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All Journal IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Journal of Applied and Engineering Chemistry
Sri Haryati
Sriwijaya University
Biochemistry, Genetics & Molecular Biology Chemistry Environmental Science

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Pyrolysis of Vacuum Residue By Thermal and Catalytic Cracking Using Active Alumina Catalyst Isnandar Yunanto; Sri Haryati; Muhammad Djoni Bustan
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 4, No 1 (2019): February 2019
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v4.i1.29

Abstract

Vacuum Residue as feedstock derived from Pertamina Refinery Unit III was cracked in a fixed batch reactor under thermal and catalytic with single stage pyrolysis process using active alumina oxide (Al2O3) as a catalyst. The catalytic pyrolysis process carried out at a temperature 450°C in the presence of a varied catalyst to feed ratio 0.5-2.5 w/w% and varied of reaction times 5-30 minutes. While the thermal process performed under same operating conditions without presence the catalyst. The effect of alumina catalyst ratio on quantity and quality of yield product, the effect of operating conditions (reaction times) on yield distribution has been investigated. As a result, the cracked products are liquid, gas and coke residue. The yield of liquid products was dominant, the highest catalyst ratio showed the highest yield of the liquid product reached 63.1 wt% and the lowest yield of coke residue by 24.75 wt%. The highest yield of gas by 23.9 wt% was found at minimum catalyst used by 0.5 wt%
The Effect of Calcium Oxide and Aluminum Sulfate on Iron, Manganese and Color Removal at Peat Water Treatment Dedy Mulyadi; Sri Haryati; Muhammad Said
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 5, No 2 (2020): June 2020
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v5.i2.42

Abstract

The availability of clean water is a basic need for human life. Peat water is well-known as acidic water (low pH), high content of Fe2+ and Mn2+ and colored that make it hard to remove by conventional filtration method. Treatment in batch and continuous methods by using Calcium Oxide (CaO) and aluminum sulfate Al2 (SO4)3×18H2O result in significance reduce of iron and manganese. The batch method in particular, able to reduce iron from 3.5 ppm to 0.1 ppm (97%), manganese from 0.59 ppm to null (100%) and color from 130 TCU to 1.7 TCU. Turbidity also reduced from 33.8 NTU to 1.9 NTU whereas pH increase from 3.19 to 6.8. The continuous method in different circumstances shows iron removal from 3.35 ppm to 0.05 ppm (98.6%), manganese from 0.5 ppm to null (100%) whilst pH raised from 3.19 to 7.16 and turbidity decrease from 31.8 NTU to 1.14 NTU. Both results fulfill the water quality standard required by Permenkes No. 416/Menkes/1990
Pengujian Performance Adsorben Serat Buah Mahkota Dewa (Phaleria Marcocarpa (Scheff)) Dan Clay Terhadap Larutan Yang Mengandung Logam Kromium Sri Haryati
Journal of Applied and Engineering Chemistry Vol 1, No 1 (2011): Journal of Applied and Engineering Chemistry
Publisher : Journal of Applied and Engineering Chemistry

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Abstract

The adsorption method is very promising in the treatment of the industrial effluent containing hazardous metals because it provides a high absorption capacity. This study aims to separate the chromium ions from artificial wastewater solution through adsorption process using adsorbent mixtures of ‘mahkota dewa’ (Phaleria marcocarpa (Scheff)) and clay or loam soil. The effects of high flow rate and packing were experimentally investigated. The adsorption material was made through drying and mixing. This mixture will be used in the process of adsorption by the column bed. The experimental results showed that the amount of chromium ions are absorbed increases with increasing contact time. Reducing the concentration of chromium ions rapidly occur at regular intervals up to 30-40 minutes. The variation of flow rate indicates that the packing height of 60 cm and a flow rate of 2.32 ml/s the concentration of chromium ions are absorbed by 89.5195%. Keywords: Adsorption, mahkota dewa, clay, chromium
Co-Authors Dedy Mulyadi Isnandar Yunanto Muhammad Djoni Bustan Muhammad Said