- 學位論文
混合都市固態廢棄物氣化及合成氣催化重整反應之應用在固態燃料電池研究
Co-gasification and Syngas Reforming of Municipal Solid Waste for Solid Oxide Fuel Cells
摘要
本研究利用廢紙及塑膠的混合物，進行800oC高溫氣化，產製合成氣(syngas)，提供SOFC使用。為了避免毒化電池氧化物電極或腐蝕金屬電極，須要對此碳氫燃料執行純化及重整。研究利用陶瓷/高分子配料技術，選擇三種陶瓷粉體，包括氧化鋅、θ相氧化鋁粉、碳酸鈣，經雙滾筒捏練、擠出後，製造出可以直接餵料之線材，用於 3D 積層列印機，製造型塑後之陶瓷催化載體。陶瓷載體經過高分子燒除和特定堆疊方式不同，而擁有兩種孔洞分布及螺旋錐狀形體。三種陶瓷載體均勻鍍上鎳參雜氧化鈰奈米顆粒之複合型催化劑，進行生質燃料之氣化重整。因合成燃氣內會含有甲烷及硫化氫，本研究之催化載體用於重整反應後，甲烷在合成氣中含量可降至5%以下，氫氣與一氧化碳分別提升至50%和20%，硫化氫濃度從初始38.5ppm降至1ppm以下。
並列摘要
Removal sulfur in biofuel is important for the use of renewable energy in solid oxide fuel cells (SOFCs). The purification and reforming of hydrocarbon fuels are currently conducted to prevent poisoning of the oxide electrodes. This research reports previous formulation technique of ceramic/polymer kneading of several polymers with ceramic powders (ZnO, θ-Al2O3, and CaCO3), and extruding to produce feedstock of wire shape (filaments) in order to form catalytic ceramic supports. The pore size of ceramic supports shows two different distributions, due to polymer burnt-out and its stacking configuration. The effects of three Ni+CeO2 catalyst are investigated on simultaneously remove of H2S and hard particles, and reform CH4 at 800 °C. After reforming by the catalysts, the composition of fuel gas was changed as following: Concentration of CH4 decreasing to a lower level of <5%. Both concentrations of H2 and CO increase to more than 50% and 20%, respectively. The concentrations of hydrogen sulfide changed from 38.5 ppm to a level of 1 ppm.