The Experts below are selected from a list of 2175 Experts worldwide ranked by ideXlab platform

Jungho Jae - One of the best experts on this subject based on the ideXlab platform.

  • Hydrothermal Liquefaction of Concentrated Acid Hydrolysis Lignin in a Bench-Scale Continuous Stirred Tank Reactor
    Energy & Fuels, 2019
    Co-Authors: Ivan Kristianto, Dong Jin Suh, Susan Olivia Limarta, Young-kwon Park, Youngdo Jeong, Jungho Jae
    Abstract:

    Although numerous studies on the liquefaction of lignin for the production of high-yield and high-quality bio-oil have been performed in a batch reactor, studies using a continuous flow reactor are...

  • effective depolymerization of Concentrated Acid Hydrolysis lignin using a carbon supported ruthenium catalyst in ethanol formic Acid media
    Bioresource Technology, 2017
    Co-Authors: Dong Jin Suh, Ivan Kristianto, Susan Olivia Limarta, Hyunjoo Lee, Jungho Jae
    Abstract:

    Lignin isolated by two-step Concentrated Acid Hydrolysis of empty fruit bunch (EFB) was effectively depolymerized into a high-quality bio-oil using formic Acid (FA) as an in-situ hydrogen source and Ru/C as a catalyst in supercritical ethanol. A bio-oil yield of 66.3wt% with an average molecular weight of 822g/mol and an aromatic monomer content of 6.1wt% was achieved at 350°C and a FA-to-lignin mass ratio of 3 after a reaction time of 60min. The combination of Ru/C and FA also resulted in a significant reduction in the oxygen content of the bio-oil by ∼60% and a corresponding increase in the higher heating value (HHV) to 32.7MJ/kg due to the enhanced hydrodeoxygenation activity. An examination of the FA decomposition characteristics revealed that Ru/C provides a greater increase in the rate of hydrogen production from FA, explaining the efficient depolymerization of lignin in a combined system.

  • Effective depolymerization of Concentrated Acid Hydrolysis lignin using a carbon-supported ruthenium catalyst in ethanol/formic Acid media.
    Bioresource technology, 2017
    Co-Authors: Ivan Kristianto, Dong Jin Suh, Susan Olivia Limarta, Hyunjoo Lee, Jungho Jae
    Abstract:

    Lignin isolated by two-step Concentrated Acid Hydrolysis of empty fruit bunch (EFB) was effectively depolymerized into a high-quality bio-oil using formic Acid (FA) as an in-situ hydrogen source and Ru/C as a catalyst in supercritical ethanol. A bio-oil yield of 66.3wt% with an average molecular weight of 822g/mol and an aromatic monomer content of 6.1wt% was achieved at 350°C and a FA-to-lignin mass ratio of 3 after a reaction time of 60min. The combination of Ru/C and FA also resulted in a significant reduction in the oxygen content of the bio-oil by ∼60% and a corresponding increase in the higher heating value (HHV) to 32.7MJ/kg due to the enhanced hydrodeoxygenation activity. An examination of the FA decomposition characteristics revealed that Ru/C provides a greater increase in the rate of hydrogen production from FA, explaining the efficient depolymerization of lignin in a combined system.

Dong Jin Suh - One of the best experts on this subject based on the ideXlab platform.

  • Hydrothermal Liquefaction of Concentrated Acid Hydrolysis Lignin in a Bench-Scale Continuous Stirred Tank Reactor
    Energy & Fuels, 2019
    Co-Authors: Ivan Kristianto, Dong Jin Suh, Susan Olivia Limarta, Young-kwon Park, Youngdo Jeong, Jungho Jae
    Abstract:

    Although numerous studies on the liquefaction of lignin for the production of high-yield and high-quality bio-oil have been performed in a batch reactor, studies using a continuous flow reactor are...

  • effective depolymerization of Concentrated Acid Hydrolysis lignin using a carbon supported ruthenium catalyst in ethanol formic Acid media
    Bioresource Technology, 2017
    Co-Authors: Dong Jin Suh, Ivan Kristianto, Susan Olivia Limarta, Hyunjoo Lee, Jungho Jae
    Abstract:

    Lignin isolated by two-step Concentrated Acid Hydrolysis of empty fruit bunch (EFB) was effectively depolymerized into a high-quality bio-oil using formic Acid (FA) as an in-situ hydrogen source and Ru/C as a catalyst in supercritical ethanol. A bio-oil yield of 66.3wt% with an average molecular weight of 822g/mol and an aromatic monomer content of 6.1wt% was achieved at 350°C and a FA-to-lignin mass ratio of 3 after a reaction time of 60min. The combination of Ru/C and FA also resulted in a significant reduction in the oxygen content of the bio-oil by ∼60% and a corresponding increase in the higher heating value (HHV) to 32.7MJ/kg due to the enhanced hydrodeoxygenation activity. An examination of the FA decomposition characteristics revealed that Ru/C provides a greater increase in the rate of hydrogen production from FA, explaining the efficient depolymerization of lignin in a combined system.

  • Effective depolymerization of Concentrated Acid Hydrolysis lignin using a carbon-supported ruthenium catalyst in ethanol/formic Acid media.
    Bioresource technology, 2017
    Co-Authors: Ivan Kristianto, Dong Jin Suh, Susan Olivia Limarta, Hyunjoo Lee, Jungho Jae
    Abstract:

    Lignin isolated by two-step Concentrated Acid Hydrolysis of empty fruit bunch (EFB) was effectively depolymerized into a high-quality bio-oil using formic Acid (FA) as an in-situ hydrogen source and Ru/C as a catalyst in supercritical ethanol. A bio-oil yield of 66.3wt% with an average molecular weight of 822g/mol and an aromatic monomer content of 6.1wt% was achieved at 350°C and a FA-to-lignin mass ratio of 3 after a reaction time of 60min. The combination of Ru/C and FA also resulted in a significant reduction in the oxygen content of the bio-oil by ∼60% and a corresponding increase in the higher heating value (HHV) to 32.7MJ/kg due to the enhanced hydrodeoxygenation activity. An examination of the FA decomposition characteristics revealed that Ru/C provides a greater increase in the rate of hydrogen production from FA, explaining the efficient depolymerization of lignin in a combined system.

  • Comparative study on two-step Concentrated Acid Hydrolysis for the extraction of sugars from lignocellulosic biomass.
    Bioresource technology, 2014
    Co-Authors: Yanuar Philip Wijaya, Robertus Dhimas Dhewangga Putra, Vania Tanda Widyaya, Dong Jin Suh, Chang-soo Kim
    Abstract:

    Abstract Among all the feasible thermochemical conversion processes, Concentrated Acid Hydrolysis has been applied to break the crystalline structure of cellulose efficiently and scale up for mass production as lignocellulosic biomass fractionation process. Process conditions are optimized by investigating the effect of decrystallization sulfuric Acid concentration (65–80 wt%), Hydrolysis temperature (80 °C and 100 °C), Hydrolysis reaction time (during two hours), and biomass species (oak wood, pine wood, and empty fruit bunch (EFB) of palm oil) toward sugar recovery. At the optimum process condition, 78–96% sugars out of theoretically extractable sugars have been fractionated by Concentrated sulfuric Acid Hydrolysis of the three different biomass species with 87–90 g/L sugar concentration in the hydrolyzate and highest recalcitrance of pine (softwood) was determined by the correlation of crystallinity index and sugar yield considering reaction severity.

Ivan Kristianto - One of the best experts on this subject based on the ideXlab platform.

  • Hydrothermal Liquefaction of Concentrated Acid Hydrolysis Lignin in a Bench-Scale Continuous Stirred Tank Reactor
    Energy & Fuels, 2019
    Co-Authors: Ivan Kristianto, Dong Jin Suh, Susan Olivia Limarta, Young-kwon Park, Youngdo Jeong, Jungho Jae
    Abstract:

    Although numerous studies on the liquefaction of lignin for the production of high-yield and high-quality bio-oil have been performed in a batch reactor, studies using a continuous flow reactor are...

  • effective depolymerization of Concentrated Acid Hydrolysis lignin using a carbon supported ruthenium catalyst in ethanol formic Acid media
    Bioresource Technology, 2017
    Co-Authors: Dong Jin Suh, Ivan Kristianto, Susan Olivia Limarta, Hyunjoo Lee, Jungho Jae
    Abstract:

    Lignin isolated by two-step Concentrated Acid Hydrolysis of empty fruit bunch (EFB) was effectively depolymerized into a high-quality bio-oil using formic Acid (FA) as an in-situ hydrogen source and Ru/C as a catalyst in supercritical ethanol. A bio-oil yield of 66.3wt% with an average molecular weight of 822g/mol and an aromatic monomer content of 6.1wt% was achieved at 350°C and a FA-to-lignin mass ratio of 3 after a reaction time of 60min. The combination of Ru/C and FA also resulted in a significant reduction in the oxygen content of the bio-oil by ∼60% and a corresponding increase in the higher heating value (HHV) to 32.7MJ/kg due to the enhanced hydrodeoxygenation activity. An examination of the FA decomposition characteristics revealed that Ru/C provides a greater increase in the rate of hydrogen production from FA, explaining the efficient depolymerization of lignin in a combined system.

  • Effective depolymerization of Concentrated Acid Hydrolysis lignin using a carbon-supported ruthenium catalyst in ethanol/formic Acid media.
    Bioresource technology, 2017
    Co-Authors: Ivan Kristianto, Dong Jin Suh, Susan Olivia Limarta, Hyunjoo Lee, Jungho Jae
    Abstract:

    Lignin isolated by two-step Concentrated Acid Hydrolysis of empty fruit bunch (EFB) was effectively depolymerized into a high-quality bio-oil using formic Acid (FA) as an in-situ hydrogen source and Ru/C as a catalyst in supercritical ethanol. A bio-oil yield of 66.3wt% with an average molecular weight of 822g/mol and an aromatic monomer content of 6.1wt% was achieved at 350°C and a FA-to-lignin mass ratio of 3 after a reaction time of 60min. The combination of Ru/C and FA also resulted in a significant reduction in the oxygen content of the bio-oil by ∼60% and a corresponding increase in the higher heating value (HHV) to 32.7MJ/kg due to the enhanced hydrodeoxygenation activity. An examination of the FA decomposition characteristics revealed that Ru/C provides a greater increase in the rate of hydrogen production from FA, explaining the efficient depolymerization of lignin in a combined system.

Susan Olivia Limarta - One of the best experts on this subject based on the ideXlab platform.

  • Hydrothermal Liquefaction of Concentrated Acid Hydrolysis Lignin in a Bench-Scale Continuous Stirred Tank Reactor
    Energy & Fuels, 2019
    Co-Authors: Ivan Kristianto, Dong Jin Suh, Susan Olivia Limarta, Young-kwon Park, Youngdo Jeong, Jungho Jae
    Abstract:

    Although numerous studies on the liquefaction of lignin for the production of high-yield and high-quality bio-oil have been performed in a batch reactor, studies using a continuous flow reactor are...

  • effective depolymerization of Concentrated Acid Hydrolysis lignin using a carbon supported ruthenium catalyst in ethanol formic Acid media
    Bioresource Technology, 2017
    Co-Authors: Dong Jin Suh, Ivan Kristianto, Susan Olivia Limarta, Hyunjoo Lee, Jungho Jae
    Abstract:

    Lignin isolated by two-step Concentrated Acid Hydrolysis of empty fruit bunch (EFB) was effectively depolymerized into a high-quality bio-oil using formic Acid (FA) as an in-situ hydrogen source and Ru/C as a catalyst in supercritical ethanol. A bio-oil yield of 66.3wt% with an average molecular weight of 822g/mol and an aromatic monomer content of 6.1wt% was achieved at 350°C and a FA-to-lignin mass ratio of 3 after a reaction time of 60min. The combination of Ru/C and FA also resulted in a significant reduction in the oxygen content of the bio-oil by ∼60% and a corresponding increase in the higher heating value (HHV) to 32.7MJ/kg due to the enhanced hydrodeoxygenation activity. An examination of the FA decomposition characteristics revealed that Ru/C provides a greater increase in the rate of hydrogen production from FA, explaining the efficient depolymerization of lignin in a combined system.

  • Effective depolymerization of Concentrated Acid Hydrolysis lignin using a carbon-supported ruthenium catalyst in ethanol/formic Acid media.
    Bioresource technology, 2017
    Co-Authors: Ivan Kristianto, Dong Jin Suh, Susan Olivia Limarta, Hyunjoo Lee, Jungho Jae
    Abstract:

    Lignin isolated by two-step Concentrated Acid Hydrolysis of empty fruit bunch (EFB) was effectively depolymerized into a high-quality bio-oil using formic Acid (FA) as an in-situ hydrogen source and Ru/C as a catalyst in supercritical ethanol. A bio-oil yield of 66.3wt% with an average molecular weight of 822g/mol and an aromatic monomer content of 6.1wt% was achieved at 350°C and a FA-to-lignin mass ratio of 3 after a reaction time of 60min. The combination of Ru/C and FA also resulted in a significant reduction in the oxygen content of the bio-oil by ∼60% and a corresponding increase in the higher heating value (HHV) to 32.7MJ/kg due to the enhanced hydrodeoxygenation activity. An examination of the FA decomposition characteristics revealed that Ru/C provides a greater increase in the rate of hydrogen production from FA, explaining the efficient depolymerization of lignin in a combined system.

Richard Berry - One of the best experts on this subject based on the ideXlab platform.

  • Acid mediated chemical treatment to remove sugar from waste Acid stream from nano-crystalline cellulose manufacturing process.
    Carbohydrate polymers, 2017
    Co-Authors: Sampa Maiti, Saurabh Jyoti Sarma, Satinder Kaur Brar, Rama Pulicharla, Richard Berry
    Abstract:

    Nano-crystalline cellulose (NCC) is a nano-scale biomaterial derived from highly abundant natural polymer cellulose. It is industrially produced by Concentrated Acid Hydrolysis of cellulosic materials. However, presences of as high as 5–10% of sugar monomers in spent sulphuric Acid during the manufacturing process, makes it unsuitable for such recycling or reuse of sulphuric Acid. Currently, the industry has been using membrane and ion exchange technology to remove such sugars, however, such technologies cannot achieve the target of 80–90% removal. In the current investigation, thermal treatment and Acid mediated thermal treatment have been evaluated for sugar removal from the spent sulphuric Acid. Almost complete removal of sugar has been achieved by this approach. Maximum sugar removal efficiency (99.9%) observed during this study was at 120 ± 1 °C for 60 min using 0.8 ratio (sample: Acid) or at 100 ± 1 °C for 40 min using 1.5 ratio.

  • Sustainable commercial nanocrystalline cellulose manufacturing process with Acid recycling.
    Carbohydrate polymers, 2016
    Co-Authors: Saurabh Jyoti Sarma, Mariem Ayadi, Satinder Kaur Brar, Richard Berry
    Abstract:

    Nanocrystalline cellulose (NCC) is a biomaterial having potential applications in a wide range of industries. It is industrially produced by Concentrated Acid Hydrolysis of cellulosic materials. In this process, the sulfuric Acid rich liquor can be Concentrated and reused. However, removal of sugar monomers and oligomers is necessary for such recycling. Membrane and ion exchange technology can be employed to remove sugars; however, such technologies are not efficient in meeting the quality required to recycle the Acid solution. As a part of the present study, activated carbon (AC) has been evaluated as an adsorbent for sugar removal from the Acidic solution generated during commercial nanocrystalline cellulose manufacturing process. Almost complete removal of sugar can be achieved by this approach. The maximum sugar removal observed during this study was 3.4 g/g of AC. Based on this finding, a sustainable method has been proposed for commercial nanocrystalline cellulose manufacturing.