Actual Plates (Efficiency)
Compute the number of actual plates of a distillation column, N_actual = N_theoretical / (efficiency/100), from the number of theoretical (equilibrium) plates and the column's overall efficiency (%). Since no real plate reaches perfect equilibrium, more actual plates than theoretical are needed: a 50% efficiency doubles the plate count. It is the step that turns the theoretical design into the physical column. Enter the theoretical plates and the overall efficiency.
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Número de pratos reais (eficiência)
Os métodos de projeto de destilação (McCabe-Thiele, Fenske) calculam o número de pratos teóricos — pratos ideais em que o vapor que sai está em equilíbrio perfeito com o líquido. Mas nenhum prato real é tão bom: o contato vapor-líquido é limitado pelo tempo, pela área e pela hidrodinâmica, e o equilíbrio nunca se completa. A eficiência global da coluna mede esse 'gap': N_real = N_teórico / (eficiência/100). Uma eficiência de 50% significa que cada prato real faz só metade do trabalho de um teórico, exigindo o dobro de pratos físicos. Eficiências típicas vão de 40% a 80%, dependendo do sistema (viscosidade, tensão superficial, tendência a espumar) e do tipo de prato (valvulados, perfurados, com borbulhadores). Esse é o passo que transforma o projeto teórico na coluna física que será construída — e mais pratos significam coluna mais alta, mais cara e com maior perda de carga. A eficiência é estimada por correlações (O'Connell) ou por dados de plantas semelhantes. Informe os pratos teóricos e a eficiência global.
Related Tools
Number of Transfer Units (NTU)
Compute the number of transfer units (NTU) of an absorption or stripping column (dilute case), NTU = ln(C_in/C_out), from the inlet and outlet concentrations. NTU measures the 'difficulty' of the separation: the greater the removal desired, the more transfer units are needed. Together with the height of a unit (HTU), it defines the total packing height. Enter the inlet and outlet concentrations.
Minimum Reflux (Underwood)
Estimate the minimum reflux ratio of a binary distillation by Underwood's equation (saturated-liquid feed), Rmin = [xD/xF − α·(1−xD)/(1−xF)]/(α − 1), from the relative volatility (α) and the light-component mole fractions in the distillate (xD) and feed (xF). At minimum reflux, the column would need infinite plates; the operating reflux is a multiple of it (1.1–1.5×). It is a key number in column design. Enter α, xD and xF.
Chemical Reaction Yield
Compute a chemical reaction's yield, Y = (actual mass obtained / theoretical mass)·100%, comparing what was actually produced with the maximum predicted by stoichiometry. Real reactions rarely reach 100%: there are incomplete reactions, side reactions, purification losses. Yield is the efficiency indicator that separates paper chemistry from lab and industrial chemistry. Enter the actual mass obtained and the theoretical mass.
The results provided by this tool are for general informational and educational purposes only and do not constitute professional, financial, medical, legal, tax or accounting advice. Always confirm important decisions with a qualified professional and official sources.