Using a hydrogen-permeable palladium membrane electrode to produce hydrogen from water and hydrogenate toluene
Using a hydrogen-permeable palladium membrane electrode to produce hydrogen from water and hydrogenate toluene
复制标题
DOI：
10.1016/j.ijhydene.2016.01.151
复制
发表时间：
2016-04
影响因子：
7.2
通讯作者：
Takafumi Sato;Shuhei Sato;N. Itoh
中科院分区：
文献类型：
--
作者：
Takafumi Sato;Shuhei Sato;N. Itoh
以透氢Pd-Ag膜为阴极，利用电解氢氧化钾产生的渗透纯氢气进行制氢和甲苯加氢反应。对于制氢，由于钯膜的氢气渗透性增加，渗透侧的氢流量随着温度的升高而增加。施加于电解侧的压力从0.1℃增加到0.8℃，通过减少气泡形成的影响，提高了产氢量和氢透过膜的能力，并在373K时获得了高达93%的氢渗透率，无论产生多少氢气。甲苯在5wt%的Pt/Al_2O_3催化剂上加氢，在电解侧加压0.8℃时，甲基环己烷的转化率随接触时间的增加而增加，在393K时转化率可达95%。该电解系统对生产纯氢和芳烃加氢合成化学氢化物是有效的。
Hydrogen production and toluene hydrogenation were performed with a hydrogen-permeable Pd–Ag membrane as a cathode by using permeated pure hydrogen produced from the electrolysis of aqueous potassium hydroxide. For hydrogen production, the hydrogen flow rate on the permeation side increased with temperature because of the increased hydrogen permeability of the palladium membrane. The increase in pressure applied to the electrolysis side from 0.1 MPa to 0.8 MPa enhanced hydrogen production and hydrogen permeation through the membrane by reducing the effects of bubble formation, and achieved a high hydrogen permeation yield of 93% at 373 K regardless of the amount of hydrogen produced. Hydrogenation of toluene with 5 wt% Pt/Al2O3and with 0.8 MPa of pressure applied to the electrolysis side yielded methylcyclohexane as a product, and the conversion increased to 95% at 393 K with increasing contact time. This electrolysis system is effective for producing pure hydrogen and for hydrogenating aromatics to synthesize chemical hydrides.