|
|
|
|
NON-ISOTHERMAL CALCINATION KINETICS OF PHOSPHATE ROCK
|
|
|
|
|
|
|
|
نویسنده
|
BAYRAKÇEKEN Hatice ,NAKTİYOK Jale ,OKUR Hüseyin ,ÖZER A. Kadir ,GÜLABOĞLU M. Şahin
|
|
منبع
|
pamukkale university journal of engineering sciences - 2014 - دوره : 20 - شماره : 7 - صفحه:266 -271
|
|
چکیده
|
The kinetics of thermal decomposition of the phosphate rock was studied by means of thermal analysis techniques (tg/dtg) in inert nitrogen (n2) atmosphere at heating rates of 2, 5, 10, and 20 k min^-1. tg and dtg measurements indicated that calcination of the phosphate rock has single-stage degradation in between 873-1173 k. kissinger–akahira–sunose (kas) and flynn-wall-ozawa (fwo) isoconversional methods were applied to the data obtained from tg and dtg curves and the activation energies were found as 170 ve 187 kjmol^-1, respectively. it was determined that the thermal decomposition mechanism of phosphate rock was occurred via nucleation and growth (-ln(1-α)^2/3) mechanism. pre-exponentional factor (lna) was determined as 20.47.
|
|
کلیدواژه
|
Phosphate rock ,Isoconversional methods ,Activation energy ,Non-isothermal kinetic analysis
|
|
آدرس
|
Atatürk Üniversitesi, Mühendislik Fakültesi, Kimya Mühendisliği Bölümü, Turkey, Atatürk Üniversitesi, Mühendislik Fakültesi, Kimya Mühendisligi Bölümü, Turkey, Atatürk Üniversitesi, Mühendislik Fakültesi, Kimya Mühendisligi Bölümü, Turkey, Atatürk Üniversitesi, Mühendislik Fakültesi, Kimya Mühendisligi Bölümü, Turkey, Atatürk Üniversitesi, Mühendislik Fakültesi, Kimya Mühendisligi Bölümü, Turkey
|
|
پست الکترونیکی
|
msahin@atauni.edu.tr
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Authors
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|