In short: FLN Tutors gives chemical reaction engineering (CRE) assignment help and tutoring for chemical engineering students. Tutors explain rate laws and kinetics, stoichiometry tables, design equations for batch, CSTR and plug flow reactors, reactors in series, multiple reactions and selectivity, non-isothermal operation, residence time distribution and catalytic reactors step by step, with worked sizing problems. Matched to a verified specialist who knows your course, your university's marking criteria, and your deadline.
Topics we cover
FLN offers one-to-one online Chemical Reaction Engineering tutoring with verified subject specialists. Sessions focus on calculations, design problems and the theory behind them, including Reaction Kinetics, Reactor Design, Batch Reactors and CSTR, using your own course material, so you understand the subject and can apply it yourself.
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It is one-to-one support from a chemical engineering tutor who explains how reactors are sized and operated, and helps with design problems, kinetics data and reports. For general process balances, see chemical process calculations help.
| What you need | Best option | What you get |
|---|---|---|
| Regular lessons through a CRE module | Live one-to-one tutoring | Design equations explained |
| Problems you are stuck on | Homework help | Step-by-step worked solutions |
| A graded design project or lab report | Assignment help | Guidance within your university's rules |
This map lists the core chemical reaction engineering topics, the point where students most often get stuck, and how a tutor helps you past it.
| Topic | Where students get stuck | How a tutor helps |
|---|---|---|
| Rate laws | Order, rate constants and the Arrhenius equation | Worked kinetics examples |
| Stoichiometry | Concentrations in terms of conversion | Stoichiometric tables |
| Batch reactors | Reaction time for a target conversion | Worked batch problems |
| CSTRs | Sizing with the design equation | Worked CSTR volumes |
| PFRs | Integrating the design equation | Worked PFR volumes |
| Reactors in series | Comparing CSTR, PFR and series | Levenspiel plot examples |
| Multiple reactions | Selectivity and yield | Selectivity calculations |
| Non-ideal flow | Residence time distribution | RTD interpretation |
Tutors follow CRE I and II syllabi.
| Area | Topics |
|---|---|
| Kinetics | Rate laws, elementary and non-elementary reactions, Arrhenius equation |
| Data analysis | Integral and differential methods, half-life method |
| Ideal reactors | Batch, CSTR, PFR, packed bed, design equations |
| Reactor networks | Reactors in series and parallel, recycle reactors |
| Multiple reactions | Series and parallel reactions, selectivity, yield |
| Non-isothermal design | Energy balances, adiabatic reactors, multiple steady states |
| Non-ideal reactors and catalysis | RTD, dispersion, catalytic kinetics, mass transfer limits |
A liquid-phase first-order reaction A → B has k = 0.2 min⁻¹, a feed of 10 L/min and a target conversion X = 0.9.
| Reactor | Design equation | Residence time | Volume |
|---|---|---|---|
| Single CSTR | τ = X ÷ (k(1 − X)) = 0.9 ÷ (0.2 × 0.1) | 45 min | 450 L |
| Two equal CSTRs in series | (1 − X) = 1 ÷ (1 + kτ)², so kτ = √10 − 1 = 2.162 | 10.8 min each | ≈ 216 L total |
| PFR | τ = −ln(1 − X) ÷ k = 2.303 ÷ 0.2 | 11.5 min | ≈ 115 L |
For positive-order reactions, a PFR needs less volume than a CSTR for the same conversion, and CSTRs in series approach PFR performance.
Two common problems.
| Question | Working | Answer |
|---|---|---|
| A → products, second order, k = 0.05 L mol⁻¹ min⁻¹, CA0 = 2 mol/L. Time for X = 0.8? | kCA0t = X ÷ (1 − X); t = 4 ÷ (0.05 × 2) | 40 min |
| k rises from 0.010 to 0.040 min⁻¹ between 350 K and 380 K. Activation energy? | Ea = R ln(4) ÷ (1/350 − 1/380) = 8.314 × 1.386 ÷ 0.0002256 | ≈ 51 kJ/mol |
Tutors match your level, syllabus and exam board, from school to PhD.
| Level | What you study | Matching help |
|---|---|---|
| A-Level Chemistry | Rates, orders and the Arrhenius equation | A-Level AQA Chemistry and live tutoring |
| Second- and third-year chemical engineering | CRE I and II | MATLAB, homework help |
| Design projects and GATE | Reactor design and exam practice | Fluid Mechanics and assignment help |
| Master's and research | Advanced reactor modelling and catalysis | Dissertation help |
Related: Chemical Engineering, Chemical Process Calculations, Numerical Methods for Chemical Engineers and Chemical Reaction Engineering I.
Most lost marks come from using the wrong design equation or rate law.
| Mark-loser | What to do instead |
|---|---|
| Using a PFR equation for a CSTR | Write the correct design equation for each reactor |
| Forgetting volume change in gas reactions | Include ε in the stoichiometric table |
| Wrong units for k | Check units match the reaction order |
| Assuming elementary rate laws | Use the rate law given or derived from data |
| Ignoring energy balances | Couple mole and energy balances for non-isothermal reactors |
| No physical check | Confirm that conversion lies between 0 and 1 |
Chemical reaction engineering is assessed in several formats, and each one is marked on different things. Tutors help you understand the brief and the marking criteria before you start.
| Assessment | What markers look for |
|---|---|
| Exams | Reactor sizing and kinetics problems |
| Problem sets | Complete design equations with units |
| Lab reports | Kinetic data analysis and reactor performance |
| Design projects | Justified reactor selection and sizing |
| GATE preparation | Speed and accuracy on standard problems |
CRE students use these tools.
| Tool | What it is used for |
|---|---|
| Polymath | Solving ODEs and non-linear equations |
| MATLAB or Python | Reactor modelling |
| Excel | Kinetic data fitting and Levenspiel plots |
| Aspen Plus | Reactor simulation |
| COMSOL | Detailed reactor modelling |
Chemical reaction engineering is taught to similar core ideas worldwide, but grading, referencing and course structure differ. FLN tutors work from your own syllabus and handbook and schedule lessons in your time zone. Always follow your module handbook for referencing.
| Country | Where chemical reaction engineering is studied | Grading | Referencing usually used |
|---|---|---|---|
| United Kingdom | BEng and MEng chemical engineering reaction engineering modules | GCSE 9–1, A-level A*–E; degrees First, 2:1, 2:2, Third | IEEE or Harvard |
| United States | Chemical reaction engineering courses | Letter grades A–F and a 4.0 GPA scale | IEEE |
| Australia | Chemical engineering degrees | HD, D, C, P at university; ATAR for school leavers | IEEE or Harvard |
| Canada | Chemical engineering programmes | Letter grades or percentages; GPA scales vary by province and university | IEEE |
| India | B.Tech/BE chemical engineering CRE I and II and GATE CH | Board exam percentages; university CGPA, often on a 10-point scale | IEEE |
Students in Ireland, the Gulf, Europe, Africa and Asia can book the same help, with lessons in their own time zone.
The price of chemical reaction engineering help depends on the type of task and your deadline. A short sizing problem costs less than a full reactor design project. You always see the price first: a fixed quote for homework and assignment guidance, or the tutor's hourly rate for live lessons, with no contract and no minimum number of sessions. Refunds follow our refund policy.
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Yes. Tutors explain design equations and kinetics and help with problems and projects, within your university's rules.
The branch of chemical engineering that designs and analyses reactors using kinetics and transport.
V = FA0 X ÷ (−rA), evaluated at the exit conditions.
dV = FA0 dX ÷ (−rA), integrated from inlet to outlet conversion.
For positive-order reactions, a CSTR operates at the low exit concentration throughout, so its rate is lower.
The reactor volume divided by the volumetric feed rate: τ = V ÷ v₀.
A plot of FA0 ÷ (−rA) against conversion, used to compare reactor sizes.
Several CSTRs in series need less total volume than one CSTR and approach PFR performance.
The rate of forming the desired product relative to an undesired product.
The distribution of times that fluid elements spend in a reactor, used to diagnose non-ideal flow.
Use integral methods (linear plots), differential methods or half-life analysis.
Higher temperature raises k through the Arrhenius equation, shrinking reactor volume, but may lower equilibrium conversion or selectivity.
A reactor with no heat exchange, so temperature changes with conversion.
A dimensionless number comparing reaction rate with diffusion rate in a catalyst pellet.
It is systematic; following mole balance, rate law, stoichiometry and combination steps helps.
Tutors work from your course text, such as Fogler or Levenspiel.
Often, yes, for short problems, depending on tutor availability.
Yes. Tutors use GATE-style problems for practice.
Yes. Tutoring, worked examples and feedback are a normal part of learning. You should use the explanations to understand the method and submit your own work in line with your school's or university's academic integrity rules. See our academic integrity policy.
Yes. Your files and details are used only to help you and are not shared with your school or university. See our privacy policy.
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