Biomass is the only renewable organic carbon resource and is an ideal alternative to oil-producing fuels and chemicals. Therefore, the development of new routes and new methods for the conversion of biomass to fuels and chemicals is an important goal for the future development of a sustainable energy system. However, the conversion of hydrodeoxygenated oxygen-enriched biomass feedstocks into petroleum-based products requires a large amount of precious metal catalysts such as platinum, palladium, rhodium, etc., which has become an important bottleneck for large-scale biorefinery applications. Therefore, the significant reduction of the use of precious metal catalysts in the conversion of biomass feedstocks and the ultimate use of the abundant "cheap" metal elements on the planet to completely replace precious metals have become major challenges in this field. The existing research results show that non-noble metals have excellent hydrogenation properties, however, due to the easy agglomeration and loss of non-noble metals during the liquid phase catalytic process, the catalyst quickly loses its catalytic reactivity. State Key Laboratory of Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences Li Fuwei The “Hundred Talents Program†project team has made new advances in the substitution of precious metals. They coated non-precious metal nano-cobalt into acid HZSM-5 zeolite crystallites for the conversion of the biomass platform compound levulinic acid to valerate (valerates are very suitable as additives for gasoline or diesel oil, have already passed Shell The company's 250,000 km road test is hailed as a new generation of cellulose-based transportation fuels. The reaction process is carried out under liquid phase conditions and the loss of non-noble metals loaded by the impregnation process is severe. However, encapsulating the nanocobalt into the molecular sieve grains can inhibit the agglomeration and loss of metal due to the confinement effect, while the pore structure of the molecular sieve provides a molecular transport channel, so that the metal is in effective contact with the reactant molecules. The activity and stability of the catalyst were tested in a tank reactor and a fixed bed continuous reactor, respectively. The levulinic acid was completely converted, the product selectivity was over 90%, and the catalyst could be operated stably. This study provides an effective approach for the replacement of precious metals in petroleum refining and biorefinery. The results were published in ACS Catalysis (2014, 4 (11), 4136-4142) and have applied for Chinese invention patents. The team has been working on the conversion of biomass and its derivatives into fuels and chemicals in recent years. Through multi-component direct carbonation, Ru-Ni bimetallic based ordered mesoporous carbon catalysts with uniform dispersion, controllable composition and in-situ production have been successfully prepared. The catalyst was used for the preparation of γ-valerolactone by hydrogenation of levulinic acid. The single reaction TON value was about 59,000. The catalyst showed good stability. After 15 times of repeated use, no significant decrease in activity was observed. It is worth mentioning that the reaction can be carried out in water, and only the water by-products are generated during the entire reaction process, perfectly embodying the concept of green chemistry. The high activity, high stability of the catalyst, and the environmental friendliness of the reaction system have laid a good foundation for further amplification of the reaction system. The related work was published in ACS Catalysis (2014, 4 (5), 1419-1425) and applied for one Chinese invention patent. In addition, the team also developed a "metal-solid acid" bifunctional catalyst for the direct catalytic conversion of cellulose "one-pot" to prepare high value-added polyester monomer isosorbide, a water-resistant, strongly acidic mesoporous phosphate that has been developed. The ruthenium supported ruthenium catalysts can maintain strong acidity and structural stability in a hydrothermal environment, and can efficiently hydrolyze microcrystalline cellulose and catalyze subsequent hydrogenation and dehydration reactions without the use of liquid acids. The yield of isosorbide is up to 52%, which is one of the best results reported so far. The catalyst can be used in many stable cycles. This work was selected by ChemSusChem as a cover (2013, 6(11), 2190-2197) and applied for two Chinese invention patents. The above work has been funded by the Chinese Academy of Sciences “Hundred Talents Programâ€, the National Natural Science Foundation of China (21002106, 21133011, and 21373246), Lanzhou Institute of Chemical Industry “1-3â€, and the Jiangsu Provincial Natural Science Foundation (BK20130354).
PCD Turning Tools are high hardness, strong thermal conductivity and good wear resistance of diamond can obtain highmachining precision and machining efficiency in high speed cutting.
The advantages of PCD/CBN super hard cutting tool have excellent effect on turning ream and milling.
FEATURE:
Features
Flexible in order quantity:
Samples can be provided before mass production, and MOQ can be discussed accordingly.
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ABOUT US :
We are specialize in manufacturing PCD diamond tools and Carbide tools. Our major product inclulde PCD Inserts , PCD Reamers , PCD End Mills, PCD Taps, Cabide Inserts,Carbide Drills, Carbide Reams, Taps etc.,
We also offered customized cutting tools per drawings, and provide package according to customer requirements. We manufacture a series range of cutting tools for machining of Cast iron, Aluminium alloy and Non-Ferros metal, it is widely used in all major sectors like Automobiles, Engineering, Aerospace, Aviation and 3C industry. Premium quality of raw material is used in the production and strict examination during processing with advanced equipment, so our client are satisfied with our reliable quality and on-time delivery.
Our best selling of cutting tools include PCD Inserts, PCD End Mill , PCD Ball Nose Mill, PCD Reamer , Carbide Taps , Carbide End Mill , Special Form Cutter and many more. For these years we have been made a large forward in the technologies of manufacturing cutting tools. With high quality on performance and price, our product sells well both on domestic and overseas market. And we will always focus on the quality and best service, to make long business relationship.
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We have dedicated team of quality control and precise equipment to keep good and stable performance for our products and processing services.
PCD Turning Tools PCD Turning Tools,Turning Tool,Lathe Cutting Tools,Metal Lathe Cutting Tools OPT Cutting Tools Co., Ltd. , https://www.optdiamondtools.com
The high hardness of diamond is combined with the toughness of steel or alloy, and the performanceof PCD/PCBN tool is greatly improved with special treatment.
1. The PCD or PCBN Turning Tool can cut the material from different direction.
2. The PCD or PCBN turning tool can realize fast speed turning, hard material turning, and dry turning.
3. According to the need of our customers, we can design and manufacture the diamond turning tool with different specifications, by changing the sizes of the cutter arbor, rake angle, clearance angle, tool cutting edge angle, tool minor cutting edge angle, nose angle, cutting edge form and the width of the chamfering.
