Innovative Routes for Maximizing Paraxylene Production ... · Bottom-of-the Barrel Conversion with Commercially Proven Technologies Innovative Routes for Paraxylene Production Christian

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Delphine Le-Bars

Maximizing Bottom-of-the Barrel

Conversion with Commercially Proven Technologies

Innovative Routes for Paraxylene Production

Christian Dupraz

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1. Context

2. Solutions to Meet Increased Demand for Paraxylene

Increase Naphtha Production from Crude Oil

Implement New Breakthrough Technology Using

Alternate Low-cost Feedstock

Agenda

WRA - Egypt Downstream Summit, 2016

3

1. Context





Agenda


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Market Trend:

Maximize Heavy Naphtha Production from

crude oil

Increase in Aromatics

Production

+ 6.4% in PX Capacity

for 2014-2020


World Paraxylene Capacity, Production and Utilization Rate 2011-2020

PETROCHEMICALS

Implement new breakthrough technology using

alternate low-cost feedstock

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1. Context





Agenda


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RFCC

HS-FCC

Bottom-of-the-Barrel Configuration Overview

AR

VR ARDS / VRDS

VGO

FCC Pretreat

Mild HCK

SDA EB Distillate

HCK

FCC

HS-FCC

HCK

VB

Delayed

Coker

Crude

Oil

Ebullated Bed Resid HCK

Slurry HCK


DHDT

CDU

GAS PLANT

Diesel

VDU

Bz / PX

C2= / C3= LPG

Light

Naphtha

Heavy

Naphtha

Jet

Diesel

Fuel

Oil

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Reliability is key for

economics viability

How to Increase Naphtha Production?

Aromatic Complex

Residue

Conversion

Complex

Diesel

HDT

VGO

Hydrocracker

Naphtha

Middle Distillate

Kero

Diesel

UCO

Selection of Scheme/

Catalytic System for

Naphtha Maximization

Selection of a

Technology

Providing Maximum

Conversion and

Potential for HN

Production

Partial

Cracking of

Middle

Distillate Cut to

Naphtha

Selection of Light Crude

to Maximize Straight Run Naphtha A

DU

VD

U

VGO Atmospheric

Residue

Vacuum

Residue

Diesel

Fuel Oil

pX

Benzene

Middle

Distillate

VGO

Naphtha

Naphtha

Crude

Oil


PETROCHEMICALS

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Vacuum Residue (VR) Feedstock

• Conversion into valuable products

› Naphtha, Diesel, VGO

• Unconverted Residue (UCO)

› Low Sulfur & Stable Fuel Oil

› Feed for Coker, SDA, Boilers or Gasification

Axens H-Oil®RC Residue HydroCracking Feedstock


High Value Products

UCO is a Liquid Fuel

Various Options for UCO Outlet

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Axens H-Oil®RC Residue HydroCracking Principles


H2 + Feed

Catalyst Addition

Ebullated Bed

Ebullating Pump

Recycle Oil Catalyst Withdrawal

Robustness

Flexibility

Inter-stage

Separator

Ebullated-Bed Reactor

• Three-phase backmixed system

with Internal Liquid Recycle to

Expand Catalyst Bed

• Nearly Isothermal Reactor

• Low & Constant Pressure Drop

• Daily Addition/Withdrawal of

Catalyst

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Superior Reliability

Avg. 96.6%


Availability of H-Oil® Units (2001-2010/2013)

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H-Oil® & Solvent DeAsphalting Process (SDA) Combination

Combination of H-Oil® & Solvahl™ (SDA)

Option is to use SDA to eliminate remaining Asphaltenes

and further process DAO to increase conversion

Stability is the limiting factor due

to Asphaltenes condensation

0% 28% 48% 56% 74% 85%

With increased

conversion in Residue

HCK alone

540+ Conversion, wt%


12 WRA - Egypt Downstream Summit, 2016

H-Oil® Reactor

SolvahlTM

H-Oil® Reactor

Scheme Optimization

Tailored option to meet target depends on:

• Project Objective

• Products Requirement

• Feedstocks

• Site constraints

H-Oil® & Solvahl™ Combination Options

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Conventional VR Feeds

› Middle East, Ural, etc.

Maximum Conversion

› Petrochemical application

› Middle Distillates production

H-Oil® & Solvahl™ Combination Example

UCO: Unconverted Oil

DAO: Deasphalted Oil

CFB: Circulating Fluidized Bed

Feedstock well suited for H-Oil®RC

High conversion in stand-alone H-Oil®RC

Up to 80 wt%

VR Conversion = 90wt%


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How to Increase Naphtha Production?

Aromatic Complex

Residue

Conversion

Complex

Diesel

HDT

VGO

Hydrocracker

Naphtha

Middle Distillate

Kero

Diesel

UCO

Selection of Scheme/

Catalytic System for

Naphtha Maximization

Selection of a

Technology

Providing Maximum

Conversion and

Potential for HN

Production

Partial

Cracking of

Middle

Distillate Cut to

Naphtha

Selection of Light Crude

to Maximize Straight Run Naphtha A

DU

VD

U

VGO Atmospheric

Residue

Vacuum

Residue

Diesel

Fuel Oil

pX

Benzene

Middle

Distillate

VGO

Naphtha

Naphtha

Crude

Oil


PETROCHEMICALS

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Two-Stage

Once-Through

HyKTM Hydrocracking Schemes - Flexibility

Main Product Yield

- Investment Cost +

Once-Through

With Recycle

Yield, wt%

HN ~ 30

MD 40-45

UCO 15

Yield,

wt%

With MD

Production

without

MD

Production

HN ~ 40 65-70

MD 40-45 -

UCO <1 <1


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Maximization of Naphtha Production

Maximum Density Decrease and Cetane Improvement

through ring opening

Possibility of Upgrading Difficult Feedstocks such as

LCO from FCC and/or LCGO from Coker

Diesel Cut Hydrocracking


Catalyst Application

• High pressure

• High aromatic sat.

• Ring opening

• ULSD

• Maximum ∆ cetane/spgr

• Maximum volume swell

• Naphtha Production

NiMo

Cracking

Catalyst

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1. Context





Agenda


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Aromatics Complex Historical Configuration


Aromatics Rings

Generation

NHT & Aromizing

Rings & Methyl Groups

Rearrangement

Transalkylation Loop

Xylenes Conversion to

Paraxylene

Xylenes Loop

PX

Naphtha

Aro

mati

cs

Fra

cti

on

ati

on

Secti

on

BZ

BZ + TOL

C9A+

C8A

C8A

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EMTAM ParamaX® Complex Transalkylation Scheme Principles

Aromatics Rings

Generation

NHT & Aromizing

Toluene Methylation

EMTAM Loop

Xylenes Conversion to

Paraxylene

Xylenes Loop

PX

Naphtha

Aro

mati

cs

Fra

cti

on

ati

on

Secti

on

C8A

TOL

MeOH C8A

BZ & C9A+

Transalkylation C9A+ TOL

BZ

C8A


Naphtha consumption

reduced by 30%!

Transalkylation yields more

Toluene to EMTAM and more

C8A to Xylenes Loop

Larger PX rich C8A’s further

reduces Xylenes Loop

CAPEX & OPEX

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EMTAM ParamaX® Complex Broader Picture Crude to PX Complex

Crude

VR Conversion

H-Oil®

SR & Cracked

GOs Conversion

Hydrocracking

SR & Cracked

Naphthas

Hydrotreatment

Aromatics

Rings

Generation

Aromizing Toluene

Methylation

EMTAM Loop

Xylenes

Conversion to

Paraxylene

Xylenes Loop

PX

Aro

ma

tic

s F

rac

tio

na

tio

n

Se

cti

on

C8A

TOL

MeOH

C8A

BZ & C9A+

Transalkylation C9A+ TOL

BZ

C8A

SRN

SR GO

SR VGO

VR H-Oil GO

HCK N

H-Oil N


Naphtha requirement

reduced by 30%!

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Axens is offering a complete solution

for maximum production of Naphtha

for Aromatic Complex

• Solution with only proven and reliable

technologies

• High Stream Factor demonstrated

• Top Tier Catalysts for all applications

• Axens is the 1st Licensor to be awarded a

Full Integrated Scheme from VR to PX

New breakthrough technology to

enhance PX production

Conclusion


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Innovative Routes for Maximizing Paraxylene Production ... · Bottom-of-the Barrel Conversion with Commercially Proven Technologies Innovative Routes for Paraxylene Production Christian

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