https://publikationen.bibliothek.kit.edu/1000050288/18451059

Renewable Power-to-Gas: A technological and economic review

This paper presents a first comprehensive comparison of environmental impacts of carbon capture and storage (CCS) and carbon capture and utilisation (CCU) technologies. Life cycle assessment studies found in the literature have been reviewed for these purposes. In total, 27 studies have been found of which 11 focus on CCS and 16 on CCU. The CCS studies suggest that the global warming potential (GWP) from power plants can be reduced by 63–82%, with the greatest reductions achieved by oxy-fuel combustion in pulverised coal and integrated gasification combined cycle (IGCC) plants and the lowest by post-combustion capture in combined cycle gas turbine (CCGT) plants. However, other environmental impacts such as acidification and human toxicity are higher with than without CCS. For CCU, the GWP varies widely depending on the utilisation option. Mineral carbonation can reduce the GWP by 4–48% compared to no CCU. Utilising CO2 for production of chemicals, specifically, dimethylcarbonate (DMC) reduces the GWP by 4.3 times and ozone layer depletion by 13 times compared to the conventional DMC process. Enhanced oil recovery has the GWP 2.3 times lower compared to discharging CO2 to the atmosphere but acidification is three times higher. Capturing CO2 by microalgae to produce biodiesel has 2.5 times higher GWP than fossil diesel with other environmental impacts also significantly higher. On average, the GWP of CCS is significantly lower than of the CCU options. However, its other environmental impacts are higher compared to CCU except for DMC production which is the worst CCU option overall.

Carbon capture, storage and utilisation technologies: A critical analysis and comparison of their life cycle environmental impacts

While Carbon Capture and Storage (CCS) technologies are being developed with the focus of capturing and storing CO2 in huge quantities, new methods for the chemical exploitation of carbon dioxide (CCU) are being developed in parallel. The intensified chemical or physical utilization of CO2 is targeted at generating value from a limited part of the CO2 stream and developing better and more efficient chemical processes with reduced CO2 footprint. Here, we compare the status of the three main lines of CCS technologies with respect to efficiency, energy consumption, and technical feasibility as well as the implications of CCS on the efficiency and structure of the energy supply chain.

/pdf/worldwide-innovations-in-the-development-of-carbon-capture-5311omzkbj.pdf

Worldwide innovations in the development of carbon capture technologies and the utilization of CO2

Sustainability assessment of energy systems: Integrating environmental, economic and social aspects

https://dspace.library.uu.nl/bitstream/handle/1874/32886/NWS-E-2008-71.pdf?sequence=1

Life cycle assessment of a pulverized coal power plant with post-combustion capture, transport and storage of CO2

https://www.pik-potsdam.de/members/edenh/publications-1/Viebahn_etal.pdf

Comparison of carbon capture and storage with renewable energy technologies regarding structural, economic, and ecological aspects in Germany

1. Speicherung erneuerbarer Energien fur Fluktuationsausgleich, Versorgungssicherheit und Netzstabilitat Ziel eines zukunftigen Energiesystems ist eine nachhaltige Vollversorgung aus erneuerbaren Ressourcen. Dabei sollen die Endenergien Strom, Warme und Kraftstoff jederzeit ohne Nutzungsbeschrankungen zur Verfugung stehen. Viele erneuerbare Energien (EE) wie z.B. Windkraft und Solarenergie fallen jedoch fluktuierend an. Die Losung liegt in der Energiespeicherung. So kann auch zu Zeiten mit einem geringen Angebot an EE (z.B. Windflaute) die Nachfrage gedeckt werden. Vorgestellt wird ein neuer Losungsansatz zur

https://www.fvee.de/fileadmin/publikationen/Themenhefte/th2009/th2009_05_06.pdf

Speicherung von Bioenergie und erneuerbarem Strom im Erdgasnetz

The invention relates to a method for producing a methane-rich product gas, in which a starting gas containing hydrogen and carbon dioxide is catalytically methanated under the influence of at least one adjustable parameter in at least two stages and at least one criterion relating to the composition of the product gas is monitored. The criterion is fulfilled under a condition influencing the method and when the condition changes, a change in the parameter setting that preserves fulfilment of the criterion is affected.

Method for producing a methane-rich product gas and reactor system usable for that purpose

RECCS : strukturell-ökomisch-ökologischer Vergleich regenerativer Energietechnologien (RE) mit Carbon Capture and Storage (CCS) ; Kurzfassung

Preparation of a product gas through thermochemical gasification of a carbon containing use material (preferably biomass) comprises: (a) a low temperature gasification of the carbon containing use material in presence of an exothermic carbon dioxide-bound absorber materials to give tar poor product gas; and (b) regeneration of the absorber material through a thermal desorption reaction under carbon dioxide release. An independent claim is also included for a device for the production of a product gas by thermochemical gasification of a carbon-containing used material (preferably biomass), under use of the preparation method, comprising at least a gasification reactor unit for the low-temperature gasification of the carbon-containing used material in presence of exothermal carbon dioxide-bound absorber substance for the production of a tar-poor product gas; and an arrangement for the periodic thermal desorption of the absorber substance under carbon dioxide-release.

Ulrich Zuberbühler

Papers

Comparison of carbon capture and storage with renewable energy technologies regarding structural, economic, and ecological aspects in Germany

Speicherung von Bioenergie und erneuerbarem Strom im Erdgasnetz

Method for producing a methane-rich product gas and reactor system usable for that purpose

RECCS : strukturell-ökomisch-ökologischer Vergleich regenerativer Energietechnologien (RE) mit Carbon Capture and Storage (CCS) ; Kurzfassung

Process and system for thermal gasification of compounds containing hydrocarbons