Multi-function of oxygen carrier for in-situ tar removal in chemical looping gasification: Naphthalene as a model compound

Jimin Zeng, Jiawei Hu, Yu Qiu, Shuai Zhang, Dewang Zeng and Rui Xiao

Applied Energy, 2019, vol. 253, issue C, -

Abstract: Investigating the multi-functions of the oxygen carrier (OC) on in-situ tar conversion during chemical looping gasification (CLG) is crucial for the improvement of the syngas quality and the efficiency of the operation. In this paper, the tar reactions during the CLG process caused by three different OCs (iron oxide, nickel oxide, and copper oxide) was studied using naphthalene as a model compound. The functions of the metal and the lattice oxygen for the conversion were discussed, respectively. The stoichiometric ratio between the OC and the tar was identified. The reaction route and the oxygen transfer during the process was proposed. The results showed that the tar conversion on the metal-phase OC was 40–50%, while the conversion was over 90% with sufficient lattice oxygen. Reduced OCs led to a typical product composition: 18.49% CO2, 35.84% CO, and 45.67% char. There were at most two different phases of the OC after the reactions, for instance, Fe and FeO, FeO and Fe3O4, Fe3O4 and Fe2O3. The char composition for three reduced points (A06, A08, and A10) was 44.20%, 45.67%, and 46.19%, respectively. The result improved the reacting understandings of in-situ tar removal during the CLG process.

Keywords: Oxygen carrier; In-situ tar removal; Chemical looping gasification; Naphthalene (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (8)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0306261919311766
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:appene:v:253:y:2019:i:c:2

Ordering information: This journal article can be ordered from
http://www.elsevier.com/wps/find/journaldescription.cws_home/405891/bibliographic
http://www.elsevier. ... 405891/bibliographic

DOI: 10.1016/j.apenergy.2019.113502

Access Statistics for this article

Applied Energy is currently edited by J. Yan

More articles in Applied Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().