Abstract—

We have studied the effect of surface lamp processing on the hydrogen permeability of membrane foil produced by rolling an ingot of a Pd–Cu solid solution. Such processing has been shown to remove sorption products from the membrane surface and to significantly improve the hydrogen permeability of the membranes at temperatures of up to 300°C. The use of a reactor with a cleaned PdCu membrane allows the hydrogen yield in the methanol steam reforming process in the presence of a Ni_0.2Cu_0.8/Ce_0.3Zr_0.7O_2–δ catalyst to be raised relative to that in a conventional flow reactor owing to the displacement of thermodynamic equilibrium as a result of the removal of hydrogen from the reaction zone. The effect of membrane surface cleaning by lamp processing is most clearly demonstrated by examining the yield of high-purity hydrogen in the permeate zone. Whereas at 360°C the yield of high-purity hydrogen in a reactor containing a membrane with a cleaned surface increased by just 15%, membrane surface cleaning by lamp processing ensured a 15‑fold gain at 260°C. This is due to the considerable difference between the hydrogen permeabilities of the membranes at low temperatures and its gradual decrease at high temperatures.

中文翻译：

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PdCu膜箔表面的灯处理：氢渗透性和膜催化

摘要——

我们研究了表面灯处理对通过轧制 Pd-Cu 固溶体锭生产的膜箔的氢渗透率的影响。这种处理已被证明可以从膜表面去除吸附产物，并在高达 300°C 的温度下显着提高膜的氢渗透性。在 Ni _0.2 Cu _0.8 /Ce _0.3 Zr _0.7 O _2–δ存在的情况下，使用带有清洁 PdCu 膜的反应器可以提高甲醇蒸汽重整过程中的氢气产率由于从反应区除去氢导致热力学平衡的位移，因此相对于传统流动反应器中的催化剂，催化剂的含量要升高。通过检查渗透区中高纯度氢气的产率，可以最清楚地证明灯处理对膜表面的清洁效果。在 360°C 时，含有表面清洁的膜的反应器中高纯度氢气的产率仅增加了 15%，而通过灯处理对膜表面进行清洁可确保在 260°C 时提高 15 倍。这是由于膜在低温下的氢渗透率与其在高温下逐渐降低之间的显着差异。