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Title	Thermogravimetric study of calcium carbonate decomposition
Publication Type	thesis
School or College	College of Fine Arts
Department	Ceramics
Author	Hyatt, Edmond Preston
Date	1956
Description	An apparatus for making rapid thermogravimetric analysis was constructed from readily assembled standard parts. A chainweight balance with optical lever was adapted so the light beam registered on either of two photocells depending upon the direction of unbalance, Current from the photocells was amplified and used to drive a small reversing motor which added or subtracted chain on the balance as required, The motor drive also turned a linear potentiometer which drove an electronic strip chart recorder. A sample of thermally reactive material was suspended from one pan of the balance into an electrically heated tube furnace. The magnitude of the weight loss (or gain) occurring in the sample during the reaction is recorded instanteously by the electronic recorder. The above apparatus was used to follow the decomposition of calcium carbonate crystals under carefully controlled temperature' and atmospheric conditions. The rate of decomposition as derived from experimental evidence and kinetic considerations is given by the following expression, where the rate is given in weight loss per unit of area per unit of time; Rate = P C02 and 􁪽02 are the measured and equilibrium pressures of CO2, ii respectively; R is the rate of weight loss in nitrogen atmosphere; B is e temperature dependent and is experimentally determined,
Type	Text
Publisher	University of Utah
Dissertation Name	Doctor of Philosophy
Language	eng
Rights Management	© Edmond Preston Hyatt
Format	application/pdf
Format Medium	application/pdf
ARK	ark:/87278/s6zr6ttq
Setname	ir_etd
ID	2216274
Reference URL	https://collections.lib.utah.edu/ark:/87278/s6zr6ttq

Page Metadata

Title	Page 48
Format	application/pdf
Setname	ir_etd
ID	2216322
OCR Text	Show -37- Tble II - 1. (cont ) .. Rate, of Sample - Weight Loss Weight Loss CO2 Pressure Sample Temperature Area (mg/min) (mg'/mtn-cm 2) 4a76 4;):378 3(1673 3lf97 i, 219 20'·18 0" 13 o, 26 0..22 3 1 0(1458 10194 L676 2,,2 3.82 2.6 20<97 3,,88 let 84 2(128 1.51 i, 69 2094 0..,245 D269 0.(1326 0..30.9 Dci234 90.0. 4,,96 6.0 628 6432 7 19 3cJD3 900. 30'54 0.0'234 0. 216 0.020.9 0.,,20.9 00'183 7.6 8e'1 8a05 800.3 8ci5 3,,66 3cr89 3.86 4021 4.57 0.0159 0.159 0.0159 0.,,117 0..111 90.0 9b5 5948 6.8 6,,45 s, 2 4Q 81 5,,72 6_3 5,,89 5088 0.0.111 90.0. r, 199 lcr262 511 63 7(10.8 6,,9 4.10.7 1.9 Oa0925 0'10.925 o.i10426 000.426 00.454 90.0. !_ci42 14422 4.7 4.7 4.9 4C1B4 0462 10393 5.,72 40'1 404 0.,,0.903 0.0090.3 0.00.594 0..0.594 0.0396 90.0. 1A1724 1" 753 1.318 10'634 1.85 10:914 tt976 2.0.32 2.076 20:0.84 2.,088 1(1902 10869 10971 0.959 lQ078 1,,093 0. 884 .. 0..80.7 0.(1863 50'95 51r2 1,,01 5«4 3.178 3.67 0. 0.297 .. Oa076 0.00.54 2054 3.24 3,,28 3 20. .. 5o.8 6,,0.2 4.9 1015 (atm) 0.,,534 D761 o. 6'7 (OC) 90.0 o.w67 Oa245 .. 0. 0. 0. 0.
Reference URL	https://collections.lib.utah.edu/ark:/87278/s6zr6ttq/2216322