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About Me – Vannavaree Vannasurachat • Hometown: Buriram, Email: vannavaree.van@gmail.com, Mobile: (+66) 93-210-3237 • Chemical Engineer with interests in Oil & Gas Industries, Upstream & Downstream Petrochemical, Oil & Gas Industries. • Experienced in both Production and Process Design. • Proficient in English (TOEIC 910). • Soft Skills: Hardworking, result-driven, collaborative across disciplines, eager to learn and succeed. • Hobbies: Exploring art, Cafe hopping, Netflix. Education & Experience King Mongkut’s Institute of Technology Ladkrabang (Aug 2020 – Mar 2024) • B.Eng. Chemical Engineering, GPA 3.74 (First Class Honors) • Academic Excellence Scholarship 2022– 2023 (highest overall academic score in class) Dow Chemical Thailand (Jun 2024 - Now) • Plant: Specialty Elastomer Plant • Role: • Production Engineer (Now) • Improvement Engineer (Aug-Sep 2024) Esso (Thailand) Public Company – Esso Sriracha Refinery (Jun - Nov 2023) • Role: Process Design Engineer (Intern) • Main Project: Optimization of Caustic Injection Location to Reduce Fouling and Energy Loss in the Crude Preheat Train • 6 months Internship and Cooperative Education Program ADP 2026 ENGINEERING +
Role: Production Engineer Plant: Specialty Elastomer Plant (Solution LLDPE) Responsibility: • Executed product grade transitions in alignment with the production schedule by optimizing reactor operating conditions. • Led root cause investigations (RCI) and implemented preventive measures to sustain consistent product quality. • Troubleshoot plant issues through data analysis and provided technical guidance to operations teams. • Enhanced operational efficiency by revising existing procedures and developing new ones based on engineering best practices. Key Skills Applied: Process troubleshooting, polymer technology, reactor operations, risk assessment, procedure development. Work Experiences – Jun 2024 - Now + 1. Product Transition - LLDPE Solution technology Achievement: 97.4% prime product benchmark (2025) – new plant record Control parameter Primary Control Knob Other effected parameters C2 Conversion Catalyst Catalyst efficiency effect by Reactor Temp, Resident time, Impurities Density Polymer branch Comonomer Conversion, Catalyst CM Incorporate Melt Index (MI) Polymer length H2 Reactor Temp (Thermal shuttering) 1. Planning activities for grade transition. 2. Provide control knob condition base on reactor condition at that time. 3. Provide technical support for handle equipment operating condition change – ex. Feed & Recycle C2 compressor, Refrigerant unit etc. + 2. Product Quality Investigation & Solving Achievement: Reduced off grade from grey-pellet generation by 45% compared to 2024 Grey pellet from aluminum fouling in reactor Aggressive solution viscosity change during grade transition A→B High usage of aluminum STOP Aluminum Protect catalyst from impurities, cannot be reduce. Add high H2 to drive MI then Cut H2 after switch catalyst due to different reactivity SOLVE Increase reactor temp Instead of adding H2, Enhance effect of thermal chain shuttering. ADP 2026 ENGINEERING
Work Experiences – Jun 2024 - Now + 3. Plant Startup & Shutdown Achievement: Standardized shutdown and startup procedures • Updated and standardized operating procedures by integrating best practices from sister plants in the USA & Spain and applying engineering principles. • Defined optimized shutdown conditions based on production rate and polymer properties. • Designed a new reactor-filling route to minimize time while maintaining safety and preventing over-pressure. • Developed raw-material feed strategies to prevent polymerization outside the reactor during startup. + 4. Maintenance activities Achievement: Successfully completed high-risk maintenance activities with enhanced safety protocols Achievement: Conducted RCI on reactor feed-injector plugging, defining corrective and preventive actions 1. Gasket replacement on reactor pressure-relief outlet knockout drum, eliminated leakage and restore sealing integrity. 2. Internal inspection of spent-solvent tank, contributing to its 15-year calibration and long-term asset-integrity program. Planning Work Schedule Define Work Scope Prepare High-Risk Procedures • Develop high risk procedure and energy isolation scheme • Define isolation for confined space entry • Assess risks of isolating safety protection devices and set mitigation plan • Obtain approval from Process Safety Technical Center Equipment Preparation Mechanical Execution Return to Operation (RTO) • Confirm de-isolation • Verify O₂-free condition • Check dry dew point • Conduct pressure/leak test before resuming operation • Applied Swiss Cheese Model to understand failure mechanisms. • Used Why-why analysis chart to identify root causes. • Recommended system improvements and operator training to prevent recurrence. • Align with plant condition and production plan • Coordinate with mechanical team • Ensure scope matches production and safety requirements • Empty equipment and ensure hydrocarbon-free condition • Hand over equipment to mechanical team for maintenance activities ADP 2026 ENGINEERING Example
Internship – Jun - Nov 2023 (6 months) Role: Process Design Engineer – Project based internship (Co-operative Program) Plant: Esso Sriracha Refinery Project: Optimization of Caustic Injection Location to Reduce Fouling and Energy Loss in the Crude Preheat Train Scope: • Engineered and sized new plant facilities, performing hydraulic calculations for pump selection and integrating piping and instrumentation design to meet process requirements. • Evaluated risks for stress corrosion cracking and thermal fatigue, developing mitigation strategies to strengthen mechanical integrity and prevent failure. Benefit: • Anticipated 15% heat-duty improvement (1.39 MW gain), translating to $393K/year savings and reduced NOx/CO emissions. • Reduce cost of heat exchanger cleaning from reduced fouling rate. CaCl2 + 2H2O → Ca(OH)2 + 2HCl > ~120°C MgCl2 + 2H2O → Mg(OH)2 + 2HCl > ~205°C NaCl + H2O → NaOH + 2HCl > ~480°C Crude Tank CPHT-1 CPHT-2 F-101 D-101 Desalter T-101 Atmospheric Distillation Tower Overhead Drum To VDU To FCCU To GOHF-2 To GOHF-1 To KHF To NHF HCl condensation leads to severe corrosion in overhead systems. Current Injection Point 1 2 Operating temp. < 480◦C P-101A/B/C Fired Heater To prevent corrosion: 1. Desalter unit 2. Caustic solution (15%wt NaOH) injection NaOH + HCl → NaCl + H2O 2NaOH + MgCl2 → 2NaCl + Mg(OH)2 2NaOH + CaCl2 → 2NaCl + Ca(OH)2 STEP 1 : Analyzed current system and weakness + • Stress Corrosion Cracking (SCC): o Assessed risk of SCC using NACE standards o Mitigated via Post Weld Heat Treatment and Static Mixer for proper caustic mixing • Thermal Fatigue: o Installed Thermal Sleeve at injection point to buffer temperature fluctuations STEP 2 : Selected Solution and Site Survey STEP 3 : Evaluate risks and concerns + STEP 4 : Hydraulic & Equipment Sizing • Identified corrosion risks from HCl formation due to hydrolysis of inorganic salts at elevated temperatures. • NaCl prevents HCl formation but causes fouling in heat exchangers, reducing thermal efficiency. • Relocated caustic injection point downstream of heat exchangers to reduce fouling. • Designed new route including: Pump selection, Instrumentation and piping layout. • Conducted Pre-HAZOP to address process safety concerns. • Pump Adequacy Check: Verified NPSHa > 1.1*NPSHr for existing crude booster pumps. • New Pump Sizing: Calculated required head and NPSHa. • Orifice Sizing: Ensured beta ratio within 0.2–0.75 per API MPMS Ch. 14.3. • Valve Sizing: Designed for 20–80% operating stroke range. • PRV Setpoint: Based on max operating pressure and validated against MAWP. • Pipe Specification: Selected per ASME B31.3 and ANSI standards based on chemical service, temperature, and pressure. + STEP 5 : Summary • Verified pump capacity and performance to ensure suitability for the new injection configuration. • Delivered complete equipment and instrumentation specifications to support cost estimation and the subsequent detailed engineering phase. Knowledge Gained Technical Skills: Process design, hydraulic calculations, HAZOP, risk mitigation, mechanical integrity Soft Skills: Project management, stakeholder engagement, technical communication ADP 2026 ENGINEERING
Extracurricular Activity • Chemical Engineer Ladkrabang camp (2022) • Served as Head of Sponsorship Team, securing funding and partnerships. • Supported fluidization unit operation lab workshop. • Strengthened leadership, teamwork, and event planning skills. CEL CAMP #10 • Coordinated with Temasek Polytechnic • Engaged in cross-cultural academic learning focused on socio-political, technological, and cultural issues. • Collaborated with international peers through structured. discussions and group activities. • Developed global perspective and intercultural communication skills. TF SCALE 2022 in Singapore • Coordinated with Ming Chi University of Technology • Completed Mandarin language courses and hands-on STEM lab experiments. • Participated in immersive cultural experiences with students from seven countries. • Enhanced adaptability, teamwork, and appreciation for diversity. 2023 MCUT LANGUAGE & CULTURE CAMPin Taiwan • Coordinated with Singapore Polytechnic and Tokai University • Applied Design Thinking to co-create sustainable solutions for community-based challenges. • Worked in multidisciplinary teams to develop prototypes and present innovations. • Gained experience in human-centered design and problem-solving. Learning Express (LeX) Program ADP 2026 ENGINEERING