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Akarin Boonsombuti Apanee Luengnaruemitchai Sujitra Wongkasemjit 《Cellulose (London, England)》2013,20(4):1957-1966
Bioethanol produced from a conventional fermentation process using Saccharomyces cerevisiae utilizing pretreated and hydrolyzed corncob as a substrate was studied. It was found that the morphology of corncob was significantly changed after microwave-assisted alkali pretreatment was applied. An increase in the crystallinity index and surface area of the pretreated corncob was also observed. The highest total sugar concentration of 683.97 mg/g of pretreated corncob, or 45.60 g L?1, was obtained from the optimum pretreatment conditions of 2 % NaOH at 100 °C for 30 min in a microwave oven. Microwave-assisted alkali pretreatment was an efficient way to improve the enzymatic hydrolysis accessibility of corncob in a shorter amount of time and at a lower temperature, compared to other methods. 相似文献
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Eaimsumang Srisin Prataksanon Piyachat Pongstabodee Sangobtip Luengnaruemitchai Apanee 《Research on Chemical Intermediates》2020,46(2):1235-1254
Research on Chemical Intermediates - Titania (TiO2) supports with anatase (A), mixed, and rutile (R) crystalline phases were prepared via the hydrothermal treatment of titanium isopropoxide and... 相似文献
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Pisitpong Intarapong Sotsanan Iangthanarat Pitchaya Phanthong Apanee Luengnaruemitchai Samai Jai-In 《天然气化学杂志》2013,(5):690-700
The catalytic performance of KOH/mordenite has been studied for transesterification of palm oil using a batch reactor and a packed-bed reactor at 60 C and atmospheric pressure.The KOH/mordenite processed transesterification in the batch reactor gave the highest methyl ester yield of96.7%under optimum conditions,while a methyl ester content over 94.5%was obtained in the packed-bed reactor.This comparison indicates that transesterification in a batch-type reactor gives a higher methyl ester yield than that of a continuous-flow reactor.Dealumination was found in the calcined catalysts and had a significant effect on the physical structure and chemical composition of the catalysts.Leaching of the potassium species was negligible,whereas depositing and washing of the reacted mixture with acetone on the catalyst surface were observed by FTIR. 相似文献
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Tidarat Komolwanich Patomwat Tatijarern Sirirat Prasertwasu Darin Khumsupan Thanyalak Chaisuwan Apanee Luengnaruemitchai Sujitra Wongkasemjit 《Cellulose (London, England)》2014,21(3):1327-1340
Two-stage microwave (microwave/NaOH pretreatment followed by microwave/H2SO4 pretreatment) was used to release monomeric sugars from Kans grass (Saccharum spontaneum) and Giant reed (Arundo donax). The optimum pretreatment conditions were investigated, and the maximum monomeric sugar yields were compared. The microwave-assisted NaOH and H2SO4 pretreatments with a 15:1 liquid-to-solid ratio were studied by varying the chemical concentration, reaction temperature, and reaction time to optimize the amount of monomeric sugars. The maximum amounts of monomeric sugars released from microwave-assisted NaOH pretreatment were 6.8 g/100 g of biomass [at 80 °C/5 min, 5 % (w/v) NaOH for S. spontaneum and at 120 °C/5 min, 5 % (w/v) NaOH for A. donax]. Furthermore, the maximum amounts of monomeric sugars released from microwave-assisted H2SO4 pretreatment of S. spontaneum and A. donax were 33.8 [at 200 °C/10 min, 0.5 % (w/v) H2SO4] and 31.9 [at 180 °C/30 min, 0.5 % (w/v) H2SO4] g/100 g of biomass, respectively. The structural changes of S. spontaneum and A. donax were characterized using Fourier transform infrared spectroscopy and scanning electron microscopy. 相似文献
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Chayaporn Sasiporn Thunyaratchatanon Chachchaya Luengnaruemitchai Apanee 《Research on Chemical Intermediates》2020,46(9):4173-4192
Research on Chemical Intermediates - The effect of the ceria–zirconia (CeO2–ZrO2) support composition of a gold (Au) catalyst (Au/Ce1?xZrxO2, where x is the molar ratio), prepared... 相似文献
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Srisuk Fuangfa Chinwatpaiboon Piyawat Atjayutpokin Thanaphat Boonsombuti Akarin Savarajara Ancharida Luengnaruemitchai Apanee 《Cellulose (London, England)》2021,28(14):9117-9134
Cellulose - Immobilization of microbe cells has been considered as a potential alternative for enhancing biobutanol productivity through acetone-butanol-ethanol (ABE) fermentation. Vetiver grass... 相似文献
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Rujirat Longloilert Thanyalak Chaisuwan Apanee Luengnaruemitchai Sujitra Wongkasemjit 《Journal of Sol-Gel Science and Technology》2012,61(1):133-143
Chromium and cerium incorporated into MCM-48 framework are hydrothermally synthesized via sol–gel process without any additives
and characterized by X-ray diffraction, N2 adsorption/desorption, Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), Diffuse reflectance UV–vis
spectroscopy, and Thermogravimetric analysis. Results indicate that the materials possess a long-range ordered structure,
high specific surface area, and narrow pore size distribution. SEM images illustrate the edge-truncated octahedron morphology
of Cr-MCM-48 while Ce-MCM-48 preserves the truncated octahedron of the MCM-48 parent material. TEM images show the pore network
of Ia3d symmetry after loading metals. Spectroscopic data confirm the existence of metals in the framework and extra-framework. At
low Cr content, Cr-MCM-48 contains only Cr(VI) species while rich Cr content loading results in both the Cr(VI) and Cr(III)
species. The hydrothermal stability of MCM-48 is enhanced by carefully incorporating metals into the parent material. 相似文献
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Rujirat?Longloilert Thanyalak?Chaisuwan Apanee?Luengnaruemitchai Sujitra?WongkasemjitEmail author 《Journal of Sol-Gel Science and Technology》2011,58(2):427-435
High-quality cubic MCM-48 is successfully synthesized using a new silica source known as silatrane and cetyltrimethylammonium
bromide (CTAB) as the structure-directing agent via sol–gel process. The effects of synthesis parameters, viz. crystallization
temperature, crystallization time, surfactant concentration, quantity of NaOH, and silica source, on the product structure
are investigated. The synthesized samples are characterized using X-ray diffractometer (XRD), N2 adsorption–desorption isotherms, and electron microscopy. Optimally, this product is synthesized from samples crystallized
at 140°C for 16 h with a CTAB/SiO2 ratio of 0.3 and NaOH/SiO2 ratio of 0.5. The XRD result exhibits a well-resolved pattern, corresponding to the Ia3d space group of MCM-48. The BET surface area of this product is as high as 1,300 m2/g with a narrow pore-size distribution of 2.86 nm. The scanning electron microscopic (SEM) images also show the truncated
octahedral shape and well-ordered pore system of MCM-48 particles. 相似文献
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