From nano-to macro-engineering of LDHs-derived nanocomposite catalysts for harsh reactions
From nano-to macro-engineering of LDHs-derived nanocomposite catalysts for harsh reactions
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用于严酷反应的 LDH 衍生纳米复合催化剂的从纳米到宏观工程
DOI：
10.1016/j.ijhydene.2017.09.105
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发表时间：
2017-11
影响因子：
7.2
通讯作者：
Lu Yong
中科院分区：
文献类型：
--
作者：
Chai Ruijuan;Zhang Zhiqiang;Chen Pengjing;Pan Xiaxia;Zhao Guofeng;Liu Ye;Lu Yong
报道了一种简单的策略，通过Al 2 O3/水界面辅助方法将LDHs嵌入到整体基底（例如使用22 μm FeCrAl纤维或20 μm不锈钢纤维和SiC泡沫的薄毡微纤维结构）上，然后煅烧将LDHs转化为纳米复合材料，一步从纳米尺度到宏观尺度工程化LDHs衍生的纳米复合材料催化剂。这种方法实现了催化组分的可调谐性和均匀分布、增强的热/质传递、自支撑特征和高渗透性的独特集成，从而在苛刻反应中显示出巨大的应用潜力。例如，衍生自NiMgAl-LDHs/Al 2 O3/FeCrAl-纤维的薄毡状NiO单键MgO单键Al 2 O3/FeCrAl-纤维催化剂为高通量和放热催化氧-甲烷重整提供了高活性和稳定性：在700 °C下，使用72 L g−1h−1的高气时空速，在300 h测试内，甲烷转化率为87-90%，H2/CO选择性为91-93/90-92%。
A facile strategy is reported for engineering layered double hydroxides (LDHs)-derived nanocomposite catalysts from nano-to macro-scales in one step, via the Al2O3/water interface-assisted method to embed LDHs onto monolithic substrates (such as thin-felt microfibrous structure using 22 μm FeCrAl fibers or 20 μm stainless steel fibers and SiC foam) followed by calcination to transform LDHs to nanocomposites. Such approach achieves unique integration of tunability and homogeneous distribution of catalytic components, enhanced heat/mass-transfer, self-supported feature, and high permeability, thus exhibiting tremendous potential for application in harsh reactions. For example, the thin-felt NiOsingle bondMgOsingle bondAl2O3/FeCrAl-fiber catalyst derived from NiMgAl-LDHs/Al2O3/FeCrAl-fiber offers high activity and stability for the high throughput and exothermic catalytic oxy-methane reforming: 87–90% methane conversion and 91–93/90–92% H2/CO selectivities at 700 °C within 300 h testing, using a high gas hourly space velocity of 72 L g−1h−1.
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影响因子：
7.2
作者：
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通讯作者：
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影响因子：
5.5
作者：
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影响因子：
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作者：
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通讯作者：
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作者：
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通讯作者：
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影响因子：
7.2
作者：
Wei Chen;Wenqie Sheng;Fahai Cao;Yong Lu
通讯作者：
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