Advancements in Gas Chromatography Analyzers - Keeping up with New Technology
Chuck Runkle Gas Phase Product Specialist ASTS June 2013
Capillary Flow Technology -- solves difficult application problems easily & opens up many new (and old) possibilities for GC & GC/MS
– Column connections (connect pre-column) – Change MSD columns (without venting) – Backflush (Reverse flow through column) – Deans switch (heart cut select peaks to 2nd column) – Detector splitter (effluent split to two or more detectors) – Merge flows (2 columns to 1 MSD) – Comprehensive 2-D GC (cut all peaks to 2nd column) – etc.
Agilent 7890-0322 Fast Refinery Gas Analyzer What is a Fast Refinery Gas Analyzer • 7890 GC is designed to analyze refinery gas in under 6 min. • The system has 5 valves and three detectors. • The FID is for measuring hydrocarbons from C1 to C5 while C6/C6+
components are back-flushed and measured as a single peak at the beginning of the analysis.
• The first TCD is configured with helium carrier gas to analyze permanent gases (CO2, CO, O2, N2).
• The second TCD is configured with nitrogen carrier gas to analyze hydrogen. This detector is mounted on the side of the instrument.
Agilent 7890-0322 Fast Refinery Gas System Three Channel System for Analysis of Hydrogen, Permanent Gases and Hydrocarbon Analysis
Side
Back
Front Front Inl
Back Inl
Back Aux
TCD
FID
(220)
(210)
TCD(221)
Front
(112)CAPEPC
PCM CCh 1
Ch 2
PCM BCh 1
Ch 2
1 23
4567
8
910Sample
In
Out
Loop
Vent 12
34
5
6LOOP
860 874
1 23
4567
8
910Sample
In
Loop
Vent
12
34
5
61
2
34
5
6
Col 1
Col 2
Col 3
Col 4
Col 5
Col 6
Col 7
Col 8
25ul250 ul100 ul
The design looks complicated, but it is really just three separate channels. Each channel by itself is very simple. Lets break it down.
Agilent Fast Refinery Gas Analyzer Utilizes Four Types of Rotary Valves
12
34
5
6
IN
OUTSAMPLE
LOOP
12
34
5
61
2
34
5
6
1 23
4567
8
910Sample
In
Out
Loop
Vent
6-port GSV (Opt 701) 10-port GSV with pre-column back-flush to
vent (Opt 801)
6-port column isolation valve (Opt 702)
6-port sequence reversal with pre-column back-flush
to detector (Opt 708)
- Valves are always depicted in the OFF position unless otherwise noted
Agilent 7890-0322 Fast Refinery Gas System Three Gas Sample Valve Loops in Series
1 23
4567
8
910Sample
Out
Loop
12
34
5
6LOOP
1 23
4567
8
910Sample
In
Loop25ul250 ul100 ul
• There are three gas sample valves, one for each channel. • Sample flows in through a single 1/16” tube and fills the gas sample loop
for each valve before injection. • All three channels are injected simultaneously. • All channels analyze in parallel after injection.
Hydrogen Channel Permanent Gas Channel
Hydrocarbon Channel
Agilent 7890-0322 Fast Refinery Gas System Hydrogen Analysis: Back-flush
Side
Back Aux
TCD(221)
PCM CCh 1
Ch 21 2
3
4567
8
910
Loop
Vent
100 ul
Hayesep Q
MolSieve
Sample In
Sample Out
• The valve is turned to the OFF position after hydrogen has eluted to the Molsieve column.
• Hydrogen is separated from helium on the MolSieve and analyzed on the TCD
• All permanent gases and hydrocarbons are back-flushed from the Hayesep column to vent.
Agilent 7890-0322 Fast Refinery Gas System Permanent Gas Analysis: Sample Load
BackBack Inl
TCD(220)
PCM BCh 1
Ch 2
1 23
4567
8
910
Loop
Vent
12
34
5
6
250 ul
Unibead
Unibead
MolSieve
Sample In
Sample Out
Agilent 7890-0322 Fast Refinery Gas System Hydrocarbon Analysis
Front Front Inl
FID(210)
Front
(112)CAPEPC
12
34
5
6LOOP
860 874
12
34
5
6
25ul
2M 5um DB-1
25M 8um HP-AL/S
Agilent Fast Refinery Gas Analyzer 3 Channels of Data in under 6 minutes
FID: Hydrocarbons
TCD1: Permanent Gases
TCD2: Hydrogen
Universal Capillary Nat Gas Solution Value to Customers Features of the Universal Nat Gas Solution
• Can be configured with both LSV and GSV for both liquid and gas injections • The FID channel is configured with a 6-port backflush valve and a DB-1 60m x
0.25mm x 1.0um – This channel can be configured for either a C6+ backflush or an extended
analysis simply through a method change. • TCD channel is equipped with a Deans Switch configured with a PLOT Q capillary
column and a Molsieve column. The columns from the Deans Switch are teed into a single TCD to give a more compact analysis. – This channel can be configured to either separate oxygen and nitrogen or to
report a N2/O2 composite, simply through a method change. • H2S can be analyzed on the PLOT Q TCD channel.
– If the user needs high level H2S the system could be ordered with Hastelloy valves and Nickel tubing.
Universal Capillary Nat Gas Solution Review Value to Customers • We currently have 15 natural gas analyzers • These systems all revolve around a matrix of 5 variables
– Extended Analysis – Hydrogen Capacity – O2/N2 separation – High H2S – Liquefied Samples
• We have the ability to configure one instrument based on CFT that can be configured around 4 of the 5 nat gas variables. This system will not analyze for hydrogen.
• We do not see a big need for hydrogen analysis in the nat gas industry and if a customer needs this, they can order a refinery gas system.
Universal Capillary Nat Gas Solution
860
Order No : Universal NGA
Date : 2/5/2012
Remarks
FLOWSOURCE
INJECTIONPORT
VALVE COMPARTMENT
BLOCK 2 BLOCK 1DETECTOR
S/N :
Item :
Options
OVEN LEFT SIDE
Valve System
SP1 options
Back Inl Back
1/800/502/504
2/708/5x8723/XXX
4/XXX5/852/861
6/850/861
= #87X
Front
(112)CAP
(112)CAPEPC
Front
FID(210)
Front Aux
Front Inl
EPC
7890-0990,7890-0020,7890-0999
2x112, 210, 220, 301, 305, 306, 502, 504, 708, 752, 800, 850, 852 860, 2x861, 5x872, 874, 888, 19095P-QO4PT, 19095P-MS0E,
160-2255-10, 123-1036, 160-2535-5
Col 1: HP-PLOT Q PT, 19095P-QO4PT, 30m x 0.53mm x 40umCol 2: HP-PLOT Molsieve, 19095P-MS0E, 30m x 0.53mm x 30 umCol 3: Restrictor, FST, 160-2255-10, (cut to 1.5m), 5m x 0.250mm Col 4: DB-1, 123-1036, (2m cut), 60m x 0.25mm x 1.0 umCol 5: DB-1, 123-1036, (58m cut), 60m x 0.25mm x 1.0 um
AUX 23
1
Col 1
Col 2
1 23
4567
8
910
1.0 mLLoop
0.25 mLLoop
Sample In Sample Out
7890-0020 888P
S
R 1
3
21
3
Back
TCD(220)
Col 3
12
34
5
6
Col 5
Col 4
874
CWPS
INSAMPLE
CWPS
OUT
SAMPLE
G31
84-6
0065
0.53mm FSOT transfer line
0.25mm x 5m FSOT transfer line
Universal Capillary Nat Gas Solution Review Example Chromatogram from FID Channel 79% Hexanes LPG Injection, Extended Analysis
Capillary Flow Technology -- solves difficult application problems easily & opens up many new (and old) possibilities for GC & GC/MS
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