【摘要】 <正> 一、前言 随着核工业的发展,各种核设施不断产生大量的含氚轻水或重水。考虑到工作人员的安全和防止天然水源的污染,必须除去水中的氚。许多学者在这方面作了大量的工作。这里主要介绍铂/聚苯乙烯-二乙烯基苯(Pt/SDB)疏水性催化剂的制备及水/氢间T-H交换实验。更多还原

【Abstract】 This paper presents methods of preparing platinum/polystyrene divinyl benzene (Pt/SDB) hydrophobic catalyst for hydrogen isotopic exchange between water andhydrogen. Specific surface of the support is more than 400m2/g. Two approaches of reduction are used for platinum dispersion and comparison is made with each other. Platinum particles obtained by reduction of hydrazine hydrate are smaller. Particles obtained by reduction of hydrogen are larger and their shapes of boundary are unclear. Dispersion of platinum on the support decreases with increasing the amount of platinum. When the amount of platinum is increased to 4 percent, granules of platinum exist as colony. The T-H catalytic exchange at 30℃, 50℃ and 70℃ has been measured. The activity at 50℃ is the best. Optimum amount of platinum on the SDB is between 0.5% to 1.5%.更多还原