Catalyst for decreasing the content of nitrogen oxides in flue g

Details Catalyst for decreasing the content of nitrogen oxides in flue g Catalyst for decreasing the content of nitrogen oxides in flue g

1986-08-11

1988-01-12

Dees, Carl F.

Catalyst, solid sorbent, or support therefor: product or process

Zeolite or clay, including gallium analogs

Clay

B01J 2012, B01J 2116

Patent

active

047191929

ABSTRACT:
A catalyst for decreasing the content of nitrogen oxides in flue gases. The catalyst contains at least one of the metals titanium, zirconium, vanadium, tungsten, molybdenum, or cerium in the form of one or more of their oxides combined with a silicate with a three-layer structure (three-layer silicate) which is or comprises talc. The three-layer silicate is preferably acid-activated while essentially retaining its crystalline layer structure and being not yet X-ray amorphous. The acid activation increases the BET surface area at least 15% and preferably at least 50% in terms of the BET surface area of the talc before acid activation. The atomic ratio of the silicon in the talc to the metal in the oxide is from 0.2 and 50 and preferably from 0.4 to 25.

REFERENCES:
patent: 3962135 (1976-06-01), Alafandi

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