16 April Hotel Le Meridien New Delhi Latest Applications of GT-DWC
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
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 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) 9 Kyokuto 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)
Naphtha Splitter Typical Configuration for Gasoline Production Off Gas Off Gas ISOM Isomerate NHT Off Gas, LPG and Lights Gasoline Blending Reforming Reformate
NHT + Naphtha Splitter + Isomerization Unit Off Gas C 5 Recycle LPG Off Gas FRN Feed from NHT Reactor STABILIZER i-pentane DEISOPENTANIZER NAPHTHA SPLITTER ISOMERIZATION REACTOR STABILIZER C 5 Recycle DEPENTANIZER C 6 Isomerate DEISOHEXANIZER n- C 6 Recycle Heavy Naphtha n- C 6 Recycle NHT ISOM C 7 + Cut
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
GT-UWC for Stabilizer Columns Off Gas C 5 Recycle LPG Off Gas FRN Feed from NHT Reactor STABILIZER i-pentane DEISOPENTANIZER NAPHTHA SPLITTER ISOMERIZATION REACTOR STABILIZER C 5 Recycle DEPENTANIZER C 6 Isomerate DEISOHEXANIZER n- C 6 Recycle Heavy Naphtha n- C 6 Recycle NHT ISOM C 7 + Cut
STABILIZER Conventional Stabilizer Design Off Gas Drawbacks Operates at higher pressure Feed LPG Liquid losses to off gas due to partial condensation. Lights contamination of liquid overhead product High bottoms temperature Bottom Product
GT-UWC : Absorption and Distillation in the Same Column Off Gas Heavy Oil Feed Absorption Zone LPG 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. Bottom Product
GT-UWC : Absorption and Distillation in the Same Column Off Gas Other Off Gas Feed LPG 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 Bottom product is the absorbing medium Bottom Product
GT-DWC for Naphtha Splitter and Deisopentanizer Off Gas C 5 Recycle LPG Off Gas FRN Feed from NHT Reactor STABILIZER i-pentane DEISOPENTANIZER NAPHTHA SPLITTER ISOMERIZATION REACTOR STABILIZER C 5 Recycle DEPENTANIZER C 6 Isomerate DEISOHEXANIZER n- C 6 Recycle Heavy Naphtha n- C 6 Recycle NHT ISOM C 7 + Cut
GT-DWC Naphtha Splitter vs Conventional Scheme NHT Stabilizer Bottoms NAPHTHA SPLITTER C 5 Recycle Light Naphtha DEISOPENTANIZER i-pentane C 5 Recycle NHT Stabilizer Bottoms i-pentane GT-DWC NAPHTHA SPLITTER Light Naphtha Heavy Naphtha Light Naphtha Heavy Naphtha
GT-DWC Super Deisohexanizer for DP + DIH Off Gas C 5 Recycle LPG Off Gas FRN Feed from NHT Reactor STABILIZER i-pentane DEISOPENTANIZER NAPHTHA SPLITTER ISOMERIZATION REACTOR STABILIZER C 5 Recycle DEPENTANIZER C 6 Isomerate DEISOHEXANIZER n- C 6 Recycle Heavy Naphtha n- C 6 Recycle NHT ISOM C 7 + Cut
GT-DWC Super Deisohexanizer vs Conventional Scheme Feed from Isomerization Stabilizer DEPENTANIZER C 5 Recycle DEISOHEXANIZER C 6 Isomerate C 5 Recycle Feed from Isomerization Stabilizer GT-DWC SUPER DEISOHEXANIZER C 6 Isomerate n-c 6 Recycle to Isomerization Reactor n-c 6 Recycle to Isomerization Reactor C 7+ Cut C 7+ Cut
GTC s Advanced Distillation Configuration for Gasoline Production Off Gas from ISOM Stabilizer Off Gas C 5 Recycle LPG FRN Feed from NHT Reactor GT-UWC GT-DWC NAPHTHA SPLITTER i-pentane STABILIZER C 6 Isomerate ISOMERIZATION REACTOR GT-DWC SUPER DEISOHEXANIZER n-c 6 Recycle NHT Heavy Naphtha ISOM C 7 + Cut
NHT+ISOM - Advanced Distillation Scheme vs. Conventional Scheme Parameters Conventional 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
Naphtha Splitter Typical Configuration for Aromatics Production from Heavy Naphtha To ISOM unit Off Gas NHT Off Gas, LPG and Lights Lights Reforming PX Complex Benzene P-xylene Heavies
Block Flow Diagram NHT + Reformer + PX Complex Fuel Gas H2 C4- C5 Fuel Gas Heavy Naphtha REFORMER DEBUTANIZER C5+ DEETHANIZER LPG REFORMATE SPLITTER C6-C7 C9-C10 TRANS- ALKYLATION STABILIZER C8+ C6-C7 GT-BTX EXTRACTION Raffinate BENZENE Benzene C7 TOLUENE XYLENE C8 H2 CRYST-PX PX C7+ C8+ C9+ HEAVY XYLENE ISOM C11+
Application of GTC s Advanced Distillation Techniques to PX Complex Conventional Sequence can be improved by application of: GT-UWC SM (Uniting Wall Column) GT-DWC Benzene/Toluene Column GT-DWC Xylene Column (Top DWC)
DWC in Reformer Unit Gas Plant H2 C4- Fuel Gas C5 Fuel Gas Heavy Naphtha REFORMER DEBUTANIZER DEETHANIZER REFORMATE SPLITTER STABILIZER LPG C6-C7 C9-C10 TRANS- ALKYLATION C5+ C8+ C6-C7 GT-BTX EXTRACTION Raffinate BENZENE Benzene C7 TOLUENE XYLENE C8 H2 CRYST-PX PX C7+ C8+ C9+ HEAVY XYLENE ISOM C11+
GT-DWC Reformer Unit Gas Plant vs Conventional Scheme Fuel Gas Fuel Gas LPG Feed from Reformer DEBUTANIZER DEETHANIZER Feed from Reformer GT-UWC SM C5+ Cut LPG C5+ Cut
DWC for Benzene and Toluene Column Fuel Gas C5 H2 C4- Fuel Gas Heavy Naphtha REFORMER DEBUTANIZER C5+ DEETHANIZER LPG REFORMATE SPLITTER C6-C7 C9-C10 TRANS- ALKYLATION STABILIZER C8+ C6-C7 GT-BTX EXTRACTION Raffinate BENZENE Benzene C7 TOLUENE XYLENE C8 H2 CRYST-PX PX C7+ C8+ C9+ HEAVY XYLENE ISOM C11+
GT-DWC BT Column vs Conventional Scheme Benzene Benzene Feed BENZENE C7 Feed GT-DWC C7 TOLUENE C8+ CUT C8+ Cut
DWC for Xylene Column H2 C4- Fuel Gas C5 Fuel Gas Heavy Naphtha REFORMER DEBUTANIZER C5+ DEETHANIZER LPG REFORMATE SPLITTER C6-C7 C9-C10 TRANS- ALKYLATION STABILIZER STDP C8+ C6-C7 GT-BTX EXTRACTION Raffinate BENZENE Benzene C7 TOLUENE XYLENE C8 H2 CRYST-PX PX C7+ C8+ C9+ HEAVY XYLENE ISOM C11+
Conventional Xylene Distillation To CRYST-PX Multiple Feed Streams From STDP C8+ C8+ from Deheptanizer C8+ from Ref. Splitter C8+ from Toluene Col. XYLENE C9+ Cut Same Bottoms Product
GT-DWC Xylene Column : Segregation of overhead streams from different feed sources To CRYST-PX (Purification Stage) From STDP C8+ To CRYST-PX (Recovery Stage) C8+ from Deheptanizer C8+ from Ref. Splitter C8+ from Toluene Col. GT-DWC Offers CAPEX savings of over 20% C9+ Cut
Reformer and Aromatics Complex with DWCs Fuel Gas LPG C5 H2 Fuel Gas Heavy Naphtha REFORMER C5+ GT-UWC SM REFORMATE SPLITTER C6-C7 C9-C10 TRANS- ALKYLATION STABILIZER STDP C8+ Raffinate Benzene C8 to 2 nd Stage PX C6-C7 GT-BTX EXTRACTION GT-DWC Toluene GT-DWC C8 to 1 st Stage H2 CRYST-PX C8+ HEAVY XYLENE ISOM C9+ C11+
GT-DWC Configuration Performance Vs Conventional Scheme Parameters Conventional Reformer and PX Complex Reformer and PX Complex with GT-DWC No. of columns 8 6 OPEX Savings (%) - 30% CAPEX Savings (%) - 25%
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 multicomponent separation Advanced Distillation schemes can offer CAPEX and OPEX reduction of more than 40% by combining multiple unit operations and heat integration opportunities.