Determination of Absorption Capacity and Mass Transfer Coefficient of Several Oils as Solvents for Biomass Gasification Cleaning System  

作　　者：Suhartono Herri Susanto Takao Kokugan 

机构地区：[1]Department of Chemical Engineering, Universitas Jenderal Achmad Yani, Cimahi 40531, Indonesia [2]Department of Chemical Engineering, Institute Teknologi Bandung, Bandung 40132, Indonesia [3]Department of Chemical Engineering, Tokyo University of Agriculture and Technology, Tokyo 184-5855, Japan

出　　处：《Journal of Chemistry and Chemical Engineering》2012年第4期327-335,共9页化学与化工（英文版）

摘　　要：With the aim to find an absorbing liquid suitable for the gas cleaning system in the application of gasification unit in a remote area, three types of oil were tested using a bubble column and a wetted wall column. Air streams containing toluene vapour with flowrates of 13.6 mL-min1 or 27.6 mL.min^-1 were bubbled through a 50 mL static oil in a glass tube at a temperature of 30 ℃ or 60 ℃. In experiments using the wetted wall column, air streams containing toluene were contacted with a falling thin film ofoil on the outer wall of a column with a diameter of 6.4 cm and two different contacting heights of 60 cm or 80 cm. Toluene concentrations in the air stream were adjusted in the range of 700-3000 ppm corresponding to a typical tars concentration in the producer gas. The phase equilibrium of toluene was represented as values of 1/tl of 326, 220 and 182 respectively for lubrication oil, palm oil and sunflower oil （H is Henry＇s constant with the toluene concentrations in g.L^-1 for liquid phase and g.Nm^-3 for gas phase）. From experiments using the bubble column, it was found that the overall mass transfer coefficient （Kc, a） was in the order of 10.3 cm3-min^-1 and the overall liquid phase mass transfer coefficient （KLa）was about 10.3 cm3.min^-1. Although lubrication oil had a slightly better absorption capacity than the other two tested oils, it had a lower mass trasfer coefficient than that of palm oil. All three proposed oils had a much better absorption capacity and absorption rate than that of water used conventionally as a scrubbing liquid in a small biomass gasification plant.

关 键 词：Henry＇s constant absorption of VOC scrubbing oil tars removal. 

分 类 号：TQ028.2[化学工程] S216[农业科学—农业机械化工程]