2000
DOI: 10.1081/ci-100100970
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Determination of the Immersion Enthalpy of Activated Carbon by Microcalorimetry of the Heat Conduction

Abstract: By means of a heat conduction microcalorimetric technique, the immersion heat in CCl 4 is determined for five samples of activated carbon, with results between -32.45 and -179.3 Jg -1 , presenting a precision for all cases less than 0.8%.With the results of the immersion heat, the total surface area is calculated; the obtained values are between 280 m 2 g -1 and 1500 m 2 g -1 indicating the difference in the superficial characteristics of the samples.

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Cited by 39 publications
(25 citation statements)
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“…De esta forma resulta útil la adsorción física de gases, específicamente N 2 A 77K y CO 2 a 273 K para establecer el área superficial (BET), volumen de poro entre otros parámetros, 7 así mismo se suele utilizar la calorimetría de inmersión. 8,9 En este trabajo se estudian seis muestras de monolitos tipo disco y honeycombs, sobre las que se determinan isotermas de adsorción y calorimetrías de inmersión en benceno, con los datos obtenidos se calcula el área BET, volumen de microporos, energía característica y entalpía de inmersión de cada muestra.…”
Section: Introductionunclassified
“…De esta forma resulta útil la adsorción física de gases, específicamente N 2 A 77K y CO 2 a 273 K para establecer el área superficial (BET), volumen de poro entre otros parámetros, 7 así mismo se suele utilizar la calorimetría de inmersión. 8,9 En este trabajo se estudian seis muestras de monolitos tipo disco y honeycombs, sobre las que se determinan isotermas de adsorción y calorimetrías de inmersión en benceno, con los datos obtenidos se calcula el área BET, volumen de microporos, energía característica y entalpía de inmersión de cada muestra.…”
Section: Introductionunclassified
“…Figure 6 overleaf shows the relationship between the enthalpies of immersion into benzene, as determined experimentally, and the surface areas, as obtained via the BET equation and MC simulations. According to previous work, the enthalpy of immersion in benzene should increase with the surface area (Moreno and Giraldo 2000). This regular trend is observed for the MCO samples in Figure 6(a), where the enthalpy value increased with increasing BET area in an almost linear fashion, with the exception of sample MCO32 which presented a high value for the enthalpy of immersion in benzene (147 J/g), but a surface area value very similar to the MCO36 monolith.…”
Section: Resultsmentioning
confidence: 61%
“…Such measurements were made in an electrically calibrated heat conduction Calvet microcalorimeter (Silvestre-Albero et al 2001;Moreno and Giraldo 2000) employing a stainless steel calorimetric cell. Known amounts of the solid samples (ca.…”
Section: Immersion Enthalpymentioning
confidence: 99%
“…calorimetric determination was used a heat conduction microcalorimeter with a stainless steel calorimetric cell 20 . Figure 2 shows the N 2 adsorption isotherms of the prepared activated carbons at 77K.…”
Section: Synthesis Of Activated Carbonsmentioning
confidence: 99%