Hydroisomerization of n-hexadecane on zeolite catalysts
文献类型：期刊论文
| 作者 | Huang, WG; Li, DD; Shi, YH; Kang, XH; Meng, XB; Wang, K; Dong, WZ; Nie, H; Li, C |
| 刊名 | chinese journal of catalysis
 |
| 出版日期 | 2003-09-01 |
| 卷号 | 24期号:9页码:651-657 |
| 关键词 | platinum zeolite alumina n-hexadecane hydroisomerization reaction mechanism |
| 英文摘要 | hydroisomerization of n-hexadecane on zeolite catalysts was studied and the reaction mechanism was discussed, which may provide new clues to developing hydroisomerization catalysts with high selectivity. the catalysts were prepared as follows: zeolite and alumina were mixed and then extruded to make a support, after drying and calcination, platinum was loaded on by wet impregnation with pt(nh3)(4)cl-2 solution. the hydroisomerization of n-hexadecane was carried out in a continuous fixed-bed reactor with down-flow. the catalysts were loaded in the reactor and reduced for 4 h. then n-hexadecane was pumped into the reactor at different temperatures. the reaction results indicated that pt/mcm-22 and pt/zsm-5 catalysts show higher activity but lower selectivity than pt/hbeta and pt/sapo-11 catalysts. the selectivity of pt/sapo-11 is the highest, more than 90% at the conversion of 80%. from the cracked product distribution, it could be seen that, for pt/zsm-5 and pt/hbeta, the fractions of small molecule products, such as c-3, c-4 and c-5, are more than those of long chain products, but for pt/sapo-11, the cracked product distribution is nearly symmetrical, which means that there is secondary cracking occurred for pt/zsm-5 and pt/hbeta but no for pt/sapo-11. the symmetrical distribution of cracked products is the characteristics of large-pore zeolites or amorphous catalysts, so it can be concluded that the hydroisomerization takes place on the external surface or at the pore mouth of sapo-11, but not in the pore channel. the different zeolites showed different behavior for the isomerization, which can be attributed to their different acidity. the strong acidity of mcm-22 and zsm-5 leads to poor isomerization selectivity. sapo-11 has high selectivity, indicating that the weak and mild acids are favorable to the isomerization. |
| WOS标题词 | science & technology ; physical sciences ; technology |
| 类目[WOS] | chemistry, applied ; chemistry, physical ; engineering, chemical |
| 研究领域[WOS] | chemistry ; engineering |
| 关键词[WOS] | aluminophosphate molecular-sieves ; key-lock catalysis ; pore mouth ; ton-type ; hydrocracking ; hydroconversion ; alkanes ; acidity ; decane ; isomerization |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000185982100005 |
| 公开日期 | 2015-11-10 |
| 源URL | [http://159.226.238.44/handle/321008/138220]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | 1.SINOPEC, Res Inst Petr Proc, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Huang, WG,Li, DD,Shi, YH,et al. Hydroisomerization of n-hexadecane on zeolite catalysts[J]. chinese journal of catalysis,2003,24(9):651-657. |
| APA | Huang, WG.,Li, DD.,Shi, YH.,Kang, XH.,Meng, XB.,...&Li, C.(2003).Hydroisomerization of n-hexadecane on zeolite catalysts.chinese journal of catalysis,24(9),651-657. |
| MLA | Huang, WG,et al."Hydroisomerization of n-hexadecane on zeolite catalysts".chinese journal of catalysis 24.9(2003):651-657. |
入库方式： OAI收割
来源：大连化学物理研究所
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