NEW LANTHANA-ALUMINA PROMOTED CATALYST FOR TAR CONVERSION IN SEWAGE SLUDGE GASIFICATION: CATALYTIC REFORMING VS. THERMAL PROCESS USING TOLUENE AS TAR MODEL COMPOUND

摘要

In this work, new nickel lanthana promoted catalyst was synthesized, tested and compared with thermalrntar conversion process. An alternative analysis method implemented allows taking measure of product distributionrnand tar conversion estimation in continuous way by GC-mass spectrometry, overcoming the problems ascribed to therndiscontinuous method proposed by the Technical Specification CEN/TS 15439. The catalyst synthesized showed totalrntoluene conversion without by-products (tar) at 500℃ when was submitted to a sludge gasification simulated gasrnstream using toluene as a model tar compound in a concentration of 25 g·m~(-3). Catalyst was tested in a long-termrnexperiment up to 110 h at 700℃, showing total toluene conversion without by-products presence (tar), whichrndemonstrate that this catalyst could be implemented in a bench scale gasifier to be tested in real conditions.