Browsing Peer Review by Author "Subagyono, RR Dirgarini"

Now showing items 1-20 of 22

    • Adsorption of toluene and xylene from aqueous solution on SBA-15 from rice husk 

      Prestianggi, Y; Maylisa, N; Subagyono, RR Dirgarini; Sitorus, Saibun; Daniel (IOP Publishing Ltd., 2019-08-16)
      Synthesis of Santa Barbara Amorphous-15 (SBA-15) from rice husk ash (Oryza Sativa L.) as toluene and xylene adsorbents has been performed. SBA-15 was synthesised by the modified surfactant template method. SBA-15 from rice ...

    • Amine modified mesocellular siliceous foam (MCF) as a sorbent for CO2 

      Subagyono, RR Dirgarini; Liang, Zhijian; Knowles, Gregory P.; Chaffee, Alan L. (Elsevier, 2011-02-11)
      Adsorption is considered a promising method for carbon capture. CO2 adsorbents take a variety of forms – but one approach is to fill mesoporous substrates with a polymeric CO2 selective sorbent. SBA-15 and mesocellular ...

    • Carbon monolith from Victorian brown coal for hydrogen storage 

      Alfadlil, B R; Knowles, Gregory P.; Parsa, M R; Subagyono, RR Dirgarini; Daniel; Chaffee, Alan L. (IOP Publishing Ltd., 2019-08-16)
      The application of carbon monolith from VBC (Victorian Brown Coal) for H2 storage has been studied. The storage capacities of the monolith were measured using an isothermal adsorption process at different temperatures and ...

    • Characterisation of the products of low temperature pyrolysis of Victorian brown coal in a semi-continuous/flow through system 

      Subagyono, RR Dirgarini; Fei, Yi; Marshall, Marc; Jackson, W. Roy; Patti, Antonio F.; Chaffee, Alan L. (Elsevier BV, 2018-07-24)
      Two Victorian brown coal samples, a run-of-mine Loy Yang coal (LY) and a Loy Yang light lithotype (LL), were subjected to pyrolysis at 420–460 °C and 330–460 °C, respectively, under a continuous nitrogen flow. The process ...

    • Characterization of Slow Pyrolysis Products of Macaranga motleyana: Effect of Sample Size 

      Subagyono, RR Dirgarini; Puspitasari, Rika; Sanjaya, Ari Susandy; Suwinarti, Wiwin (IOP Publishing Ltd., 2020-06-30)
      The characterization of biocrude oil produced by slow pyrolysis of fast growing wood Macaranga motleyana has been conducted. Slow pyrolysis was carried out in a fixed bed pyrolysis reactor at 500 oC for 1 hour with a variety ...

    • CO2 adsorption by amine modified siliceous mesostructured cellular foam (MCF) in humidified gas 

      Subagyono, RR Dirgarini; Marshall, Marc; Knowles, Gregory P.; Chaffee, Alan L. (Elsevier, 2013-11-27)
      A set of branched and linear polyethyleneimine (PEI) modified mesocellular siliceous foams (MCF) were evaluated as adsorbents for CO2 capture at modestly elevated temperatures under conditions that simulate the vacuum swing ...

    • CO2 adsorption on SBA-15: A molecular modelling 

      Subagyono, RR Dirgarini; Chaffee, Alan L. (IOP Publishing Ltd., 2018-05-08)
      A study on molecular modelling of CO2 adsorption on SBA-15 has been conducted. A model of SBA-15 with 5.6 nm pore diameter and 3.9 OH/nm2 was constructed and used for the molecular studies of CO2 adsorption. Adsorption of ...

    • Electron transfer study between hydrogen molecules and graphene surface 

      Nasri; Subagyono, RR Dirgarini; Gunawan, Rahmat (IOP Publishing Ltd., 2020-06-30)
      Electron transfer studies on the interaction of graphene surface and hydrogen (H2) molecules have been carried out. The calculations were based on the Density Functional Theory (DFT) with a basis set of Generalized-Gradi ...

    • Improvement in liquid fuel product quality from reactions of grape marc with CO/H2O 

      Subagyono, RR Dirgarini; Marshall, Marc; Jackson, W. Roy; Chaffee, Alan L. (Elsevier BV, 2015-06-19)
      Reactions of grape marc with CO/H2O have been investigated over a range of temperatures (320–425 C) with and without added sodium carbonate (Na2CO3) or sodium aluminate (NaAlO2) with a view to optimising liquid fuel quality. ...

    • Kinetic Study of Copyrolysis of the Green Microalgae Botryococcus braunii and Victorian Brown Coal by Thermogravimetric Analysis 

      Subagyono, RR Dirgarini; Masdalifa, Wardina; Aminah, Siti; Nugroho, Rudy Agung; Mollah, Mamun; Allo, Veliyana Londong; Gunawan, Rahmat (American Chemical Society, 2021-11-18)
      The copyrolysis of the green microalgae Botryococcus braunii and Victorian brown coal was studied by thermogravimetric analysis using the Kissinger−Akahira−Sunose (KAS), Flynn−Wall−Ozawa (FWO), and Friedman methods. This ...

    • Pembuatan Silika Mesopori Sba-15 Dari Abu Daun Bambu Petung (Dendrocalamus Asper) 

      Subagyono, RR Dirgarini (2021-04-16)
      Invensi ini merupakan pembuatan material silika mesopori SBA-15 dari sumber silika baru yaitu abu daun bambu petung (Dendrocalamus asper). Invensi ini berkaitan dengan metode preparasi abu daun bambu petung yaitu perendaman ...

    • Pressurized thermal and hydrothermal decomposition of algae, wood chip residue, and grape marc: A comparative study 

      Subagyono, RR Dirgarini; Marshall, Marc; Jackson, W. Roy; Chaffee, Alan L. (Elsevier Ltd., 2014-08-22)
      Pressurized thermal decomposition of two marine algae, Pinus radiata chip residue and grape marc using high temperature, high pressure reactions has been studied. The yields and composition of the products obtained from ...

    • Pyrolysis of fast growing wood Macaranga gigantea: Product characterisation and kinetic study 

      Subagyono, RR Dirgarini; Miten, Polonius Dosi; Sinaga, Ruth Junita; Wijayanti, Ardiana; Qi, Ying; Marshall, Marc; Sanjaya, Ari Susandy; Chaffee, Alan L. (Elsevier BV, 2022-01-17)
      Fast-growing wood Macaranga gigantea has been pyrolyzed and its pyrolysis products have been characterized and their formation kinetics studied. Pyrolysis of M. gigantea wood was carried out by varying the temperature and ...

    • Pyrolysis-GC/MS analysis of biomass and the bio-oils produced from CO/H2O reactions 

      Subagyono, RR Dirgarini; Qi, Ying; Jackson, W. Roy; Chaffee, Alan L. (Elsevier, 2016-05-22)
      Py-GC/MS of microalgae (Chlorococcum sp.), grape marc and wood chips (Pinus radiata) and the bio-oils produced from CO/H2O reactions ofthese substrates has been studied. The Py-GC/MS technique provided a more complete ...

    • Pyrolysis-Gc/Ms Analysis of Fast Growing Wood Macaranga Species 

      Subagyono, RR Dirgarini; Qi, Ying; Chaffee, Alan L.; Amirta, Rudianto; Marshall, Marc (Universitas Pendidikan Indonesia, 2021-02-04)
      Py-GC/MS analysis of six different species of fast growing Macaranga wood has been studied. Flash pyrolysis was conducted at different temperatures (250-850 oC) under a flow of helium followed by GC/MS analysis of the ...

    • Pyrolysis-GC/MS study of fast growing wood Macaranga gigantea 

      Subagyono, RR Dirgarini; Qi, Ying; Sanjaya, Ari Susandy; Amirta, Rudianto; Chaffee, Alan L. (IOP Publishing Ltd., 2019-08-16)
      Py-GC/MS study on fast growing wood Macaranga gigantea at different temperatures has been conducted. The pyrolysis yields and chemical compounds obtained based on the pyrograms of the biomass by Py-GC analyses were compared ...

    • Reactions with CO/H2O of Two Marine Algae and Comparison withReactions under H2 and N2 

      Subagyono, RR Dirgarini; Marshall, Marc; Jackson, W. Roy; Chow, Meechin; Chaffee, Alan L. (American Chemical Society, 2014-04-21)
      The reactions of a strain of marine alga Chlorococcum sp. and of a polystrain containing a mixture of marine algae with CO/H2O have been studied. The yields and chemical composition of the products obtained from the reactions ...

    • Slow pyrolysis of fast growing wood Macaranga gigantea 

      Sinaga, Ruth Junita; Wijayanti, Ardiana; Asih, R D K; Subagyono, RR Dirgarini; Sanjaya, Ari Susandy (IOP Publishing Ltd., 2019-08-16)
      Slow pyrolysis of fast growing wood Macaranga gigantea has been studied. The product yields and chemical composition of products obtained from the experiments under different conditions (temperature, reaction time, sample ...

    • Thermo-chemical reactions of algae, grape marc and wood chips using a semi-continuous/flow-through system 

      Subagyono, RR Dirgarini; Marshall, Marc; Fei, Yi; Jackson, W. Roy; Chaffee, Alan L. (Elsevier BV, 2015-06-16)
      Chlorococcum sp., grape marc, and Pinus radiata have been reacted in a semi-continuous (flow through) system at 425 C under a flow of N2 or H2 and results compared to those from batch autoclave experiments. This paper ...

    • Thermochemical Reactions of Blue Gum and Fossil Wood with CO/H2O: Some Mechanistic Comments 

      Subagyono, RR Dirgarini; Marshall, Marc; Jackson, W. Roy; Fei, Yi; Chaffee, Alan L. (American Chemical Society, 2015-12-04)
      Our previous work suggested that liquid product yields from wood, unlike those from other biomass types, were not increased by CO/H2O reaction. Reactions of blue gum (BG) and fossil wood (FW) using high-temperature, ...