Title:
Air Gasification of Railroad Wood Ties: Influence of Additives on Tar Removal in a Two-Stage Gasifier
Author(s):
Mun, T.-Y., Kim, J.-W., Kim, J.-S.
Document(s):
Paper
Abstract:
Railroad wood ties treated creosote poses a significant problem in its treatment in South Korea. In the work, air gasification of railroad wood ties treated creosote were conducted in a two-stage gasifier consisting of a bubbling fluidized bed zone and a tar cracking zone with various additives in order to achieve two aims, the production of a high-quality producer gas having low tar and high caloric value, and the determination of the optimal operation conditions and combination of additives for the high quality of producer gas. In the experiments, the comparison of sand and calcined dolomite as bed materials was performed, and the effects of bottom-reactor temperature and equivalence ratio, on the producer gas composition and tar removal were investigated. Additionally, the effects of additives, activated carbon, commercial bio-char and dolomite as additives in the tar cracking zone were examined. As a result, the producer gas obtained with the application of dolomite as bed material and activated carbon in the upper reactor at an ER of 0.19 had the largest H2 concentration about (29 vol.%) and CO content (27 vol.%). Additionally, the combination of dolomite as the bed material and activated carbon in the tar-cracking zone gave the best tar removal efficiency (92%).
Keywords:
activated carbon, additives, gasification, tar removal
Topic:
Biomass Conversion Technologies for Heating, Electricity and Chemicals
Subtopic:
Gasifier performance and pilots
Event:
19th European Biomass Conference and Exhibition
Session:
OA5.2
Pages:
907 - 911
ISBN-13:
978-88-89407-55-4
ISBN-10:
88-89407-55-7
Paper DOI:
10.5071/19thEUBCE2011-OA5.2
Price:
FREE
