HOME > Products > Exhaust Gas Treatment Catalyst > Catalyst Poison Measures > Guard Bed Catalyst(Pretreater)

pretreatingN-U has established guard bed technology to protect catalyst ahead of other catalyst companies. It is required to install Guard bed catalyst upstream of catalyst bed to capture and decompose catalyst poisons. Guard bed catalyst can extend life of catalyst.

Guard Bed Catalyst List

Item/TypeNA-seriesNB-2CNC-2
Type of Shape Spherical Ceramic Foam Honeycomb Monolith
Base Material Alumina Ceramic Ceramic
Standard Size, mm φ2.5〜4.0
φ4.0〜6.0
430×580×t40
430×580×t60
150×150×t50
140×190×t40
140×190×t50
ABD, g/cc 0.3〜0.4 0.37〜0.46 0.4〜0.5
Inlet Temperature, degC 350~400 350~400 350~400
Pressure Drop High Middle Low
Performance High Middle High
Standard SV, 1/hr 5,000~20,000 30,000~50,000 20,000~40,000
Remark Applicable for only down-flow ---

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Effect of Guard Bed Catalyst for Exhaust Gas Treatment

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