Methanation Catalyst

 

CAS-KR-J01-K methanation catalyst is a new type of titanium - aluminum - rare earth - nickel catalyst which is suitable for methanation unit, to remove low concentration of carbon monoxide and carbon dioxide from hydrogen rich feed gas and convert it into inert gas methane and easily removed water, so as to achieve the purpose of purifying gas, the catalyst has unique properties such as high strength, high pore volume, high activity and easy loading and unloading, it obviously performs much better than other similar catalyst under high pressure and high space velocity.

CAS-KR-J01-K methanation catalyst pictures

 

 

 

1. Chemical Composition

Item	Parameter
NiO	18±1. 0%
TiO2	6-8%
Auxiliaries	4±0. 5%
Auxiliaries	2%
Al2O3%	balance
Physical water	Almost 0
Volume shrinkage	Almost 0

 

2. Physical Properties

Item	Parameter
Appearance	Grayish-black sphere
Specification(mm)	Φ4. 5～5. 5 or Φ3. 0～4. 0
Granular Strength against pressure	≥140, ≥120
Bulk density	0. 9±0. 03
Specific surface area(m2/g)	≥120

 

 

1)low carbon oxide concentrations in outlet gas.

2)low and stable pressure drop due to high strength and sphere structure

3)excellent thermal stability

4)easy for activation and start-up

5)high ability for anti-external contaminations

6)high activity and selectivity

 

 

Item	Parameter
The content of S in the feed gas	≤0. 1PPm
The content of Cl in the feed gas appearance	≤0. 03PPm
Activation temperature:	210°C
Service temperature	250～430°C
Initial inlet temperature:	250～270°C
Operation condition:	0. 5～32. 0MPa
Operation space velocity	≤10000h-1

 

 

Methanation reaction is highly exothermic reaction, the reaction equation is as follows:

CO + 3H₂ → CH₄+ H₂O △H =－206. 2KJ/mol

CO₂ + 4H₂ → CH₄+ 2H₂O △H =－165. 0KJ/mol

The main function of methanation process is to convert CO and CO2(which are toxic to the subsequent process catalysts) from the mixture into methane, so as to achieve the purpose of purifying hydrogen, improving the gas calorific value of product and reducing environmental pollution, For example, in the ammonia synthesis industry, methanation is used to reduce CO and CO2 concentrations below 10ppm and prevent iron catalyst poisoning. in addition, methanation is also used for the purification and cleaning of natural gas.

 

Methanation flow chart

 

 

1) Requirements for the content of S in feed gas: ≤ 0. 1PPm

2) Requirements for the Cl^- content in the feed gas: ≤ 0. 03PPm

3) Requirements for feed gas import volume of CO+CO₂< 0. 7%

4) It is very important to maintain the normal operating temperature: The overtemperature of high concentration CO2 will cause the carbon deposition reaction. Over-temperature caused by high CO concentration at the inlet deactivates the catalyst, mainly forming nickel carbonyl. the production temperature can not be controlled too low, low temperature gas conduction is the main cause of methanation catalyst deactivation.

 

 

 

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