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Direct Catalytic Conversion Of Cellulose Into Formic Acid By Supported Phosphotungstic Acid Catalyst

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Direct Catalytic Conversion Of Cellulose Into Formic Acid By Supported Phosphotungstic Acid Catalyst.pdf (767.07 KB)

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2022

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Malaysian Analytical Sciences Society (ANALIS)

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Abstract

This study aims to prepare phosphotungstic acid supported on hydrotalcite (PTA-HT) for one-pot hydrothermal cellulose conversion into formic acid (FA). In this study, different percentages of PTA on HT (1, 5, 10, 15, 20, 25, and 33%) were prepared and the catalytic activity was observed for two different parameters such as time (1 to 5 hours) and reaction temperature (160 to 240 °C). The prepared catalysts were characterized using Fourier transform infrared (FTIR), X-ray powder diffraction (XRD), Brunauer-Emmet-Teller (BET) and field emission scanning electron microscopy-energy dispersive X-ray spectrometry (FESEM-EDX), while the production of FA was determined using ultra high-performance liquid chromatography (UHPLC). To avoid bias, raw PTA and calcined HT were compared with varying percentages of supported PTA. PTA-HT was successfully prepared through the impregnation method as confirmed by XRD, FTIR, BET and FESEM-EDX. According to the results, the optimum condition for cellulose conversion into formic acid was when 25% PTA-HT was applied at 220 °C for 4 hours, with a 30% cellulose conversion and 18 % FA yield. Due to the acidity and redox properties of PTA, it has been demonstrated that PTA-HT increased the catalytic activity by two-fold when compared to calcined HT alone (8%). The significance of this finding opens new suggestion of bifunctional catalyst in cellulose conversion into FA.

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Malaysian Journal of Analytical Sciences Vol 26 No 2 (2022): 303 - 317

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catalyst, cellulose, formic acid, hydrothermal, phosphotungstic acid

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https://mjas.analis.com.my/mjas/v26_n2/html/26_2_11.html
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85132633769&origin=resultslist&sort=plf-f&src=s&st1=Direct+Catalytic+Conversion+Of+Cellulose+Into+Formic+Acid+By+Supported+Phosphotungstic+Acid+Catalyst&sid=689fc01fb2bcc47664a97244227cedac&sot=b&sdt=b&sl=115&s=TITLE-ABS-KEY%28Direct+Catalytic+Conversion+Of+Cellulose+Into+Formic+Acid+By+Supported+Phosphotungstic+Acid+Catalyst%29&relpos=0&citeCnt=0&searchTerm=
 https://oarep.usim.edu.my/handle/123456789/10597

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