Sulfur Transfer Characteristics and Pyrolysis Simulation in the Coal Polygeneration Process

DOI

10.2991/coal-16.2016.75How to use a DOI?

Keywords

Polygeneration; Circulating ash; Sulfur transformation; Heat transfer; Volatile evolution

Abstract

In the polygeneration process of coal pyrolysis/circulating fluidized bed (CFB) combustion, the sulfur transformation characteristics and a heat transfer, reaction, pyrolysis mathematical model for the non-isothermal coal particles has been studied. The results show that, the circulating ash was effective in capturing the gaseous sulfur. The sulfur fixed in ash was increased by the increase in pyrolysis temperature and the decreased in ash particle size. CaO and Fe2O3 in circulating ash displayed significant effect of sulfur retention. The pyrolysis model calculated that, the maximum temperature difference between the core and surface of coal (5 mm) has reached 440 K at the bed height of 0.02 m. The layer closer to the coal core has a higher but later peak value of the devolatilization rate. The temperature of pyrolysis gas and circulating ash is always close.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Download article (PDF)

TY  - CONF
AU  - Zhang Yaqing
AU  - Zhu Jialong
AU  - Liang Peng
PY  - 2016/10
DA  - 2016/10
TI  - Sulfur Transfer Characteristics and Pyrolysis Simulation in the Coal Polygeneration Process
BT  - Proceedings of the 8th Russian-Chinese Symposium “Coal in the 21st Century: Mining, Processing, Safety"
PB  - Atlantis Press
SP  - 392
EP  - 397
SN  - 2352-5401
UR  - https://doi.org/10.2991/coal-16.2016.75
DO  - 10.2991/coal-16.2016.75
ID  - Yaqing2016/10
ER  -