1. Purpose
The TH-3 dehydrogenation catalyst is used for the dehydrogenation of CO2feed gas in the urea production process, which can prevent the explosion hazard caused by the accumulation of hydrogen gas in the CO2feed gas.
II. Reaction Principle
2H2 + O2 = 2H2O Δ H= -483KJ/mol
2CO + O2 = 2CO2 Δ H= -566KJ/mol
III. Main Physical and Chemical Properties
|
Appearance |
Granularity |
Crushing strength |
Bulk density |
Composition |
|
Grey brown chromosphere |
2-4 |
≥ 20 |
0.6~0.7 |
Pt、Pd， Special active agents, Al2O3 |
IV. Operating Conditions
|
Project
|
Total sulfur PPm |
CO mg/m3 |
CH4 mg/m3 |
CH3OH mg/m3 |
（H2+CO）/O2 |
Airspeed |
Temperature ℃ |
Pressure MPa |
|
Indicators |
≤ 0.1 |
≤ 2000 |
≤ 200 |
≤ 300 |
≤ 1.0 |
≤ 3.0 |
150~220 |
150~220 |
Under the above operating conditions, if the residual hydrogen content at the outlet of the dehydrogenation tower is less than 10-50ppm, the lifespan of the TH-3 dehydrogenation catalyst can reach 5 years.
V. Application Status
The TH-3 dehydrogenation catalyst has been applied in fertilizer plants such as Zhenhai Refining and Chemical Fertilizer Plant, Shandong Dong'a Fertilizer Plant, Shanghai Wujing Chemical Plant, Sichuan Meifeng, etc., with a market share of over 60% and satisfactory performance.
