PARAMETRIC STUDY OF CEMENT RAW MATERIAL AS CALCIUM LOOPING SORBENTS

• Main Author: Setia Febriatna, Triya
• Format: Theses
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/65174
• Institution: Institut Teknologi Bandung

One of the causes of global warming is the greenhouse effect caused by greenhouses gases in the atmosphere. The main contributor of greenhouses gases is carbon dioxide (CO2). The cement industry is one of the industries that consistently produces the most significant CO2 emissions. The cement industry produces 5–8% of global CO2 emissions. Various methods have been applied to reduce the CO2 emissions of the cement industry. One of the methods is to use alternative fuels, from renewable energy and non-carbon fuels. The other method to reduce CO2 emissions is by capturing carbon dioxide from flue gas. The most potential carbon capture technology in the cement industry is calcium looping, which utilizes the reversible reaction between calcination and carbonation. This research conducted a calcium looping experiment using limestone from several cement factories in Indonesia. The experiments were carried out to study the potential of the limestones as carbon sorbents. The research was begun with designing and manufacturing a test bench that functions as a calciner and a carbonator (reactor for calcination and carbonation) for calcium looping experiments. Then the calcination and carbonation experiments were carried out using the test bench. XRD and SEM & EDS characterization were conducted to analyze experimental samples. The test bench was successfully manufactured and consisted of three central systems, a temperature control system, a gas supply system, and a pressure control system. The test bench has also functioned as a calciner and carbonator. The reactor as a calciner has converted CaCO3 become Ca(OH)2, and as a carbonator has succeeded in capturing carbon. That was indicated by adding an average carbon element of 5.13 %wt. Several operating parameters have influenced both reactions, such as pressure, temperature, duration, particle size, and reaction atmosphere. The experimental results show that limestone from cement plants can be calcium looping sorbents with an average reactivity of 59.01%. Limestone originating from Padang has the most significant potential with average reactivity of 89.06%.