Decomposition of Potassium Hydrogen Carbonate: Thermochemistry, Kinetics, and Textural Changes in Solids.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F19%3A00502095" target="_blank" >RIV/67985858:_____/19:00502095 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27730/19:10241565 RIV/60461373:22320/19:43917768

Výsledek na webu

<a href="http://hdl.handle.net/11104/0294038" target="_blank" >http://hdl.handle.net/11104/0294038</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.iecr.8b06151" target="_blank" >10.1021/acs.iecr.8b06151</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Decomposition of Potassium Hydrogen Carbonate: Thermochemistry, Kinetics, and Textural Changes in Solids.

Popis výsledku v původním jazyce

To determine unbiased rates of the decomposition of KHCO3, slowly increasing- and constant-temperature TGA methods were employed with small, finely ground samples. Such reaction provides a novel, porous, and highly reactive sorbent for noxious and/or malodorous gases. The bicarbonate commences decomposing at 364 K, and the maximum rate of reaction, attained at 421.9 K, amounts to 5.73 × 10–4 1/s. Taking advantage of the Schlömilch function, an Arrhenius-type relationship is developed by an integral method: the activation energy is as large as 141.3 kJ/mol and the order of reaction amounts to 1.145. While the pore volume made by calcination (0.2309 cm3/g) is not affected by temperature at 403–503 K, the mean pore diameter and the grain size augment with increasing temperature. The diagram presented makes it possible to conveniently predict the conditions to attain near-complete conversion of the bicarbonate and minimize undesirable sintering of the nascent carbonate.

Název v anglickém jazyce

Decomposition of Potassium Hydrogen Carbonate: Thermochemistry, Kinetics, and Textural Changes in Solids.

Popis výsledku anglicky

To determine unbiased rates of the decomposition of KHCO3, slowly increasing- and constant-temperature TGA methods were employed with small, finely ground samples. Such reaction provides a novel, porous, and highly reactive sorbent for noxious and/or malodorous gases. The bicarbonate commences decomposing at 364 K, and the maximum rate of reaction, attained at 421.9 K, amounts to 5.73 × 10–4 1/s. Taking advantage of the Schlömilch function, an Arrhenius-type relationship is developed by an integral method: the activation energy is as large as 141.3 kJ/mol and the order of reaction amounts to 1.145. While the pore volume made by calcination (0.2309 cm3/g) is not affected by temperature at 403–503 K, the mean pore diameter and the grain size augment with increasing temperature. The diagram presented makes it possible to conveniently predict the conditions to attain near-complete conversion of the bicarbonate and minimize undesirable sintering of the nascent carbonate.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20402 - Chemical process engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Industrial and Engineering Chemistry Research

ISSN

0888-5885

e-ISSN

—

Svazek periodika

58

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

14

Strana od-do

2868-2881

Kód UT WoS článku

000460199800025

EID výsledku v databázi Scopus

2-s2.0-85062104267