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Caprock Systems for CO₂ Geological Storage

1 June 2011
Storage

The study involved a detailed literature review of recent and ongoing research in this topic, with engineering judgement drawn from the findings. The study focussed on caprocks in the context of CO₂ storage in deep saline formations, although depleted hydrocarbon fields were also considered, in the context of the associated wide body of available knowledge. Particular issues considered by the study included: Caprock characteristics for site selection purposes; Geomechanical, geochemical and other relevant processes, and their coupling into predictive performance models; Potential leakage pathways and mechanisms, including faults, fractures and by diffusion; Discussion of the time frames and rates of leakage for the various mechanisms and caprock systems; Best practices for caprock assessment including data collection and modelling methodologies.

Technical Report

Effects of Impurities on Geological Storage of CO₂

1 June 2011
Storage

Study on evaluation of the effects of impurities on CO₂ transport, injection and storage, sponsored by the International Energy Agency Greenhouse Gas R&D Programme (IEA GHG). The IEA GHG’s objectives of this study are: To provide a review of existing information and published research on the potential impact of CO₂ stream purity on storage reservoir and caprock performance and associated engineering costs; To provide a high level overview of available knowledge. The focus is on storage of impure CO₂ in deep saline formations, since this scenario has the largest theoretical storage capacity and the most significant potential for complex geochemical reactions, although depleted gas fields and CO₂-EOR are also relevant.

Technical Report

IEAGHG Seminar on Control of Nitrosamine Formation in CO₂ Capture Plant: Report on Meeting

1 June 2011
Capture
Event Proceedings

This workshop was held aiming to answer the following questions: What inputs can we expect in terms of NO2 levels and amine quality? How to improve the reliability and plausibility of nitrosamine analysis? What level of accuracy is possible in nitrosamine detection? Which concentration of nitrosamine can be expected until the first reclaimer operation? How can nitrosamine levels be minimized? How likely is the formation of volatile nitrosamine? How can we move forward with providing reliable information to the public?

Technical Report

Retrofitting CO₂ Capture to Existing Power Plants

1 May 2011
Capture

The main purpose of this report is to examine, at a generic level, the scope for cutting CO2 emissions from suitable existing fossil fuel plants by retrofitting CCS to them, as an alternative to replacing them with new build fossil fuel plants with CCS. In this context it should be seen as a discussion of preliminary screening assessment methods to address the general issue of ‘under what conditions might it be worth considering retrofitting CCS to an existing fossil power plant, instead of replacing it by a new plant with CCS’? As a generic study though it cannot address either future costs for construction, fuel etc. or site- and region-specific questions that will govern the feasibility and cost of a specific retrofit project, although it does discuss some of the principles involved and examine sensitivities. Nor does it make comparisons with other options for emission reductions from a particular site, such as fuel switching from coal to gas.

Technical Report

Summary Report of the IEAGHG Workshop - Natural Releases of CO₂: Building Knowledge for CO₂ Storage Environmental Impact Assessments

1 November 2010
Event Proceedings
Storage

The IEAGHG workshop on Natural Releases of CO₂: Building Knowledge for CO₂ Storage Environmental Impact Assessments was held in Maria Laach, Germany, in November 2011 and hosted by CO₂GeoNet and BGR. The workshop was well attended, with forty seven participants from over ten different countries. Sessions included: Setting the Scene; Releases, Magnitudes and Impacts: Marine Environments and Terrestrial Environments; Mobilisation of Brine and Metals; Near Surface vs. Deep Subsurface Mechanisms and, Monitoring Challenges in Light of Natural Systems. Due to considerable interest in the workshop and an overly prescribed agenda, poster sessions were included within coffee and lunch breaks, with eight presented posters during the workshop.

Technical Report

CCS Site Selection and Characterisation Criteria

1 December 2009
Capture
Storage

The I EA G reenhouse G as R &D P rogramme ( IEA GHG ) ha s recently co mmissioned the Alberta Research Council in Canada to conduct a review of storage site selection criteria and site ch aracterisation methods in o rder to produce a s ynthesis r eport. Among the va rious elements of the CO₂ capture and storage (CCS) chain, t he stage of storage site selection and characterisation is o f cr itical importance be cause any storage s ite m ust de monstrate that it satisfies three fundamental requirements: 1. capacity to store the intended volume of CO₂ 2. injectivity, to accept/take CO over the lifetime of the operation, 2 3. containment, to en sure t hat C O at the rate that it is supplied from the emitter(s), 2 will n ot m igrate an d/or leak out of t he s torage unit (safety and security of storage). This report reviews the literature on the subject on site selection and characterisation since the publication of the IPCC Special Report on CCS, and provides a synthesis and classification o f criteria.

Technical Report

CO₂ Storage in Depleted Oil Fields

1 December 2009
Storage

The study took as its starting point, IEA GHG Report on PH3/23 undertaken in 2000 as its base line data set. The study was to assess the data within the report and determine whether there was newer data on issues, (e.g. CO2 use/bbl oil produced in EOR floods) that could be used to revise global estimates.

Technical Report

OPEC-IEA GHG CCS workshop for scientists and professionals in OPEC Member Countries

1 December 2009
Event Proceedings
Industry Insights

This workshop was proposed to the IEA GHG by OPEC, and the first plan was to hold the workshop in February 2009, in Algeria. Due to difficulties in preparing invitation letters and visas; the workshop was postponed to November 2009. The suggestion was that Carbon Capture and Storage (CCS) was an important topic not being adequately dealt with by OPEC member countries. Therefore, this workshop was planned to introduce scientists and professionals from OPEC member countries with a general overview of the complete CCS chain. In addition, this workshop was considered as a good opportunity for IEA GHG to interact with professionals from these countries, who are involved mainly in the oil and gas sector. The Ministry of Energy and Mines together with Sonatrach, agreed to host the workshop in Hassi Messaoud, Algeria. An organizing committee was established, with members form IEA GHG, OPEC, the Ministry of Energy and Mines and Sonatrach. The workshop was held from the 16th to 20th of November, 2009 and attracted over 25 delegates from 7 countries.

Technical Report

5th Meeting of the Monitoring Network

1 November 2009
Event Proceedings
Storage

This was the 5th meeting of the IEA Greenhouse Gas R&D Programme (IEA GHG) Monitoring Network. Since the inception of the Monitoring Network a significant amount of work has been done in this field. There are now a great number of very elaborate Carbon Capture and Storage (CCS) demonstration projects occurring worldwide with each one developing and testing new monitoring techniques. While this is happening there is also a great drive from many Governments to put in place the regulations needed to properly licence and supervise CCS activities. This meeting hoped to review where we are with both aspects of CCS and identify what questions still need to be answered

Technical Report

Development of Storage Coefficients for Carbon Dioxide Storage in Deep Saline Formations

1 November 2009
Storage

The IEA Greenhouse Gas R&D Programme (IEA GHG) commissioned the Energy and Environmental Research Centre (EERC), from the University of North Dakota, to undertake a study to develop storage coefficients for carbon dioxide (CO2) storage in deep saline formations. The project was co-sponsored by the US Department of Energy (US DOE).

Technical Report

Evaluation of Novel Post-Combustion CO₂ Capture Solvent Concepts

1 November 2009
Capture

The purpose of this review was to outline the current state of knowledge and provide an assessment of the following aspects: Process chemistry and kinetics, • Operational issues and major development issues,Qualitative evaluation of the performance of absorber and stripper column,Safety and Environmental Impact considerations.Technology maturity and reported time scale for commercialisation. Assessments were made to identify the potential benefits, challenges, and uncertainties regarding the three processes described. Also included in this report is a brief review of the current state of knowledge of Flour’s Econamine FG+ process which was used as a baseline case for performance comparison. All assessments made in this report were based on information made available in the open literature, supported by kinetic evaluations made at SINTEF’s laboratory.

Technical Report

Techno-Economic Evaluation of Biomass Fired or Co-Fired Power Plant with Post-Combustion CO₂ Capture

1 October 2009
Capture
Costs of CCUS

The study aimed to investigate options and evaluate the techno-economic performance of a biomass fired, or coal co-fired with biomass, power plant based on current state of the art boiler and steam generation equipment incorporating CO₂ capture technology. It is expected that the study should provide the performance of the plant assuming the need to capture at least 90% of the total CO₂ emissions. Currently, the state of the art largest standalone biomass fired combustion power plant (i.e. between 100 to 250 MWe net) offered commercially is based on circulating fluidized bed (CFB) technology. In the mid-range (i.e. between 30 to 90MWe net), the commercially offered state of the art technology would be based on a bubbling bed fluidized bed (BFB) technology. For less than 50MWe net, a stoker fired (fixed bed) system is still considered competitive compared to any fluidized bed technology. For direct co firing of biomass and coal, the technical operating limit of co-firing biomass is about 10-20% of the total thermal input.

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