Assessment on Modified Catalyst for Catalytic Fast Pyrolysis of Non-Recycled Plastic Wastes(2/3)

Concern has grown over the release of carbon dioxide from the combustion of fossil fuels and its linkwith global warming. In recent years, the technologies and strategies of CO2 reduction were developedactively by many countries. Biomass is a renewable resource with almost zero net CO2 emission since carbonand energy are fixed during the biomass growth. Compared with other renewable energy resources, biomassis huge in annual production with a geographically widespread distribution in the world. Furthermore,biomass is an easy-to-use energy sources, based on present technical level and economics. Therefore biomasshas been the focus of most of countries for sustainable energy production and also for the reduction ofgreenhouse gases emissions. Fast pyrolysis, a type of thermal-chemical process, has been received attentionthroughout the world due to the following advantages: (1) high heating and heat transfer rate: it usuallyrequires a suitable pretreatment to provide rapidly thermal reaction; (2) controlling pyrolysis reactiontemperature: it could be controlled ranged between 420℃ and 550℃; (3) short vapor residence time:typically below 2 seconds; (4) high quenching rate: pyrolysis vapors and aerosols are rapidly cooled to givehigh quality bio-oil. To further consider the wide application of energy conversion technology, possibility oftechnology development for the future, effectiveness of energy utilization and waste location, WtB (Waste toBiofuel) technology will become one of the important and potential energy conversion technologies inTaiwan. However, in Taiwan, little information has been developed about the technology of waste tobiofuel by fast pyrolysis. Recognizing the necessity and the importance of the problems, the main objectivesof this three-year project were to: (1) establish the characteristics of modified catalyst and kinetic of catalyticfast pyrolysis; (2) enhance the quality of biofuel and assess the characteristics of high-valued technology incatalytic fast pyrolysis; (3) assess the feasibility of hot-gas cleaning technique for flue gas produced fromnon-recycled plastic wastes in catalytic fast pyrolysis.