HPM (Z-2): Manganese Oxide VOC Oxidation and Combustion Catalyst

The HPM (also known as Z-2) catalyst combines high activity in oxidation of volatile organic compounds (VOCs) with unique thermal stability for catalytic combustion.

Specifications:

Active component		Non-stoichiometric manganese oxide, MnOx
Support		Alumina, Al2O3
Composition:	Mn	> 10 % as Mn2O3
	Al	Balance
Common shapes		3 - 4 mm pellets; 10, 15, and 25 mm rings
Internal surface area		25 - 35 m2/g
Bulk density		0.5 - 0.8 g/cm3, depending on shape and size

HPM catalyst offers many practical advantages proven by dozens of commercial applications:

• It has been proven in dozens of commercial VOC oxidation units worldwide to be an effective, reliable, and low-maintenance catalyst for a large variety of VOC oxidation applications, combining high activity with very competitive price.

• It is produced in a variety of sizes and shapes, from 3-4 mm pellets to 25 mm (1 in.) rings, to fit the requirements of each particular application. The largest sizes, 15 mm and 25 mm rings, are particularly effective in converting regenerative thermal oxidizers (RTOs) into catalytic units.

• It has been designed to operate in a wide temperature range, up to 700 °C (~ 1,300°F) long-term, with short excursions up to ~ 900 °C (~ 1,650 °F). This makes the catalyst particularly attractive for applications where surges of VOC concentration would cause sintering of other materials.

• Its unique thermal stability makes HPM very well suited for the treatment of gases loaded with high concentrations of combustible particulates. Periodical burning of particulates, required to clean up the oxidizer, often proceeds at ~ 500 - 600 °C (~ 930 - 1,100 °F), with surges occasional surges over ~ 900 °C ( ~ 1,650 °F).

• HPM is not affected by chlorine and bromine that can be found in VOC streams and poison many commercial catalysts. Years of treating chlorinated compounds in a hundred ppm range can be achieved.

The chart below, showing changes in HPM catalytic activity over time, demonstrates that the catalyst is capable of over five years of operation without activity loss.