Acid properties of silica-alumina catalysts and catalytic degradation of polyethylene
| Autor: | Reikichi Nakayama, Noriyoshi Kakuta, Hiroshi Katoh, Ryuji Nishiyama, Hideo Sunazuka, Takashi Kuroyanagi, Susumu Tanifuji, Hironobu Ohkita, Akifumi Ueno, Yukihiko Namiki, Takanori Mizushima, Yoshihisa Tochihara, Yoshio Morioka |
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| Rok vydání: | 1993 |
| Předmět: |
Aluminium oxides
Wax General Chemical Engineering Inorganic chemistry chemistry.chemical_element Fraction (chemistry) General Chemistry Polyethylene Decomposition Industrial and Manufacturing Engineering Catalysis chemistry.chemical_compound chemistry Chemical engineering visual_art visual_art.visual_art_medium Lewis acids and bases Carbon |
| Zdroj: | Industrial & Engineering Chemistry Research. 32:3112-3116 |
| ISSN: | 1520-5045 0888-5885 |
| Popis: | A relationship between the acid strengths and amounts of silica-alumina catalysts and the compositions of products formed by the catalytic degradation of polyethylene at 673 K was studied. The acid strengths and amounts were varied with SiO{sub 2}/Al{sub 2}O{sub 3} weight ratio in the catalysts. Although the resulting products and amounts were varied with SiO{sub 2}/Al{sub 2}O{sub 3} weight ratio in the catalysts. Although the resulting products consisted of gases, oils, and wax, the fraction of gases increased, and, inversely, the fraction of oils decreased, as the acid amounts over the catalysts increased. The fraction of aromatics in the oils was enhanced, however, as the acid amounts over the catalysis increased, which was discussed in terms of the acid types: Broensted and Lewis acids generated on silica-aluminas. Since some inorganic compounds such as MgO, ZnO, TiO{sub 2}, and carbon are incorporated into plastics, the catalytic activities and selectivities of these additives for polyethylene degradation were also discussed. |
| Databáze: | OpenAIRE |
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