Konversi Batubara Menjadi Syngas Menggunakan Metode Gasifikasi Dengan Variasi Air Fuel Ratio

Abstract

Coal is one of the natural resource commodities produced from mining activities in Indonesia and is a strategic mining material in the supply of energy sources. Especially for Banten , coal were found in South Banten Bayah. Gasification is a solution for the use of coal. Coal gasification is the process of converting solid coal into a gas mixture. The main reactions that occur are the water gas, boundouard and water gas-shift reactions. This study aims to determine the effect of Air Fuel Ratio (AFR) gasifications in the Banten Bayah Natural coal gasification process which produces synthesis gas with an H₂/Co Ratio 2. The measured parameters are the composition of H₂ and CO gases using Gas Chromatography. The gasification process is carried out with an updraft fixed bed reactor using steam medium on a 14 mesh coal size of 300 grams with AFR variations of 1.5, 2 and 2.5 with temperature 800^oC. The activation energy of the gasification reaction can be reduced by using Ca(OH)₂ catalysts as much as 3% of the mass of coal. From the research results obtained the best H₂/CO ratio syngas gas composition at AFR 1.5 temperature 800^oC using Ca(OH)₂ catalyst which is 1.98 with H₂ gas composition 33.8% and CO gas 17.1%..