A review on the fuel gas cleaning technologies in gasification process

Development of systematics ranked structure of environmental protecting equipment for cleaning of gas emissions, wastewater and solid waste

“…The work of [1] studies the filtration equipment used for purification of air and gases. Profound review of methods of gases purification from solid particles and other admixtures produced during gasification of coal or biomass is given in [2]. The analysis of efficiency of equipment for purification of gas emissions from finely dispersed suspended particles is made in [3].…”

“…The analysis of the literature [1][2][3][4][5][6][7] showed that the existing classification of EPE for the purification of gas emissions, wastewater and processing of solid waste cannot serve as a universal basis for the ordering of the growing diversity of EPE. This complicates the choice of necessary methods and equipment depending on the specific conditions of their exploitation.…”

Conceptual use of vortex technologies for syngas purification and separation in UCG applications

“…High-temperature syngas cleaning has been the focus of research for over three decades (Sharma et al, 2008), but a scientifically proven and tested technology has not yet been commercialized. Significant improvements have been achieved with candle filters in the past few years (Prabhansu et al, 2015); however, these conventional warm gas cleaning technologies have fundamental limitations due to the intrinsic material properties of candle filters that cause practical problems and lead to unacceptable availability. Sharma et al (2008) presented the status of syngas cleaning technologies for particulate removal systems and reviewed the practical problems and limitations faced by these gas cleaning systems.…”

“…The liquid fuel products produced by the FT unit must follow the Euro-5 specification, as required by South African legislation, therefore removal of HCN, NH 3 , Hg, Sb, Sn, sulphur compounds, metals, halogens (Cl and F), and several other trace components is required (Prabhansu et al, 2015; correspondence with several FT process licensors). The syngas clean-up system must dry the raw syngas and effectively capture (> 99.9%) all the trace elements listed in Table I, as well as remove all particulate matter.…”

“…Significant improvements in candle filters have been achieved in the past few years (Prabhansu et al, 2015); however, the reliability of these systems has never been successfully tested in a commercially integrated gasificationbased system environment. From the literature (Swanson and Hajicek, 2002;Guan et al, 2008), it is evident that most candle filters have operated for only a short period of a few thousand hours at 400°C, although they last much longer at lower temperatures of around 285°C (Scheibner and Wolters, 2002) in a coal gasification environment.…”