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Unlock the Compact Structure of Lignocellulosic Biomass by Mild Ball Milling for Ethylene Glycol Production
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2018-12-12 00:00:00 , DOI: 10.1021/acssuschemeng.8b04262 Jifeng Pang 1 , Mingyuan Zheng 1 , Xinsheng Li 1, 2 , Joby Sebastian 1 , Yu Jiang 1 , Yu Zhao 1 , Aiqin Wang 1 , Tao Zhang 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2018-12-12 00:00:00 , DOI: 10.1021/acssuschemeng.8b04262 Jifeng Pang 1 , Mingyuan Zheng 1 , Xinsheng Li 1, 2 , Joby Sebastian 1 , Yu Jiang 1 , Yu Zhao 1 , Aiqin Wang 1 , Tao Zhang 1
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Ball milling pretreatment was found to be an efficient method to promote the catalytic conversion of lignocellulosic biomass to ethylene glycol (EG). After 3–6 h ball milling of Miscanthus at 450 rpm, the EG yield reached about 52%, which is comparable to the result of pure cellulose conversion. The reasons of the promotion effect were investigated by characterizing the structure of biomass and the reaction residuals with X-ray diffraction, scanning electron microscopy, particle size distribution analyzer, contact angle measurement, thermogravimetric analysis-differential scanning calorimetry, and Fourier-transform infrared spectroscopy. The mild ball milling liberated (hemi)cellulose from the compact plant tissues without affecting the crystallinity of cellulose. It reduced the size of biomass to 30 μm and improved the accessibility of (hemi)cellulose, leading to a hydrophilic surface and high energy state of biomass for catalytic conversion. During the catalytic conversion, the mass transfer between sugar intermediates and heterogeneous hydrogenation catalysts were improved. Correspondingly, the self-reaction of sugar intermediates, and the reactions between sugar intermediates and lignin fractions were suppressed, resulting in the high EG yield.
中文翻译：
轻球磨制乙二醇生产木质纤维素生物质的紧凑结构
发现球磨预处理是促进木质纤维素生物质向乙二醇（EG）催化转化的有效方法。在450 rpm下对芒草进行3–6 h球磨后，EG收率达到了约52％，这与纯纤维素转化的结果相当。通过X射线衍射，扫描电子显微镜，粒度分布分析仪，接触角测量，热重分析-差示扫描量热法和傅里叶变换红外光谱法表征生物质的结构和反应残留物，研究了促进效果的原因。 。温和的球磨从紧密的植物组织中释放出（半）纤维素，而不会影响纤维素的结晶度。它可将生物质的大小减小至30μm，并改善（半）纤维素的可及性，从而导致亲水性表面和高能态的生物质用于催化转化。在催化转化过程中，糖中间体和非均相氢化催化剂之间的传质得到了改善。相应地，糖中间体的自反应以及糖中间体与木质素级分之间的反应被抑制，从而导致高EG收率。
更新日期：2018-12-12
中文翻译：
轻球磨制乙二醇生产木质纤维素生物质的紧凑结构
发现球磨预处理是促进木质纤维素生物质向乙二醇（EG）催化转化的有效方法。在450 rpm下对芒草进行3–6 h球磨后，EG收率达到了约52％，这与纯纤维素转化的结果相当。通过X射线衍射，扫描电子显微镜，粒度分布分析仪，接触角测量，热重分析-差示扫描量热法和傅里叶变换红外光谱法表征生物质的结构和反应残留物，研究了促进效果的原因。 。温和的球磨从紧密的植物组织中释放出（半）纤维素，而不会影响纤维素的结晶度。它可将生物质的大小减小至30μm，并改善（半）纤维素的可及性，从而导致亲水性表面和高能态的生物质用于催化转化。在催化转化过程中，糖中间体和非均相氢化催化剂之间的传质得到了改善。相应地，糖中间体的自反应以及糖中间体与木质素级分之间的反应被抑制，从而导致高EG收率。
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