Latest Applications of GT-DWC®

16 April Hotel Le Meridien New DelhiGTC Technology Day

GTC Technology Day

Agenda

• GTC: The Trendsetter in implementing DWC technology

• Optimization of Process Complexes using GT-DWC®

− Gasoline Production (MS Block)

− Introducing GT-UWC℠ (Uniting Wall Column)

− Aromatics Production from Heavy Naphtha

GTC Technology Day

Advanced Distillation Technologies at GTC

• Distillation Processes are energy

intensive

• GTC’s Advanced Distillation

technologies can make substantial

reductions in energy consumption

and improve product quality.

GTC Technology Day

GTC’s DWC Experience – a Trendsetter in the Industry

No. Company Country Application

1 Dongying Yatong Petrochemical Co. China Benzene-Toluene Column (Middle DWC)

2 Al Barham Group of Companies Iraq NHT + Isomerization Unit (Top DWC and Middle DWC)

3 JG Summit Corporation Philippines Benzene-Toluene-Xylene Column (Bottom DWC)

4 GALP Energia Portugal Isomerization Unit – Deisopentanizer (Middle DWC)

5 Reliance Industries Ltd India Confidential Application

6 Shandong Sincier Petrochemical Co., Ltd. China Reformate Splitter (Top DWC)

7 Reliance Industries Ltd India Confidential Application

8 ALON USA, LP USA LPG Recovery (Top DWC)

9Kyokuto Petroleum Industries, Ltd. (TonenGeneral)

Japan Mix Xylene Recovery (Middle DWC)

10 PTT Global Chemical Company Ltd. Thailand BTX Separation (GT-ATCS)

11 Bharat Petroleum Corporation Ltd. India Isomerization Unit –Hexane Column (Top DWC)

Applications

of DWC in

Gasoline Production

(MS Block)

GTC Technology Day

GTC Technology Day

Typical Configuration for Gasoline Production

Nap

hth

a Sp

litte

r

Off Gas

Off Gas

Gasoline Blending

Off Gas, LPG

and Lights

NHT

ISOM

Reforming

Isomerate

Reformate

GTC Technology Day

NHT + Naphtha Splitter + Isomerization Unit

NHT ISOM

ISOMERIZATION

REACTOR

n- C6

Recycle

C7+ Cut

C5 Recycle

i-Pentane

Off Gas

C5 Recycle

C6 Isomerate

Heavy Naphtha

FRN Feed from

NHT Reactor

Off Gas

LPG

n- C6 Recycle

STABILIZER

NAPHTHA

SPLITTER

DEISOPENTANIZER

STABILIZER

DEPENTANIZER

DEISOHEXANIZER

GTC Technology Day

Application of GTC’s Advanced Distillation Techniques to Gasoline Production

Gasoline Production Sequence improved by application of:

• GT-UWC℠ (Uniting Wall Column)

• GT-DWC® Naphtha Splitter

• GT-DWC® Super Deisohexanizer

GTC Technology Day

GT-UWC℠ for Stabilizer Columns

NHT ISOM

ISOMERIZATION

REACTOR

n- C6

Recycle

C7+ Cut

C5 Recycle

i-Pentane

Off Gas

C5 Recycle

C6 Isomerate

Heavy Naphtha

FRN Feed from

NHT Reactor

Off Gas

LPG

n- C6 Recycle

STABILIZER

NAPHTHA

SPLITTER

DEISOPENTANIZER

STABILIZER

DEPENTANIZER

DEISOHEXANIZER

GTC Technology Day

Conventional Stabilizer Design

Drawbacks

• Operates at higher pressure

• Liquid losses to off gas due to partial

condensation.

• Lights contamination of liquid overhead

product

• High bottoms temperature

STA

BIL

IZERLPG

Bottom Product

Feed

Off Gas

GTC Technology Day

GT-UWC℠: Absorption and Distillation in the Same Column

Benefits

• Two unit operations (absorption &

distillation) in a single column.

• Lights are removed on feed side of

dividing wall by reboiled absorption.

• Top liquid product is separated from

heavies on the other side of dividing wall

via distillation.

LPG

Bottom Product

Feed

Off Gas

Heavy Oil

Absorption Zone

GTC Technology Day

GT-UWC℠: Absorption and Distillation in the Same Column

Advanced Feature

• Bottoms heavies product is used as absorption medium

(or)

• External heavier stream can be used as the absorption medium as well

• Higher LPG Recovery

• Lower Operating Pressure

• Lower Energy

LPG

Bottom Product

Feed

Off Gas

Bottom product is

the absorbing medium

Other

Off Gas

GTC Technology Day

GT-DWC® for Naphtha Splitter and Deisopentanizer

NHT ISOM

ISOMERIZATION

REACTOR

n- C6

Recycle

C7+ Cut

C5 Recycle

i-Pentane

Off Gas

C5 Recycle

C6 Isomerate

Heavy Naphtha

FRN Feed from

NHT Reactor

Off Gas

LPG

n- C6 Recycle

STABILIZER

NAPHTHA

SPLITTER

DEISOPENTANIZER

STABILIZER

DEPENTANIZER

DEISOHEXANIZER

GTC Technology Day

GT-DWC® Naphtha Splitter vs Conventional Scheme

Heavy Naphtha

Light Naphtha

NHT Stabilizer

Bottoms

i-Pentane

Light Naphtha

C5 Recycle

NAPHTHA

SPLITTERDEISOPENTANIZER

Heavy

Naphtha

NHT Stabilizer

Bottoms

i-Pentane

Light Naphtha

C5 Recycle GT-DWC® NAPHTHA SPLITTER

GTC Technology Day

GT-DWC® Super Deisohexanizer for DP + DIH

NHT ISOM

ISOMERIZATION

REACTOR

n- C6

Recycle

C7+ Cut

C5 Recycle

i-Pentane

Off Gas

C5 Recycle

C6 Isomerate

Heavy Naphtha

FRN Feed from

NHT Reactor

Off Gas

LPG

n- C6 Recycle

STABILIZER

NAPHTHA

SPLITTER

DEISOPENTANIZER

STABILIZER

DEPENTANIZER

DEISOHEXANIZER

GTC Technology Day

GT-DWC® Super Deisohexanizer vs Conventional Scheme

C6 Isomerate

C7+ Cut

Feed from

Isomerization

Stabilizer

n-C6 Recycle

to Isomerization

Reactor

C5 Recycle

GT-DWC® SUPER

DEISOHEXANIZER

C7+ Cut

C5 Recycle C6 IsomerateFeed from

Isomerization

Stabilizer

n-C6 Recycle

to Isomerization

Reactor

DEPENTANIZER

DEISOHEXANIZER

GTC Technology Day

GTC’s Advanced Distillation Configuration for Gasoline Production

C7+ Cut

C6 Isomerate

n-C6 Recycle

Heavy Naphtha

i-Pentane

NHT ISOM

Off Gas from ISOM Stabilizer

Off Gas

LPG

FRN Feed

from NHT

Reactor

ISOMERIZATION

REACTOR

C5 Recycle

GT-DWC® SUPER

DEISOHEXANIZER

STABILIZER

GT-DWC®

NAPHTHA

SPLITTER

GT-UWC®

GTC Technology Day

NHT+ISOM -Advanced Distillation Scheme vs. Conventional Scheme

ParametersConventional NHT + ISOM

NHT + ISOM with GT-DWC®

No. of columns 6 4

OPEX Savings (%) - 24 %

CAPEX Savings (%) - 30%

Applications of DWC

in Reformer and

Aromatics Complex

GTC Technology Day

GTC Technology Day

Typical Configuration for Aromatics Production from Heavy Naphtha

Nap

hth

a Sp

litte

r

Off Gas

Off Gas, LPG

and Lights

P-xylene

NHT

ReformingPX

Complex

To ISOM unit

Benzene

Lights

Heavies

Block Flow Diagram – NHT + Reformer + PX Complex

GTC Technology Day

Fuel Gas

TRANS-ALKYLATION

REFORMER

H2

C5+

C9+

C8

C9-C10

C4-

XYLENE ISOM

H2

LPG

Fuel Gas

Benzene

C11+

CRYST-PX

PXRaffinate

GT-BTX EXTRACTION

C6-C7

C8+

Heavy Naphtha

DEBUTANIZER

DEETHANIZER

C5

REFORMATE

SPLITTER

BENZENE

COLUMNTOLUENE

COLUMN

STABILIZER

HEAVY

COLUMN

C7XYLENE

COLUMN

C7+

C6-C7

C8+

GTC Technology Day

Application of GTC’s Advanced Distillation Techniques to PX Complex

Conventional Sequence can be improved by application of:

• GT-UWCSM (Uniting Wall Column)

• GT-DWC® Benzene/Toluene Column

• GT-DWC® Xylene Column (Top DWC)

GTC Technology Day

DWC in Reformer Unit Gas PlantFuel Gas

TRANS-ALKYLATION

REFORMER

H2

C5+

C9+

C8

C9-C10

C4-

XYLENE ISOM

H2

LPG

Fuel Gas

Benzene

C11+

CRYST-PX

PXRaffinate

GT-BTX EXTRACTION

C6-C7

C8+

Heavy Naphtha

DEBUTANIZER

DEETHANIZER

C5

REFORMATE

SPLITTER

BENZENE

COLUMNTOLUENE

COLUMN

STABILIZER

HEAVY

COLUMN

C7XYLENE

COLUMN

C7+

C6-C7

C8+

GTC Technology Day

GT-DWC® Reformer Unit Gas Plant vs Conventional Scheme

Feed from

Reformer

LPG

Fuel Gas

C5+ Cut

DEBUTANIZER

DEETHANIZER

Feed from

Reformer

Fuel Gas

LPG

C5+ Cut

GT-UWCSM

GTC Technology Day

DWC for Benzene and Toluene ColumnFuel Gas

TRANS-ALKYLATION

REFORMER

H2

C5+

C9+

C8

C9-C10

C4-

XYLENE ISOM

H2

LPG

Fuel Gas

Benzene

C11+

CRYST-PX

PXRaffinate

GT-BTX EXTRACTION

C6-C7

C8+

Heavy Naphtha

DEBUTANIZER

DEETHANIZER

C5

REFORMATE

SPLITTER

BENZENE

COLUMNTOLUENE

COLUMN

STABILIZER

HEAVY

COLUMN

C7XYLENE

COLUMN

C7+

C8+

C6-C7

GTC Technology Day

GT-DWC® BT Column vs Conventional Scheme

Feed

C8+ Cut

Benzene

C7

BENZENE

COLUMN

TOLUENE

COLUMN

Feed

Benzene

C7

C8+ CUT

GT-DWC®

COLUMN

GTC Technology Day

DWC for Xylene ColumnFuel Gas

TRANS-ALKYLATION

REFORMER

H2

C5+

C9+

C8

C9-C10

C4-

XYLENE ISOM

H2

LPG

Fuel Gas

Benzene

C11+

CRYST-PX

PXRaffinate

GT-BTX EXTRACTION

C6-C7

C8+

Heavy Naphtha

DEBUTANIZER

DEETHANIZER

C5

REFORMATE

SPLITTER

BENZENE

COLUMNTOLUENE

COLUMN

STABILIZER

HEAVY

COLUMN

C7XYLENE

COLUMN

C7+

C8+

C6-C7

STDP

GTC Technology Day

Conventional Xylene Distillation

To CRYST-PX

C9+ Cut

XYLENE

COLUMNC8+ from Ref. Splitter

C8+ from Toluene Col.

C8+ from Deheptanizer

From STDP C8+Multiple Feed

Streams

Same Bottoms Product

GTC Technology Day

GT-DWC® Xylene Column : Segregation of overhead streams from different feed sources

To CRYST-PX(Recovery Stage)

C9+ Cut

C8+ from Ref. Splitter

C8+ from Toluene Col.

C8+ from Deheptanizer

From STDP C8+

To CRYST-PX(Purification Stage)

GT-DWC®

COLUMN

Offers CAPEX savingsof over 20%

GTC Technology Day

Reformer and Aromatics Complex with DWCsFuel Gas

TRANS-ALKYLATION

REFORMER

H2

C5+

C9+

C8 to 1st Stage

C9-C10

XYLENE ISOM

H2

LPGFuel Gas

Benzene

C11+

CRYST-PX

PXRaffinate

GT-BTX EXTRACTION

C6-C7

C8+

Heavy Naphtha

GT-UWCSM

GT-DWC®

COLUMN

STABILIZER

HEAVY

COLUMN

Toluene GT-DWC®

COLUMN

C5

REFORMATE

SPLITTER

C8+

C6-C7

C8 to 2nd Stage

STDP

GTC Technology Day

GT-DWC® Configuration Performance Vs Conventional Scheme

ParametersConventional

Reformer and PX Complex

Reformer and PX Complex

with GT-DWC®

No. of columns 8 6

OPEX Savings (%) - 30%

CAPEX Savings (%) - 25%

GTC Technology Day

Summary

• Unconventional distillation applications are an overlooked means to

reduce refinery energy consumption

• GT-DWC® reduces 20–30% OPEX through energy savings

• GT-DWC® reduces 20–30% CAPEX by requiring a single column for multi-

component separation

• Advanced Distillation schemes can offer CAPEX and OPEX reduction

of more than 40% by combining multiple unit operations and heat

integration opportunities.

GTC Technology Day