ÖZETBu çalışmada, katalitik buharla yeniden yapılandırma (SR) yöntemiyle etanolden (C 2 H 5 OH, EtOH) hidrojen üretimi gerçekleştirilmiştir. Daha düşük sıcaklıkta daha yüksek verimde hidrojen üretiminin amaçlandığı çalışma heterojen fazda borusal bir reaktörde katalitik olarak gerçekleştirilmiştir. Emdirme tekniğinin kullanıldığı katalizör hazırlama deneylerinde destek maddesi olarak aktif karbon, aktif madde olarak Ni, Cu, Pd, NiO seçilmiş ve farklı oranlarda aktif bileşenler içeren, Ni-Cu-Pd/AC ve NiO-Pd katalizörleri hazırlanmıştır. Sentezlenen katalizlerin yüzey morfolojisi, alanı ve yapısına yönelik bazı karakteristik özellikleri (SEM, BET, EDS analizleri) de belirlenmiştir. Çalışmanın ikinci aşamasında, uygun kataliz ve tepkime koşullarının belirlenmesine yönelik; sabit besleme akış hızında, farklı besleme mol oranlarında (su/etanol mol oranı = 1,85, 4 ve 9) ve farklı sıcaklıklarda (300-700 o C) her bir katalizör üzerinde tepkime deneyleri gerçekleştirilmiştir. Hidrojen verimi ve hidrojen seçiciliklerine göre yapılan değerlendirmeler sonucunda NiO-%1Pd katalizörünün 500 o C'de, su/etanol mol oranı 9 iken % 97 hidrojen seçiciliği ile en yüksek performansı gösteren katalizör olduğu belirlenmiştir.Anahtar Kelimeler: Buharla yeniden oluşturma, etanol, Ni-Cu-Pd/AC ve NiO-Pd katalizörleri THE EFFECT OF WATER/ETHANOL MOL RATIO TO H 2 YIELD AND SELECTIVITY FOR HYDROGEN PRODUCTION FROM REFORMING OF ETHANOL WITH THE Pd-NiO, Ni-Cu-Pd/ACTIVATED CARBON CATALYSTS ABSTRACTIn this work, hydrogen production from catalytic steam reforming of ethanol (C 2 H 5 OH, EtOH) was carried. The purpose of producing high yield of hydrogen at lower temperatures was realized in a heterogeneous phase in a catalytic tubular reactor. The impregnation and sol-gel techniques were used in the preparation of the catalysts; the supporting material was chosen as activated carbon and the active materials were selected as Ni, Cu, Pd, and NiO. Using different ratios, Ni-Cu-Pd/AC and NiO-Pd catalysts were prepared. The surface morphology, surface area and structural characteristics of the synthesized catalysts (i.e., SEM, BET and EDS analysis) were determined. In the second phase of the work, the synthesized catalysts, constant feed flow rate, different feed mole ratio (water/ethanol mole ratio = 1.85, 4 and 9) and different temperatures (300-700 o C) were used for each catalytic reaction experiment that was carried out . The evaluation of the results based on hydrogen yield and hydrogen selectivity reveal that the NiO-%1Pd catalyst used at 500 o C with the feed having water/ethanol mol ratio 9, the selectivity being % 97 has the highest performance.
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