Analisis Pengaruh Variabel Proses pada Komposisi Syngas Biomassa Daun-Ranting di ITS Menggunakan Reaktor Circulating Fluidized Bed

Asivina, Syifa (2025) Analisis Pengaruh Variabel Proses pada Komposisi Syngas Biomassa Daun-Ranting di ITS Menggunakan Reaktor Circulating Fluidized Bed. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Gasifikasi adalah proses termokimia yang mengonversi biomassa padat, dalam hal ini daun dan ranting pohon menjadi gas mudah terbakar (syngas) seperti CO, CO₂, CH₄, dan H₂. Proses ini melibatkan tiga zona utama dalam reaktor gasifier tipe circulating fluidized bed (CFB), yakni devolatilisasi, oksidasi, dan reduksi. Parameter operasi pada gasifikasi sangat berpengaruh terhadap komposisi dan nilai kalori (LHV) syngas yang dihasilkan. Dalam penelitian ini, kami menganalisis pengaruh variasi equivalence ratio (ER), suhu operasi, LHV, dan rasio H₂/CO terhadap karakteristik syngas di reaktor CFB menggunakan simulasi Aspen Plus. Hasil simulasi menunjukkan bahwa nilai ER optimal adalah 0.15 pada suhu 1100 °C, di mana diperoleh LHV tertinggi sebesar 33627.28 kJ/kg. Selain itu, rasio H₂/CO ideal berkisar antara 0.5–1 pada rentang suhu 900–1100°C dengan ER antara 0.15–0.40. Temuan ini dapat menjadi acuan dalam pengoperasian reaktor CFB untuk menghasilkan syngas dengan kualitas energi (LHV) dan komposisi H₂/CO yang sesuai kebutuhan internal combustion.
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Gasification is a thermochemical process that converts solid biomass. In this case, tree leaves and twigs into combustible gases (syngas) such as CO, CO₂, CH₄, and H₂. The process involves tjamee main zones in a circulating fluidized bed (CFB) gasifier reactor: devolatilization, oxidation, and reduction. Operating parameters in gasification have a significant impact on the composition and lower heating value (LHV) of the produced syngas. In this study, we analyze the effect of variations in equivalence ratio (ER), operating temperature, LHV, and H₂/CO ratio on syngas characteristics in a CFB reactor using Aspen Plus simulations. The simulation results indicate that the optimal ER is 0.15 at 1100 °C, yielding the highest LHV of 33627.28 kJ/kg. Additionally, the ideal H₂/CO ratio ranges from 0.5 to 1 within the temperature window of 900–1100 °C at ER between 0.15 and 0.40. These findings can serve as a reference for operating CFB reactors to produce syngas with energy quality (LHV) and H₂/CO composition tailored to internal combustion requirements

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Circulating Fluidized Bed, Equivalence Ratio, Gasifikasi, Temperatur, Circulating Fluidized Bed, Equivalence Ratio, Gasification, Temperature
Subjects:	Q Science > QD Chemistry > QD281 Pyrolysis Q Science > QD Chemistry > QD502 Chemical kinetics T Technology > TP Chemical technology > TP155.7 Chemical processes. T Technology > TP Chemical technology > TP343 Liquid and gaseous fuel
Divisions:	Faculty of Industrial Technology > Physics Engineering > 30201-(S1) Undergraduate Thesis
Depositing User:	Syifa Asivina
Date Deposited:	30 Jul 2025 08:59
Last Modified:	30 Jul 2025 08:59
URI:	http://repository.its.ac.id/id/eprint/123789

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