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Removing Carbon Dioxide from the Air to Stabilise the Climate
Published in Subhas K Sikdar, Frank Princiotta, Advances in Carbon Management Technologies, 2020
Secure storage of CO2, meaning that it is removed from the atmosphere for a long time, is sometimes termed “sequestration” and CCS can also be taken to stand for Carbon Capture and Sequestration. Requirements for storage longevity, monitoring and verification are discussed in section 3.8. Another phrase sometimes encountered is Carbon Capture and Utilisation (CCU), describing the manufacture of products using biomass or captured CO2. The extent to which CCU can be regarded as either CCS or CDR depends on whether the product offers net long-term storage of CO2—this is discussed in sections 3.7 and 3.8.
Future Challenges for Life Cycle Assessment
Published in Surjya Narayana Pati, Life Cycle Assessment, 2022
Carbon Capture and Utilization (CCU) is an emerging field proposed for emissions mitigation and even negative emissions. These potential benefits need to be assessed by the holistic method of LCA that accounts for multiple environmental impact categories over the entire life cycle of products or services. However, even though LCA is a standardized method, current LCA practice differs widely in methodological choices.
Thermodynamic analysis of ethanol synthesis by CO2 hydrogenation using Aspen Plus: effects of tail gas recycling and CO co-feeding
Published in Chemical Engineering Communications, 2023
Yiming He, Weijie Fu, Zhenchen Tang, Shuilian Liu, Jian Chen, Qitong Zhong, Xing Tan, Ruiyan Sun, Chalachew Mebrahtu, Feng Zeng
Due to the rapid development of society and the economy, fossil resources are excessively consumed, leading to massive CO2 emissions. Accordingly, CO2 emissions cause serious environmental problems such as global warming and ocean acidification (Isah 2013; Olivier et al. 2017), which have threatened the sustainable development of human society. Carbon capture and utilization (CCU) technology, as an effective approach to reducing CO2 emissions, enables catalytic hydrogenation of CO2 to valuable products such as methane, low-carbon olefins, long-chain hydrocarbons, methanol, and higher alcohols (Rahman et al. 2017). Among them, ethanol possesses a high octane number, low environmental pollution, and less engine carbon deposition, being a promising sustainable fuel (Iodice et al. 2017). Therefore, using CO2 as a raw material to synthesize ethanol presents an important way to mitigate greenhouse gas emissions, meanwhile producing value-added sustainable fuels (Liu et al. 2023; Xi et al. 2021; Zeng et al. 2021). However, its industrial application is still absent due to the low CO2 conversion and ethanol selectivity.
Carbon capture and utilization technologies: a literature review and recent advances
Published in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2019
Francisco M. Baena-Moreno, Mónica Rodríguez-Galán, Fernando Vega, Bernabé Alonso-Fariñas, Luis F. Vilches Arenas, Benito Navarrete
Carbon Capture and Utilization (CCU) seeks not only to reduce the volume of emissions to the atmosphere but also to obtain a benefit through the use of CO2 in different types of industrial processes, replacing conventional raw materials (Aresta 2010; Bilgen 2016). These methods will not be enough to achieve the desired objective, but they could be the key to complement the use of carbon-free renewable technologies, together with the awareness of the population (Princeton University 2015). This paper analyzes the main available CCU technologies, as well as the innovative studies carried out so far by experts in this area. Finally, some Life Cycle Assessments (LCA) that have been done by other authors for promising CCU options are presented. The studied technologies have been grouped in four categories as shown in Figure 2: CO2 as a solvent, Chemicals from CO2, Fuels from CO2, and Enhanced Oil Recovery (EOR) & Enhanced Coal Bed Methane (ECBM).