화학공학소재연구정보센터
Energy & Fuels, Vol.32, No.6, 6995-7001, 2018
Optimization of Hydrogen-Enriched Biogas by Dry Oxidative Reforming with Nickel Nanopowder Using Response Surface Methodology
Today, the worldwide research is focused on the development of alternative energy sources for power generation; thus, the present study aims to optimize the dry oxidative reforming (DOR) process parameters for H-2-enriched biogas production by integrating response surface methodology with a three-level, three-factor Box-Behnken design in the presence of commercial Ni nanopowder. First, the effect of CH4/CO2 and O-2/CH4 ratios on the catalytic performance of DOR was assessed in the temperature range of 800-900 degrees C. The reactant (CH4 and CO2) conversions, product (H-2 and CO) yields, selectivities of H-2 and CO, H-2/CO ratio, and specific energy consumption were chosen as responses. The empirical regression models were developed to identify the influential and most significant parameters. More than a 95% value of determination coefficients by analysis of variance proved that the developed regression models were highly satisfactory. Experimentally, a maximum H-2 enrichment of 38.7% with 82.9 and 90.8% CH4 and CO2 conversions, respectively, were achieved at optimal reaction conditions of 900 degrees C, 1.5 CH4/CO2 ratio, and 0.10 O-2/CH4 ratio. The combination of the regression model and dry oxidative technique for biogas reforming could provide an attractive proposition for enhancing the yield of H-2 in product gases with a subsequent increase in energy density and production of environmentally friendly gas.