Abstract
This work adopted aqueous solutions of ammonia for use in catalytic liquid-phase reduction in a trickle-bed reactor with a platinum-rhodium bimetallic catalyst, prepared by the co-precipitation of chloroplatinic acid (H2PtCl6) and rhodium nitrate [Rh(NO3) 3]. The experimental results demonstrated that a minimal amount of ammonia was removed from the solution by wet oxidation in the absence of any catalyst, while approximately 97.0% of the ammonia was removed by wet oxidation over the platinum-rhodium bimetallic catalyst at 230°C with an oxygen partial pressure of 2.0 MPa. The oxidation of ammonia has been studied as a function of pH, and the main reaction products were determined. A synergistic effect is manifest in the platinum-rhodium bimetallic structure, in which the material has the greatest capacity to reduce ammonia. The reaction pathway linked the oxidizing ammonia to nitric oxide, nitrogen, and water.
| Original language | English |
|---|---|
| Pages (from-to) | 686-695 |
| Number of pages | 10 |
| Journal | Water Environment Research |
| Volume | 82 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 2010 Jan 1 |
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All Science Journal Classification (ASJC) codes
- Environmental Chemistry
- Water Science and Technology
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Treatment of ammonia by catalytic wet oxidation process over platinum-rhodium bimetallic catalyst in a trickle-bed reactor : Effect of pH. / Hung, Chang Mao; Lin, Wei Bang; Ho, Ching Lin; Shen, Yun-Hwei; Hsia, Shao Yi.
In: Water Environment Research, Vol. 82, No. 8, 01.01.2010, p. 686-695.Research output: Contribution to journal › Article
TY - JOUR
T1 - Treatment of ammonia by catalytic wet oxidation process over platinum-rhodium bimetallic catalyst in a trickle-bed reactor
T2 - Effect of pH
AU - Hung, Chang Mao
AU - Lin, Wei Bang
AU - Ho, Ching Lin
AU - Shen, Yun-Hwei
AU - Hsia, Shao Yi
PY - 2010/1/1
Y1 - 2010/1/1
N2 - This work adopted aqueous solutions of ammonia for use in catalytic liquid-phase reduction in a trickle-bed reactor with a platinum-rhodium bimetallic catalyst, prepared by the co-precipitation of chloroplatinic acid (H2PtCl6) and rhodium nitrate [Rh(NO3) 3]. The experimental results demonstrated that a minimal amount of ammonia was removed from the solution by wet oxidation in the absence of any catalyst, while approximately 97.0% of the ammonia was removed by wet oxidation over the platinum-rhodium bimetallic catalyst at 230°C with an oxygen partial pressure of 2.0 MPa. The oxidation of ammonia has been studied as a function of pH, and the main reaction products were determined. A synergistic effect is manifest in the platinum-rhodium bimetallic structure, in which the material has the greatest capacity to reduce ammonia. The reaction pathway linked the oxidizing ammonia to nitric oxide, nitrogen, and water.
AB - This work adopted aqueous solutions of ammonia for use in catalytic liquid-phase reduction in a trickle-bed reactor with a platinum-rhodium bimetallic catalyst, prepared by the co-precipitation of chloroplatinic acid (H2PtCl6) and rhodium nitrate [Rh(NO3) 3]. The experimental results demonstrated that a minimal amount of ammonia was removed from the solution by wet oxidation in the absence of any catalyst, while approximately 97.0% of the ammonia was removed by wet oxidation over the platinum-rhodium bimetallic catalyst at 230°C with an oxygen partial pressure of 2.0 MPa. The oxidation of ammonia has been studied as a function of pH, and the main reaction products were determined. A synergistic effect is manifest in the platinum-rhodium bimetallic structure, in which the material has the greatest capacity to reduce ammonia. The reaction pathway linked the oxidizing ammonia to nitric oxide, nitrogen, and water.
UR - http://www.scopus.com/inward/record.url?scp=77958194522&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77958194522&partnerID=8YFLogxK
U2 - 10.2175/106143010X12609736966883
DO - 10.2175/106143010X12609736966883
M3 - Article
VL - 82
SP - 686
EP - 695
JO - Water Environment Research
JF - Water Environment Research
SN - 1061-4303
IS - 8
ER -