Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Metal – metal oxide or metal hydroxide
Patent
1996-01-19
1998-11-24
Bell, Mark L.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Metal, metal oxide or metal hydroxide
502304, 502309, 502325, 502326, 4232391, 4232132, B01J 2332, B01J 2340, B01J 800
Patent
active
058406492
ABSTRACT:
The present invention relates to a Mn-added titania carrier obtained by adding a Mn salt to amorphous titania and baking the titania. The invention also relates to an NOx adsorbent comprising the above-mentioned titania carrier and adsorbing components comprising oxides of Ru and/or Ce supported on the carrier. The invention also relates to an NOx adsorbent comprising the above-mentioned titania carrier and adsorbing components comprising oxides of Ru and/or Ce and an oxide of at least one metal among Ag, Cu and Mn supported on the carrier. The NOx adsorbents embodying the invention are effectively used for efficiently adsorbing and removing NOx from gases which contain much moisture and low-concentration, for example, a few ppm NOx such as gases discharged by ventilation from highway tunnels.
REFERENCES:
patent: 4814153 (1989-03-01), Kobayashi et al.
patent: 4929586 (1990-05-01), Hegedus et al.
patent: 5055442 (1991-10-01), Osaka et al.
patent: 5413771 (1995-05-01), Ziebarth et al.
patent: 5439868 (1995-08-01), Onitsuka et al.
European Search Report dated Apr. 18, 1996; Ref. No. 14-123 Me/ja; Application No. 96100643.4 listing above cited reference.
Fukuju Atsushi
Ichiki Masayoshi
Kondo Kazuhiro
Sairyo Yuki
Bell Mark L.
Hailey Patricia L.
Hitachi Zosen Corporation
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