Highly-selective solvent-free catalytic isomerization of α-pinene to camphene over reusable titanate nanotubes.
Highly-selective solvent-free catalytic isomerization of α-pinene to camphene over reusable titanate nanotubes.
复制标题
在可重复使用的钛酸酯纳米管上，α-蒎烯高度选择性无溶剂催化异构化为莰烯
作者：
采用水热重构法制备了钛纳米管，并对其进行了盐酸改性，在无溶剂条件下考察了钛纳米管作为固体酸催化剂对α-蒎烯异构化反应的催化性能。结果表明，钛酸盐纳米管比二氧化钛纳米粒子具有更好的催化性能，α-蒎烯异构化反应的主要产物为异松烯。考察了反应温度、催化剂用量、反应时间等因素对α-蒎烯转化率和α-蒎烯选择性的影响。在温和的反应条件下，催化剂的最高转化率可达97.8%，对异丙苯的选择性为78.5%，且催化剂经4次重复使用后仍具有良好的重复使用性能。认为钛酸盐纳米管材料具有良好的催化性能主要是由于其表面具有合适的酸性位和开放的纳米管结构。采用水热重构法制备了二氧化钛纳米管，并对其进行了盐酸后修饰，研究了其对α-蒎烯异构化反应的催化性能，结果表明，二氧化钛纳米管对α-蒎烯异构化反应具有较高的选择性。
Titanate nanotubes, prepared by the hydrothermal reconstitution and modification with hydrochloric acid, were tested as solid acid catalysts in the isomerization of α-pinene under solvent free conditions. The results showed that titanate nanotubes have better catalytic properties than titanium dioxide nanoparticles, and the camphene was the main product for α-pinene isomerization. The effects of several reaction variables, such as reaction temperature, catalyst dosage, and reaction time, on the conversion of α-pinene and the selectivity to camphene were examined. The highest conversion was up to 97.8% with selectivity to camphene of 78.5% under the mild reaction conditions, and the catalyst also showed outstanding reusability after four runs. It is proposed that appropriate surface acidic sites and opened nanotubular structures are mainly responsible for the excellent catalytic performance of titanate nanotubes materials. Titanate nanotubes prepared by hydrothermal reconstitution and post-modification with HCl aqueous solution were studied in α-pinene isomerization showing high selectivity to camphene.
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DOI：
10.1016/j.jiec.2012.07.024
发表时间：
2013-01-25
影响因子：
6.1
作者：
Akgul, Murat;Ozyagci, Bensu;Karabakan, Abdulkerim
通讯作者：
Karabakan, Abdulkerim
影响因子：
5.2
作者：
Luque, Rafael;Manuel Campelo, Juan;Angel Romero, Antonio
通讯作者：
Angel Romero, Antonio
影响因子：
2.1
作者：
Hosseini-Sarvari, Mona
通讯作者：
Hosseini-Sarvari, Mona
影响因子：
2.8
作者：
Anandgaonker, Priyanka L.;Jadhav, Sunita;Rajbhoj, Anjali S.
通讯作者：
Rajbhoj, Anjali S.
影响因子：
2.8
作者：
Sidhpuria, Kalpesh B.;Tyagi, Beena;Jasra, Raksh V.
通讯作者：
Jasra, Raksh V.