TRICATs XpresS Pre-sulfiding Process The Benefits of True Ex-situ - - PowerPoint PPT Presentation

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TRICATs XpresS Pre-sulfiding Process The Benefits of True Ex-situ - - PowerPoint PPT Presentation

Mar 13, 2023 39 likes •214 views

TRICAT TRICATs XpresS Pre-sulfiding Process The Benefits of True Ex-situ Pre-sulfiding Conventional In-situ Sulfiding Gas or Liquid Phase Using Sulfiding Agent Sulfiding Reactions 3NiO + 2H 2 S + H 2 Ni 3 S 2 + 3H 2 O 9CoO + 8H 2 S +

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SLIDE 1

TRICAT’s XpresS Pre-sulfiding Process

The Benefits of True Ex-situ Pre-sulfiding TRICAT

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SLIDE 2

Conventional In-situ Sulfiding

Gas or Liquid Phase Using Sulfiding Agent Sulfiding Reactions

3NiO + 2H2S + H2 Ni3S2 + 3H2O 9CoO + 8H2S + H2 Co9S8 + 9H2O MoO3 + 2H2S + H2 MoS2 + 3H2O WO3 + 2H2S + H2 WS2 + 3H2O TRICAT

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SLIDE 3
  • Time Consuming and Often Results in

Unexpectedly Poor Performance

  • Exothermic Reactions
  • Yields Large Quantities of Water
  • Sulfiding Agents Can Be Toxic,

Flammable, Odorous

Conventional In-situ Sulfiding

Problems

TRICAT

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SLIDE 4

XpresS Pre-sulfiding

Features

True Ex-situ Pre-Sulfiding Sulfiding in Ebullated Bed Reactor Catalyst Stabilized via Patented Gas

Treatment

TRICAT

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SLIDE 5
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SLIDE 6

“XpresS”

Benefits vs. In Situ Sulfiding

Homogeneously Sulfided, Odor-Free

Catalyst

No External Sulfur Supply or Addition

System Required

Minimal Reactor Exotherms at Start-up No Water Release Greatly Reduced Start-up Time

TRICAT

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SLIDE 7

“XpresS”

Benefits vs. Pre-Sulfurizing

Minimal Reactor Exotherms at Start-up in

gas or liquid phase

No Temperature Holds Minimal H2 Consumption during Heat-up No Product Recycle due to Discoloration No Water Release Reduced Start-up Time

TRICAT

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SLIDE 8

Pre-Sulfiding Step Benefits of XpresS Process

Sulfiding Medium: H2S/H2

  • Absence of carbon containing compounds (eg. DMDS)

eliminates coking

Ebullated Bed Operation

  • Optimizes Solid/Gas mixing
  • Eliminates concerns about H2 reduction due to

breakthrough

  • Permits high temperature sulfiding to maximize activity

Minimal H2S evolution during heat-up

  • Protects sensitive catalysts upstream or downstream of

reactor

TRICAT

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SLIDE 9

Passivation Step Benefits of XpresS Process

Passivation process works by converting surface

sites from metal sulfide to stable oxysulfide state

Use of gaseous passivation step avoids use of

smelly, difficult-to-handle hydrocarbon coating

Ebullated bed also ensures that each particle is

treated uniformly and that H2S is effectively removed from pores TRICAT

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SLIDE 10

Reactivation Step Activity Enhancement with XpresS

Once loaded, stabilized catalyst completes

activation with H2S evolved during feed processing.

Literature strongly suggests that sulfiding/gas

passivation/re-activation enhances activity of the sulfided catalyst by decreasing metal-support interactions. TRICAT

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SLIDE 11

The XpresS Start-up

Catalyst is dry and free-flowing. Loading in air or

inert.

No external sulfur supply required. No high temperature exotherms. Liquid or gas phase heat-up. If gas phase heat-up, introduce feed at normal

  • perating temperature.

TRICAT

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SLIDE 12

Recent Commercial XpresS Start-Up

Belgian Refining Corp.

  • TRI CAT supplied regenerated/ XpresS pre-sulfided

catalyst to refinery.

  • Catalyst dense loaded into distillate HDT unit w/ N2
  • purge. No exotherms experienced during loading.
  • Unit heat up in gas phase with circulating H2 to 230°C

with only minor exotherm at H2 introduction.

  • Refiner reported:
  • Turnaround length halved from 12 to 6 days through

TRI CAT initiatives.

  • Greatly simplified start-up versus in-situ sulfiding or

earlier pre-sulfurized catalysts.

  • ~ 10°C lower SOR temp than previous cycle.

TRICAT

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SLIDE 13

Belgian Refining Corp. #2 HDS Unit XpresS Start-Up Temperature Profile June 1999

50 100 150 200 250 300 350

  • 1

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Time, Hours Reactor Temperature, Deg C

Reactor Inlet Reactor Outlet

Begin H Circulation 2 Introduce Feed

TRICAT

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SLIDE 14

Belgian Refining Corp. #2 HDS Unit Pre-Sulfurized Catalyst Start-Up Temperature Profile April 1997

50 100 150 200 250 300 350

  • 1

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Time, Hours Reactor Temperature, Deg C

Reactor Inlet Reactor Outlet

Begin H Circulation 2 Introduce Feed

TRICAT

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SLIDE 15

Catalyst Deactivation Rate

300 320 340 360 380 400 420 440 5 10 15 20 25

Feed Processed, cu m per kg cat

Normalized Temperature to Achieve 500 ppm Sulfur, Deg C

Previous Cycle Current Cycle

TRICAT

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SLIDE 16

XpresS Users

  • Bayern (BP Affiliate)
  • Agip
  • Shell
  • BP – Hamburg
  • ExxonMobil
  • OMV
  • PCK
  • Veba
  • Wilhelmshavener Raffinerie
  • Belgian Refining Corp.
  • DEA
  • Erdoelchemie
  • TotalFinaElf
  • Universal Refining
  • Idemitsu Kosan (Japan)
  • Ultramar Diamond Shamrock (US)
  • INA
  • Synetix
  • Haldor Topsoe
  • Procatalyse
  • Miro

TRICAT

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SLIDE 17

XpresS Pre-Sulfiding

Conclusions

Quality - XpresS Provides Refiner With

True Pre-Sulfided Catalyst

Convenience - Eliminates In-situ

Procedures and Activation Steps

Safety - Eliminates Sulfiding Chemicals

and Exotherms During Start-up

Timeliness - Fastest Start-up Possible

TRICAT