54results about How to "Promote dehydrogenation" patented technology

A heat sink is used to absorb heat produced by a vehicle. The heat sink uses an endothermic catalytic alcohol dehydrogenation reaction to assist with the absorption of excess heat produced in the electronics of the vehicle. In some embodiments, the alcohol can be pre-heated by absorbing heat from various components of the vehicle. Excess heat from the various components or from the vehicle engine can be used to vaporize the reaction fluids in order to further absorb additional heat. Reaction fluids can also be sent to the vehicle's engine / burner for use as a supplemental fuel.

A preparation method of gallium-containing zeolite and its application in coal pyrolysis volatilization modification. Water, microporous template agent, NaOH and mesoporous template agent are made into a solution, and silicon source is added drop by drop, and stirred after dropping After the silicon source is hydrolyzed and dispersed, the gallium source and the aluminum source are added, and after aging, it is crystallized at 100-180°C for 2-6 days. After crystallization and roasting, ammonium nitrate ion exchange is performed, and then roasted after drying to obtain a multi-level MFI skeleton. Porous gallium-containing zeolite; the gallium-containing zeolite of the present invention can reduce the carbon deposition and deactivation of the catalyst to a certain extent; for various substances contained in coal pyrolysis volatiles, the weak acid sites formed by the framework gallium and the extra-framework gallium can be combined with molecular sieves Si‑OH‑Al (strong B acid site) can promote the dehydrogenation, cracking, oligomerization and aromatization of macroalkanes, and the formed olefins can be 2 o 3 Activation of CH under the action of 4 , to promote the conversion of methane to long-chain olefins and aromatics.

The invention relates to a method for improving the electrooxidation anti-poisoning performance of a methanol fuel cell. The present invention utilizes a solvothermal method to synthesize Pt-Ni binary metal alloy loaded with cerium oxide in one step as a catalyst to carry out methanol electrooxidation. Specifically, oleylamine oleic acid is used as a dispersant to inhibit the growth of crystals, and the added formaldehyde can CeO 2 Inducing voids on the surface of Pt‑Ni alloys to explore whether rare earth metal oxides can improve the catalyst's resistance to CO poisoning and enhance its electrocatalytic effect. We take advantage of the voids in the Pt-Ni alloy group to synthesize very small diameter CeO 2 Added to the surface of the catalyst, using CeO 2 The strong oxidation effect on CO can be used to improve the CO poisoning resistance of metal catalysts and significantly improve their electrocatalytic stability.

The invention relates to a preparation method of tetraene intermediates. According to the preparation method, a first compound is converted by Nocardioides simplex to obtain tetraene intermediates; wherein the first compound is represented by a formula I, tetraene intermediates are represented by a formula II, and R in the formula I and the formula II represents H, a halogen atom, an alkyl group,an alkoxyl group, a hydroxyl group, or a phenyl group. According to the preparation method, the first compound is taken as the substrate, only Nocardioides simplex is used to carry out biological conversion; the substrate is subjected to 1,2-dehydrogenation and 21-acetate hydrolysis at the same time; most of the conversion products is target products, the byproduct ratio is low; after purification, the product is white or white-like crystals; relative to the weight of the substrate, the yield is 80-90%; the target product yield is high; through HPLC analysis, the purify of the product is not less than 95%; and the total content of target products and secondary products is not less than 99%.

The invention provides a method, product and application for preparing a propylene production increasing additive by utilizing Fischer-Tropsch synthesis catalyst fine powder, the method comprising the following steps: (1) mixing and stirring silica sol, kaolin and water, adding phosphoric acid solution, and mixing , to obtain slurry A; (2) adding ZSM‑5 molecular sieve and Fischer-Tropsch synthesis catalyst fine powder to the slurry A, mixing, and filtering to obtain slurry B; (3) pressurizing the slurry B Afterwards, spray drying is carried out to obtain the finished product of the propylene production-increasing auxiliary agent. The invention utilizes the Fischer-Tropsch synthesis catalyst fine powder and the ZSM-5 molecular sieve to synergistically strengthen the effect of the auxiliary agent for increasing the production of propylene and increase the yield of propylene in the liquefied gas.

The invention relates to a mesoporous silica supported tungsten-promoted nickel-based catalyst for hydrogen production by autothermal reforming of acetic acid. Aiming at the inactivation problem of anexisting catalyst in the acetic acid autothermal reforming process, the invention provides a novel catalyst with high activity, carbon deposition resistance and oxidation resistance. The molar composition of the catalyst is (NiO)a(WO3)b(SiO2)c, wherein a ranges from 0.0764 to 0.1367, b ranges from 0 to 0.0353, b is not 0, and c ranges from 0.8281 to 0.8889. According to the invention, Ni and W species are impregnated on a SiO2 carrier by adopting an impregnation method, and the stable mesoporous composite oxide catalyst containing NiWO4 and SiO2 is formed by roasting. The catalyst provided bythe invention effectively promotes acetic acid conversion, inhibits the generation of acetone and other byproducts, and improves the yield and reaction stability of hydrogen.

The invention relates to a method for preparing a steroidal drug intermediate. The method comprises the steps that microbial conversion is conducted on a first compound with Nocardioides simplex to obtain the steroid drug intermediate, the first compound is shown as a formula I, the steroidal drug intermediate is as shown in a formula II, and in the formula I and the formula II, R is H, a halogenatom, an alkyl group, an alkoxy group, a hydroxyl group or a phenyl group. The method selects 4, 9 (11)-pregnant-17-hydroxy group-3,20 dioxin-21-acetate as a substrate, uses only the Nocardioides simplex for biotransformation, dehydrogenation at position 1,2 and hydrolysis of acetate at position 21 are simultaneously conducted on the substrate, 1,4,9 (11)-pregnene-17,21-diol-3,20-dione is obtained, products formed through transformation are mainly the 1,4,9(11)-pregnene-17,21-diol-3,20-dione, the proportion of by-products is low, the purified products are white or off-white crystals, relativesubstrate weight yield is 75%-85%, a target product yield is high, after a HPLC analysis, the purity is >=99%, and external standard content is 98%.