钌催化剂存在下的氨湿法氧化反应条件与N_2选择性

WET AIR OXIDATION OF AMMONIA OVER RUTHENIUM CATALYST The Reaction Conditions and the N_2 Selectivity

在完全除去铵离子的湿法氧化反应中，一种钌催化剂能够将文献报道的反应条件从５４３Ｋ，７－０ ＭＰａ 缓和为４５３ Ｋ，３－０ ＭＰａ． 但是，在相对温和的反应条件下， Ｎ２ 选择性不够理想，并受到操作条件如ｐＨ、反应温度、空填充压力及催化剂用量等的影响． 在所试验的条件范围内， Ｎ２ 选择性在８５－６ ％ ～９８－１ ％ 间变化，而氨转化率却接近１００％ ． 对Ｎ２ 选择性和反应条件之间的关系进行了讨论，并通过正交试验找到了一个最佳反应条件，从而在温和的反应条件下， 使氨的氧化能够有效地向着生成Ｎ２ 的方向进行．

For complete removal of NH + 4 (82 7 mmol/L) through the wet air oxidation (WAO) process, a Ru catalyst enabled to ease the reaction conditions from 543 K, 7 0 MPa to 453 K, 3 0 MPa. However, under the mild reaction condition, N 2 selectivity was somewhat undesired, and was largely affected by operating condition factors, such as pH, temperature, air feed pressure and catalyst loading. Under the test reaction conditions, the N 2 selectivity changed from 85 6% to 98 1%, but NH 3 oxidation was kept near 100%. Based on a result of an optimal experiment, a favorable reaction condition has been explored, so that the WAO of NH 3 can be performed effectively towards N 2 production even under the mild operating condition.