Dijan Supramono

Dijan Supramono
University of Indonesia | UI

Doctor of Engineering

About

44
Publications
24,852
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180
Citations
Introduction
Supramono currently works at the Department of Chemical Engineering, Universitas Indonesia. His current project is 'co-pyrolysis of biomass-plastics'.
Additional affiliations
November 1988 - May 2016
University of Indonesia
Position
  • Lecturer

Publications

Publications (44)
Conference Paper
The non-oxygenated fraction of bio-oil obtained from co-pyrolysis of biomass-polypropylene plastic contains alkenes which may cause high ignition delay time and instability when compared to commercial diesel fuel. A hydrogenation reaction is needed to upgrade the characteristics of bio-oil to be close to those of commercial diesel fuel. The present...
Article
The Multi-Supply & Seller mechanism with Multi-Buyers in Badak LNG Plant there will be several obstacles tomeet with requirementof each sales contract, the fluctuate requirement of each buyers, changes in shipping schedules caused by problems at the plant and ship, and flexibility to move LNG cargo are expected to cause problems in planning and sch...
Conference Paper
Indonesia is one of the largest palm oil producers in the world. Acrolein and propylene glycol can be produced from glycerol as a byproduct of palm oil-based biodiesel whereas they are still imported by Indonesia. The purpose of this study is to determine the economic potential of combined acrolein and propylene glycol production from crude glycero...
Article
The non-oxygenated fraction of bio-oil is precursor of the formation of biofuel because it contains hydrocarbon only. Zeolite catalysts have been proved to improve the yields of non-polar fraction of bio-oil in case of fast co-pyrolysis. In the present work, the catalysts were applied to slow co-pyrolysis to investigate their effect on the yields a...
Article
Full-text available
Thermal co-pyrolysis of corn cobs and polypropylene (PP) at low heating rate (thermal slow co-pyrolysis) has succeeded in separating bio-oil produced between oxygenated and non-oxygenated phases spontaneously. In co-pyrolysis, PP can sequester oxygen from bio-oil to convert part of bio-oil to non-oxygenated phase and can contribute partly non-oxyge...
Article
Full-text available
Vacuum residue (VR) is potential to be used as a feedstock for mesophase pitch (MP) production because of its low cost and aromatic content. MP, which is a liquid-crystalline state of VR, may be used as precursor of activated carbon (AC). Gum rosin containing conjugated double bonds may be added to and can improve crystallinity and pore surface are...
Article
Full-text available
Crude oil refineries in Indonesia produce waste in the vacuum distillation as vacuum residue and utilization is still low. Vacuum residue contains high aromatics which can be utilized as raw material to produce activated carbon. Such a activated carbon is widely used as electric double-layer capacitors. Vacuum residue was mixed with dehydrated cast...
Article
Full-text available
Biomass pyrolysis and polypropylene (PP) pyrolysis in a stirred tank reactor exhibited different heat transfer phenomena whereby heat transfer in biomass pyrolysis was driven predominantly by heat radiation and PP pyrolysis by heat convection. Therefore, co-pyrolysis could exhibit be expected to display various heat transfer phenomena depending on...
Conference Paper
The pyrolysis of biomass and plastic waste to biofuel is recognized as an effective solution to the energy crisis and waste issue both of which are perceived as the two most urgently solved problems now by Indonesia. Co-pyrolysis of equal weights of corncob and polypropylene plastic at low heating rate has been able to produce a non-polar bio-oil w...
Conference Paper
Co-pyrolysis of corncobs and polypropylene plastic with equal feeds at low heating rate has succeeded in producing non-oxygenated fraction of bio-oil by spontaneous separation from its oxygenated fraction with the former fraction being higher than the latter. This fraction has higher heating value of 47 MJ/kg and kinematic viscosity of 2.1 cStokes...
Article
Full-text available
NOx, a generic term for nitrogen oxides, is an air pollutant that can causes damage to the ozone layer, and produces greenhouse effects, acid rain and photochemical smog. It is mainly produced by diesel engine exhaust due to the reaction between nitrogen and oxygen, especially at elevated temperatures. NOx needs to be reduced from flue gas in order...
Conference Paper
Full-text available
Waste from vacuum distillation of crude oil refineries in Indonesia is still not fully utilized. Vacuum residue is potential to be used as a feedstock to produce mesophase pitch by removing its asphaltene content (deasphalting) followed by thermal polymerization of the remaining aromatic compounds performed at low heating rate. Mesophase pitch is r...
Conference Paper
Full-text available
Corncob is one of the biomass wastes which has abundant amount in Indonesia. Through pyrolysis, corncobs can be converted into bio-oil containing compounds such as furans and phenolics, which can be utilized as extractants of aromatics in raw lubricant oil. In high temperature, the aromatic content in engine lubricants can affect physical propertie...
Conference Paper
Full-text available
Petroleum refinery produces vacuum residue in a vacuum distillation unit as waste. Mixture of the vacuum residue and a conjugated double bond compound can be used as feedstock to produce activated carbon because the compound forms a stable mesophase at high temperature to allow polymerization of aromatic compounds in vacuum residue. Castor oil, whi...
Article
Full-text available
This study aimed to produce and improve the quality of pyrolysis oil as a source of bioenergy that is made by mixing palm empty fruit bunch (EFB) with high-density polyethylene (HDPE) plastic waste. The slow co-pyrolysis method was employed, and HDPE waste and EFB were fed into the pyrolysis reactor at HDPE amounts of 0, 10, 25, 50, 75, and 100% by...
Article
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Efforts to improve the performance of CO2 absorption using bubbling columns and liquid jet flow have consistently been developed. The advantage of the present column is the presence of gas entrainment by suction of nozzle and the gas dispersed throughout the bulk of liquid by the formation of bubble clouds. The selection of liquid jet flow configur...
Article
Full-text available
Polypropylene plastic (PP), which has higher hydrogen content compared to that in biomass, is potential to be used as a cheap hydrogen source for pyrolysis of biomass, such as corncobs, to remove part of oxygen content in the biomass pyrolysis oil. By charging these two materials, synergistic effects will appear that improve quality and quantity of...
Article
Full-text available
Co-pyrolysis between corncobs and polypropylene has a synergetic effect that transforms part of polar fraction of bio-oil into non-polar fraction containing non-oxygenate compounds as precursor for synthesis of bio-fuel. In the present work, pyrolysis of the nonpolar fraction of bio-oil was led to produce bio-oil with viscosity similar to that of g...
Article
Full-text available
Bio-diesel was synthesized by hydrogenating the non-polar fraction of the bio-oil produced from the co-pyrolysis between corncobs and polypropylene. Co-pyrolysis of corn cobs and polypropylene was conducted in a stirred tank reactor at heating rate of 5°C/min and maximum temperature of 500°C to attain synergetic effect in non-polar fraction yield w...
Article
Full-text available
In co-pyrolysis of biomass-plastics, bio-oil produced contains both oxygenated and non-oxygenated compounds. High oxygen composition is responsible for instability and low heating value of bio-oil and high acid content for corrosiveness. Aims of the present work are to evaluate possibilities of achieving phase separation between oxygenated and non-...
Article
Full-text available
Bio-oil produced by biomass pyrolysis contains high oxygenates, namely, carboxylic acids, alcohols, and ketones resulting in low calorific fuel, and therefore bio-oil requires upgrading to sequester these oxygenates. By conducting the co-pyrolysis of biomass and plastic feed blend, the donation of hydrogen by plastic free radicals to the oxygen of...
Article
Full-text available
Over the past few decades, interest in developing biomass-derived fuel has been increasing rapidly due to the decrease in fossil fuel reserves. Bio-oil produced by biomass pyrolysis however contains high oxygen compounds resulting in low calorific-value fuel and therefore requiring upgrading. In co-pyrolysis of the feed blend of plastics of High De...
Article
Full-text available
Pyrolysis, a thermal cracking process in inert environment, may be used to produce bio-oil from biomass and plastic waste thus accommodating the use of renewable energy. Abundant amount of biomass wastes in Indonesia are not utilised and plastic wastes are not well processed for clean environment. The aim of present work was to evaluate effect of m...
Article
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The application of bio-oil for biofuel has been limited due to its low heating value, high acidity and high oxygenate content. Pursuant to the urgency of obtaining access to sustainable energy from renewable resources, the studies for bio-oil upgrading have been recently placed in high priority. This study is aimed at identifying the effect of biom...
Article
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Torrefaction, which is used to improve the properties of sugarcane bagasse as fuel in pulverised fuel combustion and as carbon feed in gasification, is a low heating rate pyrolysis of biomass carried out at a temperature of 200–300 o C, at an atmospheric pressure, and in an inert environment. In the present work, sugarcane bagasse was torrefied at...
Conference Paper
Full-text available
Sugarcane bagasse waste in Indonesia reaching 8.5 million tons per year is potential to be developed as a substituent for petroleum-based fuels. This present work involved the pyrolysis of sugarcane bagasse in a microwave to produce bio-oil, which may be developed further to produce biofuel. The pyrolysis condition was varied by using power inputs...
Article
Full-text available
To fulfill the requirement for synthetic fuel (synfuel) production in the Fischer-Tropsch process, in which syngas fed to the process has a H2/CO mole ratio approaching 2, gasification of lignite coal is needed. In this research, char particles were prepared by pyrolysis of lignite coal at controlled heating rates to obtain the highest possible sur...
Article
Full-text available
Gasification uses steam increases H2 content in the syngas. Kinetics of gasification process can be improved by using K2CO3 catalyst. Controlled heating rate in pyrolysis step determines the pore size of charcoal that affects yield gas and H2 and CO content in the syngas. In previous research, pyrolisis step was performed without considering heatin...
Conference Paper
Full-text available
Conventional biomass stoves, which currently use direct combustion of biomass pellets or briquettes, have still a problem of emitting much higher CO gas emission compared to LPG stoves at the level of 100's ppm,. These values are well above the minimum allowable CO gas emission of 25 ppm and therefore the emission is not safe for the stove users. I...
Conference Paper
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Kompor biomassa konvensional yang ada saat ini, yang menggunakan pembakaran langsung, masih memiliki permasalahan dengan emisi gas CO yang lebih tinggi dibandingkan kompor LPG. Pada penelitian ini, dirancang suatu kompor gas-biomassa menggunakan prinsip top-lit updraft gasifier yang memanfaatkan pembakaran gas hasil pirolisa pellet biomassa di bagi...
Conference Paper
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A B S T R A K Salah satu sumber energi baru yang berpotensi diterapkan di Indonesia adalah biomassa. Dengan ketersediaan yang melimpah, limbah kelapa sawit sangat potensial untuk dikonversikan menjadi bio-oil. Tujuan riset ini adalah untuk mendapatkan teknologi produksi bio-oil yang memiliki karakteristik mendekati solar/petroleum-diesel dari limba...
Conference Paper
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Biomass energy is an alternative energy that could become one of the solutions to substitute fossil fuels and to overcome energy deficit in Indonesia because of its renewable nature and producing no net CO 2 emission. Potential of biomass in Indonesia for direct combustion is about 1,238.71 million GJ/year or equivalent to two third of the current...
Conference Paper
Full-text available
Conventionally, the production of syngas uses partial oxidation reaction involving methane and pure oxygen prepared from purification of air which makes this reaction quite expensive. In this research, syngas production is done by involving the partial oxidation of methane through chemical looping reforming (CLR) process using metal oxide CaO as th...
Conference Paper
Full-text available
In the time when the government encourages the conversion of kerosene to gas for household stoves, concurrently the utilisation of coal briquette is steadily increasing. At present, coal briquettes are used mostly in low-income households as well as in low and medium-scale industries especially in poultry industry. Their consumption reaches 2 milli...
Conference Paper
Full-text available
Biomass is an alternative energy that could become one of the solutions to substitute fosil fuels and to overcome energy deficit in Indonesia. The reasons are the first biomass is a renewable energy source which emit nearly zero CO 2 to the atmosphere and the second Indonesia has abundant biomass waste resources that have not been utilized yet. The...
Conference Paper
Full-text available
Biomass materials which can be used as a fuel are wood, char, dung and agricultural waste. For Indonesian domestic needs, biomass is usually utilised as a cooking stove fuel by burning the wood directly. However, such burning incurs low thermal efficiency and high emissions of carbon monoxide, hydrocarbon, and particulate matters. This research was...
Conference Paper
Full-text available
Biomass is a potential alternative energy replacing oil and gas. The experiment goals are preparing and testing pellets in order to create fuels with good combustion performance and low emission. Pellets were shaped cylindrical. The variations are pellets raw materials (rice husk, straw, rubber wood, camphor wood), pellets size (10 – 20 mm in diame...
Article
A Study of CO2 Absorption Using Jet Bubble Column. The phenomenon of plunging jet gas-liquid contact occurs quite often in nature, it's momentum carries small air bubbles with it into the reactor medium. The momentum of the liquid stream can be sufficient to carry small bubbles completely to the bottom of the vessel. A stream of liquid falling...

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