< Chemical Process Engineering />< Process Engineering />
I'm Hazem Mensi.CHEMICAL PROCESS ENGINEER.
Chemical Process Engineering student at INSAT (Institute of Applied Sciences and Technology) and an Aspen Certified Expert User in Aspen HYSYS. Having completed 3 rigorous industrial engineering internships (EPPM, Air Liquide, OMV), I bring a verified technical background focused on the Energy Industry, Chemical Plants, EPCs, Energy Transition, and Renewable Fuels. Actively seeking a 4–6 Month Graduation Internship starting .
Execution of critical relief valve and header line sizing for the Marsa El Brega gas treatment and processing plant project, adhering rigorously to international safety codes.
Critical gas & liquid orifice sizing calculation sheets
Inlet 3% pressure drop & outlet backpressure limits
Gas processing plant detailed feasibility
Process datasheets for relief valves & rupture disks
Project: Marsa El Brega (Libya) • Client: Taknia (TLEC) / SOCCodes: API 520 Part I & II • API 521 / ISO 23251
02 // HYSYS Dynamics
Dynamic Model
Dynamic Simulation & Flow Assurance
Transient Plant Sizing & Operations
Modeling complex unsteady-state behaviors to prevent pipeline blockage and surge vessel overflow during critical operations.
Technical review and auditing on behalf of the project management consultant (PMC) for regional oilfield rehabilitation, verifying EPC contractor calculations.
A chronological progression of technical maturity – advancing across 3 industrial engineering internships: EPPM Gas Plant Detailed feasibility & PMC auditing, Air Liquide cryogenic operations, and OMV sour gas FEED.
Process Engineering Intern • Tunis, Tunisia · Hybrid
Detailed feasibility study engineering for gas treatment and processing facilities and PMC technical auditing for major regional oilfield rehabilitation.
Project 1: Detailed Feasibility Study of New Gas Plant at Marsa El Brega (Libya)
— Client: Client: Taknia Libya Engineering Company (TLEC) · Final Client: Sirte Oil Company (SOC)
▪Delivered process feasibility study engineering for Client: Taknia Libya Engineering Company (TLEC) & Final Client: Sirte Oil Company (SOC)
▪Safety Valve Sizing, Inlet/Outlet Line Sizing as per API 520 / 521
▪Staggered Blowdown Analysis & Dynamic Depressuring to 50% Design Pressure at 15 min (API 521) in Aspen HYSYS Dynamics & Steady-State
▪Flare Network Design in Aspen Flare System Analyzer (FLARENET), Flare Stack Height and Radiation Analysis
▪Flare Knock-Out Drum (FKOD) Sizing and Process Datasheet Preparation
▪Heat exchanger thermal design using Aspen EDR (HTFS)
▪Process Datasheet Preparation for Heat Exchangers and Knock Out Drums
▪Heat and Material Balance calculations in Aspen HYSYS & Aspen Simulation Workbook (ASW)
▪Pump Hydraulics, NPSH Calculations, and Process Datasheet Preparation
▪Critically audited EPC contractor process design basis, equipment datasheets, and separator sizing calculations against API 12J and project design criteria
▪Multiphase Flowline Hydraulics and Line Sizing Verification in PIPESIM & Aspen HYSYS Upstream
▪Dynamic Transient Startup and Hydrate Mitigation Review in HYSYS Dynamics
▪Topside slug catcher surge reception and liquid level control verification in HYSYS Dynamics
▪Technical Query (TQ) Management and EPC Discrepancy Escalation
Engineering Codes & Design Standards:
API 520 Parts I & IIAPI 521 / ISO 23251API 14EGPSA Engineering Data BookTEMAASME Sec VIII
Operations Engineering Intern • Ben Arous, Tunisia · On-site
Direct Contact Heat Exchanger (DCHE) thermal retrofit in cryogenic Air Separation Unit (ASU) and industrial cooling water management (Internal Plant Operations).
Direct Contact Heat Exchanger Retrofit & Industrial Operations
▪Spearheaded the hydraulic retrofit of a direct contact heat exchanger in Sulzer Sulcol, KG-Tower, and Aspen Plus; modeled high-performance structured and modern random packings (FLEXIPAC® HC 2Y, MellapakPlus™ 252.Y, NeXRing™ 2), achieving an 85% pressure drop reduction, maximized flooding margins, and expanded hydraulic throughput.
▪Managed industrial water cooling systems with 100% regulatory compliance. Oversaw inspections, quality testing, and maintenance scheduling to ensure continuous operational reliability.
▪Enforced strict HSE protocols for cooling towers with 100% safety compliance. Rigorously utilized specialized PPE and respiratory protection during high-stakes plant operations.
Engineering Codes & Design Standards:
Cooling Technology Institute (CTI) StandardsTEMA StandardsAir Liquide Industrial Safety Guidelines
Cooling Water Quality Logsheets & Preventive Maintenance Protocol
Brownfield DCHE Revamp Engineering Report
OMV
FEED Gas Sweetening & Thermodynamics
Process Engineering Intern • Tunis, Tunisia · On-site
Front-End Engineering Design (FEED) for the Amine Sweetening Tie-In project at the brownfield Nawara CPF (Internal Asset Operations), improving CO₂ removal to 1.86 mol% while cutting reboiler duty to 3500 kW through rigorous HYSYS & ProMax solvent optimization.
▪Supported FEED for the Amine Sweetening Tie-In project serving 3 new gas wells at the brownfield Nawara CPF. Modeled systems in BR&E ProMax and Aspen HYSYS, developing PFDs and preliminary P&IDs using AutoCAD P&ID and Bluebeam Revu.
▪Developed Heat and Material Balances (HMBs) and optimized the Acid Gas Removal Unit (AGRU) in HYSYS & ProMax, improving CO₂ removal to 1.86 mol% (<3 mol%) using a 40 wt% MDEA + 2 wt% piperazine solvent blend.
▪Enhanced energy efficiency by cutting regenerator reboiler duty to 3500 kW while maintaining ≤ 0.45 mol CO₂/mol amine rich loading, effectively balancing performance and OPEX.
▪Conducted production lifecycle analysis for well start-up and decline scenarios, aligning solvent circulation rates with transmission pipeline delivery constraints and Wobbe index limits.
Engineering Codes & Design Standards:
GPSA Section 21 (Hydrocarbon Treating)API RP 945 (Amine Units)Shell DEP & NACE MR0175 / ISO 15156
Tangible Engineering Deliverables:
Optimized Heat & Material Balances (H&MB) for 3 Well Lifecycle Scenarios
Process Flow Diagrams (PFDs) with Stream Tables
Preliminary P&IDs for Amine Contactor and Stripper Loops
Amine Regenerator Reboiler Process Datasheet
// Engineering Portfolio•6 Rigorous Case Studies
Engineering & systems case studies.
Quantified industrial case studies spanning gas plant EPC safety systems, brownfield FEED gas sweetening, cryogenic column retrofits, and computational process automation.
Plant Safety & Transient SimulationEPPMClient: Taknia Libya Engineering Company (TLEC) · Final Client: Sirte Oil Company (SOC)
Executed comprehensive blowdown analysis and dynamic depressuring in Aspen HYSYS Dynamics and steady-state to model peak relief loads, thermal shrink, and low-temperature metallurgy risks for the "Detailed Feasibility Study of New Gas Plant at Marsa El Brega" project (Client: Taknia Libya Engineering Company – TLEC; Final Client: Sirte Oil Company – SOC), followed by full flare network hydraulic backpressure analysis in Aspen Flare System Analyzer (FLARENET) and flare stack radiation sizing per API 521.
Relief Standards
API 520 / 521
Sizing & Depressuring Criteria
Depressuring Target
50% DP / 15 min
50% Design Pressure at 15 minutes (API 521)
Radiation Limit
1.58 kW/m²
Continuous personnel exposure limit per API 521
Simulation Tools
HYSYS & FLARENET
Dynamics, Steady-State & Flare Analyzer
Standards:
API 521 (Pressure-relieving and Depressuring Systems)
On the Amine Sweetening Tie-In project at the brownfield Nawara CPF (internal asset operations), executed core process simulation and optimization for an Acid Gas Removal Unit (AGRU) treating sour natural gas from 3 new production wells. Benchmarked solvent kinetics and thermodynamic packages in BR&E ProMax and Aspen HYSYS, achieving 1.86 mol% CO₂ in treated gas while reducing stripper reboiler duty to 3,500 kW under strict transmission pipeline delivery constraints.
Direct Contact Heat Exchanger (DCHE) Retrofit & Cooling Systems
Spearheaded the hydraulic evaluation and column internals revamp of a direct contact heat exchanger in an industrial cryogenic cooling unit (internal operations). Modeled and benchmarked high-performance structured and advanced random packings in Sulzer Sulcol, Koch-Glitsch KG-Tower, and Aspen Plus, achieving an 85% pressure drop reduction, maximized flooding margins, and expanded hydraulic throughput capacity.
Multiphase Flowline Hydraulics, Slugging & Hydrate Transient Study
Served as process engineer on the Project Management Consultant (PMC) team for the Naft Khana Oilfield Rehabilitation project, executing rigorous technical review and auditing of the EPC engineering firm's design calculations, equipment sizing books, and flow assurance models. Independently validated multiphase gathering hydraulics in SLB PIPESIM, topside slug catcher dynamic surge response in Aspen HYSYS Dynamics, and chemical hydrate mitigation envelopes.
PMC Scope
EPC Design Audit
Calculation & Assumption Verification
Flow Assurance
PIPESIM & HYSYS
Multiphase Hydraulics & Slugging
Design Audit
API 12J & 14E
Separator & Flowline Sizing Review
Hydrate Strategy
Thermodynamic
Inhibitor Dosage & Subcooling Check
Standards:
API 14E (Design of Piping Systems)
API 12J (Separators)
ISO 13703
GPSA Sec 7
Stack:
SLB PIPESIM
Aspen HYSYS Upstream
HYSYS Dynamics
Bluebeam Revu
Energy Transition & DecarbonizationINSAT Research Initiative
•STUDY #05
Techno-Economic Assessment: SMR with Carbon Capture vs. Alkaline Water Electrolysis
Conducted a comparative techno-economic assessment (TEA) of industrial hydrogen production via Steam Methane Reforming (SMR) integrated with Carbon Capture and Storage (CCS) vs. Alkaline Water Electrolysis (AWE). Focused on Aspen HYSYS flowsheet simulation, primary reformer equilibrium, pre- and post-combustion heat integration, steam-to-carbon ratio optimization, and Microsoft Excel capital/operational expenditure modeling.
Carbon Capture
> 95%
Deep SMR + CCS Decarbonization
Steam-to-Carbon Ratio (S/C)
S/C: 2.5–3.0
Catalyst Coking Suppression Envelope
Heat Integration
Waste Heat Rec.
Syngas & Flue Gas to Capture Reboiler
Economic Modeling
Microsoft Excel
Discounted Cash Flow TEA (CAPEX/OPEX)
Standards:
ISO 14040/14044 (Life Cycle Assessment)
GPSA Section 21
IEA Greenhouse Gas R&D Guidelines
Stack:
Aspen HYSYS
Microsoft Excel
Flowsheet Material & Energy Balances
TEA Workbooks
Digital Process AutomationEngineering Innovation
•STUDY #06
Process Engineering Automation & Deliverable Generator
Developed automated process calculation and deliverable generation modules in Python and Microsoft Excel to eliminate manual transcription from simulation flowsheets. Automated equipment sizing, rating checks, and datasheet generation for safety relief valves (API 520 / 521), two-phase separators (API 12J), and centrifugal pump hydraulic calculations (TDH, NPSHa margins, and process datasheet preparation aligned with API 610 / Shell DEP formats).
Turnaround Time
10x Faster
Automated Equipment Sizing & Checks
Safety Relief
API 520 / 521
Programmed PSV Sizing Equations
Separators & Pumps
API 12J & 610
Vessel Rating & Pump Hydraulics
Core Tools
Python & Excel
Automated Engineering Workbooks
Standards:
API 520 Parts I & II (Relief Sizing)
API 521 (Depressuring Systems)
API 12J (Oil & Gas Separators)
API 610 (Centrifugal Pumps)
Shell DEP Standards
Stack:
Python
Microsoft Excel
Aspen Simulation Workbook (ASW)
OpenPyXL / Automation Scripts
Engineering Calculation Sheets
// About•Engineering Philosophy & Background
Engineering safer, optimized chemical and gas plants.
Bridging classical industrial thermodynamics with modern computational modeling to deliver verified, high-accuracy EPC engineering.
Chemical Process Engineer with Multi-Internship Field & EPC Experience
I am Hazem Mensi, a Chemical Process Engineer graduating from INSAT (Institute of Applied Sciences and Technology) and an Aspen Certified Expert User in Aspen HYSYS. Having completed 3 successive industrial engineering internships across Gas Plant Detailed feasibility / PMC auditing (EPPM), cryogenic plant operations (Air Liquide), and upstream gas FEED (OMV), I am actively seeking an End-of-Studies / Graduation Internship starting .
My technical background is dedicated to high-impact sectors: the Energy Industry, Chemical & Petrochemical Plants, EPC Consultancies, Energy Transition (CCUS), and Renewable Fuels (Green Hydrogen & E-Fuels). With verified mastery in Aspen HYSYS, Aspen Flare System Analyzer, and ProMax, alongside international engineering standards (API 520/521, ASME Sec VIII Div 1, Shell DEP, API 12J, API STD 2000, ISO 14040/14044), I ensure that process simulations translate directly into safe, verifiable, and optimized industrial deliverables.
My work combines classical thermodynamic principles with computational process modeling. Across flare network relief systems, staggered blowdown depressuring schedules, acid gas treating (MDEA + PZ), cryogenic column packings (-85% ΔP), and multiphase hydraulics, each model is grounded in validated engineering codes, vendor datasheets, and rigorous material balances.
Location & Mobility
Tunis, Tunisia
Open to worldwide relocation and international rotation
Focused on the global energy matrix, chemical manufacturing, EPC execution, industrial decarbonization, and next-generation renewable fuels.
Upstream • Midstream • LNG • Cryogenics01 //
Energy Industry & Hydrocarbons
Rigorous modeling of upstream gas processing, acid gas removal (AGRU), slug catching, cryogenic air separation (ASU), and multiphase flowline transient hydraulics.
Core Focus Areas:
Gas Processing & Conditioning
Cryogenic Air Separation Units
Multiphase Pipeline Hydraulics
Hydrate Dissociation & Mitigation
Industrial FEED with OMV & cryogenic operations with Air Liquide
Continuous Plants • Refining • Internals02 //
Chemical & Petrochemical Industry
Plant debottlenecking, structured and random column packing rating, heat exchanger network integration, pump hydraulics, and continuous chemical synthesis.
Core Focus Areas:
Distillation & Absorption Trains
Structured Packing Hydraulics
Heat Exchanger Networks (HEN)
Pump NPSH & Hydraulics
Direct Contact Heat Exchanger revamp (-85% ΔP) at Air Liquide
FEED • Detail Engineering • PMC Audits03 //
EPCs & Engineering Consultancies
Gas plant detailed feasibility engineering, API 520 safety relief valve calculation sheets, flare header network simulation (FLARENET), equipment datasheets, and PMC technical query (TQ) auditing.
Core Focus Areas:
API 520 / 521 PSV Sizing Sheets
FLARENET Hydraulic Backpressure
Process Datasheets & Calculation Books
PMC Technical Query Governance
Gas plant EPC design & PMC oilfield audit at EPPM
Industrial CCUS • Amine Scrubbing • Flaring04 //
Energy Transition & Decarbonization
Pre/post-combustion CO₂ capture, activated MDEA amine solvent modeling, staggered blowdown flaring reduction, and plant energy efficiency optimization.
Core Focus Areas:
Amine Acid Gas Removal (MDEA+PZ)
Staggered Blowdown Flaring Abatement
Waste Heat Recovery Integration
Industrial Carbon Footprint Reduction
Acid gas treating optimization & emissions abatement at EPPM
AWE • Blue H₂ (SMR) • Power-to-X05 //
Renewable Fuels & Clean Hydrogen
Techno-economic modeling (TEA), Levelized Cost of Hydrogen (LCOH), life cycle assessment (ISO 14040/14044), and Power-to-X synthesis (e-fuels, SAF, clean ammonia).
Core Focus Areas:
Levelized Cost of Hydrogen (LCOH)
Alkaline Water Electrolysis (AWE)
Steam Methane Reforming + CCS
ISO 14040/14044 Life Cycle Assessment
Comprehensive SMR vs. AWE Hydrogen Techno-Economic Assessment
Verified Profile • Technical Toolkit06 // ARSENAL
The Engineer's Technical Toolkit
A comprehensive, field-tested technical toolkit accumulated across 3 industrial engineering internships, rigorous simulation suites, international safety standards, and techno-economic modeling.
Official certifications & engineering credentials.
Official accredited digital credentials, AspenTech certifications, practical standards compliance, and hands-on simulation toolsets applied across industrial internships and academic engineering projects.
Master SimulationVerified
Aspen Certified Expert User in Aspen HYSYS®
Aspen Technology
Issued:•Expires:
Demonstrated certified competence in steady-state process simulation, thermodynamic models, column convergence, optimization, and dynamic depressuring routines.
Aspen Certified User in Aspen Shell & Tube Exchanger
Aspen Technology (Aspen EDR)
Issued:•Expires:
Certified expertise in thermal and hydraulic rating, vibration analysis, and mechanical optimization of shell and tube heat exchangers using Aspen EDR (HTFS).
Official AspenTech certification verifying comprehensive competence in flowsheet design, unit operations, stream thermodynamics, and separation processes.
Active leadership, club foundation, media direction, and technical community management across engineering student branches.
Founding Committee Member & Media Manager
•01 //
SecuriNets ENSIT
National Engineering School of Tunis (ENSIT) • Cybersecurity Club
Co-founded the cybersecurity club and helped establish its initial structure, technical roadmap, and core activities.
Organized DarkNets CTF (Capture The Flag), drawing 200+ attendees and recruiting 50+ active members.
Event Scale
200+ Attendees
Community Growth
50+ Members Recruited
Club Foundation
DarkNets CTF
Media Direction
200+ Attendees
50+ Members
Media Manager
•02 //
IEEE PES × PELS Joint Chapter Student Branch
Power & Energy Society (PES) × Power Electronics Society (PELS)
Led a three-member media team and created more than 60 social media publications.
Increased the chapter’s visibility and contributed to 250% membership growth.
Content Deliverables
60+ Publications
Chapter Expansion
+250% Membership Growth
Media Team Leadership
60+ Publications
PES & PELS
+250% Growth
// Executive Overview•Direct Answer & AI Search Reference
Chemical Process Engineering & Aspen HYSYS Profile
Structured engineering overview and direct answer blocks verified for recruiters, hiring managers, and AI knowledge assistants.
FAQ 01
Who is Hazem Mensi?
Hazem Mensi is an INSAT-educated Chemical Process Engineer and certified Aspen HYSYS Expert User specializing in EPC flare relief safety (API 520/521), amine gas sweetening (AGRU), and CCUS decarbonization modeling.
FAQ 02
What simulation software and engineering codes does Hazem Mensi specialize in?
Hazem Mensi specializes in Aspen HYSYS (steady-state and dynamic depressuring), Aspen Flare System Analyzer (FLARENET), BR&E ProMax, KBC Petro-SIM, and HTRI/EDR exchanger modeling, adhering strictly to API 520, API 521, ASME Section VIII Division 1, and Shell DEP standards.
FAQ 03
What verified engineering credentials does Hazem Mensi hold?
Hazem Mensi holds official certifications including Aspen Certified Expert User in Aspen HYSYS, Aspen Certified User in Shell & Tube Exchanger (EDR), Amine-Based Carbon Capture Process Optimization, and University of Michigan Life Cycle Assessment (LCA).
FAQ 04
What engineering internships has Hazem Mensi completed?
Hazem Mensi has completed industrial engineering internships across three major organizations: EPPM (Gas Plant Detailed Feasibility & Flare Relief Systems), Air Liquide (Cryogenic Air Separation Unit Operations), and OMV (Upstream Nawara CPF Gas Processing FEED Auditing).
FAQ 05
Is Hazem Mensi available for graduation or process engineering roles?
Yes, Hazem Mensi is available for a 4–6 Month End-of-Studies / Graduation Internship starting February 2027 in process engineering consultancies, EPC contractors, and energy operators globally.
// Contact•Graduation Internship & Recruitment
Connect to discuss a 4–6 Month Graduation Internship starting .
Actively seeking a 4–6 Month Graduation Internship starting across the Energy Industry, Chemical & Petrochemical Plants, EPC Consultancies, Energy Transition (CCUS), and Renewable Fuels.
