Taiwan Sugar Corporation

Tainan, Taiwan

Taiwan Sugar Corporation

Tainan, Taiwan
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Teh Y.Y.,Universiti Sains Malaysia | Lee K.T.,Universiti Sains Malaysia | Chen W.-H.,National Cheng Kung University | Lin S.-C.,National Cheng Kung University | And 2 more authors.
Bioresource Technology | Year: 2017

This study aims to produce biochar and sugars from a macroalga Eucheuma denticulatum using dilute sulfuric acid hydrolysis along with microwave-assisted heating. The reactions were operated at sulfuric acid concentrations of 0.1 and 0.2M, reaction temperatures of 150-170°C and a heating time of 10min. Compared to the raw macroalga, biochar qualities were improved with increased carbon content and lower ash and moisture contents. The calorific value of the biochar could be intensified up to 45%, and 39% of energy yield was recovered. Apart from producing biochar, the highest total reducing sugars were 51.47g/L (74.84% yield) along with a low by-product 5-HMF of 0.20g/L, when the biomass was treated under the optimum conditions at 160°C with 0.1M H2SO4. Thus, this study demonstrated that macroalgae could be potentially used as biomass feedstock under microwave-assisted acid hydrolysis for the production of biofuel and value-added products. © 2017 Elsevier Ltd.


Bach Q.-V.,Ton Duc Thang University | Chen W.-H.,National Cheng Kung University | Sheen H.-K.,Taiwan Sugar Corporation | Chang J.-S.,National Cheng Kung University
Bioresource Technology | Year: 2017

This study aims at investigating the gasification behavior and kinetics of microalga Chlorella vulgaris ESP-31 before and after wet torrefaction. The raw and wet-torrefied microalgae were first gasified in a thermogravimetric analyzer under a continuous CO2 flow. Thereafter, the obtained thermogravimetric data were modeled for kinetic study, employing a seven-parallel-reaction mechanism. The decomposition of the microalgae in CO2 shows two reactive stages: devolatilization with two peaks and gasification with a peak accompanied by a shoulder, and the thermal decomposition of components in the samples can be clearly identified. Increasing wet torrefaction temperature lowers the height of the major devolatilization peak but enhances the height of the minor one. Moreover, the kinetic evaluation reveals that wet torrefaction affects most of the kinetic parameters of the microalgal components. Furthermore, wet torrefaction temperature influences the kinetic parameters of carbohydrate and lipid, but not on those of protein, "others", and chars. © 2017 Elsevier Ltd.


Chen W.-H.,National University of Tainan | Tu Y.-J.,National University of Tainan | Sheen H.-K.,Taiwan Sugar Corporation
Applied Energy | Year: 2011

Disruption of lignocellulosic structure of biomass plays a key role in producing bioethanol from lignocelluloses. This study investigated the impact of dilute sulfuric acid pretreatment on bagasse structure using microwave heating. Three reaction temperatures of 130, 160 and 190 °C with two heating times of 5 and 10. min were considered and a number of instruments were employed to analyze the properties of the bagasse particles. On account of microwave irradiation into the solution with dielectric heating, the experiments indicated that an increase in reaction temperature destroyed the lignocellulosic structure of bagasse in a significant way. The pretreated bagasse particles were simultaneously characterized by fragmentation and swelling. When the reaction temperature was as high as 190 °C, the fragmentation of particles became fairly pronounced so that the specific surface area of the pretreated material grew substantially. Meanwhile, almost all hemicellulose was removed from bagasse and the crystalline structure of cellulose disappeared. In contrast, the feature of lignin was remained clearly. However, a comparison between the heating times of 5 and 10. min revealed that the influence of the heating time on the lignocellulosic structure was not significant, indicating that the pretreatment with 5. min was sufficiently long. © 2011 Elsevier Ltd.


Chen W.-H.,National University of Tainan | Tu Y.-J.,National University of Tainan | Sheen H.-K.,Taiwan Sugar Corporation
International Journal of Energy Research | Year: 2010

Dilute acid pretreatment is a commonly used pretreatment method in the course of producing bioethanol from lignocellulosics and the structure variation of the lignocellulosics is highly related to the pretreatment process. To understand the impact of dilute acid pretreatment on the structure of bagasse, four different pretreatment conditions by varying heating time are considered where the bagasse and the pretreated materials are examined using a variety of analysis methods. The obtained results indicate that the thermogravimetric analysis (TGA) is able to provide a useful insight into the recognition of lignocellulosic structure. Specifically, the peak of the TGA of the pretreated materials moves toward the low temperature region, revealing that the lignocellulosic structure is loosened. However, the characteristic of crystal structure of cellulose remains in the pretreated materials. Increasing heating time enhances the pretreatment procedure; as a result, the average particle size of the investigated materials increases with heating time. This swelling behavior may be attributed to the enlarged holes inside the particles in that the surface area decreases with increasing heating time. In addition, when the heating time is increased to a certain extent (e.g. 15 min), some fragments are found at the surface and they tend to peel off from the surface. It follows that the dilute acid pretreatments have a significant effect on the bagasse structure. Copyright © 2009 John Wiley & Sons, Ltd.


Chen W.-H.,National University of Tainan | Ye S.-C.,National University of Tainan | Sheen H.-K.,Taiwan Sugar Corporation
Bioresource Technology | Year: 2012

Hydrothermal carbonization of sugarcane bagasse using wet torrefaction is studied. The biomass is torrefied in water or dilute sulfuric acid solution and microwaves are employed to heat the solutions where the reaction temperature is fixed at 180. °C. The effects of acid concentration, heating time and solid-to-liquid ratio on the performance of wet torrefaction are investigated. It is found that the addition of sulfuric acid and increasing heating time are conducive to carbonizing bagasse. The calorific value of bagasse can be increased up to 20.3% from wet torrefaction. With the same improvement in calorific value, the temperature of wet torrefaction is lower than that of dry torrefaction around 100. °C, revealing that wet torrefaction is a promising method to upgrade biomass as fuel. The calorific value of torrefied biomass can be predicted well based on proximate, elemental or fiber analysis, and the last one gives the best estimation. © 2012 Elsevier Ltd.


Chen W.-H.,National University of Tainan | Ye S.-C.,National University of Tainan | Sheen H.-K.,Taiwan Sugar Corporation
Applied Energy | Year: 2012

Pretreatment of lignocellulosic biomass is of the utmost importance for the development of bioethanol because of the abundance and low cost of lignocelluloses. To figure out the hydrolysis characteristics of sugarcane bagasse in a microwave irradiation environment, the biomass is pretreated by a dilute sulfuric acid solution at 180 °C for 30. min, with the concentration ranging from 0 to 0.02. M. A variety of analyses, including fiber analysis, TGA, XRD, FTIR and HPLC, are employed to aid in understanding the physical and chemical characteristics of residual solid particles and solutions. A higher concentration is conducive to destroying bagasse; however, the buffering capacity possessed by the biomass is also observed in the pretreatment. The experimental results indicate that around 40-44. wt% of bagasse is degraded from the pretreatment in which around 80-98% of hemicellulose is hydrolyzed. In contrast, crystalline cellulose and lignin are hardly affected by the pretreatment. The maximum yields of xylose and glucose as well as the minimum furfural selectivity occur at the acid concentration of 0.005. M. Consequently, the aforementioned concentration is recommended for bagasse pretreatment and bioethanol production. © 2011 Elsevier Ltd.


Patent
Taiwan Sugar Corporation | Date: 2015-01-22

A Melaleuca quinquenervia extract and its uses are provided. The extract is extracted by a first polar solvent, wherein the first polar solvent is a C3-C6 ethanol. The extract is especially useful for inhibiting the Wnt/-catenin signaling pathway.


Patent
Taiwan Sugar Corporation | Date: 2014-10-06

A method for determining the activity of a nucleic-acid-repair enzyme is provided. The method comprises the following steps: (i) providing a double-stranded nucleic acid molecule, which is labeled with a fluorophore and a quencher and has at least one mutated nucleotide in either strand; (ii) mixing the double-stranded nucleic acid molecule, S1 nuclease, and the sample to obtain a mixture; and measuring the fluorescence intensity of the mixture.


Patent
Taiwan Sugar Corporation | Date: 2016-01-11

A Melaleuca quinquenervia extract and its uses are provided. The extract is extracted by a first polar solvent, wherein the first polar solvent is a C3-C6 ethanol. The extract is especially useful for inhibiting the Wnt/-catenin signaling pathway.


Trademark
Taiwan Sugar Corporation | Date: 2011-08-09

Natural plants and flowers; Wreaths of natural flowers.

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