| abstract |
The preparation method and application of 18 loaded Cus of SAPO and Tb composite catalysts, for catalytic removal nitrogen oxides.18 molecular sieves of SAPO are prepared by hydro-thermal method, by itself and NH 4 Cl is exchanged, and prepares ammonia type NH 4 18 molecular sieves of/SAPO, then by NH 4 18 molecular sieves of/SAPO add in copper nitrate and terbium nitrate solution, by multiple ion-exchange, prepare high-specific surface area (550m 2 / g~600m 2 / g) compound 18 molecular sieve catalysts of Tb CuSAPO.The made catalyst of the present invention is in the range of wider temperature (150 DEG C~600 DEG C), to high-speed (10,000h ‑1 ~200,000h ‑1 ), high O 2 Concentration (10vl.%~20vl.%), high H 2 O content (5wt%~10wt%), NH 3 Content (300ppm~1000ppm) and low NO concentration (300ppm~1000ppm) pollutant have high catalytic removal effect (NO conversion ratios 30%~95%).And the catalyst kept NO initial conversions under wider temperature range in 100 hours. |