Exploration in ash-deposition (AD) behavior modification of low-rank coal by manure addition

Fenghai Li, Chaoyue Zhao, Qianqian Guo, Yang Li, Hongli Fan, Mingxi Guo, Lishun Wu, Jiejie Huang and Yitian Fang

Energy, 2020, vol. 208, issue C

Abstract: High-alkali low-rank coal aggravates ash deposition (AD) during conversion. To mitigate AD formation during its gasification, the AD characteristics of Xiaolongtan lignite (XLT) and Yima coal (YM), their variations from chicken or pig manure addition under a reducing atmosphere, and their mechanisms were investigated by using ash fusion temperature tester, self-made AD analyzer, and X-ray diffractometer. The results indicated that the mass fraction of AD (MAD) of XLT was higher than that of YM because of the XLT with a high Ca, Fe, Na, and K content. At a low temperature (<950 °C), MAD increased with an increasing content of Na, K, and Fe due to their low melting-point eutectic formations; the MAD decreased with an increase in ash fusion temperature at a high temperature. The MAD of the XLT or YM decreased rapidly (1%–10%) and then decreased slowly (10%–15%) with manure ash addition. The XLT MAD decreased 50.32% for 4.93% chicken manure (CM) addition at 1000 °C. High-P and -Ca CM addition caused the formations of high melting-point Ca3P2O8 and KCaPO4, which inhibited alkali silicate generation and made the MAD decrease. Manure addition can mitigate AD formation effectively during low-rank coal gasification.

Keywords: Ash deposition; Low-rank coals; Manures; Modification mechanism; Phosphate (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (7)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544220314006
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:208:y:2020:i:c:s0360544220314006

DOI: 10.1016/j.energy.2020.118293

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 ().