Performance index of special catalyst for hydrogen production by methanol cracking
I : Technical part
1.Product characteristics and uses
The catalyst is suitable for the reaction of methanol steam reforming to H2 + CO2. It is a copper-zinc-aluminum catalyst with CuO as the main body and as the spacer. Due to the use of a new co-precipitation process technology and the addition of new additives, the effective copper surface area is large, the activity and stability are good, the pore volume is large, and the pore size distribution is adapted. The performance test results show that this series of catalysts have been in the position of similar products at home and abroad.
2.Main use conditions of the product
The operating temperature is 2.0 °C ~ 280 °C ( bed temperature ).
Normal operating temperature : 220 °C ~ 270 °C ( bed temperature )
Operating pressure : ≤ 1.2Mpa ( 2.5Mpa )
Liquid space velocity : ≤ 1.2h
The content of S in raw materials :
CT content in raw materials
3. Adoption of standards and quality standards
3.1 Adopt standard
This series of catalysts implement enterprise standards
3.2 Quality labeling
Catalyst quality standard
| Name index name | F104 | ||
| Activity ( CHOH conversion )% | ≥93.0 | ||
| Before reduction ( pressure measurement ) Average crushing strength | N/cm | long type | 160 |
| short type | 130 | ||
| The strength is less than 110N / cm particle percentage %. | long type | ≤8 | |
| The strength is less than 90N / cm particle percentage %. | short type | ≤8 | |
| Abrasion % | ≤10 | ||
Activity determination conditions : pressure 1.2Mpa, the middle of the bed temperature 215 °C, liquid space velocity 1h-1, the original particle size capacity of 75ml.
Raw material composition : CH3OH : 50 % H2O : 50 %
4.Main physical properties and chemical composition of the catalyst
Physical and chemical properties of catalyst
| index | F104 | |
| physical property | appearance | Black metallic luster cylinder |
| shape | Φ5*5 | |
| packing density（Kg/L） | 1.2~1.3 | |
| chemical composition | CuO(%) | 64±1 |
| Zno(%) | 〉13.5 | |
| ZrO2(%) | 〈 10.0 | |
| packing density(%) | paucity | |
Methanol steam reforming reaction mechanism :
The temperature distribution of the bed is increased from top to bottom, and the upper part of the bed. Therefore, the inlet gas temperature is maintained at 210 °C to avoid the by-products produced by the lower temperature of the upper part, resulting in the decrease of catalyst activity. Long-term low-temperature operation will cause paraffin to cover the catalyst and cause deactivation.