Abstract
A small laboratory fluidized bed reactor is used to test the chemical reactivity of solid particles fluidized with a gas. The novelty of the system is that it can be used for testing any solid particles, and, in this work, oxygen carriers with Mn/Si oxide supported on TiO2 are used to present the possibilities and layout of the laboratory system. The system is equipped with automatic valves that make it possible to rapidly change the gas conditions in the reactor. The setup facilitates solid particle testing using a sample of a few grams with gas-solid contact conditions relevant for a full-scale fluidized bed. With this small system, it is possible to mimic a section or a part of a larger system. It is also possible to test extreme conditions that can occur in a bigger unit. The system is designed for determining chemical reactivity in combustion, gasification, and reforming, but it can be used for investigating any type of gas-solid reaction in fluidized bed conditions. The setup presented here is one of the smallest possible devices that can be realized while maintaining fluidized bed conditions.
Highlights
Fluidized beds are commonly used in a wide range of applications such as the energy sector, the food industry, as well as process and chemical engineering
The primary purpose of this article is to present the general layout of a small laboratory fluidized bed quartz reactor
The setup here is one of the smallest possible systems that can be realized while maintaining fluidized bed conditions, which makes it possible to evaluate chemical properties and behavior
Summary
Fluidized beds are commonly used in a wide range of applications such as the energy sector, the food industry, as well as process and chemical engineering. The applications that use fluidized beds are mostly large-scale units, often with tons of materials at elevated temperatures. These conditions are difficult to scale down, which makes it hard to develop and test solid particles at conditions relevant for large-scale operation. The primary purpose of this article is to present the general layout of a small laboratory fluidized bed quartz reactor. Work on new oxygen carriers with Mn/Si oxide supported on TiO2 is presented. The purpose of this is partly to show the feasibility of these materials as oxygen carriers and to present the possibilities and the layout of the laboratory system. Possible fetchers of the system, not used to obtain the result detailed in this work, are included
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