Enhanced process integration of black liquor evaporation, gasification, and combined cycle

Arif Darmawan, Flabianus Hardi, Kunio Yoshikawa, Muhammad Aziz and Koji Tokimatsu

Applied Energy, 2017, vol. 204, issue C, 1035-1042

Abstract: Energy recovery from black liquor (BL) can be performed through gasification at temperatures above the melting point of inorganic chemicals. Complementarily to BL gasification experimental research, this study is conducted to simulate the thermodynamic modeling of an integrated system for BL evaporation, gasification, and combined cycle for power generation. For BL evaporation, a novel system is proposed based on the concept of exergy recovery to minimize exergy loss, and thus, lower the required energy input for evaporation. From the process design and calculations, higher target solid content leads to lower total required energy for BL evaporation. The lowest required total energy for evaporation can be achieved at a target solid content of 75wt% wb. Furthermore, an integrated power generation system adopting gasification and combined cycle is modeled, and an application of different BL evaporation technologies is also evaluated in terms of net energy efficiency. The integrated system with exergy recovery-based evaporation can achieve a net energy efficiency of 34.5%, which is significantly higher than those of multi-effect evaporators (24.5%) and conventional boiler-based evaporation (14.7%).

Keywords: Black liquor; Evaporation; Gasification; Exergy recovery; Energy efficiency; Power generation (search for similar items in EconPapers)
Date: 2017
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/S0306261917305561
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:204:y:2017:i:c:p:1035-1042

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.2017.05.058

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 ().