Transformation of low-rank coal to clean syngas and power via thermochemical route

Muflih A. Adnan, Arif Hidayat, Mohammad M. Hossain and Oki Muraza

Energy, 2021, vol. 236, issue C

Abstract: An emerging gasification was proposed for the transformation of low-rank coal to clean syngas and electricity. The excess heat from char combustion was used to evaporate moisture in coal and to generate power via steam turbine generator. The simulation was developed in the Aspen Plus based on the proper thermodynamic model. The validation exhibited a good concurrence between the present model and the experiments under the same condition with the relative error <10% in the pyrolysis stage. The moisture content reduced the energy efficiency by ∼10% but increased the H2 production by ∼50% which results in the increase of H2/CO up to 10. The highest energy and exergy efficiencies (91% and 79%, respectively) was observed on the O2 equivalence ratio and steam to ratio of 0.21 and 0.06, respectively. O2 is an appropriate gasifying agent to produce syngas as the energy source, while steam gives high-quality syngas as the feedstock for chemical industries. The CO2 emission of the proposed configuration is below 50 kg CO2/GJ (half of the conventional coal combustion, ∼100 kg CO2/GJ) when the fraction of char to combustor is less than 0.4.

Keywords: Thermochemical conversion; Carbon conservation; Low-rank coal; Thermodynamic analysis; Clean technology (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544221017539
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:energy:v:236:y:2021:i:c:s0360544221017539

DOI: 10.1016/j.energy.2021.121505

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

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