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Appl. Sci. 2019, 9(8), 1576;

Partition of Cu and Pb in a Two-Stage Fluidized-Bed Waste Gasification System

Department of Civil and Environmental Engineering, National University of Kaohsiung, Kaohsiung 811, Taiwan
Environmental Protection Bureau, Kaohsiung City Government, Kaohsiung 833, Taiwan
Author to whom correspondence should be addressed.
Received: 22 February 2019 / Revised: 11 April 2019 / Accepted: 12 April 2019 / Published: 16 April 2019
(This article belongs to the Special Issue Techniques for Sustainable Processing of Natural Resources)
PDF [976 KB, uploaded 16 April 2019]


In this study, a two-stage fluidized-bed gasification system was used to determine the distribution of heavy metal contaminants in simulative waste and evaluate the effect of the bed operating temperature, Equivalence ratio (ER), and Steam/Biomass ratio (S/B) in stage 1. The heavy metal concentrations in bed materials and fly ash were measured in two stages. The results show that as the operating temperature of stage 1 increased, the quantity of heavy metals entrapped by stage 1 bed material decreased, while that captured by stage 2 bed material increased. The less volatile Cu was mostly entrapped in stage 1 bed material. The ER and S/B results show that increasing the ER and S/B caused a slight increase in the concentrations of heavy metals entrapped in stage 1 and stage 2 bed materials. However, the influences of ER and S/B were less than that of temperature. The major factors affecting the heavy metal distribution were the operating temperature and the heavy metal volatility. Stage 2 bed material was able to entrap gaseous heavy metals or particles containing heavy metals by particle filtration and chemical adsorption. Thus, the heavy metals (Cu and Pb) had a downward trend after passing through stage 2. View Full-Text
Keywords: two-stage gasifier; heavy metal; waste; syngas; pollutant two-stage gasifier; heavy metal; waste; syngas; pollutant

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Lin, C.-L.; Chou, J.-D.; Weng, W.-C. Partition of Cu and Pb in a Two-Stage Fluidized-Bed Waste Gasification System. Appl. Sci. 2019, 9, 1576.

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