ZSM-5 crystals grown on the wall of a long tubular reactor as a structured catalyst for cracking of endothermic fuels

详细信息	查看全文 | 推荐本文 |

• 作者：Hui-hui Wu ; Gang Li ; ^{gli@zju.edu.cn}
• 关键词：Ni-based alloy ; ZSM-5 ; Structured catalysts ; Catalytic cracking ; Endothermic fuels
• 刊名：Applied Catalysis A ; General
• 出版年：2012
• 期刊代码：4_0926860x
• 类别：ch
• 出版时间：7 May, 2012
• 卷：423-424
• 期：Complete
• 页码：108-113
• 文件大小：1076 K

摘要

In situ growth of ZSM-5 crystals on the surface of Ni-based alloy supports by hydrothermal synthesis and their mechanical, structural stability were investigated. ZSM-5 crystals grown on the wall of a long (750 mm) tubular reactor with a small inner diameter (1 mm) was evaluated as a structured catalyst for cracking of n-heptane as a model endothermic fuel. The results have shown that the adhesion strength between ZSM-5 crystals and the support was strong enough to resist a heating/fast-cooling cycle (the sample was immersed into water immediately after being heated to be 750 掳C). The crystalline structure of ZSM-5 crystals was also stable against the heating/fast-cooling cycle. The structured catalyst was shown to be catalytically active for cracking of n-heptane (LHSV = 200 h^鈭?) at 700 掳C. The formation rates of gaseous cracking products were 9.8 ml min^鈭? and 29.3 ml min^鈭? for the bare tubular reactor and the tubular reactor with ZSM-5 crystals grown on the wall, respectively. These structured catalysts show high promise for cracking of endothermic fuels at high temperatures.