AMMONIUM BISULFIDE ON-LINE ANALYZER. Steve Newland- Phillips 66 Joe Fillion- Invensys August 15, 2013

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1 AMMONIUM BISULFIDE ON-LINE ANALYZER Steve Newland- Phillips 66 Joe Fillion- Invensys August 15, 2013

2 Topics Chemistry Project Objectives Field Test Design Features and Specs

3 Chemistry What is Ammonium Bisulfide (ABS)? Highly corrosive byproduct of hydrotreating and hydrocracking processes in refineries. How is it formed? Hydrotreating converts organic N and S compounds to NH 3 + H 2 S Reactor Effluent : NH 3 (g) + H 2 S(g) NH 4 HS Sour Water: NH 4 HS + H 2 O NH HS - + NH 3 (aq) + H 2 S(aq)

4 Chemistry Possible Analyses : total sulfur total ammonia total alkalinity API calculation method density conductivity

5 ABS ON-LINE ANALYZER Project Drivers: Reduced personnel exposure Better measurement precision and accuracy Improved corrosion control Process optimization

6 ABS ON-LINE ANALYZER Project Objectives: Improve accuracy to 10 % relative error Enable real time monitoring of ammonium bisulfide Perform refinery field test to optimize on-line analyzer design Develop commercial analyzer design based on field test results Install commercial analyzers at our refineries

7 ABS On-Line Analyzer Sour H2O ABS Analyzer

8 ABS On-Line Analyzer Tie-In HP Separator Temperature: < 250 F Pressure: < 1600 psig Downstream of Control valve Temperature: < 120 F Pressure: < 100 psig ABS Analyzer ties-in downstream of control valve

9 % Random Error Field Test Results Measurement Accuracy Comparison LA Refinery Unit 120 Pilot Level of Random Error versus On-Line Analyzer Method Lab method: +/- 15% Calculated method: +/- 61% 40 Random Error of Lab and Calculated Data as Normalized to the Analyzer Day LAR Lab vs. ABS On-Line (wt%) API Calc vs ABS On-Line Analyzer (wt %) 9

10 Water Wash Rate (gpm) ABS Concentration (wt %) ABS Analyzer Performance Field Test : ABS Concentration vs LA Refinery Unit 120 Water Wash Rate ~ 25 minute offset Water Wash Rate (gpm) 50 ABS (wt %) 4 5:00 7:00 9:00 11:00 13:00 15:00 17:00 19:00 21:00 23:00 7/25/11 1:00 7/25/11 3:00 7/25/11 5:00 Date real-time process monitoring eliminates sampling errors enables wash water optimization

11 ABS ON-LINE ANALYZER Data obtained from first permanent ABS Analyzer ABS-Online Analyzer ABS by Alkalinity titration ABS by API calculation Average wt.% Repeatability n=71 n=71 n=71

12 Pressure (psig) ABS On-Line Analyzer Electrolytic Conductivity (ms/cm) - 8 wt % Ammonium Bisulfide Temperature (F) Conductivity = f (T, P, Conc)

13 ABS On-Line Analyzer Features Flow-through non-contact conductivity detector Resistant to fouling and corrosion Stable calibration and response Results not affected by typical temperature, pressure, or flow changes Cost effective to install and operate Minimizes grab sampling and operator exposure to H 2 S

14 ABS On-Line Analyzer Specs Class I, Division 1 compliant Readout in wt. % ammonium bisulfide Loop-powered analyzer (1 cable) Typical flow rate: 0.03 gpm (~1 BPD) Analyzer is intrinsically safe (no purge gas needed) Sour water operating pressure: psig (standard analyzer system max pressure: 400psig) Sour water temperature operating range: 60 F -150 F (standard analyzer sample temp max: 300 F) (standard analyzer panel system ambient temp range: 34 F 120 F)

15 ABS On-Line Analyzer Utilities Sour water connection Industrial water connection Blowdown connection Cable from DCS

16 Results ABS On-Line Analyzer Summary Field test analyzer operated for 11 months Reliability and accuracy are excellent Minimal analyzer maintenance Wash water conservation = $$ 1 st Commercial analyzer installed operational + Future Installations Phillips 66 has licensed its ABS technology exclusively to Invensys to sell analyzers analyzer manufacture

17 ABS ON-LINE ANALYZER Benefits Accurate monitoring of ABS Fewer lab tests required Reduced exposure to H 2 S Improved production yields Water conservation Prevents system failures Reduced material and maintenance costs

18 QUESTIONS? Contacts: Joseph Fillion Value Consultant and Product Manager Advanced Applications Invensys