The effects of biomass syngas composition, moisture, tar loading and operating conditions on the combustion of a tar-tolerant HCCI (Homogeneous Charge Compression Ignition) engine

S. Bhaduri, F. Contino, H. Jeanmart and E. Breuer

Energy, 2015, vol. 87, issue C, 289-302

Abstract: Syngas, from biomass gasification, needs to be purified of condensible tars before being used as a fuel for spark ignition engines. A novel tar tolerant system is being developed, wherein a (Homogeneous Charge Compression Ignition) HCCI engine is fueled by impure syngas at intake temperatures above the tar dew point, thus avoiding the condensation of tars and its consequent problems. This paper introduces the novel concept and studies the sensitivities of HCCI combustion to key context relevant issues such as the variations in the combustible composition (H2:CO ratio from 30:70 to 55:45%), moisture (upto 12% by volume) and tars (from 3 to 17 g/Nm3) at the intake temperatures of around 250 °C. The effects of intake temperatures (230–270 °C) and pressures (1.0–1.2 bar) are also studied. The experiments are carried out with artificial syngas on a 435 cc mono-cylinder HCCI engine with a compression ratio of 12 and operated at 1500 RPM. Indicated efficiencies about 34% and Indicated Mean Effective Pressures about 2.5 bar were achieved at equivalence ratios between 0.3 and 0.34. In the tested ranges, moisture delayed the combustion while the effect of tars were insignificant.

Keywords: Biomass; Gasification; Syngas; Tars; Water vapor; (Homogeneous charge compression ignition) HCCI (search for similar items in EconPapers)
Date: 2015
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (14)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544215005319
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:87:y:2015:i:c:p:289-302

DOI: 10.1016/j.energy.2015.04.076

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 ().