以VK-701 LEAP5^(TM)催化剂应对未来硫酸工业SO_2排放挑战

Meeting future SO_2 emission challenges with Topsφe's new VK-701 LEAP5^(TM) sulphuric acid catalyst

介绍了托普索公司基于LEAP5^(TM)技术而开发的一种新型催化剂VK-701。该催化剂通过改进气体在催化熔融物中的传递效率和提高V^(5+)含量,在低温下对高浓度转化气具有极高的活性。在典型的4段一转一吸硫酸装置的最后一段装填VK-701,SO_2排放量较之装填含铯催化剂可减少20%～30%,较之装填含钾催化剂可减少30%～40%。在最有效的"3+1"二转二吸装置第三段装填VK-701,SO_2排放量可减少40%,尾气ρ(SO_2)可降低至175 mg/m^3。VK-701的高活性已在一转一吸硫磺制酸装置的工业运行中得到证实。

A new catalyst designated VK-701 develpped by Topsφe on the basis of its novel LEAP5^（TM） technology is introduced.The new catalyst offers exceptionally high activity at low temperature in converted strong gases because of improved gas transport deficiencies through the catalytic melt and higher V^（5＋） content.SO_2 emissions from a typical 4-bed single-absorption sulphuric acid plant can be reduced by 20%-30%by loading VK-701 in the final bed compared to a caesium-promoted catalyst or by 30%- 40%compared to a standard potassium-promoted catalyst.SO_2 emissions from the most efficient double-absorption plants can typically be reduced by 40% when loading VK-701 in the third pass of a 3 ＋ 1 plant and achieve down to 175 mg/m^3.Operating experience from a sulphur-burning single-absorption plant confirms the high activity of VK-701.