Overview

The scholarly article "Carbon capture and storage update," published in 2014 by Matthew E. Boot-Handford et al. in the journal Energy and Environmental Science, provides a comprehensive review of the state of carbon capture and storage (CCS) technologies. This work synthesizes developments in the field, offering insights into the technical, economic, and environmental aspects of CCS as a key strategy for mitigating climate change. The authors examine the progress made since earlier assessments, highlighting advancements in capture methods, transport infrastructure, and storage sites.

Carbon capture and storage involves capturing carbon dioxide (CO2) emissions from industrial and power generation sources, transporting it to a storage site, and injecting it into geological formations for long-term sequestration. The article discusses various capture technologies, including pre-combustion, post-combustion, and oxy-fuel combustion, each with distinct advantages and challenges. Pre-combustion capture involves converting fuel into a mixture of hydrogen and CO2 before combustion, while post-combustion capture extracts CO2 from flue gases. Oxy-fuel combustion burns fuel in pure oxygen, producing a flue gas primarily composed of CO2 and water vapor, simplifying the separation process.

The transport of CO2 is typically achieved via pipelines, ships, or trucks, depending on the distance and volume. The article emphasizes the importance of developing robust infrastructure to ensure efficient and cost-effective transport. Storage options include depleted oil and gas fields, saline aquifers, and unmineable coal seams. Each storage site has unique characteristics that influence its suitability for long-term CO2 sequestration. The authors also address the potential for enhanced oil recovery (EOR) as a means of utilizing captured CO2 while simultaneously storing it underground.

Economic considerations play a crucial role in the deployment of CCS technologies. The article reviews the costs associated with capture, transport, and storage, noting that while costs have decreased over time, they remain a significant barrier to widespread adoption. Policy mechanisms, such as carbon pricing and subsidies, are discussed as potential drivers for CCS implementation. Additionally, the article highlights the need for international cooperation to standardize regulations and facilitate cross-border CO2 transport and storage projects.

Environmental impacts of CCS are another focal point of the article. The authors assess the potential risks associated with CO2 leakage from storage sites and the effects on surrounding ecosystems. They also consider the energy penalty of CCS, which refers to the additional energy required to capture and compress CO2, thereby reducing the overall efficiency of power plants. Despite these challenges, the article underscores the potential of CCS to significantly reduce greenhouse gas emissions, particularly in hard-to-abate sectors like cement production and steel manufacturing.

In conclusion, "Carbon capture and storage update" by Boot-Handford et al. offers a detailed analysis of the current state of CCS technologies, emphasizing the need for continued research and development to overcome technical and economic hurdles. The article serves as a valuable resource for policymakers, industry stakeholders, and researchers seeking to understand the role of CCS in the global effort to mitigate climate change.

Publication details

The 2014 publication by Matthew E. Boot-Handford et al. in the journal Energy and Environmental Science serves as a foundational reference for the technical and economic assessment of carbon capture and storage (CCS) technologies. This work provides a comprehensive update on the state of CCS, detailing the progress made in separating, transporting, and storing carbon dioxide to mitigate greenhouse gas emissions. The authors analyze the various stages of the CCS value chain, highlighting the technological maturity and the remaining challenges that need to be addressed for large-scale deployment.

Technological Scope

Boot-Handford and colleagues examine the three main components of CCS: capture, transport, and storage. The capture phase involves separating CO2 from industrial and power generation sources, with technologies such as amine scrubbing, membrane separation, and cryogenic distillation being discussed. The transport phase covers the movement of CO2 via pipelines, ships, and trucks, with a focus on the infrastructure requirements and operational considerations. The storage phase explores geological formations suitable for long-term CO2 sequestration, including depleted oil and gas fields, saline aquifers, and unmineable coal seams.

Economic and Policy Context

The publication also addresses the economic and policy landscape surrounding CCS. The authors discuss the cost implications of implementing CCS technologies, including capital and operational expenses, as well as the potential for cost reductions through technological advancements and economies of scale. The role of policy mechanisms, such as carbon pricing, tax credits, and regulatory frameworks, is analyzed in the context of driving CCS adoption and investment. The work highlights the importance of international cooperation and standardization in facilitating the global deployment of CCS projects.

Impact and Legacy

The 2014 update by Boot-Handford et al. has been widely cited in subsequent research and policy discussions on CCS. It has contributed to the understanding of the technical feasibility and economic viability of CCS, influencing the design and implementation of CCS projects worldwide. The publication remains a key reference for researchers, policymakers, and industry stakeholders seeking to advance the role of CCS in the global energy transition. The insights provided in this work continue to inform the development of CCS technologies and the strategic planning required to integrate CCS into the broader climate change mitigation efforts.

What is carbon capture and storage?

Carbon capture and storage (CCS) is a climate mitigation technology designed to reduce greenhouse gas emissions from industrial and power generation sources. The process involves capturing carbon dioxide (CO2) at its point of origin, transporting it to a storage site, and injecting it into geological formations for long-term sequestration. CCS is distinct from other climate technologies such as carbon capture, utilization, and storage (CCUS), which emphasizes the industrial use of captured CO2, and direct air capture (DAC), which extracts CO2 directly from the ambient atmosphere rather than from concentrated point sources.

The CCS process consists of three main stages: capture, transport, and storage. In the capture stage, CO2 is separated from other gases produced by fossil fuel combustion or industrial processes. Common capture methods include post-combustion capture, where CO2 is removed from flue gases; pre-combustion capture, which converts fuel into a mixture of hydrogen and CO2; and oxy-fuel combustion, where fuel is burned in pure oxygen to produce a flue gas consisting mainly of CO2 and water vapor. Once captured, the CO2 is compressed into a supercritical fluid to reduce its volume and facilitate transport.

Transportation of CO2 typically occurs via pipeline, ship, or truck, with pipelines being the most common method for large-scale projects. The CO2 is then injected into deep underground geological formations, such as depleted oil and gas fields, saline aquifers, or unmineable coal seams. These formations are chosen for their porosity and permeability, which allow the CO2 to be stored securely over long periods. The storage process relies on several trapping mechanisms, including structural trapping, where the CO2 is held beneath an impermeable caprock; residual trapping, where CO2 becomes immobilized in pore spaces; solubility trapping, where CO2 dissolves in the formation water; and mineral trapping, where CO2 reacts with minerals to form stable carbonates.

CCS is considered a critical technology for achieving global climate goals, particularly in sectors where decarbonization is challenging, such as cement production, steel manufacturing, and natural gas power generation. The technology has been in development for several decades, with the first large-scale CCS project, the Sleipner project in Norway, commissioned in 1998. However, the widespread adoption of CCS has been influenced by various factors, including technological advancements, policy support, and economic incentives. As of 2014, the global CCS capacity was still relatively small, but the technology has seen significant growth in recent years, with numerous projects under development and operation worldwide.

The effectiveness of CCS in reducing CO2 emissions depends on several factors, including the efficiency of the capture process, the integrity of the storage site, and the energy penalty associated with the capture and compression stages. While CCS can significantly reduce the carbon footprint of fossil fuel-based industries, it is not a standalone solution to climate change. It is often viewed as a complementary technology to renewable energy sources and energy efficiency measures, providing a flexible approach to decarbonization across different sectors.

How does the article structure its review?

The 2014 review functions as a comprehensive update to the scientific and engineering consensus on carbon capture and storage (CCS), addressing the critical gap between theoretical potential and actual deployment. Rather than a static definition, the article structures its analysis around the evolution of CCS from a niche technological option to a cornerstone of climate mitigation strategies. It begins by contextualizing the urgency of CCS within the broader energy transition, highlighting the increasing reliance on fossil fuels despite the rise of renewables. This framing establishes CCS not merely as a technological fix, but as a systemic necessity for achieving global temperature targets.

The core of the review is organized around the three primary stages of the CCS value chain: capture, transport, and storage. For capture, the article distinguishes between post-combustion, pre-combustion, and oxy-fuel technologies, evaluating their respective energy penalties and cost structures. It updates previous knowledge by incorporating recent advancements in solvent-based capture and membrane separation, providing a clearer picture of the thermodynamic efficiencies involved. The transport section focuses on pipeline infrastructure and the emerging role of ship-based transport, emphasizing the logistical challenges of moving CO2 from point sources to storage sites.

Storage analysis is particularly detailed, examining geological formations such as depleted oil and gas fields, saline aquifers, and unmineable coal seams. The review integrates data on storage capacity and security, addressing concerns about leakage and long-term monitoring. It also discusses the role of enhanced oil recovery (EOR) as a financial driver for CCS deployment, illustrating the economic interplay between energy production and carbon sequestration.

Finally, the article assesses the policy and market mechanisms supporting CCS, including carbon pricing, tax credits, and regulatory frameworks. It highlights the disparity between policy ambition and actual investment, identifying key barriers to scaling up CCS projects. By synthesizing technical, economic, and policy dimensions, the review provides a holistic view of CCS, offering a roadmap for future research and deployment strategies. This structured approach ensures that readers gain a nuanced understanding of CCS’s potential and challenges in the global energy landscape.

See also