Technical and Environmental Analysis of Calcium Looping Carbon Capture for Rotary Kiln Lime Plants

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Abstract

Globally, Lime is an important substance that is used in many industries, such as in the food and construction industries, and in the manufacturing of steel, glass, and paper. The production of Lime produces a lot of carbon dioxide during the calcination process. Reducing CO2 emissions from the Lime industry is a step towards net zero carbon.
This work focuses on the technical and environmental evaluation for the integration of two calcium carbonate looping (CCL) technologies, Tail CCL with indirectly heated and integrated indirectly heated CCL. These technologies are compared against a base case Lime plant.
The technical analysis was carried out using the inhouse ECLIPSE software and the SimaPro© software was used for the environmental assessment. Data for the modelling was supplied by project partners, databases, and literature where necessary. The ReCiPe© endpoint method was used for assessment.
The main conclusions are that all carbon capture technologies studied lowered the environmental impact of the Lime plant, compared to the base case plant. The Tail CCL technology used more resources that the fully integrated CCL process, and had increased emissions, however, the Tail CCL processes generated much more heat that was suitable for electricity generation, which could be used for the utility consumption and export. Thus, reducing their environmental burden in line with that of the integrated CCL process.
Original languageEnglish
Title of host publicationSYMPOSIUM ON UK-LIME RESEARCH 2021
Publication statusPublished - 13 Oct 2021

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