Sequestration of simulated carbon dioxide (CO2) using churning cementations waste and fly-ash in a thermo-stable batch reactor (TSBR)

Tiwari, Shaniv Kumar and Giri, Balendu Shekher and Thivaharan, Varadavenkatesan and Srivastava, Amitabh Kumar and Kumar, Sunil and Singh, Rajendra Prasad and Kumar, Rajesh and Singh, Ram Sharan (2020) Sequestration of simulated carbon dioxide (CO2) using churning cementations waste and fly-ash in a thermo-stable batch reactor (TSBR). Environmental Science and Pollution Research. ISSN 0944-1344

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Abstract

The degrees of mineral carbonation in (a) construction and demolition waste (C&DW) and (b) a mixture of cement and fly ash were studied through a dynamic experimental method to determine the variation in the rate and extent of CO2 sequestration achievable under simulated outdoor conditions. A number of experiments were performed in a self-designed rotating batch reactor by churning the two samples together with CO2, which was passed through the mixtures by using water vapor as the medium of transfer. At an injection flow rate of 1 L/min for CO2, the theoretical extent of carbonation was observed to be 39.1% for the mixture of cement and fly ash and 25% for C&DW. It was further observed that upon increasing the CO2 flow rate to 10 L/ min, the carbonation in the mixture of cement and fly ash increased by 37.2% after 15 h of rotation at 60 rounds per hour (rph) for a temperature of 40 °C. Weighing, scanning electron microscopy (SEM), and energy dispersive spectrometry (EDS) were performed for the samples before and after the batch reaction to study the quantitative, qualitative and morphological aspects of the process.

Item Type: Article
Uncontrolled Keywords: Construction and demolition waste . Mineral carbonation . CO2 sequestration . Climate change . Carbon capture and storage
Subjects: Engineering > MIT Manipal > Biotechnology
Depositing User: MIT Library
Date Deposited: 24 Jul 2021 06:17
Last Modified: 24 Jul 2021 06:17
URI: http://eprints.manipal.edu/id/eprint/157056

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