The pure and palladium doped 12-tungstophosphoric acid - H₃PW₁₂O₄₀ (HPW) and its cesium salts Cs_xH_3-xPW₁₂O₄₀ (x = 1, 2, 2.25 and 2.5) were prepared and characterized by thermal analysis, FTIR, XRD, BET and XPS methods. In this paper were determined the optimal reaction temperature and the effect of palladium on the coke content during the dehydration of ethanol in the temperature range of 200−350 °C. Above 300 °C, a strong deactivation of the catalysts was caused by coke formation. The catalytic tests demonstrate that by supporting the HPW and Pd_yPW (y = 0.15, 0.2 and 0.25) on mesoporous molecular sieve SBA-15 the catalytic activity in ethanol dehydration reaction was improved. Palladium doping of HPW/SBA-15 significantly decreases the formation of coke deposit. The formation of coke during the ethanol dehydration does not affect the Keggin structure which led us to conclude that such catalysts can be regenerated in air and regain their catalytic activity for a short time.

制备了纯钯掺杂的12钨磷酸-H ₃ PW ₁₂ O ₄₀（HPW）及其铯盐Cs _x H _3-x PW ₁₂ O ₄₀（x = 1，2，2.25和2.5），并对其进行了热表征。分析，FTIR，XRD，BET和XPS方法。本文确定了在200-350°C的温度下乙醇脱水过程中的最佳反应温度和钯对焦炭含量的影响。高于300℃，由于焦炭的形成而使催化剂强烈失活。催化测试表明，通过支持HPW和Pd _y在介孔分子筛SBA-15上PW（y = 0.15、0.2和0.25）提高了乙醇脱水反应的催化活性。HPW / SBA-15的钯掺杂显着减少了焦炭沉积的形成。乙醇脱水过程中焦炭的形成不会影响Keggin结构，这使我们得出结论，这种催化剂可以在空气中再生并在短时间内恢复其催化活性。