[ABSTRAK
Sebagai salah satu gas rumah kaca, gas CO2 dan CH4 akan dikonversikan menjadigas yang berguna dalam reaktor plasma non-termal dengan konfigurasi umpan 3-lewatan, yang beroperasi pada suhu ruangan. Reaktor mempunyai keunggulandapat sekaligus mendinginkan elektroda tegangan tinggi pada proses reaksinyadan memanaskan awal umpan sebelum masuk zona plasma.Laju alir gas CO2 yang digunakan adalah 500-1.500 mL/menit dengan Time onStream (TOS) 2,1-8,4 menit, sedangkan pada reformasi gas CO2 digunakancampuran gas CO2/CH4 (1/1) dengan laju alir 9,19; 19,45 dan 85,43 mL/menitdengan TOS 140 menit, dan tegangan reaktor 12,27 kV. Dekomposisi gas CO2menghasilkan gas CO dan O2 dengan konversi rendah dan menurun kembalisetelah TOS 2,1 menit, karena adanya reaksi berbalik.Dari reformasi gas CO2 dihasilkan gas sintesis, H2 dan CO, C2H6 serta komponenC3. Konversi CO2 dan CH4 tertinggi dicapai pada laju alir 9,19 mL/menit yaitu36,73% dan 35,52%. Energi spesifik terbaik pada dekomposisi CO2 adalah 270kJ/mol, sedangkan pada reformasi CO2 adalah 2.333,5 kJ/mol. Analisis PSSHdapat memprediksi suhu lokal pada beberapa titik didalam reaktor, sebesar ratarata1425 K. Penelitian ini perlu dikembangkan sampai skala komersial dengankonversi dan efisiensi tinggi, untuk digunakan juga pada gas alam dengankandungan CO2 tinggi, menghasilkan gas sintesis dan juga hidrokarbon rantaipanjang sebagai bahan bakar cair melalui proses Fischer Tropsch.

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ABSTRAK
As one of the Greenhouse gas, CO2 and CH4 will be converted into valuable gasin the three-pass flow configuration of non-thermal plasma reactor that operatedin the room temperature. Reactor has advantage can simultaneously cool the highvoltage electrode during reaction process and preheat the feed before entering theplasma zone.The used of CO2 feed flow rates was 500-1,500 mL/minute with Time on Stream(TOS) between 2.1-8.4 minutes, and CO2 reforming used the mixture of CO2/CH4(1/1) with the feed flow rates of 9.19, 19.45 and 85.43 mL/minute until TOS 140minutes. The electrical voltage was 12.27 kV. The CO2 decomposition producedCO and O2 with low conversion and dropped off after TOS 2.1 minutes, due to theoccurrence of reverse reaction.The CO2 reforming process produced synthesis gas, C2H6 and C3 components.The highest CO2 and CH4 conversion reached 36.73% and 35.52%, respectively atthe feed flow rate of 9.19 mL/minute. The best specific energy in the CO2decomposition was 270 kJ/mol, while the CO2 reforming was 2,333.5 kJ/mol.Analysis of PSSH identified the local spots temperature inside the reactor, by anaverage of 1425 K. This research need to be developed into a high performanceand efficient commercial scale reactor, to be used also for high CO2 contentnatural gas, producing synthesis gas and also high chained of liquid fuelhydrocarbon through Fischer Tropsch processes, As one of the Greenhouse gas, CO2 and CH4 will be converted into valuable gasin the three-pass flow configuration of non-thermal plasma reactor that operatedin the room temperature. Reactor has advantage can simultaneously cool the highvoltage electrode during reaction process and preheat the feed before entering theplasma zone.The used of CO2 feed flow rates was 500-1,500 mL/minute with Time on Stream(TOS) between 2.1-8.4 minutes, and CO2 reforming used the mixture of CO2/CH4(1/1) with the feed flow rates of 9.19, 19.45 and 85.43 mL/minute until TOS 140minutes. The electrical voltage was 12.27 kV. The CO2 decomposition producedCO and O2 with low conversion and dropped off after TOS 2.1 minutes, due to theoccurrence of reverse reaction.The CO2 reforming process produced synthesis gas, C2H6 and C3 components.The highest CO2 and CH4 conversion reached 36.73% and 35.52%, respectively atthe feed flow rate of 9.19 mL/minute. The best specific energy in the CO2decomposition was 270 kJ/mol, while the CO2 reforming was 2,333.5 kJ/mol.Analysis of PSSH identified the local spots temperature inside the reactor, by anaverage of 1425 K. This research need to be developed into a high performanceand efficient commercial scale reactor, to be used also for high CO2 contentnatural gas, producing synthesis gas and also high chained of liquid fuelhydrocarbon through Fischer Tropsch processes]