公开(公告)号：US10047651B2

公开(公告)日：2018-08-14

申请号：US15370451

申请日：2016-12-06

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Rahul Mital ,  David Brown ,  Wei Li ,  Jianwen Li

IPC: F01N3/10 ,  F01N3/035 ,  B01D46/00 ,  B01D53/94 ,  B01J21/06 ,  B01J23/10 ,  B01J23/30 ,  B01J23/745 ,  B01J35/00 ,  B01J35/04 ,  F01N3/023

Abstract: Selective catalytic reduction filter (SCRF) devices and systems incorporating the same are provided. Systems can include an exhaust gas source, an exhaust gas conduit capable of receiving an exhaust gas stream from the exhaust gas source, and an SCRF device in fluid communication therewith. The SCRF device can include a filter, a selective catalytic reduction (SCR) catalyst disposed on at least portion of the filter, and a soot oxidizing catalyst (SOC) material disposed on at least a portion of one or more of the filter and the SCR catalyst. The SOC material can include one or more transition metal oxides, excluding platinum group metals. The SOC material can include one or more of a titanium oxide, an iron oxide, a tungsten oxide, a cerium oxide, and acidic zirconia. The SOC material can be in amorphous form. The SOC material can be biased towards to the upstream side of the filter.

公开(公告)号：US20180156089A1

公开(公告)日：2018-06-07

申请号：US15370451

申请日：2016-12-06

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Rahul Mital ,  David Brown ,  Wei Li ,  Jianwen Li

IPC: F01N3/035 ,  B01D46/00 ,  B01D53/94 ,  F01N3/023 ,  B01J35/00 ,  B01J35/04 ,  B01J23/30 ,  B01J23/745 ,  B01J23/10 ,  B01J21/06

CPC classification number: F01N3/035 ,  B01D46/0002 ,  B01D46/0027 ,  B01D46/0061 ,  B01D53/9409 ,  B01D53/9431 ,  B01D53/9477 ,  B01D2255/9155 ,  B01D2279/30 ,  B01J21/063 ,  B01J23/10 ,  B01J23/30 ,  B01J23/745 ,  B01J35/0006 ,  B01J35/04 ,  F01N3/023 ,  F01N3/103 ,  F01N3/2892 ,  F01N9/00 ,  F01N13/009 ,  F01N2240/20 ,  F01N2330/60 ,  F01N2510/065 ,  F01N2510/0682 ,  F01N2610/02

Abstract: Selective catalytic reduction filter (SCRF) devices and systems incorporating the same are provided. Systems can include an exhaust gas source, an exhaust gas conduit capable of receiving an exhaust gas stream from the exhaust gas source, and an SCRF device in fluid communication therewith. The SCRF device can include a filter, a selective catalytic reduction (SCR) catalyst disposed on at least portion of the filter, and a soot oxidizing catalyst (SOC) material disposed on at least a portion of one or more of the filter and the SCR catalyst. The SOC material can include one or more transition metal oxides, excluding platinum group metals. The SOC material can include one or more of a titanium oxide, an iron oxide, a tungsten oxide, a cerium oxide, and acidic zirconia. The SOC material can be in amorphous form. The SOC material can be biased towards to the upstream side of the filter.

公开(公告)号：US20180334939A1

公开(公告)日：2018-11-22

申请号：US15597636

申请日：2017-05-17

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Rahul Mital ,  Charles Solbrig ,  Yong Miao ,  David Brown

IPC: F01N3/20 ,  F01N3/035 ,  F01N3/10 ,  C23F11/00 ,  B01D53/94 ,  B01J35/04

CPC classification number: F01N3/2066 ,  B01D53/9477 ,  B01D2255/1021 ,  B01D2255/1023 ,  B01D2255/1025 ,  B01D2255/1026 ,  B01D2255/1028 ,  B01D2255/2027 ,  B01D2255/2042 ,  B01D2255/20707 ,  B01D2255/20723 ,  B01D2255/20738 ,  B01D2255/20746 ,  B01D2255/20761 ,  B01D2255/20769 ,  B01D2255/20776 ,  B01D2255/402 ,  B01D2255/502 ,  B01D2255/504 ,  B01J35/04 ,  C23F11/00 ,  F01N3/035 ,  F01N3/106 ,  F01N3/2013 ,  F01N2530/02 ,  F01N2610/02 ,  F01N2610/10 ,  F01N2610/1453

Abstract: Electric heaters comprising corrosion resistant metals (CRM), and exhaust gas treatment systems incorporating the same, are provided. Exhaust gas treatment systems include selective catalytic reduction devices (SCR) disposed downstream from reductant injectors. Electric heaters can be disposed downstream from reductant injectors, and optionally contiguous with or incorporated with a catalytic composition of the SCR. CRMs resist corrosion to reductant, which includes t ammonia and/or nitrogen-rich substances capable of decomposing into ammonia, such as urea. CRMs include aluminum, chromium, iron, and one or more stabilizers. CRMs can include about 5.0% to about 7.25% aluminum, about 15% to about 25% chromium, up to about 0.30% stabilizers, and a balance comprising iron. Stabilizers can include hafnium, yttrium, and zirconium. Stabilizers can include about 0.001% to about 0.11% yttrium and about 0.001% to about 0.11% Hf.