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Impact of cellulose treatment with hydrotalcites in hydrothermal catalytic conversion.
Chemical Engineering Science ( IF 4.7 ) Pub Date : 2018-04-01 , DOI: 10.1016/j.ces.2018.01.014
Carlos Guarín , Llorenç Gavilà , Magda Constantí , Francesc Medina

Abstract The depletion of oil reserves pushes the development of platform chemicals from biomass, as an alternative for the sustainable progress of the chemical industry. Cellulose, which is the main component of biomass, is widely studied for its conversion into value-added chemicals. However, due to its recalcitrant nature, hydrolysis of cellulose with solid alkali catalysts still remains a challenge. Thus, the conversion of cellulose using hydrotalcites as catalyst was investigated. For this purpose, hydrotalcites were deposited on cellulose fibers and their catalytic behavior was tested at 180 °C, for 1 h, using microwave reactor (300 W). Hydrotalcites proved to efficiently convert cellulose into value-added products such as lactic, acetic, formic and glycolic acids. Catalysts were characterized by X-Ray diffraction, Fourier transform infrared spectroscopy, environmental scanning electron microscopy and BET surface area analysis. The best conversion yield of up to 30% was obtained over calcined hydrotalcites at 400 °C. The basic properties of the hydrotalcite materials have an important effect on the activity. Hence, in this study hydrotalcites are presented as a promising catalyst for cellulose hydrolysis.

中文翻译:

水滑石处理纤维素对水热催化转化的影响。

摘要 石油储量的枯竭推动了生物质平台化学品的发展,作为化学工业可持续发展的替代方案。纤维素是生物质的主要成分,因其转化为高附加值化学品而被广泛研究。然而,由于其顽固的性质,用固体碱催化剂水解纤维素仍然是一个挑战。因此,研究了使用水滑石作为催化剂的纤维素转化。为此,将水滑石沉积在纤维素纤维上,并使用微波反应器 (300 W) 在 180 °C 下测试其催化行为 1 小时。水滑石被证明可以有效地将纤维素转化为增值产品,如乳酸、乙酸、甲酸和乙醇酸。催化剂通过 X 射线衍射表征,傅里叶变换红外光谱、环境扫描电子显微镜和 BET 表面积分析。在 400 °C 下煅烧的水滑石获得了高达 30% 的最佳转化率。水滑石材料的基本性质对其活性有重要影响。因此,在这项研究中,水滑石被认为是纤维素水解的一种有前途的催化剂。
更新日期:2018-04-01
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