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Low-temperature catalyst

low-temperature catalyst
low-temperature catalyst
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low-temperature

Description

Stan­dard catal­y­sers With this sys­tem, the ex­haust air pro­duced dur­ing roast­ing un­der­goes cat­alytic af­ter­burn­ing once it has been ther­mally pre­cleaned. This in­volves heat­ing the ex­haust air from the roast­ing process to a tem­per­a­ture of around 450 °C using an ad­di­tional blower burner. Then it is passed through a catal­yser. The in­crease in tem­per­a­ture and the cat­alytic re­ac­tion re­sult in con­sid­er­ably lower emis­sions. Using ther­mal pre­clean­ing and a cat­alytic af­ter­burner re­duces the total car­bon con­tent of the ex­haust air pro­duced dur­ing roast­ing to below the limit stip­u­lated in Ger­many’s air pol­lu­tion con­trol reg­u­la­tions. Low-tem­per­a­ture catal­y­sers This ex­haust air clean­ing sys­tem also utilises ther­mal pre­clean­ing fol­lowed by cat­alytic af­ter­burn­ing of the ex­haust air pro­duced dur­ing roast­ing. How­ever, the use of a low-tem­per­a­ture catal­yser here means that it only needs to be heated to 320 °C. The ex­haust air nev­er­the­less com­plies with the total car­bon con­tent limit stip­u­lated in Ger­many’s air pol­lu­tion con­trol reg­u­la­tions. Thanks to the use of a lower pre­clean­ing tem­per­a­ture, it is pos­si­ble to re­duce both en­ergy con­sump­tion and NOx emis­sions (de­pend­ing on the de­gree of roast).
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