STUDY IN NEW DEHYDROGENATION USING A HYDROGEN-PERMEABLE MEMBRANE REACTOR

使用透氢膜反应器进行新型脱氢的研究

• 批准号: 02650594
• 负责人: KIKUCHI Eiichi
• 金额: $ 1.02万
• 依托单位: Waseda University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02650594/
• 关键词: Palladium; Inorganic Membrane; Membrane Reactor; Hydrogen; Dehydrogenation; Dehydroaromatization; Propane; Isobutane; メンブレンリアクタ-; イソブチレン; 複合膜; エチルベンゼン

The dehydrogenation of isobutane to isobutene was conducted in a comparatively low temperature range between 623 and 723K using a hydrogen permeable membrane reactor. Al_2O_3-supported Pt catalyst exhibited high activity compared with a commercial Cr_2O_3-Al_2O_3 catalyst in a conventional flow reactor. In the membrane reactor, however, the Pt catalyst gave a lower yield of isobutene than the Cr_2O_3-Al_2O_3 catalyst, although the isobutene yields on both of these catalysts were high compared with thermodynamic equilibrium ones attainable in a conventional reactor, due to the shift of equilibrium toward the product side. It was shown that the Pt catalyst was more rapidly deteriorated in the membrane reactor, due to deposition of carbonaceous matters. On the other hand, undesirable side reactions such as hydroisomerization and hydrogenolysis were suppressed in the membrane reactor due to the removal of produced hydrogen from the reaction side, leading to high selectivity for isobutene. The addition of Sn to Pt/Al_2O_3 was effective to enhance the catalytic activity for dehydrogenation in the membrane reactor.

使用氢渗透膜反应器在623至723K之间的相对较低的温度范围内进行异丁烷脱氢为异丁烯。与商业Cr_2O_3-Al_2O_3催化剂相比，Al_2O_3负载的Pt催化剂在常规流动反应器中表现出较高的活性。然而，在膜反应器中，Pt催化剂产生的异丁烯收率低于Cr_2O_3-Al_2O_3催化剂，尽管这两种催化剂的异丁烯收率与传统反应器中可达到的热力学平衡收率相比较高，这是由于Pt催化剂的异丁烯收率发生了变化。平衡向产品侧倾斜。结果表明，由于碳质物质的沉积，Pt 催化剂在膜反应器中劣化得更快。另一方面，由于从反应侧去除了产生的氢气，在膜反应器中抑制了不希望的副反应，例如加氢异构化和氢解，从而实现了异丁烯的高选择性。在Pt/Al_2O_3中添加Sn可有效提高膜反应器中脱氢的催化活性。

项目成果

Takeshi Matsuda: "Dehydrogenation of Isobutane to Isobutene in Palladium Membrane Reactor" Applied Catalysis in press.

Takeshi Matsuda：“异丁烷在钯膜反应器中脱氢为异丁烯”应用催化已出版。

菊地 英一: "パラジウムの水素選択透過を利用したメンブレンリアクタ-" ケミカル・エンジニヤリング. 287-291 (1990)

Eiichi Kikuchi：“使用氢选择性渗透钯的膜反应器”化学工程287-291（1990）。

Eiichi Kikuchi: "Hydrogen Permeable Palladiumーsilver Alloy Membrane Supported on Porous Ceramics" Journal of Membrane Science. 56. 315-325 (1991)

Eiichi Kikuchi：“多孔陶瓷支撑的透氢钯银合金膜”膜科学杂志 56. 315-325 (1991)。

Shigeyuki Uemiya: "Promotion of the Conversion of Propane to Aromatics by Use of a Palladium Membrane" Applied Catalysis. 76. 171-181 (1991)

Shigeyuki Uemiya：“利用钯膜促进丙烷转化为芳烃”应用催化。

Eiichi Kikuchi: "Steam Reforming of Methane in a Hydrogen-Permeable Membrane Reactor" Applied Catalysis. 76. 223-230 (1991)

Eiichi Kikuchi：“透氢膜反应器中甲烷的蒸汽重整”应用催化。