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Robert Manurung

Bio: Robert Manurung is an academic researcher from Bandung Institute of Technology. The author has contributed to research in topics: Biodiesel & Hermetia illucens. The author has an hindex of 14, co-authored 47 publications receiving 947 citations. Previous affiliations of Robert Manurung include University of Groningen & Tanjungpura University.

Papers
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Journal ArticleDOI
TL;DR: The LA yield as a function of the process conditions was modelled using a kinetic model originally developed for the acid-catalysed hydrolysis of cellulose and good agreement between the experimental and modelled data was obtained.

237 citations

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TL;DR: In this paper, the authors report on the upgrading of flash pyrolysis oil using an improved alcohol treatment method, which consists of treating pyrolynsis oil with a high boiling alcohol like n-butanol in the presence of a (solid) acid catalyst at 323-353 K under reduced pressure.

129 citations

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TL;DR: In this article, fast pyrolysis experiments were carried out to convert the nut shells of the Jatropha curcas L. (JCL) shrub, a plant producing a high quality plant oil that may be converted to biodiesel in good yields.

80 citations

Journal Article
TL;DR: This study showed the possibility of production of insect larvae biomass as through bioconversion process of agricultural waste rich with lignocellulose and lowest waste reduction efficiency was recorded by larvae feed rate.
Abstract: This study focuses on the application of black soldier fly larvae (Hermetia illucens L) as a bioconversion agent of the rice straw to reduce amount of waste while in the same time produced larvae biomass In this study, larvae were fed with rice straw at six different feed rates (125, 25, 50, 100, and 200 mg/larvae/day) until larvae reached prepupal stage During study, relative growth, relative consumption rate, and waste reduction level were measured Daily feeding of 200 mg of grinded rice straw per larvae resulted in the highest prepupal dry weight (1559 ± 001 mg), lowest developmental time (39 ± 01 days), but lowest waste reduction efficiency (1085 ± 00005%) Highest waste reduction efficiency was recorded by larvae feed rate of 125 mg/larvae/day (3153 ± 001%) and decreased with higher feeding rate This study showed the possibility of production of insect larvae biomass as through bioconversion process of agricultural waste rich with lignocellulose

75 citations

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TL;DR: In this article, the synthesis of long-chain fatty esters of corn starch (starch laurate and starch stearate) with a broad range in degree of substitution (DS = 0.24-2.96) was described.
Abstract: This paper describes the synthesis of long-chain fatty esters of corn starch (starch laurate and starch stearate) with a broad range in degree of substitution (DS = 0.24-2.96). The fatty esters were prepared by reacting the starch with vinyl laurate or vinyl stearate in the presence of basic catalysts (Na(2)HPO(4), K(2)CO(3), and Na acetate) in DMSO at 110 degrees C. The yellowish products were characterized by (1)H-, (13)C-NMR and FTIR. The DS of the products is a function of the carbon number of the fatty acid chain, vinyl ester to starch ratio and the type of catalyst. When performing the reactions using Na(2)HPO(4) as the catalyst, the DS for the starch laurate compounds is higher than for the corresponding starch stearates. For low vinyl ester to starch ratios, an increase in the vinyl ester concentration leads to higher product DS values. At higher ratios, the DS decreases, presumably due to a reduction of the polarity of the reaction medium. K(2)CO(3) and Na acetate are superior catalysts with respect to activity compared to Na(2)HPO(4) and products with DS values close to 3 were obtained.

70 citations


Cited by
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Journal ArticleDOI
TL;DR: In this paper, an updated review on fast pyrolysis of biomass for production of a liquid usually referred to as bio-oil is provided, including the major reaction systems.
Abstract: This paper provides an updated review on fast pyrolysis of biomass for production of a liquid usually referred to as bio-oil. The technology of fast pyrolysis is described including the major reaction systems. The primary liquid product is characterised by reference to the many properties that impact on its use. These properties have caused increasingly extensive research to be undertaken to address properties that need modification and this area is reviewed in terms of physical, catalytic and chemical upgrading. Of particular note is the increasing diversity of methods and catalysts and particularly the complexity and sophistication of multi-functional catalyst systems. It is also important to see more companies involved in this technology area and increased take-up of evolving upgrading processes. © 2011 Elsevier Ltd.

3,727 citations

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TL;DR: An updated evaluation of potential target structures using similar selection methodology, and an overview of the technology developments that led to the inclusion of a given compound are presented.

3,536 citations

Journal ArticleDOI
TL;DR: Renewable Resources Robert-Jan van Putten,†,‡ Jan C. van der Waal,† Ed de Jong,*,† Carolus B. Rasrendra,*,⊥ Hero J. Heeres,*,‡ and Johannes G. de Vries.
Abstract: Renewable Resources Robert-Jan van Putten,†,‡ Jan C. van der Waal,† Ed de Jong,*,† Carolus B. Rasrendra,‡,⊥ Hero J. Heeres,*,‡ and Johannes G. de Vries* †Avantium Chemicals, Zekeringstraat 29, 1014 BV Amsterdam, the Netherlands ‡Department of Chemical Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, the Netherlands Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, the Netherlands DSM Innovative Synthesis BV, P.O. Box 18, 6160 MD Geleen, the Netherlands Department of Chemical Engineering, Institut Teknologi Bandung, Ganesha 10, Bandung 40132, Indonesia

2,267 citations

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TL;DR: A critical review of the literature on furfural, a promising, rich platform for lignocellulosic biofuels, presents new results and analysis in this area and highlights challenges and areas that need improvement.
Abstract: Furfural offers a promising, rich platform for lignocellulosic biofuels. These include methylfuran and methyltetrahydrofuran, valerate esters, ethylfurfuryl and ethyltetrahydrofurfuryl ethers as well as various C(10)-C(15) coupling products. The various production routes are critically reviewed, and the needs for improvements are identified. Their relative industrial potential is analysed by defining an investment index and CO(2) emissions as well as determining the fuel properties for the resulting products. Finally, the most promising candidate, 2-methylfuran, was subjected to a road trial of 90,000 km in a gasoline blend. Importantly, the potential of the furfural platform relies heavily on the cost-competitive production of furfural from lignocellulosic feedstock. Conventional standalone and emerging coproduct processes-for example, as a coproduct of cellulosic ethanol, levulinic acid or hydroxymethyl furfural-are expensive and energetically demanding. Challenges and areas that need improvement are highlighted. In addition to providing a critical review of the literature, this paper also presents new results and analysis in this area.

1,113 citations

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TL;DR: In this article, the authors reviewed the research efforts to improve the bio-oil production from biomass and pointed out barriers to achieving improvements in the future, including biooil basics (e.g., characteristics, chemistry), application, environmental and economic assessment.
Abstract: Biomass can be utilized to produce bio-oil, a promising alternative energy source for the limited crude oil. There are mainly two processes involved in the conversion of biomass to bio-oil: flash pyrolysis and hydrothermal liquefaction. The cost of bio-oil production from biomass is relatively high based on current technologies, and the main challenges are the low yield and poor bio-oil quality. Considerable research efforts have been made to improve the bio-oil production from biomass. Scientific and technical developments towards improving bio-oil yield and quality to date are reviewed, with an emphasis on bio-oil upgrading research. Furthermore, the article covers some major issues that associated with bio-oil from biomass, which includes bio-oil basics (e.g., characteristics, chemistry), application, environmental and economic assessment. It also points out barriers to achieving improvements in the future.

866 citations