Beneficial roles of H-donors as diluent and H-shuttle for asphaltenes in catalytic upgrading of vacuum residue
| Autor: | Yong-Kul Lee, Hwankyu Lee, Sung-Ho Kim, Ki-Duk Kim |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
General Chemical Engineering
02 engineering and technology General Chemistry Coke 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Diluent Industrial and Manufacturing Engineering 0104 chemical sciences Catalysis chemistry.chemical_compound chemistry Decalin Chemical engineering Environmental Chemistry Organic chemistry Tetralin Solubility 0210 nano-technology Asphaltene Naphthalene |
| Zdroj: | Chemical Engineering Journal. 314:1-10 |
| ISSN: | 1385-8947 |
| Popis: | The effects of various organic solvents having different H-donor index, asphaltene solubility, and alkyl-substitution on the upgrading of vacuum residue (VR) were investigated under thermal cracking or catalytic hydrocracking conditions at 673 K and 10.0 MPa N2 or H2. Molecular dynamics simulations were also adopted to verify physical interaction between asphaltene species with H-donor solvents. Thermal cracking led to a considerable amount of coke formation, close to 29.8 wt.%, but the addition of H-donors reduced the coke formation down to 23.4, 19.0, 12.4, and 4.1 wt.% in the presence of naphthalene, 1-methyl naphthalene(1-MN), decalin, and tetralin, respectively. The coke formation was considerably reduced to 7.2 wt.% in the hydrocracking condition, and further down to 2.9 and 1.2 wt.% in the presence of naphthalene and tetralin, respectively. It was demonstrated that H-donors retaining the H transfer capability coupled with the solubility of asphaltene contributed to the marked performance of VR hydrocracking in the presence of dispersed MoS2 catalyst. |
| Databáze: | OpenAIRE |
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