Magnetic Suspension Balance - Layout

Magneticsystem

Δζzp

Measuringload

decoupling

Sample

Zero-point position

Δζmp

Measuring-point position

Sensor core

Electromagnet

Permanent magnet

Magnetic Suspension Balance

Position trasducer

PID controller

Set-point controller

Control system

PID Modulates voltage on electromagnet to held the suspension magnet in vertical position

Position control system

Magnetic Suspension Balance

Cascade control

Set point Sample temperatureSet point resistance

Thermocouple value

Resistance value

Temperature control system

High temperature control:

Up to 500 °C

Magnetic Suspension Balance Temperature control system

Low temperature control:

Below Room temperatureUp to 100°C

Jacket

Sorption equipmentSorption equipment

Vacuum pump

burner

Gas chromatograph

8 Thermocouple

9 Pressure transducer ( 150 bar)

10 Pressure transducer ( 1000 mbar)

Gas inlet :

H2

CO

N2

Example of Sorption IsothermExample of Sorption Isotherm

2.34 bar

0.0

0.2

0.4

0.6

0.8

1.0

1.2

0 5 10 15 20 25 30 35 40 45 50

t 0̂.5 (s 0̂.5)

[M(t)

-M(0

)]/[M

(inf)-

M(0

)]

Step 2

PDMS-CO2 at 35°C

Legend:

Exp. Data

Fick law

Kinetics of Sorption

Sorption Isotherm

0

0.002

0.004

0.006

0.008

0.01

0.012

0.014

0.016

0.018

0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70

Pressure (Mpa)

Sol

ubilit

y (g

/g_p

ol)

Rubotherm Data (I)

Grazia's data

Rubotherm Data (II)

Other applications: Thermogravimetric analysis of polymers Other applications: Thermogravimetric analysis of polymers

Desorption 30°CHeating up to 120°C

Legend:

Study of water loss duringthe heating of Hyflon-Ion in hydrated state

88

90

92

94

96

98

100

0 20 40 60 80 100 120

1.2 %

0.9 %

m

olH

2O/m

olS

O3H

Wei

gth

loss

(%

)

Time (h) Temperature (°C)

Membrane fully hydrated 30°C

Evacuation at 30°C

Heating

Evacuation at 120°C

0

1

2

3

4

5