Box Behnken design and response surface methodology (RSM) were used to investigate the effects of reaction temperature, catalyst amount and circulation velocity on the yield of biodiesel.
The central composite design (CCD) of response surface methodology (RSM) was employed to investigate the effects of reaction temperature, catalyst amount and circulation velocity on the production of biodiesel.
The central composite design (CCD) of response surface methodology (RSM) was employed to investigate the effects of reaction temperature, catalyst amount and cross flow circulation velocity on the production of biodiesel in the packed bed membrane reactor.
Complete suspension of fine-grained particles is achieved at mean circulation velocities of the fluid exceeding the settling velocities of the particles by several orders of magnitude.
All other model parameters, i.e., the gas hold-ups, the circulation velocities of the liquid and the gas, the volumetric mass transfer coefficient of oxygen were predicted by employing experimentally determined correlations from the literature, verified in our reactors using the model system water air.
Different operating parameters that affect the performance of the reactor are the superficial gas velocity, liquid circulation velocity, concentration of the pollutant present in wastewater, contact time and the carbon loading.
Two ILRs were used for measurements of gas hold-up, large bubble rise velocity and liquid circulation velocity: (i) a column of diameter 0.15 m containing a draught tube of diameter 0.09 m; (ii) a column of square cross section, 0.6 × 0.6 m, containing a square draught tube, 0.3 × 0.3 m.
80 °C of reaction temperature, 0.27 g/cm3 of catalyst amount and 4.15 mL/min of circulation velocity were proved to be the optimum conditions to achieve the highest biodiesel yield.
The effect of circulation velocity, temperature, and channel spacer effect on permeate flux were investigated.
