Chemical looping beyond combustion: production of synthesis gas via chemical looping partial oxidation of methane

Abstract

Systematic development of Fe–Ni bimetallic carrier results in efficient and safe chemical looping process for methane partial oxidation to syngas.

Co3O4 nanoparticles as oxygen carriers for chemical looping combustion: A materials characterization approach to understanding oxygen carrier performance

“…(4)) [22], was only detected in trace amounts near the conclusion of these experiments (i.e., when oxygen was no longer available from the cobalt carrier). This suggests that Co 3 O 4 does not promote the partial oxidation of CH 4 , which we interpret as evidence of a relatively fast rate of oxygen release from the lattice of cobalt oxides under these operating conditions.…”

Progress in oxygen carrier development of methane-based chemical-looping reforming: A review

“…However, SRM is an energy intensive process due to the endothermic nature of this reaction as well as the necessary downstream refinement required to yield a syngas ratio (H 2 /CO) of 2, which is favored for the subsequent gas-to-liquid (GTL) processes [27,28]. As a promising alternative, catalytic partial oxidation of CH 4 (POM) has attracted great attention over the past decades [29][30][31][32]. Through a simple and one-step reaction, CH 4 can be directly converted with oxygen to produce syngas typically over a noble metal (such as Pt, Pd, Rh and Ru) based catalyst.…”

“…In order to effectively utilize OC for selective POM, it is thus crucial to figure out the product spectrum at different stages of OC reduction. This is more important in a fixed-bed process, in which the gradient in the oxidation state of the OC along the bed axis can result in the onset of coking on the over-reduced OC at the bed inlet, while the OC in the other part of the bed remains only partially reduced [29].…”

“…However, Ni-based OCs are essentially unselective for POM. Even the presence of a relatively small amount of NiO can completely control the selectivity of the reaction and drive it toward the total oxidation of CH 4 [29].…”

“…Bhavsar and Veser [29] subjected 0.1 g Fe 2 O 3 -CeO 2 in a fixed-bed reactor for extended reduction with CH 4 (16.7 vol.%, 1 ml/min) at 900°C. Fig.…”