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Iqbal Syaichurrozi
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World Chemical Engineering Journal
Published by Universitas Sultan Ageng Tirtayasa
ISSN : -     EISSN : 24432261     DOI : https://dx.doi.org/10.62870/wcej.v8i1.26617
Core Subject : Engineering,
Chemical Engineering, Chemistry & Bioengineering
WCEJ publishes original papers and reviewed papers on the fundamental, theoretical as well as applications of Chemical Engineering. WCEJ is published two times a year. This journal covering some aspects of chemical engineering, which are environmental chemical engineering, chemical reaction engineering, bioprocess-chemical engineering, materials synthesis and processing.
Arjuna Subject : Teknik Kimia (semua kategori) - Teknik Kimia (Lain-Lain)
Articles 85 Documents
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Synergistic Ability of Tannin – Silica as a Corrosion Inhibitor with the Addition of KI to Mild Steel in Demineralized Water Arief, Hendra; Pramudita, Marta; Pitaloka, Alia Badra
World Chemical Engineering Journal VOLUME 7 NO.1 JUNE 2023
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/wcej.v7i1.20626

Abstract

The rapid industrial growth in Indonesia today requires effective and efficient operating and maintenance conditions. The application of corrosion protection in cooling towers and boilers shows that inhibitor materials such as nitrates, nitrites and chromates must be used in large concentrations; these inhibitors also cause environmental pollution. For this reason, bio-inhibitors derived from natural ingredients have begun to be developed. Tannins and silica are widely known as effective inhibitors in controlling carbon steel corrosion. The synergistic mechanism of inhibitors is known to increase the effectiveness of inhibitory substances. This study aims to study the effectiveness and understand the mechanism of tannin and silica inhibitors and the effect of adding potassium iodide. as a synergistic inhibitor. This study used samples of mild steel carbon steel with demineralized water media at a temperature variation of 30-60oC and immersion time of 1, 2 and 3 hours. Variations in the concentration of tannins and silica used are 0-1250 ppm, and the corrosion measurement method uses the weight loss method. The results showed that adding potassium iodide. They have increased the ability of mild steel corrosion inhibitors produced by tannin-silica synergy. The corrosion rate of mild steel can be reduced by 82.95% at a concentration of tannin-silica-KI 1250 ppm. Therefore, tannin-silica synergy with the addition of potassium iodide. It has the potential to be a good alternative in the use of corrosion inhibitors for mild steel in demineralized water.
Performance Test of Biomass Cookstove with Torrefied Rice Husk as Fuel Using Water Boiling Test Method Alwan, Hafid; Irawan, Anton; Santika, Santika; Nurindah, Erlin
World Chemical Engineering Journal VOLUME 4 NO. 1 JUNE 2020
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v4i1.10585

Abstract

One of the way to increase effectiveness and efficiency of using biomass as fuel is through gasification cookstove technology. Gasification cookstoves is tools used to convert biomass into combustible gases via thermochemical pathline. Rice husk is a type of biomass that has a low heating value of 14 MJ/Kg. Therefore, it is necessary to pre-treat it through torefaction to increase the calorific value of the fuel so that it can increase the thermal efficiency of the gasification cookstove. This research was conducted to obtain the optimum conditions for air flow rate, height of the bed, and fuel type of rice husk torrefied. This research was conducted by inserting rice husk torrefied as fuel with a variation of height of the bed 42.6 cm; 31.5 cm; and 21.3 cm, the secondary air flow rate openings (full open; partial open; close), and type of fuel used is the rice husk torrefied at temperature 250 oC for 60 minutes (fuel A), and temperature 300 °C for 30 minutes (fuel B). The optimum operating conditions were found at 21.3 cm of bed height, full close secondary air opening, with type A fuel. While the highest efficiency value of 18.75% was found in type A fuel, with bed height 31.5 cm, and secondary air opening is full close.
Rice Husk Extract and Damar Resin as Corrosion Preventing Bio Coating Materials for Mild Steel in NaOH Solution Pramudita, Marta; Novita, Lita; Ernawati, Hera; Hidayatullah, Andra; Pitaloka, A.B.
World Chemical Engineering Journal VOLUME 6 NO. 1 JUNE 2022
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v6i1.15713

Abstract

Corrosion is damage due to chemical reactions between metals or metal alloys with their environment. The use of coatings can reduce the rate of corrosion, but it is constrained by stability for a long time, so it is necessary to try other protections against mild steel that can cover the metal with a coating material. This research focuses on mild steel's bio coating expertise using 1M NaOH corrosive media using natural ingredients of rice husk extract and dammar resin. Rice husk and resin are plants that can be used as bio coating materials. Rice husk extract contains several compounds that can be used to inhibit the corrosion rate, one of which is silica. In contrast, dammar resin is a natural polymer with flexible and stable properties that can prevent corrosion. This study aimed to determine the effect of the components of the bio coating material (rice husk extract and dammar resin) on the ability to protect mild steel from 1M NaOH corrosive media by calculating the corrosion rate and efficiency of the bio coating material. There are five stages in the research: the sample preparation stage, the stage of making latex solutions, the stage of making bio coating products, the stage of metal coating with bio coating materials, and the inhibition efficiency testing phase. The method used is the weight loss method to determine the rate of corrosion formed. This study obtained the highest inhibition efficiency (IE%) of 83.23% at a bio coating concentration of 1500 ppm, with a temperature of 40˚C, and an immersion time of 1 hour.
Potential and Opportunity of Co-Firing Power Plant in Indonesia Through Torrefaction of Empty Fruit Bunch (EFB) - A Review Irawan, Anton
World Chemical Engineering Journal VOLUME 5 NO. 1 JUNE 2021
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v5i1.12139

Abstract

Electricity was an important requirement for various activities. Currently, the level of electricity consumption in Indonesia was around 1000 kWh/capita/year and is expected to continue to increase towards developed countries with a minimum electricity consumption level of 3000 kWh/capita/year.  Along with the increasing demand for electricity, many new power plants were being built in Indonesia using coal as fuel. Coal was a non-renewable fuel so the CO2 gas produced has an impact on global warming. Co-Firing was a technology for combining fuel of biomass and coal in order to reduce the use of coal. The difference in the quality of biomass and coal was an obstacle to getting a stable combustion performance so it is necessary to improve the quality of biomass. The torrefaction technology can be implemented to improve the quality of biomass in Indonesia so it can be used as fuel for a co-firing power plant. One of the most potential biomass was empty fruit bunch (EFB) from palm oil processing with a potential of around 48 million tons per year or equivalent to 30 GW.  Every Oil palm mills plant that process 25 ton/hour of fresh oil palm fruit bunches can produce EFB around  5.25 ton/hour. With so many palm oil plants, torrefaction technology can be used to store EFB torrefied which can change the properties of biomass from hydrophilic to hydrophobic. The government's role to support the use of biomass, including EFB, is very much needed in increasing cooperation between palm oil mills and power plants.
The effect of Temperature Drying of Seaweed, Addition of Calcium Hypochlorite, and Potassium Hydroxide on the Quality of Semi-Refined Carrageenan Products Heriyanto, Heri; Astria, Windi; Fattah, Hanif Al; Suhendi, Endang
World Chemical Engineering Journal VOLUME 7 NO. 2 DECEMBER 2023
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/wcej.v7i2.23042

Abstract

Indonesia is a major producer of Eucheuma cottonii seaweed, yet its utilization remains suboptimal. Approximately 80% of seaweed exports consist of raw materials with low market value. The research aims to enhance the quality and market value of seaweed by transforming it into semi-refined carrageenan products. The method used for carrageenan production involves extraction using a KOH solution with different concentration levels using 5%, 7.5%, and 10% (w/v), along with drying temperatures ranging from 80°C to 90°C. Additionally, bleaching treatment is applied using calcium hypochlorite with concentration level using 1.5% and 2.5% (w/v). The analyses conducted include water content, ash content, yield, viscosity, gel strength, and degree of whiteness. The optimal results for semi-refined carrageenan, based on yield analysis, water and ash content, gel strength, viscosity, and degree of whiteness, were obtained from samples with a KOH concentration of 10%, calcium hypochlorite concentration of 1.5%, and drying temperature of 80°C.
In Silico Study and Bioactivity of Flavonoid Extract Syzygium polyanthum (Wight) Walp. Leaves Against Salmonella typhi Rochmat, Agus; Hidayati, Anisa; Mujijah, Mujijah; suhaedah, suhaedah
World Chemical Engineering Journal VOLUME 4 NO. 2 DECEMBER 2020
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v4i2.10593

Abstract

Salmonella typhi bacteria cause complications of bleeding in the intestine or intestinal perforation. However, Salmonella typhi bacteria will become resistant to chloramphenicol due to the formation of plasmids that produce the chloramphenicol acetyl transferase (CAT) enzyme which works to activate chloramphenicol. So, the search for active groups of natural compounds which are expected to have the work of deactivating the CAT enzyme. One of them is a flavonoid compound. The flavonoid group is widely used as an antimicrobial. This research was aimed at the extraction of bay leaf flavonoids. The presence of flavonoids was proven by phytochemical tests, namely a yellow color change with a slightly acidic amyl alcohol solvent - Mg metal and strengthened by the scanning results of the maximum wavelength on the band 1 407 nm and band 2 338 nm which is a special feature of flavonoid backbone. The results of GC-MS analysis obtained 4 flavonoid compounds from bay leaf extract which have an abundance above 1% and qualification above 90%: 2,3-Dihydro-3,5-dihydroxy-6-methyl-4H-pyran-4-one, alpha- tocopherol, beta-tocopherol, and pyragallol. The correlation between the results of the inhibitory test against Salmonella typhi at a concentration of 100 ppm with the results of docking tocopherol - 3CLA receptors which have an affinity bond energy / ∆Gbinding = 7.40 kcal / mol, indicates that the bay leaf flavonoid extract can inhibit the formation of chloramphenicol acetyl transferase (CAT).
Review: Biogas Production from Cow Dung and Its Potential in Indonesia Apriantika, Anellysha Putri; Anwari, Ropi; Janah, Citra Nurul; Syaichurrozi, Iqbal
World Chemical Engineering Journal VOLUME 6 NO. 2 DECEMBER 2022
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/wcej.v6i2.17994

Abstract

Cows are ruminant livestock used as a source of food and the economy. Besides that, cows also produce waste, namely cow dung. If cow dung piles up in the open and spreads, it will carry by rainwater to lower places, which can cause soil and air pollution. To reduce cow dung waste can be used as a substrate in an anaerobic digester to produce biogas. Important factors that can affect the biogas rate include pH, temperature, Total Solid (TS) and Volatile Solid (VS) content, and the C/N ratio. The yield of biogas can be optimal with pretreatment and co-digestion. The potential for cow dung can generate electricity of 5,580 kW per day from 18 million head of cattle.
EFFECT OF FECL3 AND AL2O3 ADDITION TOWARD LIGNIN CONTENT ON CORN COB DELIGNIFICATION WITH NAOH AS THE SOLVENT BY USING ULTRA SONIC ASSISTED Kanani, Nufus; Rusdi, Rusdi
World Chemical Engineering Journal VOLUME 3 NO. 1 JUNE 2019
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v3i1.4612

Abstract

Corn cobs are one of the many lignocellulosic wastes highly available all over Indonesia, one of them is in Banten. Lignocellulosic waste is agricultural waste containing cellulose, hemicellulose, and lignin. Corn cobs contain cellulose (40-60%), hemicellulose (20-30%) and lignin (15-30%). To be able to utilize the cellulose content contained in corn cobs optimally, it is necessary to separate the lignin content in corn cobs. This study aims to examine the effect of the addition of FeCl3 and AL2O3 on the delignification process of corn cob with NaOH solvent using ultrasonic waves. In the previous study, 40% lignin in cellulose was obtained by using NaOH solvents with the help of ultrasonic waves at a temperature of 60 0C and an ultrasonic frequency of 40 KHz. Therefore, in this study a delignification process was carried out at a temperature of 60 0C with an ultrasonic frequency of 40 kHz with the addition of FeCl3: NaOH, AL2O3: NaOH, AL2O3: FeCl3 and FeCl3: AL2O3 0: 1; 1: 1 and 2: 1 respectively. The test results using the Chesson method showed that the lowest lignin content in cellulose was 12% at the ratio of NaOH: AL2O3 as1: 2.
A review of encapsulation using emulsion crosslinking method Jayanudin, Jayanudin; Heriyanto, Heri
World Chemical Engineering Journal VOLUME 5 NO. 2 DECEMBER 2021
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v5i2.12312

Abstract

Encapsulation is a process to protect active components or other materials in the form of liquids, solids, and gases which are sensitive to the environment using coating materials. Encapsulation can be used for the pharmaceutical, food, beverage, textile, and other industries. The encapsulation method has been developed depending on the active ingredient being protected and its function. The encapsulation method is generally divided into chemical and mechanical methods. This review aims to explain the emulsion crosslinking which is one of the encapsulation methods. This method was easy and simple, just add a crosslink agent to the emulsion and then the microparticles formed were washed, filtered, and dried. This review also reports several encapsulation studies using the emulsion crosslinking method.
The Utilization of Zeolite from Laundry Waste Processing as a Soil-zeolite Growing Media for Corn Plant Maryani, Yeyen; Herayati, Herayati; Petrus, Dhannydon; Simatupang, Petrus Edison
World Chemical Engineering Journal VOLUME 8 NO.1 JUNE 2024
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/wcej.v8i1.25895

Abstract

Laundry waste containing detergent can release large amounts of Linear Alkylbenzene Sulfonate (LAS), as an active compound, and phosphates into the groundwater. One method for solving this problem is adsorption using natural zeolite. In this study, an innovation was made to utilize zeolite resulting from the processing of laundry wastewater as a growing media with soil for corn plants. The research methodology included activation of Bayah-Banten natural zeolite, adsorption process of LAS and phosphate from laundry waste by varying the contact time (0-60 minutes) and stirring speed (150-350 rpm), analysis of LAS and phosphate content, application of zeolite, obtained from waste treatment, as a soil-zeolite growing media for corn plants, and analysis of corn morphology (stem height, stem circumference and number of leaves).The results showed that the treatment of laundry waste using the adsorption method can reduce the concentration of LAS and phosphate in wastewater. The lowest LAS concentration was obtained at a stirring speed of 300 rpm and a contact time of 60 minutes, from 0.206312 mg/L (initial LAS) to 0.13747 mg/L (final LAS). The lowest phosphate concentration was obtained at a stirring speed of 350 rpm and contact time of 60 minutes, from 0.272184 mg/L (initial phosphate) to 0.06658 mg/L (final phosphate). The application of zeolite as a growing media with a ratio of soil and zeolite of 75:25 showed a good result in the morphology of corn plants, growth in stem height of 67.74% and stem circumference of 41.67%.

Page 5 of 9 | Total Record : 85

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