Title Life-cycle assessment of CO2 mineralization product: comparing magnesia cement and portland cement /
Authors Onokwai, E ; Stasiulaitiene, I
DOI 10.15388/CCT.2023
ISBN 9786090708330
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Is Part of Chemistry and chemical technology: international conference CCT-2023, March 10, 2023, Vilnius: conference book.. Vilnius : Vilnius university press, 2023. P 056, p. 93.. ISBN 9786090708330
Abstract [eng] Portland cement (PC) is the most widely used type of cement globally, with a production of 4.1 billion tons in 2022 [1]. PC is made by heating limestone and clay at high temperature in a kiln, resulting in clinker which is then mixed with gypsum. However, its high CO2 emissions, which makes PC production one of the top three sources of anthropogenic CO2, have led to the search for alternatives [2]. Magnesia cement is regarded as a viable alternative to PC. Produced at lower temperatures and capable of absorbing CO2, it is made from magnesium oxide (MgO) found in magnesium silicates. The challenge in using magnesium oxide (MgO) as a raw material is the creation of cost-effective methods to separate it from silicates. A pilot project utilizing MgO from serpentinites through the Abo Akademi (ÅA) process routes is ongoing in Finland [3]. The environmental impact of such type a cement should not be forgotten as well. A study is being conducted to compare the environmental impact of both MgO cement produced through ÅA process routes and PC, using life cycle assessment based on the ISO 14040 and 14044 standards, with a functional unit (FU) of 1 ton of cement for each type. The selected system boundaries for the assessment includes all stages of production from raw material acquisition to packaging. The inventory analysis (Table 1) has been performed based on scientific literature [4-5] and own calculations. The environmental impact assessment has been performed with software SimaPro 9.0 (Pre Sustainability), Impact 2002+ method was selected for the calculations. The calculations revealed that MgO cement shows better environmental impact in terms of global warming potential and resources than PC. [...].
Published Vilnius : Vilnius university press, 2023
Type Conference paper
Language English
Publication date 2023
CC license CC license description