BU Platinum Engineered Materials · 20 25 30 35 40 400 600 800 1000 1200 1400 temperature [°C] rel. NO x selectivity Pt Pd Rh LP/MP reactors HP reactors. 10 Combining Competencies

(relevant picture)

BU Platinum Engineered Materials

Process ExcellenceModel

Combining Competencies for Process Excellence

Highperformancesystemsforammoniaoxidationreactors

ANNA 2009 – Little Rock

Combining Competencies for Process Excellencein chemical industries

Contents

1. Catalyst gauzesMKS preciseMKS precise

2. Getter for high loaded reactorsReconitReconit

3. N2O abatementMultiCombMultiComb GreenLineGreenLine®®


1. Catalyst gauzes

MKS preciseMKS precise

2. Getter gauzesfor high loaded reactors

ReconitReconit

3. N2O abatement

MultiCombMultiComb GreenLineGreenLine®®


5Combining Competencies for Process ExcellenceOctober 2009 ©Umicore

Catalyst gauzesMKS precise

knitting machine

Modern Knitting Technology

flat bed technology + single piece production

• production flexibilitylike no other player in the market

• adjusting and finetuningeach single gauze

• short production lead timeshort reaction time



variations of PLATINIT® gauzes

PLATINIT® = single layer gauze

• 4 different basis types

• different porosities

• finetuned by: - alloy composition- wire diameter- surface weight



variations of MULTINIT® gauzes

MULTINIT® = multi layer gauze

• 3 different basis types

• three-dimensional, replacing 3 PLATINIT®

• alternating porosities within the gauzebeneficial impact on primary losseslong lifetime



• combination of Pt/Rh-PLATINIT® and MULTINIT®

• each gauze is adjustedto its position in the packand the application parameters

• each configuration is customized

•Highest efficiency•Highest process stability•Longest operating time•Lowest amount of installed PM•Lowest PM losses

MKS classic



How does the selectivity of the single components

depend on the operating temperature?

05

10152025303540

400 600 800 1000 1200 1400temperature [°C]

rel.

NO

x sel

ectiv

ity

Pt Pd

Rh

LP/MP reactors HP reactors



feed gas flowT ≈ 200°C

product gas flowT ≈ 900°C

catalystgauzepack

Is this transferableto configurating the catalyst packs?

gas temperature increasesin the gauze pack

high temperature in the bottom part

lower temperature in the top part

Using the advantages ofRh (stability) and Pd (recovery)in the different gauze layers !



• adaptability of MKS classiccompleted by using different alloysin different gauze layers,due to single piece production

• higher efficiency

• higher stability

• decreased PM losses

• decreased installation value

MKS precise

1. Catalyst gauzes

MKSMKS


ReconitReconit

3. N2O abatement




Getter gauzes for high loaded reactorsReconit

Standard woven getter gauzes

• new getter gauze • used getter gauze (30:1) • used getter gauze (300:1)

lowporosity

Pt/Rhrecovery

growth ofwire diameter

increasingpressure drop



Standard woven getter gauzes

high loaded reactors: extensively increasing pressure drop,

due to high primary losses

operation stops to remove/exchange getter system

production loss / unrecovered Pt/Rh losses

REQUIREMENT:

getter gauze system with high recovery rate and

low pressure drop increase



Reconit

• knitted and three dimensional

• gauze height: 2,5 mm

• high porosity (> 90%)

• dense from top view due to weft wire



0102030405060708090

100

0 20 40 60 80 100

operating time [days]

pres

sure

dro

p [m

bar]

0102030405060708090100

poro

sity

[%]

Δp Reconit

porosity Reconit

Δp woven

porosity woven

1. Catalyst gauzes

MKSMKS


ReconitReconit

3. N2O abatement




N2O abatementMultiComb GreenLine®



Examples of Industrial Installations of MultiComb MultiComb GreenLineGreenLine®®

40 %65 %1003,2317,53.

4.

2.

1. 85 %85 %502,1165,5

75 %

70 %

[%]

N2O abatement

[% per 50 mm layer]

6,4

9,9

pressure[bar (abs.)]

installation height[mm]

v[m/s]

load[tN(NH3)/day*m2]

30 %2005,546

45 %1001,823

40 %65 %1003,2317,53.

4.

2.

1. 85 %85 %502,1165,5

75 %

70 %

[%]

N2O abatement

[% per 50 mm layer]

6,4

9,9

pressure[bar (abs.)]

installation height[mm]

v[m/s]

load[tN(NH3)/day*m2]

30 %2005,546

45 %1001,823



Characteristics of MultiCombMultiComb GreenLineGreenLine®®

• even structure stable gauze support

uniform pressure drop

• Iron Oxide as essential part of the active component

• hexagonal shape high mechanical stability and

thermal shock resistance

• fully extruded no agglomeration or abrasion

of active component

stable efficiency



Pressure Drop

0

5

10

15

20

25

30

35

0,5 1 1,5 2 2,5 3 3,5 4 4,5 5 5,5 6

gas velocity [m/s]

pres

sure

dro

p [m

bar/c

m]

filling rings 5x5 mm,1.000 m2/m3

air900 °C1 bar (abs.)

1.730 m2/m3

1.730 m2/m3


0

10

20

30

40

50

60

70

80

800 820 840 860 880 900 920operating temperature [°C]

N 2O

aba

tem

ent [

%]


Modified active component

much more active especially at low operating temperatures

(relevant picture)

THANK YOU !

Mathias Schlettphone +49 6181 59 [email protected]

BU Platinum Engineered Materials

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BU Platinum Engineered Materials · 20 25 30 35 40 400 600 800 1000 1200 1400 temperature [°C] rel. NO x selectivity Pt Pd Rh LP/MP reactors HP reactors. 10 Combining Competencies