Gas separation – Means within gas stream for conducting concentrate to collector
Patent
1988-04-28
1989-09-26
Doll, John
Gas separation
Means within gas stream for conducting concentrate to collector
55 74, 55 75, 423210, 423239, 423328, 423592, 423604, 423605, 423606, 423608, 423610, 423618, 423622, 423625, 423628, 423633, 423635, B01D 1900, B01D 5302
Patent
active
048697354
ABSTRACT:
Here is provided an adsorbent for adsorbing and removing an arsenic compound which becomes a catalyst poison in a selective contact reduction process for removing nitrogen oxides (NOx) from a combustion exhaust gas by the use of an ammonia as a reducing agent and a denitrating catalyst.
The adsorbent of the present invention comprises a material in which the total volume of pores is 0.2 to 0.7 cc/g and the volume of the pores having a pore diameter of 300 .ANG. or more is 10% or more with respect to the total pore volume, and the material is a specific element, its oxide, an ion-exchanged zeolite or the like.
In addition, the present invention is directed to a method for removing the arsenic compound from the combustion exhaust gas by injecting the adsorbent into the flow of the gas on the upstream side of the denitrating catalyst.
REFERENCES:
patent: 711187 (1902-10-01), Stone
patent: 798302 (1905-08-01), Scharff et al.
patent: 3812653 (1974-05-01), Massoth et al.
patent: 4578256 (1986-03-01), Nishino et al.
patent: 4593148 (1986-06-01), Johnson et al.
patent: 4743435 (1988-05-01), Kitahara et al.
Fukuda Morio
Hanada Masayuki
Iida Kozo
Imanari Makoto
Kobayashi Norihisa
Catalysts & Chemical Co., Ltd.
Doll John
Goldberg Jules E.
Langel Wayne A.
Mitsubishi Petrochemical Engineering Co., Ltd.
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