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2 results on '"oil scrubber"'

1. De-dusting in biomass gasification process using a coated bag filter.

Author

Kim, Joon Yub, Jo, Young Min, and Kim, Sang Bum

Abstract

The gasification process of solid refuse fuel (SRF) releases tar and particulate pollutants in addition to many gaseous pollutants. This study investigated the effectiveness of pre-coating on a fabric filter for dust collection instead of a combined control process involving a wet scrubber and a bag filter. The powder layer composed of hydrated lime, wood char, or activated carbon contributed to reduce the blocking of the open pores of the fabric filter by tar and particulate matter. Among the three materials, hydrated lime was accumulated the most, resulting in a 0.7-mm coating thickness. The filter made of polyphenylene sulfide was the most effective in collection efficiency (86%) for the allowable pressure drop (60 mmH2O). Since a single filter with pre-coating is highly efficient, an oil scrubber with a removal efficiency of 2% to 3% is not essential. [ABSTRACT FROM AUTHOR]

Published
2022
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2. Influence of Solvent Temperature and Type on Naphthalene Solubility for Tar Removal in a Dual Fluidized Bed Biomass Gasification Process

Author

Tonpakdee, P., Hongrapipat, J., Siriwongrungson, V., Rauch, R., Pang, S., Thaveesri, J., Messner, M., Kuba, M., and Hofbauer, H.

Subjects
oil scrubber, Chemical engineering, tar removal, dual fluidized bed biomass gasification, ddc:660, naphthalene, food and beverages, solvent scrubbing, complex mixtures
Abstract

Tar condensation is a cause of blockage in downstream application of the gasification process. An oil scrubber is considered as an effective method for tar removal. In this research, the naphthalene solubility in different local Thai oils and water was investigated in a laboratory-scale test-rig. The solubility value was conducted at 30, 50, 70, and 80°C. Biodiesels investigated were rapeseed methyl ester (RME) and two different palm methyl esters (PME 1 and PME 2). Furthermore, vegetable oils including sunflower oil, rice bran oil, crude palm oil, and refined palm oil were examined. The results showed that higher temperature enhanced naphthalene solubility in all types of investigated oils. Biodiesel has the highest value of naphthalene solubility. All scrubbing oils have similar naphthalene solubility trends at the temperature range of 50-80°C in the order of RME > PME 1 > PME 2 > diesel > sunflower oil > refined palm oil > rice bran oil > crude palm oil. Based on these experimental investigations, PME 1 has a naphthalene solubility value similar to RME. Therefore, PME 1 has been selected to be tested as scrubbing solvent in the 1 MWel prototype dual fluidized gasifier located in Nong Bua district, Nakhon Sawan province, Thailand.

Published
2021
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