26 February 2016
Valerii Bukhtiyarov, director of Boreskov Institute of Catalysis (Novosibirsk), reported on the prospects of using the renewable vegetable stock in the fuel and petrochemical complex of Tatarstan
We develop methods for preparation of monolithic of unique chemical composition and in a series of special geometry. For this purpose we have all nesessary laboratory scale equipment: mixer for the preparation of extrusion masses, laboratory extruder, desiccator and ovens for the monolith thermal treatment (up to 1600oC). For the preparation of monolith supports with standard dimensions (diameter - 10, 20 and 45 mm) several dies were designed and manufactured.
|Type 1||Type 2||Type 3|
|Diameter||10 mm||20 mm||45 mm|
|Channel size||1x1 mm||1x1 mm||2x2 mm|
|Wall thickness||0.25 mm||0.5 mm||0.5 mm|
The elements of die for the monolith structure preparation
with diameter of 20 mm extrusion are presented.
At present more than five types of monolithic supports with the optimal physicochemical properties are prepared and tested both in BIC and other laboratories in frame
of our co-operation projects.
|SBET m2/g||Phase composition
|Mech. Strength, kg/cm2||Pore volume
|TiO2 / 700oC||86||TiO2(anatase) + Al2O3*SiO2||8||0.36|
|TiO2 + ZrO2 / 700oC||69||TiO2(anatase) + ZrO2(cub.) + Al2O3*SiO2||13||0.36|
|Alumosilicate / 700oC||33||Al2O3*SiO2 + α-SiO2||19.5||0.12|
|Al2O3 / 600oC||190||γ-Al2O3||28||0.34|
|H-ZSM-5 / 600oC||350||H-ZSM-5 + Al2O3*SiO2||20||0.4|
The monoliths based on TiO2, ZrO2, and Al2O3 still possess relatively high surface area and acceptable mechanical strength that allows their application as supports for monolith catalysts.
Washcoated monolith supports
Shematic presentaion of monolith
channel with supported washcoating layer.
Micrograph of cross-section view of washcoating layer on monolith surface with different enlargement.
Monolithic honeycomb supports and catalysts
Technologies are Adopted on Pilot Scale:
Technologies for preparing honeycomb monolithic supports and catalysts are covered by the Russian patents.