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A comparison of carbon footprints of magnesium oxide and magnesium hydroxide produced from conventional processes

Luong, Van-Tri and Amal, Rose and Jason, Scott and Ehrenberger, Simone and Tran, Tam (2018) A comparison of carbon footprints of magnesium oxide and magnesium hydroxide produced from conventional processes. Journal of Cleaner Production, 202 (20 Nov), pp. 1035-1044. Elsevier. DOI: 10.1016/j.jclepro.2018.08.225. ISBN 0959-6526 ISSN 0959-6526

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Official URL: https://www.sciencedirect.com/science/article/pii/S0959652618325745

Abstract

In this study, modelling the carbon footprints of magnesium oxide and magnesium hydroxide (>99% purity) production based on technologies treating bischofite brines (e.g. Aman process) and serpentinite ores (e.g. Magnifin process) was performed. The two technologies have been utilised by many producers around the world to deliver specialty magnesium products. Using theoretical values of heat of reaction obtained from HSC (H-enthalpy, S-entropy and Cp-heat capacity) software simulations and the practical thermal efficiency of roasting and pyrohydrolysis equipment, greenhouse gas (GHG) emissions of 2.7 e5.6 kg CO2eq/kg MgO and 1.6e3.3 kg CO2eq/kg Mg(OH)2 were estimated for the process treating a bischofite brine. The corresponding figures calculated for the process recovering magnesium values from a serpentinite ore were determined as 3.8e7.5 kg CO2eq/kg MgO and 2.6e5.2 kg CO2eq/kg Mg(OH)2. They are somewhat comparable to MgO's carbon footprint of 3.1e4.5 kg CO2eq/kg MgO from Chinese producers using one-stage magnesite calcination to produce caustic calcined magnesia (~92% purity). From a carbon footprint perspective, it is apparent that the brine process provides the lowest environmental burdens compared to the serpentinite and magnesite routes.

Item URL in elib:https://elib.dlr.de/121485/
Document Type:Article
Title:A comparison of carbon footprints of magnesium oxide and magnesium hydroxide produced from conventional processes
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Luong, Van-TriUniversity of New South Wales, Sydney, AustraliaUNSPECIFIED
Amal, RoseUniversity of New South Wales, Sydney, AustraliaUNSPECIFIED
Jason, ScottUniversity of New South Wales, Sydney, AustraliaUNSPECIFIED
Ehrenberger, SimoneSimone.Ehrenberger (at) dlr.deUNSPECIFIED
Tran, TamChonnam National University, Gwangju, South KoreaUNSPECIFIED
Date:22 August 2018
Journal or Publication Title:Journal of Cleaner Production
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:202
DOI :10.1016/j.jclepro.2018.08.225.
Page Range:pp. 1035-1044
Publisher:Elsevier
ISSN:0959-6526
ISBN:0959-6526
Status:Published
Keywords:Carbon footprint Magnesium oxide Magnesium hydroxide Bischofite brine Serpentinite
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Transport System
DLR - Research area:Transport
DLR - Program:V VS - Verkehrssystem
DLR - Research theme (Project):V - Verkehrsentwicklung und Umwelt II (old)
Location: Stuttgart
Institutes and Institutions:Institute of Vehicle Concepts > Fahrzeugsysteme und Technologiebewertung
Deposited By: Ehrenberger, Simone
Deposited On:13 Sep 2018 11:16
Last Modified:08 Oct 2018 13:19

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