30results about How to "With anti-coke" patented technology

The invention relates to a solid solution catalyst for acetic acid self-heating hydrogen production by reforming. Aiming at the problem that in an acetic acid self-heating reforming reaction of an existing catalyst, by means of oxidizing, sintering, carbon depositing and other factors of the active components of the catalyst, the catalyst is inactivated, the novel catalyst is stable in structure, resistant to sintering, resistant to carbon depositing and oxidization and stable in activity, and the composition by weight of the catalyst is (NiO)a(YO1.5)b(ZrO2)c, wherein a ranges from 0.07 to 0.20, b ranges from 0.02 to 0.35, and c ranges from 0.58 to 0.91. According to the catalyst, zirconium oxide is adopted as a carrier, an aid yttrium oxide is introduced, a polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer is adopted as a template, a mesoporous structure is formed through evaporation self-assembly, and the nickel-based catalyst with the stable ZrxY1-xOy solid solution as the main structure is obtained. The hydrogen productivity, stability and carbon depositing resisting capacity of the acetic acid self-heating reforming process are effectively improved.

The invention relates to a hydrocalumite derived cobalt-based catalyst for hydrogen production by autothermal reforming of acetic acid. Directed at the problem that catalyst structure change and the oxidation and sintering of active components can cause catalyst deactivation in existing catalysts during the autothermal reforming reaction of acetic acid, the invention provides a new catalyst characterized by stable structure, sintering resistance, oxidation resistance, carbon deposition resistance, and high activity. The molar composition of the catalyst is (CaO)a(CoO)b(AlO1.5) c, wherein a is1.66-5.19, b is 0.34-0.81 and c is 1.0. The invention adopts coprecipitation method to prepare a catalyst precursor, and then roasting is carried out to obtain the Ca-Co-Al-O mesoporous composite oxide. The catalyst takes calcium oxide as the framework, contains cobalt-alumina spinel phase and a small amount of Ca12Al14O33, inhibits the acidity of the catalyst, improves the carbon deposition resistance and sintering resistance of the catalyst, and improves the activity of hydrogen production by autothermal reforming of acetic acid.

The invention relates to a Ni / La2X2O7 catalyst for hydrogen production by autothermal reforming of acetic acid. , Aiming at the problem of inactivation of an existing catalyst in the acetic acid autothermal reforming process, the invention provides the novel catalyst which is stable in structure and high in activity. A catalyst precursor is prepared by adopting a sol-gel method, and roasted by adopting an impregnation method to obtain the Ni / La2X2O7 (X is Ce, Zr or Ti) catalyst. According to the catalyst, the stability of active components is improved, the yield of hydrogen is increased, and generation of byproducts such as methane and acetone is effectively inhibited.

The invention belongs to the technical field of sulfur recovery, and in particular relates to a sulfur tail gas hydrogenation catalyst and a preparation method thereof. The raw materials of the carrier include pseudo-boehmite, modified diatomite and antioxidant additives, and the active components are molybdenum, nickel and iron; the modified diatomite is as follows: diatomite is treated with phosphoric acid, filtered, Roasting after drying to obtain modified diatomite; the specific surface area of ​​diatomite is greater than 50m 2 / g. The invention further increases the oxygen resistance by adding low-temperature catalytic active components and anti-oxidation additives, and has the characteristics of strong anti-oxidation ability, high low-temperature activity, anti-coke and adaptability to high water vapor content, and can be used to induce liquid sulfur removal The gas enters the hydrogenation reactor for treatment, which meets the new national environmental protection standards to be implemented, and has significant economic and social benefits; it can be widely used in various sulfur recovery tail gas treatment devices.

The invention relates to a hydrocalumite derived cobalt-based catalyst for hydrogen production by autothermal reforming of acetic acid. Directed at the problem that catalyst structure change and the oxidation and sintering of active components can cause catalyst deactivation in existing catalysts during the autothermal reforming reaction of acetic acid, the invention provides a new catalyst characterized by stable structure, sintering resistance, oxidation resistance, carbon deposition resistance, and high activity. The molar composition of the catalyst is (CaO)a(CoO)b(AlO1.5) c, wherein a is1.66-5.19, b is 0.34-0.81 and c is 1.0. The invention adopts coprecipitation method to prepare a catalyst precursor, and then roasting is carried out to obtain the Ca-Co-Al-O mesoporous composite oxide. The catalyst takes calcium oxide as the framework, contains cobalt-alumina spinel phase and a small amount of Ca12Al14O33, inhibits the acidity of the catalyst, improves the carbon deposition resistance and sintering resistance of the catalyst, and improves the activity of hydrogen production by autothermal reforming of acetic acid.

The invention relates to a nickel, chromium and manganese mesoporous compound oxide catalyst for acetic acid self-heating hydrogen production by reforming. In order to solve the problems that existingcatalysts are oxidized, sintered and deposited in carbon in the process of acetic acid self-heating by reforming, the invention provides a novel catalyst which is stable in structure, sintering-resistant, carbon deposition-resistant and oxidiation-resistant. The catalyst is as shown in a formula by mole: (NiO)a(MnO)b(CrO1.5)c, wherein a is 0.12-0.18, b is 0.7-0.33 and c is 0.14-0.5. The catalystis prepared by means of a coprecipitation method, and the Ni-Cr-Mn-O mesoporous compound oxide catalyst which is stable and contains spinels such as NiMn2O4, NiCr2O4 and Mn3O4 is obtained after sintering. The reducing property of active components and the stability of the catalyst are improved. In the process of acetic acid self-heating by reforming, generation of byproducts such as methane and acetone is inhibited, and the hydrogen yield is improved.

The invention relates to a cobalt-cerium-manganese composite oxide solid solution catalyst for hydrogen production by autothermal reforming of acetic acid. Aiming at the problem of catalyst deactivation of an existing catalyst in an acetic acid autothermal reforming reaction, the invention provides an efficient and stable new catalyst. The chemical component of the catalyst provided by the invention is (CoO1.5) a (CeO2) b (MnOx) c, wherein a is 0.15 to 0.19, b is 0.41 to 0.72, and c is 0.09 to 0.44. Co is used as an active component, Ce and Mn are introduced by adopting a coprecipitation method to form the Co / Ce-Mn-Ox composite oxide solid solution catalyst, generation of byproducts such as acetaldehyde and acetone in the reaction process is effectively inhibited, and the yield of hydrogenand the carbon deposition resistance, sintering resistance and oxidation resistance of the catalyst are improved.

The invention relates to a perovskite-type titanium-strontium-cobalt catalyst for hydrogen production by autothermal reforming of acetic acid and a preparation method. The catalyst with resistance tosintering, anti-carbon deposit, oxidation resistance and high activity is provided to aim at solving the problems that an existing catalyst has carbon deposits, sintering and oxidation of active components in the autothermal reforming process of acetic acid, and deactivation of the catalyst is caused. According to the perovskite-type titanium-strontium-cobalt catalyst for the hydrogen production by autothermal reforming of acetic acid and the preparation method, a sol-gel method is adopted to prepare the perovskite-type titanium-strontium-cobalt catalyst, and after calcination, a perovskite composite oxide catalyst Ti<1-x>Sr<x>CoO3 is obtained, wherein x=0-0.8. The perovskite structure facilitates the dispersion of an active component Co, strengthens the synergistic effect between the active component and a carrier, and inhibits the aggregation and growth of Co, thereby obtaining stable small-particle-size Co particles. In addition, Ti is partially replaced with Sr to increase the surface defect position and lattice defect structure of the perovskite-type catalyst, so that the carbon deposit resistance, oxidation resistance and thermal stability of the active component cobalt are improved, the diffusion of acetic acid, water vapor and oxygen is further facilitated, and the catalytic activity is increased.

The invention relates to a perovskite catalyst used for the autothermal reforming of ethanol for producing hydrogen and a preparation method thereof. Aiming at the problems of structural change, oxidation and sintering of active ingredients and deactivation of the conventional catalyst during the autothermal reforming of the ethanol, the invention provides a novel catalyst with sintering resistance, carbon deposit resistance, oxidation resistance and high activity. The chemical formula of the catalyst is LaaSrbNicXdO3, wherein X is one of Fe, Mn and Cr, a is 0.7 to 1.0, b is 0 to 0.3, c is 0.7 to 0.95 and d is 0.05 to 0.3. The nickel-based catalyst with an ABO3 perovskite structure is prepared by a glycine complexation method, lanthanum is partially substituted by strontium at a position A and nickel is partially substituted by an auxiliary agent at a position B, so oxygen defects and lattice structure defects on the surface of the perovskite catalyst are increased; meanwhile, the auxiliary agent, namely iron, magnesium or chromium is introduced, so the acidity of the catalyst is inhibited, the reducibility and stability of the active ingredients of the catalyst are improved, and the yield of the hydrogen is obviously improved and remains stable.

The invention relates to a cerium dioxide-loaded strontium-promoted cobalt-based composite oxide catalyst for hydrogen production by autothermal reforming of acetic acid. The invention provides a novel catalyst which is stable in structure and high in activity in order to solve the problem that an existing catalyst is inactivated in an acetic acid autothermal reforming reaction. The molar composition of the catalyst is (SrO) a (CoO1.5) b (CeO2) c, wherein a ranges from 0.75 to 1.75, b ranges from 1.05 to 1.15, and c ranges from 1.50 to 2.50. According to the invention, Co is used as an activecomponent; the cerium dioxide-loaded strontium-promoted cobalt-based composite oxide is prepared by adopting a hydrothermal synthesis method; according to the catalyst, cerium dioxide is used as a skeleton, the catalyst contains a small amount of cobaltosic oxide spinel phase, and the Sr-Co-Ce-O mesoporous composite oxide solid solution catalyst is formed; possible migration, aggregation and sintering of an active component cobalt under a high-temperature condition are effectively inhibited, and the hydrogen yield, sintering resistance and carbon deposition resistance in the acetic acid autothermal reforming process are improved.

The invention relates to an olivine nickel-based catalyst for preparing hydrogen through autothermal reforming of acetic acid. Aiming to solve the problems of low hydrogen yield and oxidation / sintering inactivation of active constituents of the conventional supported nickel-based catalyst in an autothermal reforming process of acetic acid, the invention provides a novel catalyst with the effects of large specific surface area, stable structure, sintering resistance, oxidation resistance and stable activity. The catalyst provided by the invention has a chemical component of MgaFebNicSiO4, wherein a is 1.0-1.7, b is 0-0.7 and c is 0.3-0.5. The nickeliferous catalyst taking an olivine structure as a main body is prepared by a hydro-thermal synthesis method; the catalyst has rich hole structures so that the specific surface area and the dispersity of active constituents of the catalyst are effectively improved; meanwhile, the active constituents, such as nickel and iron, and additives substitute for bivalent magnesium to enter an olivine skeletal structure to effectively refrain the phenomenon of oxidation / sintering inactivation of the catalyst, so that the stability and the hydrogen yield of the catalyst in the autothermal reforming process of acetic acid are improved.

The invention relates to a hydrotalcite-like type iron-promoted nickel-based catalyst for hydrogen preparation through autothermal reforming of acetic acid and a preparation method and provides a high-activity novel catalyst resisting oxidation, sintering and carbon deposition to solve the problem that existing catalysts are inactivated due to the structure change as well as oxidation and sintering of active components of the catalysts in the autothermal reforming process of acetic acid. The chemical component of the catalyst is (ZnO)a(NiO)b(AlO1.5)c(FeO1.5)d, wherein a ranges from 0.75 to 3.25, b ranges from 0.25 to 0.75, c ranges from 0 to 1.0 and d ranges from 0 to 1.0. The Zn-Al type carbonate hydrotalcite-like structure is prepared with a co-precipitation method to serve as a precursor, and an active component nickel and an auxiliary iron are introduced and enter the position of the hydrotalcite-like structure through isomorphous substitution of zinc for nickel and isomorphous substitution of aluminum for iron; a compound oxide obtained through sintering effectively inhibits possible migration, accumulation, oxidation and sintering of the active component nickel under the high-temperature reaction condition, and the activity and the stability of the catalyst are improved.

The invention relates to a zinc-nickel-zirconium mesoporous composite oxide catalyst for hydrogen production by autothermal reforming of acetic acid. Directed at the problem that catalyst structure change and the oxidation and sintering of active components can cause catalyst deactivation in existing catalysts during the autothermal reforming reaction of acetic acid, the invention provides a new catalyst characterized by stable structure, sintering resistance, carbon deposition resistance, oxidation resistance, and high activity. The chemical composition of the catalyst is (ZnO)a(NiO)b(ZrO2)c,wherein a is 0.60-2.25, b is 0.40-0.75 and c is 1.00. The invention adopts Ni as the active component, uses ZnO and ZrO2 as the carrier, and adopts coprecipitation method to prepare the Ni / ZnO-ZrO 2composite oxide catalyst, which effectively inhibits the formation of ketene, acetone and other by-products in the reaction process, improves the yield and selectivity of hydrogen, and improves the carbon deposition resistance, sintering resistance and oxidation resistance of the catalyst.

The invention relates to a nickel-based catalyst used for the autothermal reforming of ethanol for producing hydrogen and a preparation method thereof. Aiming at the problems of structural change, oxidation and sintering of active ingredients and deactivation of the conventional catalyst during the autothermal reforming of the ethanol, the invention provides a novel catalyst with a stable structure, sintering resistance, carbon deposit resistance, oxidation resistance and high activity. The chemical formula of the catalyst is NiaMgbAlcXdO4.5+ / -delta, wherein X is an auxiliary agent Fe or Mn, a is 0.25 to 0.40, b is 2.6 to 2.75, c is 0.1 to 0.8 and d is 0.2 to 0.9. A brucite-based (Mg(OH)2.mH2O) hydrotalcite structure is taken as a precursor, so that the active ingredient nickel and the auxiliary agent heteroion component are introduced into a laminated structure and a position between laminated structures; meanwhile, the auxiliary agent iron or magnesium is introduced, so the reducibility and stability of the active ingredients of the catalyst are improved, and the yield of the hydrogen is obviously improved and remains stable.

The invention relates to a nickel-magnesium-chromium mesoporous composite oxide catalyst for auto-thermal reforming of acetic acid to produce hydrogen. The invention aims to solve the problem that inthe prior art, during the acetic acid auto-thermal reforming process, the structure of a conventional catalyst changes, the active components are oxidized and sintered, and thus the catalyst is deactivated, and provides a novel catalyst having the advantages of stable structure, sintering resistance, carbon deposition resistance, oxidation resistance and high activity. The chemical formula of thecatalyst is (NiO)a(MgO)b(CrO1.5)c; wherein a is 0.08-0.12, b is 0.55-0.92, c is 0-0.33, and nickel oxide accounts for 12.0 to 20.0 wt.% of the catalyst, magnesium oxide accounts for 40.0 to 88.0 wt.%of the catalyst, and chromium oxide accounts for 0 to 40.0 wt.% of the catalyst. A catalyst precursor is prepared by a co-precipitation method, chromium is introduced into the catalyst and is taken asan auxiliary agent; after burning, a stable mesoporous composite oxide catalyst, which comprises a MgCr2O4 and NiCr2O4 spinel structure and a Mg-Ni-Cr-O solid solution, is formed; the reducing performance and stability of the active components are enhanced; at the same time, the hydrogen yield of acetic acid auto-thermal reforming, sintering resistant performance, and carbon deposition resistantperformance are all strengthened.

The invention relates to a layered perovskite catalyst for hydrogen generation from acetic acid autothermal reforming and a preparation method. A novel catalyst which is sintering resistant, carbon deposition resistant, antioxidant and high in activity is provided for the problem of catalyst deactivation due to sintering, oxidation and carbon deposition of an existing catalyst in the acetic acid autothermal reforming process. A nickel-based catalyst with an A2BO4 layered perovskite structure is prepared by employing a sol-gel method; and the chemical component is La<2-x>Ca<x>NiO<4>, wherein x is equal to 0-1.5. An oxygen defect and a lattice structure defect of the surface of the perovskite catalyst are increased through replacing lanthanum with a calcium part, and the reducibility, the heat stability and the oxidation resistance of the active component nickel are improved, so that the activity and the stability of the catalyst are improved.