TiO2 katkılı Al2O3 nanopartikülleri ile katalize edilen talaş pirolizinden hidrojen üretimi

Abstract

Yapılan çalışmada, TiO2 katkılı Al2O3 nanopartikülleri ile katalizlenen talaş pirolizinin hidrojen üretimi reaksiyonu 600, 700 ve 800 ℃ sıcaklıkta incelenmiştir. Kullanılan katalizör, talaşın katalitik pirolizinden hidrojence zengin sentez gazı üretimi için, ıslak emdirme yöntemiyle sentezlenmiştir. TiO2 katkılı Al2O3 nanopartiküllerinin karakterizasyonu, X ışını kırınımı (XRD) ve Taramalı Elektron Mikroskobu (SEM) kullanılarak gerçekleştirilmiş, üretilen hidrojence zengin gaz ürünü gaz kromatografisi (GC) ile analiz edilmiştir. Kullanılan TiO2 katkılı Al2O3 katalizörü ile talaşın 800 °C’deki pirolizinde en yüksek H2 verimi 17.04 mol/kg biyokütle ve en yüksek sentez gazı verimi 0.72 Nm3/kg biyokütle olarak gözlenmiştir. Ayrıca sentezlenen katalizör ile yapılan talaş pirolizinde karbon dönüşüm oranı %53,6 olarak tespit edilmiştir. Katalitik olmayan talaş pirolizi deneyine kıyasla, TiO2 katkılı Al2O3 nanopartikül ilavesinin talaş pirolizinden hidrojen üretimini yaklaşık %50 arttırdığı gözlenmiştir.

Keywords

• Hidrojence zengin gaz üretimi
• TiO2/Al2O3 nanopartikülleri
• Katalitik biyokütle pirolizi

Hydrogen Production from Sawdust Pyrolysis Catalysed by TiO2 Impregnated Al2O3 Nanoparticles

Abstract

In the present study, the hydrogen production of wood sawdust pyrolysis catalysed by TiO2 impregnated Al2O3 (TiO2/Al2O3) was investigated under temperatures of 600, 700 and 800 ℃. The catalyst preparation was made by wet impregnation method for enhanced hydrogen-rich gas production from catalytic pyrolysis of sawdust. Characterization and morphology of TiO2 doped Al2O3 nanoparticles were performed using X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) and the gas product was analysed by gas chromatography. The presented TiO2 doped Al2O3 catalyst showed the highest H2 yield in sawdust pyrolysis as 17.04 mol/kg, and gas productivity 0.72 Nm3/kg biomass at temperatures of 800 °C. Furthermore, the carbon conversion rate of the sawdust pyrolysis was detected as 53.6% with the TiO2 doped Al2O3 catalyst. It was observed that TiO2 doped Al2O3 nanoparticles supplementation approximately 50% increased the hydrogen production of sawdust pyrolysis, compared to non-catalytic experiment of sawdust pyrolysis.

Keywords

• Hydrogen production
• TiO2/Al2O3 nanoparticles
• Catalytic pyrolysis
• Wood sawdust
• Biomass

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