Effect of Ni/Al2O3-SiO2 and Ni/Al2O3-SiO2 with K2O Promoter Catalysts on H2, CO and CH4 Concentration by CO2 Gasification of Rosa Multiflora Biomass

摘要

The thermal behaviour of the Rosa mutiflora biomass by thermogravimetric analysis was studied at heating rate 3?K?min~(?1 from ambient temperature to 950?°C. TGA tests were performed in high purity carbon dioxide (99?998%) with a flow rate 200?ml/min and 100?mg of sample, milled and sieved to a particle size below 250?μm. Moreover, yields of gasification products such as hydrogen (H_(2 ), carbon monoxide (CO) and methane (CH_(4 ) were determined based on the thermovolumetric measurements of catalytic (Ni/Al_(2 O_(3 -SiO_(2 and Ni/Al_(2 O_(3 -SiO_(2 with K_(2 O promoter catalysts) and non-catalytic gasification of the Rosa multiflora biomass. Additionally, carbon conversion degrees are presented. Calculations were made of the kinetic parameters of carbon monoxide and hydrogen formation reaction in the catalytic and non-catalytic CO_(2 gasification processes. A high temperature of 950?°C along with Ni/Al_(2 O_(3 -SiO_(2 and Ni/Al_(2 O_(3 -SiO_(2 with K_(2 O promoter catalysts resulted in a higher conversion of Rosa multiflora biomass into gaseous yield production with greatly increasing of H_(2 and CO contents. Consequently, H_(2 and CO are the key factors to produce renewable energy and bio-gases (synthesis gas). The parameters obtained during the experimental examinations enable a tentative assessment of plant biomasses for the process of large-scale gasification in industrial sectors.