11th International Combustion Symposium June 24th - 27th 2010, SARAJEVO AN ANALYSIS OF WATER GAS-SHIFT REACTOR BATTERY SYSTEM FOR SYNTHESIS GAS REFINEMENT A.M.Özbayoğlu a , C. Kasnakoğlu b , A. Güngör c , A. Bıyıkoğlu d , B.Z. Uysal e a TOBB University of Economics and Technology, Department of Computer Engineering, Ankara, Turkey b TOBB University of Economics and Technology, Department of Electrical Engineering, Ankara, Turkey c Nigde University, Faculty of Engineering and Architecture, Department of Mechanical Engineering, Nigde, Turkey d Corresponding Author: Gazi University, Faculty of Engineering, Mechanical Engineering Department, Ankara, Turkey e Gazi University, Faculty of Engineering, Chemical Engineering Department, Ankara, Turkey ABSTRACT In this study, a two-stage synthesis gas (SYNGAS) refinement process is modeled through the use of a water-gas- shift (WGS) reactor battery system. The process is controlled by adjusting the mixing ratio via a bypass line between the inlet and exit streams of the WGS reactor battery system, and the amount of steam supply into each reactor. Steam requirements and the amount of synthesis gas passing through the bypass line are determined by satisfying the constraints of the ratio of hydrogen to carbon monoxide at the exit of the system. The characteristic behavior of the battery system is obtained depending on the synthesis gas composition. As a result, the structured model cannot only refine the synthesis gas composition, but also identify the proper process parameters for a given coal type. Keywords: Water Gas-Shift reactor battery, synthesis gas refinement, two-stage process SENTEZ GAZI İYİLEŞTİRMESİ İÇİN SU GAZI DÖNÜŞÜM REAKTÖR BATARYA SİSTEMİNİN ANALİZİ ÖZET Bu çalışmada, iki kademeli sentez gazı iyileştirme prosesi, Su Gazı Dönüşüm (SGD) reaktör batarya sistemi kullanılarak modellenmiştir. SGD reaktör batarya sisteminin giriş ve çıkış akımları arasında bypass hattı ile karışım oranı ve her reaktöre gönderilen buharın miktarı ayarlanarak proses kontrol edilmiştir. Buhar gereksinimi ve bypass hattından geçen sentez gazı dönüşüm miktarı, sistem çıkışındaki hidrojen-karbon monoksit oranı sınırlamaları dikkate alınarak belirlenmiştir. Batarya sisteminin karakteristik davranışı, sentez gazı kompozisyonuna bağlı olarak elde edilmiştir. Sonuç olarak, yapısal model, sentez gazı kompozisyonunu iyileştirebilmesinin yanında, aynı zamanda, verilen bir kömür tipi için uygun proses parametrelerini tanımlayabilmektedir. Anahtar kelimeler: Su Gazı Dönüşüm reaktör bataryası, sentez gazı iyileştirme, iki-kademeli proses 1. INTRODUCTION Increasing energy demand has enormously forced human- being to develop new energy efficient technologies for the last century. Nevertheless, environmental factors have seemed to be forgotten during this period. Care should be taken of the protection of our environment from hazardous effects of bulk energy production by introducing new applicable methods. In this respect, integrated gasification combined cycle (IGCC) for power generation is one of the prominent alternatives. Besides, it should not be forgotten that the power generation systems based on gasification have always higher overall efficiency as compared to the conventional systems. Therefore, it seems that more attention would be payed to the production of syngas for power generation in the future. For all that, the application of gasification technology to power generation needs to be improved. There are numeruous contemporary studies related to the 1