4results about How to "Lower Diffusion Limits" patented technology

This invention provides a method and system for producing needle coke from ethylene tar. The method includes the following steps: (1) ethylene tar feedstock is mixed with hydrogen-containing gas and then enters a hydrogenation reaction zone, where it is reacted sequentially with at least two hydrogenation catalyst beds; (2) the reaction effluent obtained in step (1) is separated into gaseous and liquid phase products; (3) the liquid phase product obtained in step (2) enters a coking unit, and the oil and gas generated in the reaction are separated to obtain gas, light component oil, middle distillate oil, and heavy distillate oil. After the reaction cycle is completed, the final needle coke product is obtained. In the hydrogenation reaction zone mentioned in step (1), compared with the hydrogenation catalyst in the adjacent upstream hydrogenation catalyst bed, the proportion of mesopores >30nm in the downstream hydrogenation catalyst bed is reduced, and the proportion of mesopores <5nm in the upstream hydrogenation catalyst bed is increased. The method can suppress the formation of coking precursors and produce high-quality needle coke products.

The invention discloses a coking crude benzene catalytic hydrofining method, which belongs to the technical field of crude benzene hydrofining, and comprises the following steps: preparing a catalyst carrier; preparing a catalyst impregnation liquid; preparing a catalytic hydrogenation catalyst; performing catalytic hydrofining; and separating the components. The rectorite and the pollen are combined by adopting a high-temperature co-carbonization technology to form the modified carbonized pollen with a hierarchical porous structure, so that the adsorbability, the thermal stability and the catalytic performance are remarkably enhanced. According to the hollow-structure catalyst nanoparticles prepared through the Kirkendall effect, active sites are increased, internal diffusion of reactants and products is promoted, and the catalytic efficiency is effectively improved. Meanwhile, the chelation of the ionic liquid and the synergistic effect of the oxygen-containing functional group realize the effective load of the catalyst carrier and the catalyst body, enhance the stability and service life of the catalyst, enhance the catalysis and desulfurization performance of the catalyst, and provide a new way for realizing efficient and environment-friendly chemical production.

The application discloses a catalytic wet oxidation catalytic material and a preparation method thereof. The catalytic wet oxidation catalytic material takes acid modified montmorillonite loaded with copper oxide and optional nano ferrous sulfide as a matrix layer, and the outer surface of the matrix layer is wrapped with an active layer which is alumina loaded with nano ferrous sulfide; the matrix layer and the active layer are in a core-shell structure; the weight of the copper oxide accounts for 2-10% of the weight of the catalytic material, and the weight of the nano ferrous sulfide accounts for 5-20% of the weight of the catalytic material. The application further provides a preparation method of the catalytic wet oxidation catalytic material. The catalytic material has excellent catalytic degradation capacity for organic pollutants when used for treating organic wastewater.

The application relates to the technical field of energy storage materials, and discloses a preparation method of a quasi-parallel arrangement structure MXene-rGO material loaded with RuO2 quantum dots and application of the quasi-parallel arrangement structure MXene-rGO material loaded with RuO2 quantum dots in a practical horizontal loading electrode. GO and MXene colloid are mixed, heated and gelled, and then immersed in a RuCl3 solution; the pH value is adjusted to 7 by using a NaOH solution to form a MXene-rGO hydrogel loaded with Ru(OH)3; after washing, drying and annealing, a MXene-rGO-RuO2 composite material is obtained. In the preparation process, the loading of Ru(OH)3 causes the mechanical flexibility of the two-dimensional nanosheet layer to decrease, and hydrogen bonds are formed with the end groups, so that the two-dimensional nanosheet layer is in a quasi-parallel arrangement structure, and the ion diffusion limitation in the practical horizontal loading electrode is reduced. The hydrogel structure and proper Ru 3+ immersion liquid ensure that Ru 3+ quantum dots are uniformly distributed, and the electrochemical active sites are fully exposed.