Development of a Tar Reforming Catalyst for Integration in a Ceramic Filter Element and Use in Hot Gas Cleaning

Abstract

The development of a suitable tar reforming catalyst for integration in a ceramic hot gas filter element is presented. Calcined dolomite, CaO-Al 2 O 3 mixed oxide, and MgO were used as catalyst supports with a grain size fraction between 0.1 and 0.3 mm for Ni doping. The activity of the catalysts with regard to the benzene and naphthalene conversion with and without additional Ru doping was examined. A MgO supported Ni catalyst with a NiO loading of 6% was found to be the most active catalyst in naphthalene reforming in the presence of 100 ppmv H 2 S at 800°C and a filtration velocity of 90 m/h using model biomass gasification gas containing 5 g/N m 3 naphthalene. Complete naphthalene conversion was still achieved after 100 h. After integration of the MgO-Ni catalyst in the ceramic filter element, a differential pressure increase of 6.8 mbar at 25°C was measured, thus indicating the technical relevance of the developed catalyst for use in hot gas cleaning of biomass gasification gas.

Tar abatement for clean syngas production during biomass gasification in a dual fluidized bed

“…Therefore, a hot and clean gas is obtained at the outlet of the gasifier with reduced investment costs. Three different types of manufacture processes for catalytic filters have been described in literature [13,14].…”

“…The high temperatures used in the manufacturing process led to grain sintering and therefore to losses in the active surface of the catalyst [13]. Catalytic filters produced under the other two processes have been optimized and tested under different …”

Upgrading of Raw Gas from Biomass and Waste Gasification: Challenges and Opportunities

“…Fig. 5 Schematic designs of a a a-alumina based candle with catalyst deposited onto the pore walls [52] and b a cylindrical layer fixed bed based catalytic filter element [53] Top Catal (2011) 54:949-959 957…”

“…An interesting example is to integrate catalytic tar cracking in a barrier particulate filter. This was first proposed for combustion applications by Saracco and Montanaro [50] and further elaborated to gasification applications by research groups at Vrije Universiteit Brussel, Belgium [51][52][53][54][55], University of L'Aquila, Italy [56,57] and TU Delft, The Netherlands [58], all in cooperation with Pall Filtersystems GmbH Werk Schumacher, Crailsheim, Germany. Schematics of two different designs, (a) deposits of Ni/MgO catalyst onto the pore walls in a-alumina in a candle [52] and (b) a catalytically active fixed bed in a cylindrical catalytic filter element [53], are shown in Fig.…”

Fabrication of porcelain foam substrates coated with SiC, Ni, and Cr using the dip-coating technique

“…Ceramic coating materials have received considerable attention due its ability to withstand high temperature, resistance to corrosion, wear and tear, extension of material service life, economic consideration, and improvement of certain other material properties such as strength and conductivity (thermal and electrical). This kind of coated ceramic substrates have been utilized in a wide range of applications such as the filtration process [1], membrane layer for micro and ultra-filtration [2], separator [3], catalyst [4], and porous media burner applications [5]. Recently, Mueller et al [5] used porous alumina substrate dip-coated with SiC in a porous medium burner (PMB).…”