Title

Thermal decomposition of (NH4)(2)SO4 in presence of Mn3O4

Authors

Authors

L. Q. Mao; A. T-Raissi; C. P. Huang;N. Z. Muradov

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

Int. J. Hydrog. Energy

Keywords

Hybrid cycle; Water-splitting cycle; (NH4)(2)SO4; Mn3O4; Thermal; decomposition; HYDROGEN-PRODUCTION; THERMOCHEMICAL CYCLES; SOLAR; WATER; Chemistry, Physical; Electrochemistry; Energy & Fuels

Abstract

The main objective of this work is to develop a hybrid water-splitting cycle that employs the photon component of sunlight for production of H-2 and its thermal (i.e. IR) component for generating oxygen. In this paper, (NH4)(2)SO4 thermal decomposition in the presence of Mn3O4, as an oxygen evolving step, was systematically investigated using thermogravimetric/differential thermal analyses (TG/DTA), temperature programmed desorption (TPD) coupled with a mass spectrometer (MS), X-ray Diffraction (XRD), and X-ray Photoelectron Spectroscopy (XPS) techniques. Furthermore, thermolysis of ammonium sulfate, (NH4)(2)SO4, in the presence of Mn3O4 was also investigated by conducting flow reactor experiments. The experimental results obtained indicate that at 200-450 degrees C, (NH4)(2)SO4 decomposes forming NH3 and H2O and sulfur trioxide that in the presence of manganese oxide react to form manganese sulfate, MnSO4. At still higher temperatures (800 similar to 900 degrees C), MnSO4 further decomposed forming SO2 and O-2. Copyright (C) 2010, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights

Journal Title

International Journal of Hydrogen Energy

Volume

36

Issue/Number

10

Publication Date

1-1-2011

Document Type

Article

Language

English

First Page

5822

Last Page

5827

WOS Identifier

WOS:000290922600009

ISSN

0360-3199

Share

COinS