37results about How to "Sulfur resistance" patented technology

A solid oxide fuel battery anode and the preparation method, the characteristic is: adulterates the titanic mine cadmium acid lanthanum or the titanate compound oxide as the anode structure framework and the main electron conducting phase, uses the ion infusing method, the macromolecule modeling board method, the sol-gel method, or the suspending grain pulp spreading method, prepares the nanometer grain anode active substance multi-hole film with the thickness of 0.05-5 micron in the inner and outer hole surface of the multi-hole anode structure framework; the anode active substance includes the ceric oxide, or the adulterating ceric oxide, or the zirconia based oxygen ionic conductor electrolyte, or the cerate based proton conductor electrolyte, or the mixture of the above active substance, or the above active substance adding a small quantity of Ni or Ni-Cu and V2O5. The invention is structure stabilization, high conducting rate, high catalyzing activity of the fuel oxidation, matching with the closing material at physics and chemistry, structure size stabilization, anti-carbon deposition, is fit for the fuel operation of the hydrocarbon directly.

The invention relates to a solid oxide fuel cell anode/electrolyte double-layer membrane and a preparation method thereof. The porous yttrium oxide stabilized zirconia (YSZ) anode structure thick film green body is prepared by a tape casting method, and the screen printing method is used here. Thick-film deposited electrolyte layer, co-sintered at a certain temperature to obtain a porous YSZ structure skeleton/dense electrolyte double-layer film, using the impregnation method to deposit nano-electrocatalysts on the inner and outer surfaces of the anode structure skeleton, and calcining at a lower temperature. Anode/electrolyte bilayer membrane. The advantages of the present invention are that the formed porous anode support has a long-term structural stability in a reducing atmosphere, has high electronic conductivity, can withstand multiple oxidation-reduction cycles, is resistant to carbon deposition, and has sulfur resistance. Low cost and scalable preparation process, multilayer films of various sizes can be prepared, and have good industrialization prospects.

The invention is composition gasifying low-carbon mixing alcohol catalyst and its preparation method and utilization. The weight percentages of the catalyst are: Mo: 20-40%, Ni: 4-10%, Mn: 0.1-1.0%, K: 5-15%, Fe: 5-10%, S: 20-40%, the cohesive agent: 10-20%. The preparation method is to add ammonium molybdate to ammonium sulfide solution to react to get thiosulfate ammonium molybdate solution; drop in nickel and manganese salt solution and the thiosulfate ammonium molybdate solution, and through heating, filtering, cleaning, depositing and drying to get molybdenum nickel manganese multi-sulfur compound; mix molysite with citric acid and carry out heating reaction to get molysite C; mix molybdenum nickel manganese multi-sulfur compound, kali salt and molysite C, abrade them, lead in indifferent protective gas to burn to get molybdenum nickel manganese kalium sulfur compound; add cohesive agent to mix, press and form. The catalyst of the invention has high activity, high selectivity and good stability.

The invention provides a hydrogenation catalyst for polycyclic aromatic hydrocarbons. The hydrogenation catalyst is a molybdenum disulfide (MoS2) catalyst prepared in a microemulsion system. The molybdenum disulfide catalyst provided by the invention has the advantages of sulfur tolerance, high hydrodesulfurizing activity, high polycyclic-aromatic-hydrocarbon hydrogenation activity, simplicity in process operation, and the like.

The invention discloses a 120ksi primary grade sulfur-resistant drill pipe, which comprises the following chemical elements in percentage by weight: 0.24 to 0.30 percent of C, 0.1 to 0.5 percent of Si, 0.8 to 1.4 percent of Mn, 0.8 to 1.4 percent of Cr, 0.5 to 0.8 percent of Mo, 0.05 to 0.10 percent of V, 0.01 to 0.05 percent of Nb, 0.002 to 0.007 percent of Ca, less than or equal to 0.015 percent of P, less than or equal to 0.005 percent of S, and the balance of Fe and other inevitable impurities. Correspondingly, the invention also provides a manufacturing process of the 120ksi primary grade sulfur-resistant drill pipe, wherein the 120ksi primary grade sulfur-resistant drill pipe has a certain capability of sulfur resistance while maintaining the strength of 120ksi grade by controlling a quenching step and a tempering step. Furthermore, the primary sulfur-resistant drill pipe has the advantage of low cost.

The invention relates to a method for preparing a low-temperature SCR (Selective Catalytic Reduction) denitration catalyst. The catalyst comprises the following raw materials: attapulgite, tetrachlorostannane pentahydrate, iron nitrate nonahydrate, cerium nitrate hexahydrate, barium nitrate, citric acid and ethyl alcohol. The method comprises the following three steps of: (1) pretreatment of the attapulgite; (2) composite deposition of active constituents and the attapulgite; and (3) calcination of the composite catalyst, wherein an intermittent stirring acid treatment method is adopted in the pretreatment step; the method for preparing the composite catalyst is a sol-hydrothermal method; and a temperature programmed calcination method is adopted in the catalyst calcining step. The method is low in production cost and simple in operation and the prepared denitration composite catalyst is good in low temperature performance, high in efficiency and renewable.

The invention discloses a sulfur-tolerant methanation catalyst used for production of methane from synthetic gas. The catalyst is an impregnation catalyst mainly adopting oxides of Mo, Ni and W as active components, Al2O3 as a carrier and P2O5 as an assistant. The catalyst is used for synthetic gas with the H2S content being smaller than 400ppm, and realizes a good methanation reaction and good selectivity under a pressure of 1-4Mpa at a temperature of 300-550DEG C on the premise of no deep evolution of the synthetic gas. The invention also discloses a preparation method of the sulfur-tolerant methanation catalyst.

Sulfur-resistant synergized platinum group metals (SPGM) catalysts with significant oxidation capabilities are disclosed. Catalytic layers of SPGM catalyst samples are produced using conventional synthesis techniques to build a washcoat layer completely or substantially free of PGM material. The SPGM catalyst includes a washcoat layer comprising YMnO₃ perovskite and an overcoat layer including a Pt composition deposited on a plurality of support oxides with total PGM loading of about 5 g/ft³. Resistance to sulfur poisoning and catalytic stability is observed under 1.3 gS/L condition to assess the influence that selected support oxides have on the DOC performance of the SPGM catalysts. The results indicate SPGM catalysts produced to include a layer of low amount of PGM catalyst material deposited on a plurality of support oxides added to a layer of ZPGM catalyst material are capable of providing significant improvements in sulfur resistance of SPGM catalyst systems.

The invention provides a Cu-SAPO-34 molecular sieve, a preparation method thereof and application of the Cu-SAPO-34 molecular sieve in selective catalytic reduction denitration. The invention also provides an SAPO-34 molecular sieve containing copper metal ions through one-step hydrothermal synthesis and a preparation method of the SAPO-34 molecular sieve. The Cu-SAPO-34 molecular sieve comprisesthe following components in parts by weight: a) 21-35.5 parts of SiO2; b) 38.5 to 47.5 parts of Al2O3; c) 22.5 to 27.5 parts of P2O5 (phosphorus pentoxide); and d) 2.5-6 parts of a copper-ammonia complex. The method provided by the invention can regulate and control the copper content and the silica-alumina ratio, and has the characteristics of low cost, simple process, environmental friendlinessand the like. The Cu-SAPO-34 molecular sieve catalyst provided by the invention has relatively high NOx removal efficiency, good low-temperature activity and a relatively wide active temperature window, and can still maintain excellent reaction activity at a relatively high space velocity.

The invention discloses a vanadium-doped OMS-2 loaded TiO2 material as well as a preparation method and application thereof, titanium dioxide, a vanadium source, potassium permanganate and a manganese source are dispersed or dissolved in deionized water, and a product V-OMS-2 (at) TiO2 is formed through a hydrothermal method. The OMS-2 loaded TiO2 catalyst can catalyze two toxic gases of nitric oxide and carbon monoxide in flue gas to react at low temperature to generate two non-toxic gases of nitrogen and carbon dioxide, so that the purposes of low-temperature denitration and waste control by waste are achieved, the denitration rate can reach 80% or above at the temperature of 150 DEG C, the denitration rate can reach 90% or above at the temperature of 300 DEG C, and the denitration rate can reach 90% or above at the temperature of 300 DEG C. And the obtained catalyst material has sulfur dioxide resistance, and can maintain a denitration rate of 62.3% at 150 DEG C and a denitration rate of 87.8% at 300 DEG C in the presence of SO2.