The integration of low temperature supercritical water gasification with continuous in situ nano-catalyst synthesis for hydrogen generation from biomass wastewater
نویسندگان
چکیده
A continuous hydrothermal process is demonstrated, for the first time, that can operate at low gasification temperature (430 °C) and residence time (20 s) by combining supercritical water (SCWG) partial oxidation with in situ synthesis of virgin metal oxide nano-catalyst. Using olive wastewater as feedstock, this study experimentally investigated impact multiple variables: (1) COD feed concentration, (2) different nano-catalysts, (3) coefficient (?) (4) nano-catalyst precursor solution concentration. The optimum conditions generation hydrogen methane from were a 38.6 g/L, ? = 0.8, 60 mM concentration Fe2O3 These optimised further using spent lees stillage. efficiency yields reduction order stillage > wastewater. highest molar selectivity, 18.8 %, 17 11.4 mol/(kg biomass) respectively obtained feedstock. Gasification, TOC efficiencies 68.8–71.7 72.6–76.5 % 53.9–55.7 respectively, process. Importantly, novel approach prevents any performance drop or catalyst deactivation during operation. This exemplifies co-generation SCWG promising economically feasible direction large-scale types biomass < 450 °C, whilst lowering its TOC. (249 words)
منابع مشابه
Gasification of biomass in supercritical water (SCWG)
Conversion of wet biomass via gasification in supercritical water is a promising technology for the production of hydrogen and methane from renewable resources. The properties of water above the critical point enable reactions for the fast degradation of biomass and generation of a product gas consisting of hydrogen, methane, higher hydrocarbons and carbon dioxide without disturbing sulphurand ...
متن کاملHydrogen rich gas production via nano-catalytic gasification of bagasse in supercritical water
Ru/Al2O3 nano-catalysts were prepared with impregnation and microemulsion techniques. The supercritical water gasification reaction was performed at 400oC and 5-60 min. Within the tested operation conditions, the reaction residence time of 15 min was the optimum to maximize the H2 yield. It was observed that using microemulsion technique increases the total gas yield significantly. Using microe...
متن کاملnano-rods zno as an efficient catalyst for the synthesis of chromene phosphonates, direct amidation and formylation of amines
چکیده ندارد.
Hydrogen Production by Supercritical Water Gasification of Wastewater from Food Waste Treatment Processes
Korean food wastes have high moisture content (more than 85 wt%) and their major treatment processes such as drying or biological fermentations generate concentrated organic wastewater (CODs of about 100,000 mgO2/L). For obtaining both wastewater treatment and hydrogen production from renewable resources, supercritical water gasification (SCWG) of the organic wastewater was carried out in this ...
متن کاملApplication of Combined Catalyst/Sorbent on Hydrogen Generation from Biomass Gasification
Air-blown gasification of biomass in fluidized bed reactors produces relatively low concentrations of hydrogen. The combination of a catalyst and calcium-based sorbent is being developed to increase the efficiency of converting producer gas from biomass gasification into hydrogen. The conversion process entails reforming the methane and tar, and converting carbon monoxide into hydrogen by the w...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Chemical Engineering Journal
سال: 2023
ISSN: ['1873-3212', '1385-8947']
DOI: https://doi.org/10.1016/j.cej.2022.140845