Catalytic Tar Removal from Bio‐Syngas via Oxidation on Metal Oxide Catalysts

Abstract

To diversify energy sources and to address the impacts of global warming, the transformation of biomass, a renewable energy source, into fuels and chemicals is becoming increasingly necessary. The gasification technology is an efficient way of converting biomass via syngas into sustainable fuels. By-products, especially tar, are formed during the gasification process and need to be removed before further downstream processing. Mo/V/W-mixed oxides were found to be applicable for the catalytic tar oxidation in CO/H 2 atmosphere by adding a stoichiometric amount of oxygen. In temperature-programmed experiments the reactivity of different tar model compounds during the selective oxidation on Mo/V/W-mixed oxides as well as the catalytic performances of V 2 O 5 , WO 3 , and MoO 3 during the tar oxidation were investigated.

Utilization of Bio-Syngas in Solid Oxide Fuel Cell Stacks: Effect of Hydrocarbon Reforming

“…Especially benzene and naphthalene are reported as tars with slow reforming kinetics. 50 Supporting cell tests using only one tar in simulated syngas have confirmed that while light tars like phenol are reformed in the support and do not affect the electrochemical performance (i.e. they do not reach the anode), 35,36 poly-aromatic tars such as naphthalene and phenanthrene decrease the electrochemical performance already at much lower concentrations and are therefore not completely reformed in the support 51,52 (see supplementary Figure S3).…”

Experimental Study on Catalytic Biomass Gasification in a Bubbling Fluidized Bed

“…Although gasification is an environmentally friendly and cost‐effective process, the technology still faces challenges such as tar formation, which has prevented its development and commercialization. Tar is a complex mixture of heavy hydrocarbons, including polycyclic aromatic hydrocarbons, which can cause serious problems such as blocking pipes and filters in the system .…”

“…At present, various methods have been proposed for tar conversion, the most important of which is using a catalyst. Up to now, many researchers have investigated the ability of catalysts in tar removal, hydrogen production, and char conversion by different methods of preparation , . These catalysts include natural ones such as dolomite and olivine as well as Ni‐based catalysts.…”