Preparation and evaluation of nickel based catalysts for full hydrogenation of C4 mixtures
A nickel based catalyst for the full hy-drogenation of C4 mixtures was prepared by using co-precipitation method and extrusion molding pro-cess in a small scale trial.The effects of hydrogena-tion process conditions such as reaction pressure,volume space velocity,and hydrogen to hydrocarbon volume ratio on catalyst performance were investi-gated.The catalyst was prepared in a pilot scale by using a pressure molding process and its hydrogena-tion performance was evaluated.The results showed that under the optimized hydrogenation process con-ditions of inlet temperature at room temperature,re-action pressure of 2.0 MPa,hydrogen to hydrocarbon volume ratio of 300,and feed volume space velocity of 2.0 h-1,the small scale catalysts could reduce the mass fraction of single olefins in the mixed C4 feed-stock to below 1.0%.Compared with small scale cat-alysts,the bulk density and radial compressive cracking force of the pilot scale catalysts increased by 73%and 302%,respectively.The unsaturated hydrocarbon conversion rates of the pilot scale cata-lysts and imported palladium based catalysts during the 789 h evaluation cycle were 94.26%and 89.72%,respectively.The pilot scale catalysts had better low temperature hydrogenation activity and excellent hy-drogenation stability than the imported palladium based catalysts.
C4 mixturesfull hydrogenationpilot scale-upnickel based catalystpalladium based cat-alystconversion rate
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维普
