Perovskite sensing materials for syngas composition monitoring and biomass gasifier numerical model validation: A preliminary approach

Abstract

Abstract. Biomass gasification represents a suitable choice for global environmental impact reduction, but more efforts on the process efficiency need to be conducted in order to enhance the use of this technology. Studies on inputs and outputs of the process, as well as measurements and controls of syngas composition and correlated organic and inorganic impurities, are crucial points for the optimization of the entire process: models of the system and sensing devices are, thus, very attractive for this purpose. In particular, perovskite based chemoresistive sensors could represent a promising technology, since their simplicity in function, relatively low cost and direct high temperature operation. The aim of this work is to develop a steam fluidized bed biomass gasifier model, for the prediction of the process gas composition, and new perovskite compounds, LaFeO 3 based, as sensing material of chemoresistive sensors for syngas composition and impurities measurements. Chemometric analysis on the combustion synthesis via citrate-nitrate technique of LaFeO 3 was also performed, in order to evaluate the relationship between synthesis conditions and perovskite materials and, thus, sensor properties. Performance of different sensors will be tested, in next works, with the support of the developed gasifier model.

Optimization of Working Conditions for Perovskite-Based Gas Sensor Devices by Multiregression Analysis

“…For these reasons, the research is currently focused on developing facilitative technologies to control the conventional unsustainable technology in order to convert it to a sustainable one. In this scenario, chemical sensing devices play a key role because they are used for monitoring the environmental impact of the industrial process, for checking the plant safety, and for controlling by feedback actions the productive system sustainability in order to improve the energetic, ecological, and productive efficiency [3][4][5].…”

A novel real-time monitoring and control system for waste-to-energy gasification process employing differential temperature profiling of a downdraft gasifier

“…However, continuous and accurate analysis of syngas composition requires complicated gas sampling mechanism and purification system to remove impurities (i.e., particles, tar compounds, corrosive gases and moisture) that would otherwise contaminate downstream analytical equipment (Sampson and Leroy, 2013). Advanced sensing devices that can measure the composition of syngas operating in a harsh environment are still under development (Ghosh and Loloee, 2007;Ögren et al, 2018;Pallozzi et al, 2016). While the fuel could be homogenized and controlled by applying different pre-treatment systems (e.g.…”