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Protective bed (sacrificial layer)

To protect the methanol steam reforming catalyst ReforMax M from chloride-containing impurities in the methanol feed gas, a guard bed made of ShiftGuard® 200 is installed upstream. ShiftGuard® 200 can also be used as a protective fixed bed against chloride impurities upstream of the low-temperature water-gas shift (LTS) catalyst, ShiftMax® 217. The inherently high LTS activity of ShiftGuard® 200 further enhances the performance of the LTS catalyst.

To protect fixed-bed catalysts from tar and dust contamination, the high-temperature stable Al₂O₃-based ShiftGuard® 100, with its high pore volume, can be used in a suitable guard bed.

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