Pyrolysis, DTG: compositions

Pyrolysis: from DTG to compositions

Estimates parameters in pyrolysis DTG and gives compositions

2025.Feb.21 22:39:03

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Screen 'csv' data

##TempC;DTG
15,094;-1,80E-02
17,594;-1,80E-02
20,094;-1,80E-02
22,594;-1,80E-02
25,094;0,31776
27,594;0,30936
30,094;0,21897
32,594;0,13022
35,094;5,02E-02
37,594;-3,75E-02
40,094;-0,14891
42,594;-0,29298
45,094;-0,46932
47,594;-0,65773
50,094;-0,8375
52,594;-0,99927
55,094;-1,1475
57,594;-1,2948
60,094;-1,45387
62,594;-1,62875
65,094;-1,82135
67,594;-2,03272
70,094;-2,26152
72,594;-2,51283
75,094;-2,78194
77,594;-3,06926
80,094;-3,35855
82,594;-3,64083
85,094;-3,90324
87,594;-4,14964
90,094;-4,3989
92,594;-4,65056
95,094;-4,90274
97,594;-5,14213
100,094;-5,35388
102,594;-5,53714
105,094;-5,69383
107,594;-5,82159
110,094;-5,90853
112,594;-5,93806
115,094;-5,89653
117,594;-5,78073
120,094;-5,60208
122,594;-5,38222
125,094;-5,13999
127,594;-4,89517
130,094;-4,65479
132,594;-4,41125
135,094;-4,15612
137,594;-3,87891
140,094;-3,58012
142,594;-3,26199
145,094;-2,92991
147,594;-2,59502
150,094;-2,27038
152,594;-1,95616
155,094;-1,6633
157,594;-1,394
160,094;-1,15577
162,594;-0,94891
165,094;-0,7747
167,594;-0,63393
170,094;-0,52329
172,594;-0,43854
175,094;-0,37525
177,594;-0,32765
180,094;-0,29171
182,594;-0,26355
185,094;-0,2406
187,594;-0,22081
190,094;-0,20352
192,594;-0,18841
195,094;-0,17651
197,594;-0,16864
200,094;-0,16571
202,594;-0,16837
205,094;-0,17717
207,594;-0,19277
210,094;-0,21641
212,594;-0,25041
215,094;-0,29625
217,594;-0,35504
220,094;-0,42744
222,594;-0,51211
225,094;-0,60686
227,594;-0,70826
230,094;-0,81155
232,594;-0,91289
235,094;-1,00936
237,594;-1,10015
240,094;-1,18774
242,594;-1,27485
245,094;-1,36564
247,594;-1,46273
250,094;-1,57025
252,594;-1,69149
255,094;-1,83134
257,594;-1,997
260,094;-2,1979
262,594;-2,44361
265,094;-2,75026
267,594;-3,13372
270,094;-3,59548
272,594;-4,13379
275,094;-4,73132
277,594;-5,37001
280,094;-6,04138
282,594;-6,75248
285,094;-7,50272
287,594;-8,29109
290,094;-9,10145
292,594;-9,89966
295,094;-10,66466
297,594;-11,34425
300,094;-11,91391
302,594;-12,37162
305,094;-12,74104
307,594;-13,05684
310,094;-13,35464
312,594;-13,6583
315,094;-13,97154
317,594;-14,28298
320,094;-14,56405
322,594;-14,78277
325,094;-14,92298
327,594;-15,00908
330,094;-15,10599
332,594;-15,30353
335,094;-15,6785
337,594;-16,26937
340,094;-17,06414
342,594;-18,0631
345,094;-19,23081
347,594;-20,55046
350,094;-21,99306
352,594;-23,49326
355,094;-25,0235
357,594;-26,49032
360,094;-27,72672
362,594;-28,55489
365,094;-28,78956
367,594;-28,28208
370,094;-26,94875
372,594;-24,81803
375,094;-22,01881
377,594;-18,7913
380,094;-15,43111
382,594;-12,23218
385,094;-9,44765
387,594;-7,23828
390,094;-5,60283
392,594;-4,46963
395,094;-3,71409
397,594;-3,22933
400,094;-2,9139
402,594;-2,70207
405,094;-2,55318
407,594;-2,44394
410,094;-2,36008
412,594;-2,29084
415,094;-2,2298
417,594;-2,17345
420,094;-2,11964
422,594;-2,06644
425,094;-2,01294
427,594;-1,95893
430,094;-1,90649
432,594;-1,85642
435,094;-1,80931
437,594;-1,7632
440,094;-1,717
442,594;-1,67002
445,094;-1,622
447,594;-1,57454
450,094;-1,5295
452,594;-1,48908
455,094;-1,45212
457,594;-1,41522
460,094;-1,37378
462,594;-1,32539
465,094;-1,27277
467,594;-1,22251
470,094;-1,17958
472,594;-1,14734
475,094;-1,12368
477,594;-1,10501
480,094;-1,0883
482,594;-1,07199
485,094;-1,05455
487,594;-1,03404
490,094;-1,0099
492,594;-0,98339
495,094;-0,95811
497,594;-0,93677
500,094;-0,91919
502,594;-0,90348
505,094;-0,88826
507,594;-0,87444
510,094;-0,86323
512,594;-0,853
515,094;-0,84017
517,594;-0,82137
520,094;-0,79631
522,594;-0,76834
525,094;-0,74301
527,594;-0,72403
530,094;-0,71044
532,594;-0,69741
535,094;-0,68194
537,594;-0,66641
540,094;-0,65571
542,594;-0,65062
545,094;-0,6458
547,594;-0,63451
550,094;-0,61575
552,594;-0,59458
555,094;-0,57789
557,594;-0,56943
560,094;-0,56932
562,594;-0,57389
565,094;-0,57605
567,594;-0,56864
570,094;-0,54994
572,594;-0,52617
575,094;-0,50703
577,594;-0,49854
580,094;-0,49958
582,594;-0,5039
585,094;-0,50474
587,594;-0,49899
590,094;-0,48858
592,594;-0,47774
595,094;-0,46933
597,594;-0,46286
600,094;-0,4562
602,594;-0,44791
605,094;-0,43832
607,594;-0,42827
610,094;-0,41752
612,594;-0,40587
615,094;-0,3943
617,594;-0,38535
620,094;-0,3809
622,594;-0,37989
625,094;-0,37879
627,594;-0,37425
630,094;-0,3654
632,594;-0,35402
635,094;-0,34251
637,594;-0,33222
640,094;-0,32327
642,594;-0,31551
645,094;-0,30973
647,594;-0,30672
650,094;-0,30587
652,594;-0,30485
655,094;-0,30058
657,594;-0,29123
660,094;-0,27809
662,594;-0,26522
665,094;-0,25704
667,594;-0,25511
670,094;-0,25803
672,594;-0,2634
675,094;-0,27007
677,594;-0,27749
680,094;-0,28394
682,594;-0,28631
685,094;-0,28249
687,594;-0,27368
690,094;-0,2642
692,594;-0,25875
695,094;-0,25964
697,594;-0,26492
700,094;-0,26919
702,594;-0,26649
705,094;-0,25414
707,594;-0,23497
710,094;-0,21576
712,594;-0,20267
715,094;-0,19733
717,594;-0,19769
720,094;-0,20011
722,594;-0,20189
725,094;-0,20217
727,594;-0,20164
730,094;-0,20182
732,594;-0,20373
735,094;-0,20679
737,594;-0,20898
740,094;-0,20829
742,594;-0,20452
745,094;-0,19942
747,594;-0,19497
750,094;-0,19166
752,594;-0,18841
755,094;-0,18395
757,594;-0,1782
760,094;-0,17231
762,594;-0,16796
765,094;-0,16628
767,594;-0,1671
770,094;-0,16932
772,594;-0,17179
775,094;-0,17403
777,594;-0,17606
780,094;-0,17761
782,594;-0,17778
785,094;-0,17542
787,594;-0,17025
790,094;-0,16363
792,594;-0,15802
795,094;-0,15531
797,594;-0,15558
800,094;-0,15698
802,594;-0,15708
805,094;-0,15453
807,594;-0,14974
810,094;-0,14433
812,594;-0,13972
815,094;-0,13635
817,594;-0,13389
820,094;-0,13206
822,594;-0,13109
825,094;-0,1314
827,594;-0,13309
830,094;-0,13551
832,594;-0,13723
835,094;-0,13664
837,594;-0,13304
840,094;-0,12717
842,594;-0,12086
845,094;-0,11555
847,594;-0,11177
850,094;-0,10928
852,594;-0,10767
855,094;-0,10665
857,594;-0,10609
860,094;-0,10632
862,594;-0,1081
865,094;-0,11186
867,594;-0,11656
870,094;-0,11976
872,594;-0,11953
875,094;-0,11631
877,594;-0,11254
880,094;-0,11083
882,594;-0,11192
885,094;-0,11409
887,594;-0,11434
890,094;-0,11089
892,594;-0,10472
895,094;-9,82E-02
897,594;-9,34E-02
900,094;-9,09E-02
902,594;-9,03E-02
905,094;-9,15E-02
907,594;-9,45E-02
910,094;-9,87E-02
912,594;-0,10347
915,094;-0,10719
917,594;-0,10845
920,094;-0,10657
922,594;-0,10219
925,094;-9,69E-02
927,594;-9,25E-02
930,094;-9,04E-02
932,594;-9,10E-02
935,094;-9,34E-02
937,594;-9,62E-02
940,094;-9,79E-02
942,594;-9,82E-02
945,094;-9,78E-02
947,594;-9,72E-02
950,094;-9,63E-02
952,594;-9,51E-02
955,094;-9,44E-02
957,594;-9,53E-02
960,094;-9,85E-02
962,594;-0,10292
965,094;-0,10669
967,594;-0,10828
970,094;-0,10764
972,594;-0,10609
975,094;-0,10502
977,594;-0,10457
980,094;-0,10382
982,594;-0,10214
985,094;-1,00E-01
987,594;-9,86E-02
990,094;-9,89E-02
992,594;-0,10123
995,094;-0,10509
997,594;-0,1095
1000,094;-0,11348
1002,594;-0,11624
1005,094;-0,11705
1007,594;-0,11547
1010,094;-0,11175
1012,594;-0,10731
1015,094;-0,10421
1017,594;-0,10382
1020,094;-0,10562
1022,594;-0,10786
1025,094;-0,1094
1027,594;-0,11069
1030,094;-0,11289
1032,594;-0,11644
1035,094;-0,12056
1037,594;-0,12395
1040,094;-0,12586
1042,594;-0,12643
1045,094;-0,12614
1047,594;-0,12515
1050,094;-0,12321
1052,594;-0,12013
1055,094;-0,11631
1057,594;-0,11313
1060,094;-0,11226
1062,594;-0,11438
1065,094;-0,11823
1067,594;-0,12149
1070,094;-0,12245
1072,594;-0,12144
1075,094;-0,12039
1077,594;-0,12113
1080,094;-0,12376
1082,594;-0,12657
1085,094;-0,12743
1087,594;-0,12533
1090,094;-0,12135
1092,594;-0,11681
1095,094;-0,11118
1097,594;-0,10732

In 'csv' (Am or Eu) format,
ignored (but necessary) if a file is uploaded •

Final mass, ashes

In sample. •

iT_init, iT_fin

(or: 1, 0)

Temperature indexes (0: last). •

Instead

"Instead" (replace). •

Initial guesses

Guesses for the parameters (n^(a) triples). •

yntNum1 & 2

(If both 0: ignored)

Numer. integrals. •

ynt_v

Integrals. (If all 0: ignored.) •

Expected

Expected (particular). •

xtol, ftol, maxiter

(-1 → 2500×#guesses)

Tolerances for x, y; max. iterations.

Show values

Show graph coordinates.

From Excel file (uploaded '.xlsx' or inserted '.csv'), computes the parameters for the pseudo-Gaussians, in a TG experiment, from the DTG data, and computes the compositions (4 in the base data, with 2.nd to 4.th: hemicellulose, cellulose, lignin).
^(a) Thus, n = 4 components.

The base 'csv' data lead to a run time of ~1 s, as well as the suggested 'xlsx' (which is the same). (NB: / not allowed in data.)

References:

Plate: DThermoGravComp

• Google: Thermogravimetry

• (Wikipedia) Thermogravimetric analysis.

• 1924-11-20: Mandelbrot, Benoît (†2010-10-14, 85 yrs.).

http://web.ist.utl.pt/~mcasquilho/compute/com/Q-qyrocomp.php
Created: 2021-11-20 — Last modified: 2021-12-23