Abstract:
The present disclosure relates to oriented photocatalytic semiconductor surfaces which may include photocatalytic capped colloidal nanocrystals (PCCNs) positioned all in the same orientation. The photoactive material may be employed in a plurality of photocatalytic energy conversion applications such as the photocatalytic reduction of carbon dioxide and water splitting, among others. The disclosed oriented PCCNs, within the oriented photoactive material, may also exhibit different shapes and sizes, and higher efficiency in a light harvesting process. Having all the PCCNs oriented at the same angle and dipole moment may allow the light to interact with the dipole at an increased efficiency, to predict the polarity of the light or a more efficient interaction with the nanocrystals substrate, and therefore, increasing the harvesting efficiency by controlling different parts of the light spectrum in the same system.
Abstract:
A system and method employing sunlight energy for the reduction of carbon dioxide into methane and water are disclosed. Methane gas may then be stored for later use as fuel. The system and method may use inorganic capping agents that cap the surface of semiconductor nanocrystals to form photocatalytic capped colloidal nanocrystals, which may be deposited on a substrate and treated to form a photoactive material. The photoactive material may be employed in the system to harvest sunlight and produce energy necessary for carbon dioxide reduction. The system may also include elements necessary to collect and transfer methane, for subsequent transformation into electrical energy.
Abstract:
The invention relates to a self-supported mixed metal sulfide (MMS) catalyst for hydrotreating hydrocarbon feedstock and to a method for preparing the catalyst. The MMS catalyst is characterized as having a BET surface area of at least 20 m2/g and a pore volume of at least 0.05 cm3/g. In one embodiment, the MMS catalyst is also characterized as having a multi-phased structure comprising five phases: a molybdenum sulfide phase, a tungsten sulfide phase, a molybdenum tungsten sulfide phase, an active nickel phase, and a nickel sulfide phase.
Abstract:
A self-supported mixed metal sulfide (MMS) catalyst for hydrotreating hydrocarbon feedstock is disclosed. The self-supported MMS catalyst is characterized by an HDN reaction rate constant of at least 100 g feed hr−1 g catalyst−1 assuming first order kinetics, and an HDS reaction rate constant of at least 550 g feed hr−1 g catalyst−1 assuming first order kinetics in hydrotreating of a Heavy Coker Gas Oil as a feedstock with properties indicated in Table A and at given process conditions as indicated in Table E. In one embodiment, the catalyst is characterized as having a multi-phased structure comprising five phases: a molybdenum sulfide phase, a tungsten sulfide phase, a molybdenum tungsten sulfide phase, an active nickel phase, and a nickel sulfide phase.
Abstract translation:公开了一种用于加氢处理烃原料的自支撑混合金属硫化物(MMS)催化剂。 自支撑的MMS催化剂的特征在于以假定一级动力学为至少100g进料hr-1g催化剂-1的HDN反应速率常数,以及至少550g进料hr-1g催化剂-1的HDS反应速率常数, 假设在重型Coker Gas Oil作为原料的加氢处理中的一级动力学作为原料,具有表A所示的性质和表E所示的给定工艺条件。在一个实施方案中,催化剂的特征在于具有多相结构,其包含五 相:硫化钼相,硫化钨相,硫化钨相,活性镍相和硫化镍相。
Abstract:
A hydroprocessing bulk catalyst is provided. A process to prepare hydroprocessing bulk catalysts is also provided. The hydroprocessing catalyst has the formula (Rp)i(Mt)a(Lu)b(Sv)d(Cw)e(Hx)f(Oy)g(Nz)h, wherein M is at least at least a “d” block element metal; L is also at least a “d” block element metal, but different from M; t, u, v, w, x, y, z representing the total charge for each of the components (M, L, S, C, H, O and N, respectively); R is optional and in one embodiment, R is a lanthanoid element metal; 0
Abstract translation:提供加氢处理体积催化剂。 还提供了制备加氢处理大量催化剂的方法。 加氢处理催化剂具有式(Rp)i(Mt)a(Lu)b(Sv)d(Cw)e(Hx)f(Oy)g(Nz)h,其中M至少至少为块状元素金属 ; L也至少是一个D块元素金属,但不同于M; 表示各组分(M,L,S,C,H,O和N分别)的总电荷的t,u,v,w,x,y,z; R是任选的,在一个实施方案中,R是镧系元素金属; 0 <= i <= 1; pi + ta + ub + vd + we + xf + yg + zh = 0; 0
Abstract:
The present provides a high-efficiency amide compound production catalyst to be used in producing an amide compound through hydration of a nitrile compound and a production method using it. The amide compound production catalyst is for producing an amide compound through reaction of a nitrile compound and water, and comprises a manganese oxide catalyst containing bismuth and further containing yttrium or vanadium. The method for producing an amide compound comprises reacting a nitrile compound and water in a liquid phase in the presence of the amide compound production catalyst.
Abstract:
A hydroprocessing bulk catalyst is provided. A process to prepare hydroprocessing bulk catalysts is also provided. The hydroprocessing catalyst has the formula (RP)i(Mt)a(Lu)b(Sv)d(Cw)e(Hx)f(Oy)g(Nz)h, wherein M is at least at least a “d” block element metal; L is also at least a “d” block element metal, but different from M; t, u, v, w, x, y, z representing the total charge for each of the components (M, L, S, C, H, O and N, respectively); R is optional and in one embodiment, R is a lanthanoid element metal; 0
Abstract translation:提供加氢处理体积催化剂。 还提供了制备加氢处理大量催化剂的方法。 加氢处理催化剂具有式(RP)i(Mt)a(Lu)b(Sv)d(Cw)e(Hx)f(Oy)g(Nz)h,其中M至少为“d” 块元素金属; L也是至少一个“d”块元素金属,但不同于M; 表示各组分(M,L,S,C,H,O和N分别)的总电荷的t,u,v,w,x,y,z; R是任选的,在一个实施方案中,R是镧系元素金属; 0 <= i <= 1; pi + ta + ub + vd + we + xf + yg + zh = 0; 0
Abstract:
A process for catalytically oxidizing H2S contained in a gas directly to sulphur containing the following steps: combining the H2S-containing gas with a gas containing free oxygen in an amount to produce an oxygen-enriched H2S-containing gas having O2/H2S molar ratio ranging from about 0.05 to about 15; and contacting the oxygen-enriched H2S-containing gas with a catalyst for selective oxidation of H2S to sulphur, wherein the catalyst includes a catalytically active phase combined with a silicon carbide-based support and wherein the active phase of the catalyst consists of at least one oxysulphide of at least one metal selected from the group consisting of iron, copper, nickel, cobalt, chromium, molybdenum and tungsten, at a temperature above the dew point of sulphur formed during H2S oxidation.
Abstract:
The invention concerns a catalyst for hydrorefining and hydroconverting hydrocarbon feeds, comprising a mixed sulphide comprising at least two elements selected from elements with an atomic number selected from the group formed by the following numbers: 3, 11, 12, 19 to 33, 37, to 51, 55 to 83, 87 to 103, characterized in that the mixed sulphide results from a combination of at least one element the sulphide of which has a bond energy between the metal and sulphur of less than 50.+-.3 kcal/mol (209.+-.12 kJ/mol) and at least one element the sulphide of which has a bond energy between the metal and sulphur of more than 50.+-.3 kcal/mol (209.+-.12 kJ/mol), the mixed sulphide thus having a mean bond energy between the metal and sulphur which is in the range 30 to 70 kcal/mol (125 to 293 kJ/mol).