CHEMICA : Jurnal Teknik Kimia ISSN 2355-8776 Vol. 7, No. 2, December 2020, pp. 117-126 117 http://dx.doi.org/10.26555/chemica.v7i2.17451 http://journal.uad.ac.id/index.php/CHEMICA/ chemica@che.uad.ac.id Simulation of Dispersion Potential and Fatality Percentage of SO2 and CO2 Flue Gas from Combustion of Coal in West Lombok Power Plant using Gaussian Model Simulasi Potensi Dispersi dan Persentase Fatality oleh Gas Buang SO2 dan CO2 Hasil Pembakaran Batu Bara di PLTU Jeranjang Lombok Barat Menggunakan Gaussian Model Shafwan Amrullah a,1,* , Cyrilla Oktaviananda b,2 a Jurusan Teknologi Industri Pertanian Universitas Teknologi Sumbawa, Jalan Olat Maras, Batu Alang, Moyo Hulu, Sumbawa, 84371, Indonesia b Jurusan D3 Teknik Kimia Politeknik Katolik Mangunwijaya, Jalan Kusumanegara (Sriwijaya) No 104, Semarang , 50242, Indonesia 1 shafwan.amrullah@uts.ac.id *; 2 cyrillaoktaviananda.28@gmail.com * corresponding author 1. Pendahuluan Pembangkit Listrik Tenaga Uap (PLTU) batu bara merupakan penyumbang terbesar emisi udara terhadap kelangsungan lingkungan dan dapat mengancam keberadaan makhluk hidup didalamnya. Pembakaran batu bara menghasilkan gas buang yang sangat berbahaya bagi makhluk hidup, dimana dari pembakarannya dihasilkan gas buang berupa CO2, NOx, SOx, dan impuritis yang notabene merupakan gas yang sangat berbahaya bagi lingkungan. Hal ini semakin diperparah dengan kebijakan pemerintah Indonesia tentang ketahanan energi. Namun di lain pihak Pemerintah telah berkomitmen untuk merealisasikan penyediaan listrik sebesar 35 ribu Megawatt (MW) dalam jangka waktu 5 tahun (2014-2019), walaupun sampai sekarang masih berjalan. Sepanjang 5 tahun tersebut, pemerintah ARTICLE INFO ABSTRACT Article history Received July 26, 2020 Revised November 18, 2020 Accepted January 20, 2021 Combustion of coal in coal-fired power plants produces air pollution such as SO2, NOx, CO2, and Particulates. The Jeranjang power plant in West Lombok Regency uses 300,000 tons/year of coal to generate 75 MW of electricity. It can be a large potential for environmental pollution. This research aims to simulate the potential of SO2 and CO2 exhaust gas dispersion to the environment and the fatality percentage caused by burning the Jeranjang coal power plant using the Gauss Model. The research was conducted by a literature study and direct observation of PLTU Jeranjang. After that, in this research, the SO2 and CO2 concentration were calculated. At the end of the study, estimating the potential dispersion and fatality percentage by SO2 and CO2 gas was also calculated around the Jeranjang power plant. The results are SO2 dispersion with a dispersion mass of 0.145 kg/sec from a distance of 2,000 to 46,000 m increased from 1x10 -45 to 1.9x10 -5 ppm and decreased to 0 ppm. The fatality percentage y generated is 0%. The CO2 dispersion potential into the environment without a mass of 12.378 kg/sec increases at a distance of 2,000 to 58,000 m, from a concentration of 2.7x10 -65 to 0.00184 ppm. The CO2 concentration decreases to 0 ppm. The fatality percentage generated is 0%. The calculation of settlement dispersion around the PLTU Jeranjang can be safe from SO2 and CO2 dispersion, and the fatality percentage generated is 0%. This is an open access article under the CC–BY-SA license. Keywords Air pollution Coal-Fired Dispersion potential Fatality percentage Gauss Model