CAJ | 학술논문

在硝酸体系中，以铂黑为催化剂、肼为还原剂，在反应液初始铀酰浓度0．9 mol/L、初始肼浓度1．0 mol/L、初始硝酸浓度0．8 mol/L、铂黑用量（以反应液计）8×10-3 g/mL的工艺条件下，根据体系中各反应的化学方程式推导出了单位体积物质的理论反应热计算公式，并计算出了反应时间在0．5-4 h过程中的理论反应热，同时通过自行设计的测量肼催化还原U（Ⅵ）制备U（Ⅳ）的反应热装置测量相同工艺条件下，40，50℃时不同时刻的反应温差，计算得到了肼催化还原U（Ⅵ）制备U（Ⅳ）的实际反应热，最后与计算的理论反应热进行对比，结果表明，在1 h内实验值与计算值基本吻合。
재초산체계중，이박흑위최화제、정위환원제，재반응액초시유선농도0．9 mol/L、초시정농도1．0 mol/L、초시초산농도0．8 mol/L、박흑용량（이반응액계）8×10-3 g/mL적공예조건하，근거체계중각반응적화학방정식추도출료단위체적물질적이론반응열계산공식，병계산출료반응시간재0．5-4 h과정중적이론반응열，동시통과자행설계적측량정최화환원U（Ⅵ）제비U（Ⅳ）적반응열장치측량상동공예조건하，40，50℃시불동시각적반응온차，계산득도료정최화환원U（Ⅵ）제비U（Ⅳ）적실제반응열，최후여계산적이론반응열진행대비，결과표명，재1 h내실험치여계산치기본문합。
Under the conditions of initial U(VI)concentration 0.9 m/L,hydrazine 1 .0 m/L ,nitrate 0.8 m/L and Pt dosage 8 ×10 -3 g/mL(as reaction liquid)in the nitrate media with Pt as catalyst and hydrazine as reduction,the theory reaction heat formula for unit volume was obtained according to the reaction equations in the system.On that basis,the theory reaction heat was got when the reaction time was from 0.5 h to 4 h.The difference of temperature was achieved in the same technological condition at the different time when the temperatures were 40,50 ℃by the self-designed device.The actual heat of reaction was calculated compared with theory reaction heat.The result shows that the theoretical value and practical value agree well within 1 h.