Chemical Engineering

Chemical engineering calculators for distillation, reactor design, heat exchangers, mass balance, and process scale-up.

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Estimate minimum and actual theoretical stages, minimum reflux ratio, and feed stage location using the McCabe-Thiele simplified approach.

Size CSTR and PFR reactors for first-order reactions using the design equation V = FA0·X/(−rA).

Calculate the standard enthalpy of reaction (ΔH) from formation enthalpies of reactants and products using Hess's Law.

Perform overall and component mass balances for a single-unit process with feed, product, waste, and recycle streams.

Calculate sensible heat, latent heat, total heat duty, and power requirements for process heating and cooling operations.

Calculate pressure drop, head loss, and Reynolds number for pipe flow using the Darcy-Weisbach equation.

Calculate vapor-liquid equilibrium in a flash drum using the Rachford-Rice equation for a binary system.

Calculate cooling range, approach, Merkel number, evaporation rate, and makeup water requirements for cooling tower design.

Design a packed absorption column: calculate diameter, packing height, number of transfer units (NTU), and pressure drop.

Calculate filtration time, average flow rate, and cake thickness for constant-pressure filtration operations.

Design a single-effect evaporator: calculate evaporation rate, steam requirements, heat duty, and required heat transfer area.

Calculate water removal, drying time, energy requirements, and exit humidity for batch and continuous dryer operations.

Calculate crystal yield, mother liquor mass, and percent recovery for cooling and evaporative crystallization operations.

Scale reactor agitation from lab to production using constant tip speed, constant P/V, or constant Reynolds number criteria.

Assess chemical storage compatibility and segregation requirements based on hazard ratings for acids, bases, oxidizers, flammables, and toxics.