| 改性Pt/HY分子筛催化剂的正庚烷临氢异构化反应性能研究 |
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| 引用本文： | 李芳,孙予罕,彭少逸.改性Pt/HY分子筛催化剂的正庚烷临氢异构化反应性能研究[J].济南大学学报(自然科学版),2003,17(3):258-261. |
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| 作者姓名： | 李芳 孙予罕 彭少逸 |
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| 作者单位： | 1. 济南大学,化学化工学院,山东,济南,250022
2. 中国科学院山西煤炭化学研究所,煤转化国家重点实验室,山西,太原,030001 |
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| 摘 要： | 采用机械混合法，利用ZrO2和WOx／ZrO2对Pt／HY分子筛进行了改性，考察了改性催化剂Pt/Zr—HY和Pt／WZr—HY上的正庚烷临氢异构化反应性能，探讨了改性催化剂影响催化反应活性和异构化选择性的原因。结果表明，改性后的Pt／HY催化剂，在反应活性下降的同时，异构化选择性显著提高，且异构化产物向裂解产物的转化温度明显提高，其中Pt／WZr—HY催化剂的这一效果尤为显著。但改性并不改变反应历程。同时改性也使：HY的酸量明显减少，酸强度改变，造成转化率减少及异构化选择性增大。
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| 关 键 词： | 庚烷临氢异构化 改性HY分子筛 WOx／ZrO2催化剂 |
| 文章编号： | 1671-3559(2003)03-0258-04 |
| 修稿时间： | 2003年5月20日 |
The Stduy of N - heptane Hydroisomerization over Modified- Pt/HY Zeolite Catalysts |
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| LI Fang ,SUN Yu han ,PENG Shao yi.The Stduy of N - heptane Hydroisomerization over Modified- Pt/HY Zeolite Catalysts[J].Journal of Jinan University(Science & Technology),2003,17(3):258-261. |
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| Authors: | LI Fang SUN Yu han PENG Shao yi |
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| Institution: | LI Fang 1,SUN Yu han 2,PENG Shao yi 2 |
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| Abstract: | Pt/HY zeolite was modified by ZrO 2 and WOx/ZrO 2 using physical mixing method,and skeletal hydroisomerization of n-heptane was studied over Pt/HY and so-modified catalysts. The change of conversion and isomerization selectivity due to ZrO 2 and WOx/ZrO 2 modification was then discussed.It was found that the modification resulted in the suppression of n-heptane conversion,but a great increase of selectivity to isomer products.Moreover,the transformation temperature from isomer products to cracking ones was markedly enhanced,especially for Pt/WZr-HY.The modification also decreased the acidity and changed the acid strength,which would affect the isomerization yield.The more the number of acid sites,the higher the isomerization conversion.As a result,n-heptane was converted on three catalysts via the conventional bimolecular reaction mechanism. |
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| Keywords: | n heptane hydroisomerization modified HY zeolite WO X/ZrO 2 catalysts |
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