ABSORBSI H2S MENGGUNAKAN LARUTAN Fe-EDTA DALAM PACKED COLUMN

Abstract

<p><strong><em>Abstract:</em></strong><strong><em> </em></strong><em>Gas purification from the content of H<sub>2</sub>S using Fe-EDTA (Iron Chelated Solution) gave several advantages. The advantages were the absorbent solution can be regenerated that means a cheap operation cost, the separated sulfur was a solid that is easy to handle and is save to be disposal to environment. This research was done by simulation and experimental. The simulation step was done by mathematical model arrangement representing the absorption process in packed column through mass transfer arrangement such as mass transfer equations and chemical reaction. The experimental step was done with the making of Fe-EDTA solution from FeCl<sub>2</sub> and EDTA. Then Fe-EDTA solution was flown in counter current packed column that was contacted with H<sub>2</sub>S in the methane gas. By comparing gas composition result of experiment and simulation, the value of mass transfer coefficient in gas phase ( k<sub>Ag</sub>a), mass transfer coefficient in liquid phase (k<sub>Al</sub>a) and the reaction rate constant ( k) were found. The values of mass transfer coefficient in liquid phase (k<sub>Al</sub>a) were lower than values of mass transfer coefficient in gas phase (k<sub>Ag</sub>a) and the reaction rate constant (k). It meant that H<sub>2</sub>S absorption process using Fe-EDTA absorbent solution was determined by mass transfer process in liquid phase. The higher flow rate of absorbent, the higher value of mass transfer coefficient in liquid phase. </em><em>The smaller packing diameter, the higher value of mass transfer coefficient in liquid phase.From analysis of dimension, the relation of dimensionless number between Sherwood number and flow rate of absorbent, packing diameter was</em><strong></strong></p><p> <strong><em>Keywords:</em></strong><strong><em> </em></strong><em>chemical reaction, Fe-EDTA, H<sub>2</sub>S absorption, mass transfer</em></p>

Effect of coloring pH and mordant on fungal dyes quality using woolen yarn

“…strain 3 dye added with mordant alum, and T. harzianum dye added with mordant alum or FeSO4.7H2O at dyeing pH of 3, 6, and 9, other fungal dyes at pH 6 and pH 9 produced more faded colors on woolen yarn than pH 3. Unless M. purpureus dye at dyeing pH 3, woolen yarn mordanted with FeSO4.7H2O at different dyeing pH (3,6, and 9) exhibited darker colors than mordanted with alum. Dyeing pH of 3, 6, and 9 applications can replace adding mordant alum (1.2 %) for A. terreus, Aspergillus sp.…”

“…Dyeing: woolen yarn samples were treated with the different dyes of Aspergillus, M. purpureus, Paecilomyces, Penicillium, and T. harzianum at different dyeing pH (3,6, and 9) with a ratio of material to dye is 1:30. Dyeing process was carried out at 90 °C for 30 min and left overnight [15] with modification.…”

“…Natural dyes are derived from plants, animals, and microorganisms. Most of Indonesia's textile dyeing process uses natural dyes from plants [3,4], but only a few natural dyes are available in sufficient quantities for use in textile dyeing [5]. Therefore, it is necessary to exploit the use of other biological resources, such as fungi (molds and yeasts), bacteria, and algae.…”

“…strain 3, and Penicillium sp. strain 4UHB dyes treated with mordant alum and without mordant at different dyeing pH (3,6, and 9) each produced the same color shade on woolen yarn (160 A greyed-yellow, 160 B greyed-yellow, and 160 B greyed-yellow, 18 C yellow-orange, 27 B orange and 27 B orange, 22 A yellow-orange, 22 C yelloworange and 20 D yellow-orange, 69 B red-purple, 69 C red-purple, and 69 D red-purple). At dyeing pH 3, Penicillium sp.…”

The Effect of Acidity and Aging Time in The Synthesis of Al(OH)3 from The Anodized-waste with a Sol-Gel Method

“…Anodization is the process of electrolysis of the formation of an oxide layer in metals by reacting a metal, one of which is aluminum with oxygen from an electrolyte solution as a medium [1]. Anodized liquid waste contains a lot of dangerous heavy metals [2]. According to Naziruddin et al [3], the metals contained in anodized wastes was Al, Cu, Ni, and Zn.…”