rank coals (sub-bituminous coal, lignite and brown coal) are important fuels for power generation in several countries. A study has therefore been carried out to estimate the performance and costs of low rank coal fired power plants with CO₂ capture based on various technologies. The study was carried out for IEA GHG by Foster Wheeler Italiana. This overview written by IEA GHG summarises the results of the study and puts them in context with results from other studies carried out recently by IEA GHG. More detailed technical information is included in the Executive Summary in Foster Wheeler’s report.

Technical Report

International Test Network for CO₂ Capture: Report on 8th Workshop

1 November 2005
Capture
Event Proceedings

This workshop was the eighth in a series to discuss co-operation in development of MEA and related solvents to capture CO₂ from power plant flue gases. The previous events were in Gaithersburg, Calgary, Apeldoorn, Kyoto, Pittsburgh, Trondheim, and Vancouver. Copies of all the reports from and including the Apeldoorn meeting are available on CD

Technical Report

A Review of Natural CO₂ Occurrences and Releases and their Relevance to CO₂ Storage

1 September 2005
Storage

The aim of this study was to evaluate natural occurrences of CO₂ leakage and compare and contrast them with engineered storage of CO₂ in geological formations. The objective of the study was to provide a reference manual for IEA Greenhouse Gas R&D Programme members and others interested in the subject, to provide a factual and balanced review of natural CO₂ releases and their relevance to geological CO₂ storage.

Technical Report

CO₂ Storage by Mineral Carbonation

1 September 2005
Storage
Utilisation

In 2000 the IEA GHG R&D programme issued a comprehensive report on technologies for capture of CO₂ using mineral carbonation. This report evaluated 6 candidate processes but concluded that only one process involving a hot melt of magnesium chloride showed any promise. Mineral carbonation is attractive as a CO₂ storage option because of its permanency but would involve mining, processing and re-depositing of massive quantities of material. In the mean time research has continued and it was felt that it was timely to conduct a more up to date study. As a first step a short review of recent developments and literature was commissioned to ascertain whether it was worthwhile going ahead with a full scale study.

Technical Report

Well Bore Integrity Workshop Houston, TX, USA, 4-5 April 2005

1 September 2005
Event Proceedings
Storage

The integrity of well bores, their long-term ability to retain CO₂, has been identified as a significant potential risk for the long-term security of geological storage facilities. A workshop was held in April 2005 to bring together over 50 experts from both industrial operators and from research organisations. Industrial operations are part of CO₂ enhanced oil recovery (EOR) projects or acid gas waste disposal projects. Current research includes laboratory investigations that attempt to simulate long-term geochemical and mechanical processes that may affect well completion materials – mainly cement; field studies of well completions that have been exposed to CO₂ during industrial projects as described above, and modelling studies, both of local reactions and upscaled simulations of leakage across basins.

Technical Report

Launch Meeting of the Risk Assessment Network

23 August 2005
Event Proceedings
Storage

This report summarises the major outcomes of the launch meeting of the Risk Assessment Network which was jointly organised by IEA GHG and TNO with the support of EPRI. It was held at the TNO offices in Utrecht, Netherlands, 23-24 August 2005. This international meeting was attended by 40 delegates from industry and research institutes drawn from nine countries.

Technical Report

Oxy-combustion Processes for CO₂ Capture from Power Plant

1 July 2005
Capture

The IEAGHG R&D programme has completed several studies on the costs of CO₂ capture from power plants using post combustion and pre-combustion capture technology. The costs of oxy-combustion capture have not been studied to the same depth because of the immaturity of the technology. Although commercial examples of the technology are still not in existence it is now felt that there has been sufficient advance in knowledge to attempt a cost study of similar accuracy. The process is applicable to both natural gas and coal fired power plant although the equipment used for the different fuels is quite different. There are many oxy-combustion process variants some of which are still in early stages of development. For example processes are proposed which use dense oxygen conducting membranes or recycle of water rather than CO₂. It would be difficult to generate firm costs for process using such novel elements. The brief given to the contractor was to select a gas fired and a coal fired process which would make use of existing designs and not represent any significant stepout beyond accepted limits. For the coal fired case this essentially means maintaining sufficient CO₂ recirculation so as not to radically alter velocities and heat fluxes in the radiant and convective parts of a conventional pulverized coal boiler. For the gas fired case which would be a combined cycle gas turbine with CO₂ recycle the situation is more difficult since a new gas turbine model would have to be developed. The brief was to base this machine on existing design limitations and practices so that the changes would be minimized. The commercial costing of this machine remains difficult since the price will be highly dependent on the size of the market.

Technical Report

Monitoring Workshop – Inaugural Meeting

1 March 2005
Event Proceedings
Storage

The objective of the workshop was to get a common understanding of the current state of the art, to identify the techniques available, and to assess their limitations. This was achieved by using the results available from projects that are currently monitoring injected CO₂. The aim was then to develop a view of where the technology needs to go from here, in order to develop stakeholder confidence that injected CO₂ can be monitored and verified and any leakage quickly detected

Technical Report

Natural Analogues for the Geological Storage of CO₂

1 March 2005
Storage

This is the final report of the Natural Analogues for the Storage of CO₂ in the Geological Environment (NASCENT) project. The Nascent project has studied natural accumulations of carbon dioxide (CO₂ – an important greenhouse gas, thought to be responsible for climate change) as analogues of the geological storage of anthropogenic CO₂ emissions.Before large-scale underground CO₂ storage can take place, it will be necessary to demonstrate that the processes are well understood, risks to the environment and human populations are low, and environmental disturbances can be minimised. One way of demonstrating that CO₂ can remain trapped underground for geologically significant timescales is to provide evidence from existing naturally occurring accumulations. These accumulations occur in a variety of geological environments and many can be demonstrated to have retained CO₂ for periods longer than those being considered for CO₂ storage.

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