Combined synthesis and hydroprocessing on a cobalt catalyst on a cobalt-containing zeolite catalyst
https://doi.org/10.20914/2310-1202-2018-4-304-311
Abstract
A composite Co-Al2O3/SiO2/HZSM-5 catalyst has been developed for one-step synthesis of fuel series hydrocarbons from CO and H2. The catalyst was obtained by mixing and forming powders with a Co-Al2O3/SiO2 catalyst, zeolite HZSM-5, and boehmite Al(O)OH?H2O. The physicochemical methods XRD, PEM, BET established the phase composition of the catalyst, the particle size of cobalt (8.2 ± 1 nm), its specific surface area (286 m2/g). Tests were carried out in the synthesis of hydrocarbons from CO and H2 for 60 hours at a temperature of 240 ° C, a pressure of 2.0 MPa, and a gas flow rate of 1000 h-1. It is shown that synthesis gas diluted by 40% with nitrogen can produce liquid C5+ hydrocarbons with a selectivity of 69% and a productivity of 81 kg/(m3?h). The yield of С5+ hydrocarbons was 70 g/m3 of the leaked synthesis gas and 135 g/m3 of the converted synthesis gas. Synthetic oil has a molecular mass distribution close to monomodal (the probability of chain growth is 0.81), 88% consists of gasoline and diesel fractions and 12% of long-chain C19+ hydrocarbons. The ratio of isomeric hydrocarbons to normal hydrocarbons (iso/n) is 1,26, and the ratio of olefinic hydrocarbons to paraffinic hydrocarbons is 0,97. In the gasoline fraction of hydrocarbons (C5-C10), a high content of alkenes of normal and branched structure (76,3%) is noted, the proportion of iso-alkanes and n-alkanes is 10,8 and 12,9%, respectively. The catalyst showed stable operation, the rate of its deactivation is comparable to the rate of deactivation of a commercial bifunctional catalyst.
About the Authors
R. E. Yakovenko
Platov South-Russian State Polytechnic University (NPI)
Russian Federation
Cand. Sci. (Engin.), associate professor, department of chemical technology, Prosveshceniya St. 132, Rostov region, Novocherkassk, 346428 Russia
Russian Federation
Cand. Sci. (Engin.), associate professor, department of chemical technology, Prosveshceniya St. 132, Rostov region, Novocherkassk, 346428 Russia
I. N. Zubkov
Platov South-Russian State Polytechnic University (NPI)
graduate student, department of chemical technology, Prosveshceniya St. 132, Rostov region, Novocherkassk, 346428 Russia
graduate student, department of chemical technology, Prosveshceniya St. 132, Rostov region, Novocherkassk, 346428 Russia
S. V. Nekroenko
Platov South-Russian State Polytechnic University (NPI)
research assistant, Research Institute “Nanotechnology and new materials”, Prosveshceniya St. 132, Rostov region, Novocherkassk, 346428 Russia
research assistant, Research Institute “Nanotechnology and new materials”, Prosveshceniya St. 132, Rostov region, Novocherkassk, 346428 Russia
O. P. Papeta
Platov South-Russian State Polytechnic University (NPI)
student, department of chemical technology, Prosveshceniya St. 132, Rostov region, Novocherkassk, 346428 Russia
student, department of chemical technology, Prosveshceniya St. 132, Rostov region, Novocherkassk, 346428 Russia
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Review
For citations:
Yakovenko R.E., Zubkov I.N., Nekroenko S.V., Papeta O.P. Combined synthesis and hydroprocessing on a cobalt catalyst on a cobalt-containing zeolite catalyst. Proceedings of the Voronezh State University of Engineering Technologies. 2018;80(4):304-311. (In Russ.) https://doi.org/10.20914/2310-1202-2018-4-304-311
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