On the performance of Pd and Rh catalysts over different supports in the hydrodechlorination of the MCPA herbicide

Elena Diaz; Angel F. Mohedano; Jose A. Casas; Cigdem Shalaby; Semih Eser; Juan J. Rodriguez

doi:10.1016/j.apcatb.2015.12.054

On the performance of Pd and Rh catalysts over different supports in the hydrodechlorination of the MCPA herbicide

Elena Diaz, Angel F. Mohedano, Jose A. Casas, Cigdem Shalaby, Semih Eser, Juan J. Rodriguez

John and Willie Leone Department of Energy & Mineral Engineering (EME)

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

Commercial and own-made Pd and Rh catalysts supported on alumina, zeolite Y (ZY) and two kinds of silica (Fumed Silica (FS) and SBA-15), were tested in the aqueous phase hydrodechlorination of the 4-chloro-2-methylphenoxyacetic acid (MCPA) herbicide. Pd catalysts showed higher activity than Rh and regarding the supports, the following sequence was found: Al₂O₃<FS<ZY»SBA-15. The catalysts with metal particle sizes within the range of 3.1-3.7nm, associated with Mⁿ⁺/M^o ratios between 0.7 and 1.7, showed higher activities. The most active catalysts of each series, the Al₂O₃-supported ones, showed a distribution of the metallic phase approaching an egg-shell configuration opposite to the rest. The Pd/Al₂O₃ catalyst, which was the most active, suffered a significant loss of activity upon the early stages on stream that could be ascribed to the formation of palladium chloride complexes as well as to deposition of species involved in the reaction.

Original language	English (US)
Pages (from-to)	151-156
Number of pages	6
Journal	Applied Catalysis B: Environmental
Volume	186
DOIs	https://doi.org/10.1016/j.apcatb.2015.12.054
State	Published - Jun 5 2016

All Science Journal Classification (ASJC) codes

Catalysis
General Environmental Science
Process Chemistry and Technology

Access to Document

10.1016/j.apcatb.2015.12.054

Cite this

@article{57aa279f74f4414292f231d5d50f3062,

title = "On the performance of Pd and Rh catalysts over different supports in the hydrodechlorination of the MCPA herbicide",

abstract = "Commercial and own-made Pd and Rh catalysts supported on alumina, zeolite Y (ZY) and two kinds of silica (Fumed Silica (FS) and SBA-15), were tested in the aqueous phase hydrodechlorination of the 4-chloro-2-methylphenoxyacetic acid (MCPA) herbicide. Pd catalysts showed higher activity than Rh and regarding the supports, the following sequence was found: Al2O3n+/Mo ratios between 0.7 and 1.7, showed higher activities. The most active catalysts of each series, the Al2O3-supported ones, showed a distribution of the metallic phase approaching an egg-shell configuration opposite to the rest. The Pd/Al2O3 catalyst, which was the most active, suffered a significant loss of activity upon the early stages on stream that could be ascribed to the formation of palladium chloride complexes as well as to deposition of species involved in the reaction.",

author = "Elena Diaz and Mohedano, {Angel F.} and Casas, {Jose A.} and Cigdem Shalaby and Semih Eser and Rodriguez, {Juan J.}",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier B.V.",

year = "2016",

month = jun,

day = "5",

doi = "10.1016/j.apcatb.2015.12.054",

language = "English (US)",

volume = "186",

pages = "151--156",

journal = "Applied Catalysis B: Environmental",

issn = "0926-3373",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - On the performance of Pd and Rh catalysts over different supports in the hydrodechlorination of the MCPA herbicide

AU - Diaz, Elena

AU - Mohedano, Angel F.

AU - Casas, Jose A.

AU - Shalaby, Cigdem

AU - Eser, Semih

AU - Rodriguez, Juan J.

PY - 2016/6/5

Y1 - 2016/6/5

N2 - Commercial and own-made Pd and Rh catalysts supported on alumina, zeolite Y (ZY) and two kinds of silica (Fumed Silica (FS) and SBA-15), were tested in the aqueous phase hydrodechlorination of the 4-chloro-2-methylphenoxyacetic acid (MCPA) herbicide. Pd catalysts showed higher activity than Rh and regarding the supports, the following sequence was found: Al2O3n+/Mo ratios between 0.7 and 1.7, showed higher activities. The most active catalysts of each series, the Al2O3-supported ones, showed a distribution of the metallic phase approaching an egg-shell configuration opposite to the rest. The Pd/Al2O3 catalyst, which was the most active, suffered a significant loss of activity upon the early stages on stream that could be ascribed to the formation of palladium chloride complexes as well as to deposition of species involved in the reaction.

AB - Commercial and own-made Pd and Rh catalysts supported on alumina, zeolite Y (ZY) and two kinds of silica (Fumed Silica (FS) and SBA-15), were tested in the aqueous phase hydrodechlorination of the 4-chloro-2-methylphenoxyacetic acid (MCPA) herbicide. Pd catalysts showed higher activity than Rh and regarding the supports, the following sequence was found: Al2O3n+/Mo ratios between 0.7 and 1.7, showed higher activities. The most active catalysts of each series, the Al2O3-supported ones, showed a distribution of the metallic phase approaching an egg-shell configuration opposite to the rest. The Pd/Al2O3 catalyst, which was the most active, suffered a significant loss of activity upon the early stages on stream that could be ascribed to the formation of palladium chloride complexes as well as to deposition of species involved in the reaction.

UR - http://www.scopus.com/inward/record.url?scp=84954541066&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84954541066&partnerID=8YFLogxK

U2 - 10.1016/j.apcatb.2015.12.054

DO - 10.1016/j.apcatb.2015.12.054

M3 - Article

AN - SCOPUS:84954541066

SN - 0926-3373

VL - 186

SP - 151

EP - 156

JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

ER -

On the performance of Pd and Rh catalysts over different supports in the hydrodechlorination of the MCPA herbicide

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this