1- REFINERY OF POINTE - NOIRE CATALYTIC REFORMING UNIT

Transcription

1 1- REFINERY OF POINTE - NOIRE CATALYTIC REFORMING UNIT

2 2 - AFRICA

3 3 CARACTERISTICS OF THE REFINERY GEOGRAPHICAL LOCATION : Pointe Noire AREA : 32 ha that is 800 m x 400 m CAPACITY : 115 t/h of mixed Djeno crude oil CAPACITY : BPSD of mixed Djeno crude oil CONSTRUCTION : by SYBETRA company START-UP : 1982 by TECHNIP company STOP : MANAGING COMPANY : CORAF % HYDROCONGO 40% SNEA % HYDROCONGO 40% CONGO SINCE % SNPC

4 4 MANUFACTURING DIAGRAM OF THE REFINERY

5 5 - CARACTERISTICS OF THE REFORMER MINI MAXI CAPACITY, t/h : CAPACITY, BPSD : ~ LOAD : HYDROTREATED NAPHTA TECHNICAL PROCESS : I F P CATALYSTS : AXENS TECHNOLOGY : SEMI- RENEGERATING REFORMER WITH A FIXED BED OF CATALYSTS IN 3 SUCCESSIVE SPHERIC RADIAL REACTORS AND 1 CYLINDRICAL RADIAL REACTOR.

6 6 EXPECTATIONS OF THE REFORMER Produce hydrogen for the hydrocracker. Produce a high-octane base in compliance with the octane rating for the unleaded premium gasoline

7 7 DIAGRAM OF THE REFORMER

8 8 - CARACTERISTICS OF THE IFP PROCESS PROCESS : Catalytic reforming LICENCE : IFP LOAD : Naphta of direct distillation, hydrocracking or catalytic cracking PRODUCTS : NOR clear gasoline Aromatics (BTX). OPERATION CONDITIONS : Temperature C C Pressure 14 bar eff. PPH H2/HC Ratio 4 8. CATALYSTS : Platinum catalyst with a promoter Life span 3-5 years. CAPACITIES : BPSD ~ ( t/h ). INVESTMENTS DONE IN 1972 : Limited investment of the unit $ /BPSD Catalyst $15 $30 /BPSD. ELEMENTS OF THE TRANSACTION COST IN 1972 AND FOR A BPSD UNIT Electricity 7.2 kwh/m3 load Fuel kcal/m3 load Cooling water 0.6 m3/m3 load Steam (20 bars) 86.3 kg/m3 load

9 9 INITIAL CRACKING OF CRUDE OIL

10 10 CARACTERSITICS OF HEAVY GASOLINE Nature : Hydrotreated Naphta of direct distillation and hydrocracking Distillation range : extended load PI - PF ASTM = C Density : kg/l at 15 C. Composition : Paraffin-base load Paraffin : 52 % vol Olefins : 0 % vol Naphthenic : 44 % vol Aromatic : 4 %vol Reforming index (N+2A) : 52%vol Sulfur content : 0.5 ppm wt maxi Nitrogen content : 0.5 ppm wt maxi Lead content : 5.0 ppb wt maxi Chlorine content : 1.0 ppm wt maxi Water content : 5.0 ppm wt maxi Heavy metal content ( As, Cu, Hg, ) : 5.0 ppb wt maxi

11 11 DIAGRAM OF THE HYDROCRACKING UNIT

12 12 CURRENT CATALYST OF CATALYTIC REFORMATION TYPE : RG 682 A 1.6 CATALYST : Trimetallic 0.25%wt Pt, 0.40%wt Re and 3rd metal ACID SUPPORT : alumina combined with an halogenated component (Chloride) GRAINS DIAMETER : 1.6 mm SPECIFIC AREA : m2/g PORE VOLUME : m3/g LOADING DENSITY : t/m3 CATALYST WEIGHT: t dispatched as follows : R3001 : t R3002 : t R3003 : t R3003 : t

13 13 OPERATING PARAMETERS RON 96 RON 99.5 WAIT SOR TEMPERATURE, C WAIT SOR TEMPERATURE, C AVERAGE REACTION PRESSURE, bar eff. : 19.5 ARRESTER S AIR PRESSURE, bar eff. : 17.5 SPACE VELOCITY WHSV or PPH, h-1 : 1.75 MOLAR RATION H2/HC or RECYCLING RATE : 6.5

14 14 - ESSENTIAL REFORMATION PARAMETERS % pds ex reactor RON 96 RON 99.5 H2 SOR H2 EOR % pds ex reactor C5+ SOR C5+ EOR % vol. ex reactor C5+ SOR C5+ EOR CYCLE DURATION, months CYCLE DURATION, m3/kg of cata NB : SINCE 2006, CONGO HAS SHIFTED TO UNLEADED PREMIUM GASOLINE. THE BASES FOR THE PREMIUM GASOLINE ARE LIGHT GASOLINE AND THE REFORMATE. THE NO F1 DE REFORMATE IS USED FOR THE PRODUCTION OF FUEL WITH SPECIFICATIONS (NO = 91 MINI)

15 OPERATION RECORD OF THE REFORMER REFORMER

16 MATERIAL BALANCE OF THE REFORMER kg/h %pds Naphta load : Cycle gas : Cycle gas : D3001 Gas to Fuel gas : Gas to HDT : D3002 Gas to Fuel gas : GPL D3002 to gas plant : Reformate : Losses and mistakes :

17 CARACTERISTICS OF THE LOAD Interval of distillation PI PFASTM, C : Density, kg/l at 15 C : Reformation index (N+2A), %vol : Sulfur content, ppm pds : maxi Nitrogen content, ppm pds : maxi Water content, ppm pds : < maxi

18 REFORMATION CATALYST TYPE : RG 482 PLATINE : 0.3 % pds RHENIUM : 0.3 % pds WEIGHT : 6.5 t CYCLE DURATION : m3/kg de cata DUTY HOURS OR AGE : m3/kg de cata

19 OPERATION CONDITIONS TEMPERATURE WAIT, C : ARRESTER AIR PRESSURE, bar eff : SPACE VELOCITY WHSV ou PPH, h-1 : MOLAR RATIO H2/HC : mini

20 REFORMATION PARAMETER HYDROGENE. Performance, % pds on load : 2.02 REFORMATE. Performance, % pds on load : Performance, % vol on load : Octane rating : Density, kg/l à 15 C : Reid Vapor pressure, bar : PI, C : %vol, C : %vol, C : %vol, C : PF, C :

21 21 ACHIEVEMENTS SINCE 1982 Change of catalyst in view of the improvement of hydrogen and reformate production and also for the extension of operation cycles : RG MARS 2008 : RG 482 SINCE MAY 2008 : RG : Following a leakage of non burning gas on the flange seam welding of the second reactor, the welded flanged elbows have been replaced by forged flanged elbows. The fixed supports of the elbows have also been replaced by adjustable supports.. METAL STOP 2008 : Setting up of a mechanism for the neutralization of the waste gases with caustic soda in catalyst regeneration phase.