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  • Institute of Physics (IOP)  (3)
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  • 1
    Publication Date: 2018-11-30
    Description: Indonesia is rich with pummelo ( Citrus maxima (Burn.) Merr.) germplasm, but its development is still very limited. Pummelo development efforts are directed to the availability of superior cultivars. The objective of this research was to gain information the developmental and quality differences of fruit of three pummelo accessions. This research was conducted at Cikabayan Research Station, IPB from December 2015 to October 2016. The research used a randomized complete block design with single factor named accession (Accession 1, Accession 2 and Accession 3) consisting of five replication. The results showed that fruit growth of all accessions continued to increase in early development phase, but fruit grew slowly in the maturity period. Accession 1 showed a higher in fruit volume and weight than the other accessions. The content of fruit juice of accession 1 was significantly higher than the Accession 3 but having no difference with Accession 2. Among accessions did not s...
    Print ISSN: 1755-1307
    Electronic ISSN: 1755-1315
    Topics: Geography , Geosciences , Physics
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  • 2
    Publication Date: 2017-08-10
    Description: Clinoptilolite zeolites were chemically modified with chitosan (Chit) and magnetic iron oxide nanoparticles (Fe 3 O 4 NPs) were synthesized for removal of mercury from liquid condensate hydrocarbon. The mercury content was in liquid hydrocarbon which was measured by Lumex mercury analyzer. The performance of sorbents based on zeolites modified chitosan and magnetic nanoparticles were examined on the real liquid condensate hydrocarbon. Removal of mercury using a prestine clinoptilolite zeolites, and zeolites modified chitosan (zeolites-Chit) were ∼4.5, and ∼35%, respectively. The effects of magnetic nanoparticles in zeolites-Chit sorbents were significant to reduce the mercury content in liquid condensate hydrocarbon which were from ∼63 to ∼66%. Increasing the mass ratio of Fe 3 O 4 that influenced to the BET surface area of natural zeolites. Zeolites-Chit-Fe 3 O 4 NPs as an efficient sorbents are potential ideal to remove me...
    Print ISSN: 1755-1307
    Electronic ISSN: 1755-1315
    Topics: Geography , Geosciences , Physics
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  • 3
    Publication Date: 2018-01-25
    Description: Green diesel is a second generation of biofuel that has a potential to answer the energy needs in Indonesia, also in the world. The reactions used to produce green diesel are hydrolysis and hydrodeoxygenation by using NiMo/Al 2 O 3 catalyst. Hydrolysis will change the triglycerides in the raw material, which is waste cooking oil into free fatty acids (FFA) and then converted into green diesel through hydrodeoxygenation. Hydrolysis of waste cooking oil carried out at temperature of 200°C and pressure of 16 bar for 3 hours with water and oil volume ratio of 1:1. FFA product of hydrolysis is as much as 73.89%. For hydrodeoxygenation, variation in operating condition used are 375°C with pressure of 12 bar and 400°C with pressure of 15 bar. Characterizations of green diesel have shown that both of hydrodeoxygenation products have met the specifications of diesel, except the acid number with optimum operating condition at 400°C and pressure of 15 bar. These conditio...
    Print ISSN: 1755-1307
    Electronic ISSN: 1755-1315
    Topics: Geography , Geosciences , Physics
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