Low Temperature Ammonia Remediation Catalysts低溫氨氣分解催化劑
Ammonia (NH3) and odorous smell (nitrogen containing compounds) in the air are contaminants and are harmful to human health. Since more and more people concern for the indoor air quality after the outbreak of SARS, methods have been developed to eliminate the contaminants.
Conventional supported metal oxide catalysts usually have a low catalytic activity at low temperature. Another disadvantage is that it is of high metal oxide loading, formation of by-products. In addition, high temperature (>250'C) is also required for efficient degradation.
A new nano-structure catalyst having a larger surface area is introduced. The new catalyst can effectively remove ammonia and nitrogen containing compounds at low temperature and in the absence of UV illumination. It provides a catalytic material including a metal oxide catalyst that forms monomer or polymer on the support surface, yet preventing the formation of metal oxide clusters on support surface. The present invention is stable and active even at low temperature. It can also tolerate a higher concentration of pollutants.
The invention can be used in air purifier and air handling appliances such as fan, air conditioner and air exhaust, etc.
1. Actively remove odor at low temperature
2. A compact prototype air remediation unit
3. Production cost is low
- Air purifier
- Air handling appliances such as fan, air conditioner and air exhaust, etc
Patent Number: US8242049B2
Application Number: US2006567750A
Inventor: Yeung, King-Lun | Lui, Pik-Ying | Ho, Ka-Yee | Banares, Miguel Angel
Priority Date: 8 Dec 2005
Priority Number: US8242049B2
Application Date: 7 Dec 2006
Publication Date: 14 Aug 2012
IPC Current: B01J002106 | B01D005354 | B01D005356 | B01D005358 | B01J002320 | B01J002322 | B01J003510 | B01J003702 | B01J0037025
US Class: 502350 | 423235 | 423237 | 4232391 | 4235948 | 423598 | 502300 | 502353 | 502439
Assignee Applicant: The Hong Kong University of Science & Technology
Title: Low temperature ammonia remediation catalysts
Usefulness: Low temperature ammonia remediation catalysts
Summary: (I) is useful for removing the nitrogen-containing compounds such as ammonia or diethylamine. from the air (claimed). (I) is useful as remediation catalyst in the oxidation of nitrogen-containing contaminants, which are harmful to health.
Novelty: Catalytic material, useful to remove nitrogen-containing compound e.g. ammonia from air, comprises first metal oxide in non-crystalline form and second metal oxide, which is a crystal having a surface
化工/材料
化工/材料應用
7 Dec 2006
US 11/567750
US 8242049
TTC.PA.268
香港
