{"id":463,"date":"2019-09-17T14:23:32","date_gmt":"2019-09-17T12:23:32","guid":{"rendered":"https:\/\/interkat.com\/?page_id=463"},"modified":"2021-09-03T18:24:22","modified_gmt":"2021-09-03T16:24:22","slug":"ammonia-slip-catalyst-asc","status":"publish","type":"page","link":"https:\/\/interkat.com\/en\/technologies\/ammonia-slip-catalyst-asc\/","title":{"rendered":"Ammonia Slip Catalyst (ASC)"},"content":{"rendered":"\n<p>The\nconversion of nitrogen oxides (NO<sub>X<\/sub>) of a SCR system highly depends\non the availability of ammonia (NH<sub>3<\/sub>) generated from the injected\nAdBlue\u00ae (32.5% aqueous urea solution).<\/p>\n\n\n\n<p>In theory\nthe optimal NH<sub>3<\/sub>\/NO<sub>X<\/sub> ratio with 1:1 (ANR [Ammonia NO<sub>X<\/sub>\nRatio] = 1) is given by the reaction stoichiometry. In practice the non-uniform\nammonia distribution throughout the catalyst and the oxidation of ammonia at\nhigh temperatures in a SCR system leads to a higher ANR (ANR &gt; 1) to achieve\nthe maximum NO<sub>X<\/sub> conversion. An ANR &gt; 1 usually results in an\nammonia slip due to the fact that some channels of the honeycomb structured\ncatalyst substrate get more ammonia than required for the SCR reaction and this\nexcess gas passes through the catalyst. Especially if it is required to realize\nNO<sub>X<\/sub> conversion larger than 90 % or during dynamic operation cycles,\nthe ammonia slip becomes an issue.<\/p>\n\n\n\n<p>Gaseous\nammonia has a very low smell threshold of approx. 15 ppm causing unpleasant\nodors and also leads to irritation of eyes and the respiratory system of a\nhuman being.<\/p>\n\n\n\n<p>The task of\nthe ammonia slip catalyst is the selective oxidation of the ammonia slip (NH<sub>3<\/sub>)\nto harmless nitrogen (N<sub>2<\/sub>) and water (H<sub>2<\/sub>O) and therefore\navoiding smell and health risks.<\/p>\n\n\n\n<p>2 NH<sub>3<\/sub> + 3\/2 O<sub>2<\/sub> \u2192 N<sub>2<\/sub> + 3 H<sub>2<\/sub>O<\/p>\n\n\n\n<p>In combination with an adapted dosing strategy of urea, INTERKAT\u00b4s ASC technology enables our customers to raise the overall SCR conversion of their systems due to a higher applicable ANR ratio without the disadvantage of high ammonia slip. An additional benefit of our ASC is the oxidation of carbon monoxide (CO) and hydrocarbons (HC) e.g. formaldehyde (CH<sub>2<\/sub>O) passing the SCR catalysts. A customized catalyst design mostly prohibits the oxidation of ammonia to laughing gas (N<sub>2<\/sub>O) or nitrogen oxide (NO).<\/p>\n\n\n\n<p>2 NH<sub>3<\/sub> + 2 O<sub>2<\/sub> \u2192 N<sub>2<\/sub>O + 3 H<sub>2<\/sub>O<\/p>\n\n\n\n<p>2 NH<sub>3<\/sub> + 5\/2 O<sub>2<\/sub> \u2192 2 NO + 3 H<sub>2<\/sub>O<\/p>\n\n\n\n<p><strong>\u201cINTERKAT\nwill always provide the optimal catalyst for your application\u201d<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The conversion of nitrogen oxides (NOX) of a SCR system highly depends on the availability of ammonia (NH3) generated from the injected AdBlue\u00ae (32.5% aqueous urea solution). In theory the optimal NH3\/NOX ratio with 1:1 (ANR [Ammonia NOX Ratio] = 1) is given by the reaction stoichiometry. In practice the non-uniform ammonia distribution throughout the<a class=\"excerpt-read-more\" href=\"https:\/\/interkat.com\/en\/technologies\/ammonia-slip-catalyst-asc\/\" title=\"ReadAmmonia Slip Catalyst (ASC)\">&#8230; Read more &raquo;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":10,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"template-product-oxi.php","meta":{"_acf_changed":false,"advgb_blocks_editor_width":"","advgb_blocks_columns_visual_guide":"","footnotes":""},"class_list":["post-463","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Ammonia Slip Catalyst (ASC) - Interkat<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/interkat.com\/en\/technologies\/ammonia-slip-catalyst-asc\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ammonia Slip Catalyst (ASC) - Interkat\" \/>\n<meta property=\"og:description\" content=\"The conversion of nitrogen oxides (NOX) of a SCR system highly depends on the availability of ammonia (NH3) generated from the injected AdBlue\u00ae (32.5% aqueous urea solution). 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In theory the optimal NH3\/NOX ratio with 1:1 (ANR [Ammonia NOX Ratio] = 1) is given by the reaction stoichiometry. In practice the non-uniform ammonia distribution throughout the... 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