Fluidized bed CaO hydration-dehydration cycles for application to sorption-enhanced methanation

A sorption-enhanced methanation concept has been recently presented, which is based on the employment of a sorbent able to capture in situ the H 2 O produced during the methanation reaction, in order to shift the equilibrium towards the formation of methane. In this work CaO, derived from natural li...

Full description

Saved in:
Bibliographic Details
Published in:Combustion science and technology 2019-09, Vol.191 (9), p.1724-1733
Main Authors: Coppola, A., Massa, F., Salatino, P., Scala, F.
Format: Article
Language:English
Subjects:
calcium oxide
Carbon dioxide
Catalysis
chemical looping
Dehydration
fluidised bed
Fluidized beds
Hydration
Limestone
Methanation
Organic chemistry
Sorbents
Sorption
Sorption-enhanced methanation
Steam
Temperature effects
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A sorption-enhanced methanation concept has been recently presented, which is based on the employment of a sorbent able to capture in situ the H 2 O produced during the methanation reaction, in order to shift the equilibrium towards the formation of methane. In this work CaO, derived from natural limestone, was tested as a possible sorbent material for H 2 O capture in a novel configuration based on the concept of chemical looping in dual interconnected fluidized bed systems. The lab-scale experimental campaign was focused on the study of the sorbent performance in terms of hydration and dehydration cycles at different operating conditions relevant for catalytic methanation. The effect of temperature on the sorbent performance, as well the presence of CO 2 in the reaction environment, were investigated. The results showed that CaO has good capacity to capture and release steam in the temperature range of interest. Unfortunately, even at the lowest temperatures tested, the sorbent is affected by the presence of CO 2 that worsen its performance in terms of H 2 O capture capacity.
ISSN:0010-2202
1563-521X
DOI:10.1080/00102202.2019.1640689