TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The particulate catalyst used in the homologation reactor is a modified molybdenum sulfide based catalyst; and contains at least molybdenum and/or cobalt and/or copper and is preferably promoted by the addition of an alkali metal salt. The resulting product stream from the homologation reactor of step a) (stream A) is treated so as to remove any sulfur present by the use of a sulfur guard bed. The optional separation of step c) and the separation of step ii) are respectively performed by using a H2/CO2 membrane that are preferably based on a polymer packaged as a hollow fiber.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Process: The method involves step j) where the stream C from step h is separated into a stream J comprising essentially methanol which is then preferably recycled into the homologation reactor of step a), and a stream K comprising essentially the ethanol and propanol(s) alcohols. The conversion of hydrocarbons to alcohols involves: i) converting hydrocarbon in a syngas reactor into a stream S consisting of a mixture of carbon oxide(s) and hydrogen having a (H2-CO2):(CO+CO2) molar ratio of at least 2, ii) separating stream S into a stream T' having a (H2-CO2):(CO+CO2) molar ratio between 0.5 and 2 and a stream T having a (H2-CO2):(CO+CO2) molar ratio higher than 3, iii) using stream T' as the carbon oxide(s) and hydrogen feed source of step a), and converting it in the homologation reactor into stream A, iv) using stream T as the carbon oxide(s) and hydrogen feed of step d) (optionally also comprising stream D of step c)), and converting the (mixed) stream T (and D) in the methanol reactor into stream E, and v) proceeding with the steps. The stream F is recycled back into the methanol reactor of step d). The (H2-CO2):(CO+CO2) molar ratio of stream S obtained from the syn gas reactor is of at least 2 (preferably 2.1 - 3, most preferably 2.4 - 2.8). Stream T has a (H2-CO2):(CO+CO2) molar ratio of higher than 3, and contains more than 90 mol.% H2. The (H2-CO2):(CO+CO2) molar ratio of the feed introduced into the homologation reactor is between 0.5 and 2 (preferably 0.8 - 1.3). The stream D' is recycled to the syngas conversion reactor as feedstock and/or fuel and optionally at least part of it is recycled to the homologation reactor. At least part of stream B is also used as a feed to the methanol reactor. At least part of stream J (preferably all of stream J) is recycled back into the homologation reactor.Preferred Components: The particulate catalyst used in the homologation reactor is a modified methanol based catalyst and/or a modified Fischer-Tropsch catalyst. The optional separation under step c) is performed.