Recently, the team of Ma Longlong, a researcher at the Guangzhou Institute of Energy Research, Chinese Academy of Sciences, has successfully developed a Ni @ C catalyst, which has achieved a one-step aqueous phase conversion of cellulose-ethanol, making a breakthrough in the field of chemical catalytic preparation of cellulose ethanol.
At present, the massive consumption of fossil energy has caused serious energy crisis and increasingly severe environmental problems. Therefore, the demand for finding renewable and environmentally friendly resources to replace fossil energy is becoming more urgent. As an important renewable resource, lignocellulosic biomass has the advantages of large storage, wide distribution, and easy availability, and is considered to be an important carbon source for the production of chemicals and fuels. Ethanol is a high-quality fuel additive and a versatile popular chemical. Especially as a new alternative energy source composed of fuel additives and gasoline, it has the advantages of saving petroleum resources and reducing automobile exhaust pollution. However, the traditional bioethanol is produced by enzymolysis-fermentation with long production cycle, the reactant enzyme is expensive, the production process is toxic, and there are production bottlenecks such as theoretical yield (67%) and limit concentration (10wt% -12wt%). So that the economics of its technology are facing severe challenges. In contrast, the production route for efficiently converting cellulose such as non-edible straw, leaves, agricultural and forestry wastes, and urban and rural organic waste into cellulose ethanol through chemical catalytic methods has a simple process, high efficiency, and existing chemical production facilities Unique advantages such as easy docking have aroused widespread concern among researchers.
Ma Longlong's research team successfully developed the Ni @ C catalyst. By precisely adjusting the structure of the catalyst, a one-step aqueous phase conversion of cellulose to ethanol was achieved. The yield was as high as 69%. The concentration of ethanol obtained under high concentration cellulose reaction conditions was as high as 8.9. The wt% is equivalent to the theoretical yield of the enzymolysis-fermentation method. The study found that the cyclic diester complex formed by H3PO4 and the intermediate product glucose produced by ethanol can effectively activate the latter, and the CC and N in the glucose molecule can be precisely broken by the negatively charged Ni @ C catalyst and hydrogenolysis. The CO bond produces ethanol. This research department is the first to achieve a one-step conversion of cellulose to ethanol on a non-precious metal catalyst, which provides a new way for the efficient and low-cost industrial production of cellulose ethanol. Related work (Selective Cellulose Hydrogenolysis to Ethanol Using Ni @ C Combined with Phosphoric Acid Catalysts, DOI: 10.1002 / cssc.201901110) was selected as the front cover article and published in ChemSusChem.
The above research work was supported by the National Natural Science Foundation of China (51536009), the National Key Research and Development Project (2018YFB1501402, 2017YFE0106600) and the Collaborative Fund of the Chinese Academy of Sciences Clean Energy Innovation Institute (DNL180302).
Pyrite Used in Lithium Batteries as Battery Anode Materials
Material for lithium battery cathode
Place of Origin: Henan Luoyang, China
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Product Description:
Detailed introduction: it is used as cathode material for lithium battery, which has the advantages of low cost, large capacity, environmental protection and good voltage platform.
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