Figure 1 MTD ANN schematic

Figure 2 Methanol conversion parity plot for a) GDA b) RP c) GDX d) LM with optimal ANN structure. ( -●-experimental data and -○-predicted data)

Figure 3 MTP ANNSchematic

Figure 4 Propylene selectivity parity plot

Figure 5 Relative significance of the factors on methanol conversion (MTD) and propylene selectivity (MTP).

Figure 6 Propylene selectivity as function of operating condition: a) Catalyst mass and methanol flow b) Water flow and methanol flow c) Argon flow and methanol flow d) Argon flow and temperature

The advantages and disadvantages of various dye removal techniques [9, 11]

Temperature(◦C)

Catalyst weight(g)

MeOH flow(ml min−1)

Ar flow(ml min−1)

250

25

50.50

154

275

50

309

613

290

100

792

1580

325

200

1250

2560

Variable levels for MTD reaction [32]

Temperature
(◦C)

Catalyst weight(g)

MeOH     flow
(ml min−1)

Argon flow
(ml min−1)

water   flow
(ml min−1)

400

50

0.92

0

0

450

110

1.84

139.50

0.92

500

220

2.50

1144

1.50

550

330

3.68

2288

1.84

Variable levels for MTP reaction [31]

Structure                       Transfer  Function         R2          RMSE

4-5-1

TS-PL

0.961

0.016

4-10-1

TS-PL

0.900

0.007

4-15-1

TS-PL

0.918

0.003

4-20-1

TS-PL

0.820

0.097

4-50-1

TS-PL

0.660

0.026

4-5-1

TS-TS

0.899

0.048

4-5-1

LS-PL

0.799

0.048

4-5-1

PL-PL

0.890

0.012

4-5-10-1

TS-TS-PL

0.890

0.041

4-5-20-1

TS-TS-PL

0.820

0.079

4-10-10-1a

TS-TS-PL

0.973

0.012

4-15-50-1

TS-TS-PL

0.820

0.062

4-10-10-1

LS-LS-PL

0.930

0.061

4-10-10-10-1

TS-TS-TS-PL

0.850

0.067

Details of the various examined MTD ANNs with LM algorithm

Kinetic model

Reactor  model

R2

Kaarsholm  et al. 32

Fluidized bed

0.901

 

6 CSTR’s

0.940

Bercic and Levec 32

Fluidized bed

0.884

 

6 CSTR’s

0.925

MTD ANN

 

0.973

Comparison of different models for MTD reaction

Table 6: Details of the various examined ANNs for MTP

Structure

Learning Algorithm

Transfer  Function

R2         RMSE

5-5-1

LM

TS-PL

0.639

0.076

5-15-1

LM

TS-PL

0.976

0.012

5-20-1a

LM

TS-PL

0.999

0.0007

5-25-1

LM

TS-PL

0.915

0.025

5-30-1

LM

TS-PL

0.827

0.032

5-50-1

LM

TS-PL

0.934

0.022

5-20-1

GDX

TS-PL

0.354

0.065

5-20-1

RP

TS-PL

0.562

0.064

5-20-1

BR

TS-PL

0.279

0.076

5-20-10-1

LM

TS-TS-PL

0.565

0.060

5-20-20-1

LM

TS-TS-PL

0.408

0.071

5-20-50-1

LM

TS-TS-PL

0.208

0.094

5-20-10-1

LM

TS-LS-PL

0.329

0.125

5-10-10-1

LM

LS-LS-PL

0.552

0.062

a Optimum MTP ANN topology