CATALYST FOR REMOVING NITROGEN OXIDES FROM WASTE GAS

Title:

CATALYST FOR REMOVING NITROGEN OXIDES FROM WASTE GAS

Document Type and Number:

Japanese Patent JPH0283040

Kind Code:

A

Abstract:

PURPOSE: To efficiently remove nitrogen oxides in a high temperature range by using a specified acid type mordenite as a catalyst in the catalytic reduction method using ammonia.

CONSTITUTION: Commercially available Na type mordenite is subjected to repeated immersion treatment by using 0.1N-HCl or 1-3N-NH4Cl so as to ultimately obtain an oxidation type mordenite represented by the chemical formula (Hx-z).(Naz).[(AlO2)x.(SiO2)y].mH2O and having a z/x (molar ratio) of not more than 0.05 and a y/x (molar ratio) of not more than 5. The resulting product is deposited on a base material formed of ceramic fiber to prepare an oxidation type mordenite carrying catalyst, whereby nitrogen oxides can be removed efficiently from waste gas in a high temperature range of 400°C-700°C.

More Like This:

JP2013531168	Methods and equipment related to cooling the input unit of selective catalyst reduction systems
JP2003083039	EXHAUST GAS TREATMENT DEVICE
JPH07217425	EXHAUST EMISSION CONTROL DEVICE FOR VEHICLE

Inventors:

YOSHIMOTO MASAFUMI
NAKATSUJI TADAO
NAGANO KAZUHIKO

Application Number:

JP23585988A

Publication Date:

March 23, 1990

Filing Date:

September 20, 1988

Export Citation:

Click for automatic bibliography generation Help

Assignee:

SAKAI CHEMICAL INDUSTRY CO

International Classes:

B01D53/94; B01J29/18; (IPC1-7): B01D53/36; B01J29/18

Domestic Patent References:

JPS5170179A

1976-06-17

Next Patent: CATALYST FOR HYDROGENATION OF HYDROCARBON AND ITS PREPARATION