| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: invention relates to production of catalysts for steam reforming of C1-C4 methane hydrocarbons. Described is a catalyst for steam reforming of C1-C4 methane hydrocarbons, having an active part which contains nickel and aluminium oxides and an aluminium oxide-based support, wherein the active part of the catalyst contains lanthanum oxide, with the following content of components in the catalyst, wt %: nickel oxide 13.0-14.2; aluminium oxide 1.52-1.62; lanthanum oxide 0.25-0.50; support - the balance, and the support additionally contains calcium and potassium oxides, with the following content of components, wt %: aluminium oxide 87.64-91.90; calcium oxide 7.50-10.00; potassium oxide 0.60-2.36. Described is a method of preparing said catalyst, involving saturation of the aluminium oxide-based support with aqueous solutions of nickel and aluminium nitrates, wherein the support is prepared by mixing alumina, aluminium hydroxide, aqueous solutions of basic potassium carbonate and polyvinyl alcohol in the following weight ratio, %: 1:1.625:0.033-0.16:0.02-0.028, respectively, moulding, drying at temperature 100-120C for 2-3 hours, grinding the charge mixture, adding calcium oxide in high-alumina cement, graphite and polyvinyl alcohol in the following weight ratio, %: 1.0:0.19-0.25:0.03-0.04, respectively, and 30.0-38.5% to total weight of the support, packing the charge mixture, pelleting, drying at temperature 110-120C to residual moisture content of not more than 1.0% and calcining at 1500-1550C, then saturating the ready support twice with nickel and aluminium nitrate solutions in the following weight ratio, %: 8-9:1, respectively, and the saturated for the third time with nickel, aluminium and lanthanum nitrate solutions in weight ratio, %: 8-9:1:0.3-0.7, respectively, wherein after each saturation, the catalyst is dried at temperature 110-120C for 3-4 hours and calcined at 380-400C until complete removal of nitrogen oxides. ^ EFFECT: catalyst which exhibits high selectivity during use is obtained. ^ 2 cl, 3 tbl, 13 ex |
