PINAR ACAR BOZKURT, Sibel KOÇ, ZARİFE MISIRLIOĞLU, Muammer CANEL

Effect of Demineralization Process on the CO2Gasification of Lignite

The effect of different demineralization process on CO2 gasification of cokes obtained from Karaman / Ermenek lignite at different temperatures was investigated in this study. 10% and 20% hydrochloric acid (HCl), nitric acid (HNO3) and sulfuric acid (H2SO4) solutions were used in the demineralization process. The demineralized lignite samples were subjected to coking process at the temperatures ranging between 500C‐800C, and the reaction capabilities of the obtained cokes in the gasification reaction with CO2 at the temperatures ranging between 900C–975C were determined. The reaction capabilities of the demineralized lignite samples during CO2 gasification were observed to be lower than those of the samples untreated with acid. In addition, it was observed that the reaction capabilities of cokes increased with increasing of coking temperature.

Demineralizasyon İşleminin Linyitlerin CO2 ile Gazlaştırılmasına Etkisi

Bu çalışmada, Karaman / Ermenek linyitine uygulanan demineralizasyon işleminin, farklı sıcaklıklarda elde edilen kokların CO2 ile gazlaştırılmasına etkisi incelenmiştir. Demineralizasyon işleminde, % 10’luk ve % 20’lik hidroklorik asit (HCl), nitrik asit (HNO3) ve sülfürik asit (H2SO4) çözeltileri kullanılmıştır. Demineralize edilmiş linyit numuneleri, 500C‐800C sıcaklık aralığında koklaştırma işlemine tabi tutulmuş ve elde edilen kokların, 900C–975C aralığındaki sıcaklıklarda CO2 ile gazlaştırma reaksiyonundaki tepkime yetenekleri belirlenmiştir. Mineralleri uzaklaştırılmış numunelerin CO2 ile gazlaştırılmaları sırasındaki tepkime yeteneklerinin, asitlerle işlem görmemiş numunelerinkine göre daha düşük olduğu gözlenmiştir. Ayrıca, asitlerle yıkanmış numunelerin maruz bırakıldığı koklaştırma işleminin sıcaklığı arttıkça, kokların tepkime yeteneğinde de artış gözlenmiştir.

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