The use of hydrogen as an energy vector and raw material for ââ?¬Å?very clean liquid fuelsââ?¬Â\nmanufacturing has been assessed by the catalytic conversion of CO2 to methanol over copper\nbased catalysts. A systematic evaluation of copper based catalysts, prepared varying the chemical\ncomposition, has been carried out at 0.1ââ?¬â??5.0 MPa of total pressure and in the range of 453ââ?¬â??513 K by\nusing a semi-automated LAB-microplant, under CO2/H2 reactant mixture (1/3), fed at GHSV of\n8.8 NLÃ?·kgcat\nâË?â??1Ã?·hâË?â??1. Materialââ?¬â?¢s properties have been investigated by the means of chemical-physical\nstudies. The findings disclose that the addition of structure promoters (i.e., ZrO2/CeO2) strongly\nimproves the textural properties of catalysts, in term of total surface area and exposure of metal\nsurface area (MSA), also reducing the sintering phenomena. The results of the catalytic study clearly\nprove a structure-activity relationship at low reaction pressure (0.1 MPa), while at higher pressure\n(3.0ââ?¬â??5.0 MPa) the reaction path is insensitive to structure and chemical composition.
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