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Featured researches published by Dieni Mansur.


Biofuels | 2018

Utilization of DDGS using ethanol solution for biocrude oil production by hydrothermal liquefaction

Dieni Mansur; Teruoki Tago; Takao Masuda

ABSTRACT Production of bioethanol from biomass has been known in almost worldwide. Grain-based bioethanol production generally yields a by-product known as DDGS (dried distiller grains with soluble). DDGS is potentially convertible into biocrude oil due to the lipid, carbohydrate, and protein content. One of the technologies for the production of biocrude oil from solid biomass is hydrothermal liquefaction. In this study, hydrothermal liquefaction of DDGS was conducted using ethanol solution as a reaction medium. The process was carried out under various temperatures, ratios of DDGS to reaction medium, and ethanol concentrations (15–99.5%). A high yield of biocrude oil was recovered at 280°C and ratio between DDGS and 75% of ethanol solution as 1:20. It was found that around 38.2% of biocrude oil was recovered from DDGS. Thus, DDGS has the potential to be converted into biocrude oil.


INTERNATIONAL SYMPOSIUM ON APPLIED CHEMISTRY (ISAC) 2016 | 2017

Lipid extraction of wet BLT0404 microalgae for biofuel application

Dieni Mansur; Muhammad Arifuddin Fitriady; Dwi Susilaningsih; Sabar Pangihutan Simanungkalit; Egi Agustian

Recently, research and development of microalgae for biodiesel production were conducted by researchers in the world. This research becomes popular because of an exponential growth of the microalgae under nutrient limitation. Lipid of microalgae grows faster than oil producing land crops. Therefore, microalgae lipid content could improve the economics of biodiesel production. The aim of this study was to investigate yield of lipid extract and chemicals compounds containing in non-acylglycerol neutral lipid from BLT 0404 microalga. The study was conducted because lipid extraction was an important step for biodiesel as well as biofuel production. The extraction was carried out using polar and non-polar mixture solvents. The polar solvent was methanol and non-polar one was chloroform. Process extraction was conducted under various stirring time between the microalgae and methanol and volume ratio between the methanol and chloroform. Methanol as a polar solvent was able to extract polar lipid (phospholipid and glycolipid) because it removed polar membrane lipid and lipid-associated to polar molecule. Moreover, the non-polar solvent was used for extraction non-acylglycerol neutral lipid (hydrocarbons, sterols, ketones, free fatty acids, carotenes, and chlorophylls) for biofuel production. Under ratio of microalgae: methanol: chloroform of 0.8: 4: 2 that stirring time of the microalgae with methanol was 30 min yielded 58% of total lipid extract. The yield value consisted of 14.5% of non-acylglycerol neutral lipid and 43.5% of polar lipid. The non-acylglycerol neutral lipid will be converted into biofuel. Therefore, analysis of its chemical compounds was required. The non-acylglycerol neutral lipid was analyzed by GCMS and found that the extract contained long chains of hydrocarbon compounds. The hydrocarbons consisted of C18–C30 that high peaks with larger percentage area were C20–C26. The results suggested that stirring between microalgae and methanol for 30 min was needed before additional of chloroform. Moreover, the ratio of methanol must be higher than chloroform due to the higher portion of polar lipid content in the microalgae.Recently, research and development of microalgae for biodiesel production were conducted by researchers in the world. This research becomes popular because of an exponential growth of the microalgae under nutrient limitation. Lipid of microalgae grows faster than oil producing land crops. Therefore, microalgae lipid content could improve the economics of biodiesel production. The aim of this study was to investigate yield of lipid extract and chemicals compounds containing in non-acylglycerol neutral lipid from BLT 0404 microalga. The study was conducted because lipid extraction was an important step for biodiesel as well as biofuel production. The extraction was carried out using polar and non-polar mixture solvents. The polar solvent was methanol and non-polar one was chloroform. Process extraction was conducted under various stirring time between the microalgae and methanol and volume ratio between the methanol and chloroform. Methanol as a polar solvent was able to extract polar lipid (phospholipid an...


INTERNATIONAL SYMPOSIUM ON APPLIED CHEMISTRY (ISAC) 2016 | 2017

Hydrothermal pretreatment of palm oil empty fruit bunch

Sabar Pangihutan Simanungkalit; Dieni Mansur; Boby Nurhakim; Astrid Agustin; Nino Rinaldi; Muryanto; Muhammad Ariffudin Fitriady

Hydrothermal pretreatment methods in 2nd generation bioethanol production more profitable to be developed, since the conventional pretreatment, by using acids or alkalis, is associated with the serious economic and environmental constraints. The current studies investigate hydrothermal pretreatment of palm oil empty fruit bunch (EFB) in a batch tube reactor system with temperature and time range from 160 to 240 C and 15 to 30 min, respectively. The EFB were grinded and separated into 3 different particles sizes i.e. 10 mesh, 18 mesh and 40 mesh, prior to hydrothermal pretreatment. Solid yield and pH of the treated EFB slurries changed over treatment severities. The chemical composition of EFB was greatly affected by the hydrothermal pretreatment especially hemicellulose which decreased at higher severity factor as determined by HPLC. Both partial removal of hemicellulose and migration of lignin during hydrothermal pretreatment caused negatively affect for enzymatic hydrolysis. This studies provided import...


PROCEEDINGS OF THE 3RD INTERNATIONAL SYMPOSIUM ON APPLIED CHEMISTRY 2017 | 2017

Production of biodiesel from Coelastrella sp. microalgae

Dieni Mansur; Muhammad Arifuddin Fitriady; Dwi Susilaningsih; Sabar Pangihutan Simanungkalit

Microalgae have a wide area of usage and one of them it can be used for biodiesel production. In biodiesel production, lipids containing triglyceride or free fatty acid are converted into methyl ester through trans/esterification reactions. Lipids from microalgae can be extracted by acetone and dimethyl carbonate using homogenizer. Esterification of the lipids was investigated using various catalysts and source of methyl group. Activity of homogeneous catalyst such as HCl and H2SO4 and heterogeneous catalysts such as montmorillonit K-10 and ledgestone was investigated. Moreover, methanol and dimethyl carbonate as source of methyl group were also studied. Among of catalysts with methanol as source of methyl group, it was found that yield of crude biodiesel derived from Choelestrella Sp. microalgae was high over H2SO4 catalyst. On the other hand, over H2SO4 catalyst using dimethyl carbonate as source of methyl group, yield of crude biodiesel significant increase. However, FAME composition of crude biodiesel was high over HCl catalyst.Microalgae have a wide area of usage and one of them it can be used for biodiesel production. In biodiesel production, lipids containing triglyceride or free fatty acid are converted into methyl ester through trans/esterification reactions. Lipids from microalgae can be extracted by acetone and dimethyl carbonate using homogenizer. Esterification of the lipids was investigated using various catalysts and source of methyl group. Activity of homogeneous catalyst such as HCl and H2SO4 and heterogeneous catalysts such as montmorillonit K-10 and ledgestone was investigated. Moreover, methanol and dimethyl carbonate as source of methyl group were also studied. Among of catalysts with methanol as source of methyl group, it was found that yield of crude biodiesel derived from Choelestrella Sp. microalgae was high over H2SO4 catalyst. On the other hand, over H2SO4 catalyst using dimethyl carbonate as source of methyl group, yield of crude biodiesel significant increase. However, FAME composition of crude biodiesel...


Fuel | 2013

Production of ketones from pyroligneous acid of woody biomass pyrolysis over an iron-oxide catalyst☆

Dieni Mansur; Takuya Yoshikawa; Koyo Norinaga; Jun-ichiro Hayashi; Teruoki Tago; Takao Masuda


Biomass & Bioenergy | 2014

Conversion of cacao pod husks by pyrolysis and catalytic reaction to produce useful chemicals

Dieni Mansur; Teruoki Tago; Takao Masuda; Haznan Abimanyu


Fuel Processing Technology | 2013

Conversion of ethanol fermentation stillage into aliphatic ketones by two-step process of hydrothermal treatment and catalytic reaction

Dieni Mansur; Mana Shimokawa; Kiyoshi Oba; Yuta Nakasaka; Teruoki Tago; Takao Masuda


Indonesian Journal of Chemistry | 2015

Copper and Cadmium Toxicity to Marine Phytoplankton, Chaetoceros gracilis and Isochrysis sp.

Suratno Suratno; Rachma Puspitasari; Triyoni Purbonegoro; Dieni Mansur


j. widyariset | 2016

UTILIZATION OF NATURAL IRON ORE FOR CATALYTIC REACTION OF (Pyroligneous acid) DERIVED FROM PALM KERNEL SHELLS

Muhammad Arifuddin Fitriady; Dieni Mansur; Sabar Pangihutan Simanungkalit


Reaktor | 2018

Identification of Compounds Released During Pyrolysis of Palm Kernel Shell (PKS) Using Pyrolysis-GC/MS

Dieni Mansur; Sabar Pangihutan Simanungkalit

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Nino Rinaldi

Indonesian Institute of Sciences

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Haznan Abimanyu

Indonesian Institute of Sciences

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Agus Haryono

Indonesian Institute of Sciences

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Egi Agustian

Indonesian Institute of Sciences

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