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The catalytic pyrolysis of palm oil wastes for fuel gas production was experimentally investigated in a combined fixed bed reactor using the developed nano-NiO/γ-Al2O3 catalyst. The results indicated that the nano-NiO/γ-Al2O3 catalyst had greater activity for the cracking of tar in vapor and of hydrocarbons and a higher hydrogen yield than the commercial nickel-based catalyst in catalytic pyrolysis...
Experimental research on hydrogen production by gasifying larch sawdust which was studied in supercritical water via a batch-type autoclave. And alkaline compound K2CO3 was used as catalyst under the experimental condition of 450°C and 30MPa. Gas phase products and liquid phase products were analyzed by gas chromatograph and gas chromatography-mass spectrometer respectively. Liquid phase products...
Eupatorium adenophorum Spreng can potentially be utilized in several bioenergy pathways. When pretreated with microbial inoculum, it can be used as biogas fermentation material, which could increase the biogas production velocity. Eupatorium adenophorum Spreng is a promising potential biogas feedstock, whose rate of gas generation is 180 (m3-t_1TS) and fuel conversion efficiency is 12.37% at 30°C...
In this study, biomass catalytic gasification process for producing H2-rich gas was presented. The process consists of mainly two fluidized beds-a gasifier and a CaO regenerator. The objective of this research is to develop a computer model of biomass catalytic gasification. A model was developed using Aspen Plus software. The model predicted gas composition and hydrogen yield in good agreement with...
Hydrogen has the potential to be a sustainable alternative to the fossil fuels currently used in the transportation sector. The aim of our study is to appoint that producing hydrogen from biomass can be considered a green technology. There are three options for producing hydrogen from biomass. Our efforts must be focused on maximizing the reforming and shift conversions along with maximum economical...
The catalytic steam gasification of municipal solid wastes (MSW) for syn-gas production was experimentally investigated in a combined fixed bed reactor using the newly developed tri-metallic catalyst. A series of experiments have been performed to explore the effects of catalyst presence, catalytic temperature, catalyst to MSW weight ratio (C/M) and steam to MSW ratio (S/M) on the composition and...
With the concern of future energy use, hydrogen is taken as an important role in energy alternatives. In addition, biomass air gasification by using fluidized bed is an efficient and advanced method for hydrogen production. Despite of energy product generation, some pollutants such as PAHs easily formed in gasification process because of tar decomposition. Accordingly, this study provides a fundamental...
The catalytic steam gasification of municipal solid wastes (MSW) for fuel gas production was experimentally investigated in a combined fixed bed reactor using the newly developed nano-NiO/γ-Al2O3 catalyst. A series of experiments have been performed to explore the effects of catalyst presence, catalytic temperature, steam to MSW ratio (S/M) and MSW particle size on the composition and yield of gasification...
The paper reviewed hydrogen production biotechnology on theoretical and scientific aspects in our lab. Fermentative process is better for hydrogen production than photosynthetic process. The fermentative process, ecology of the activated sludge system, bacteriology of anaerobes, engineering control, reactor design, and fundamental research have made a great progress. At present, the demonstration...
The performance of anaerobic hydrogenation was evaluated in a continuous stirred-tank reactor (CSTR) operated at different influent chemical oxygen demand (COD) concentration with selectively enriched anaerobic mixed consortia in this present study. Waste molasses was used as a model substrate. The CSTR was started at a hydraulic retention time (HRT) of 8 hours with a temperature of (35±1)°C. Four...
The effect of hydraulic retention time (HRT) on the performance of hydrogen production from beet sugar wastewater by anaerobic fermentation using mixed microbial communities was investigated in a continuous stirred-tank reactor (CSTR) in this present study. A CSTR was designed and its performance was determined at various HRT. The goal was to find the optimal HRT for hydrogen production, to minimize...
Hydrogen is a clean energy carrier which has a great potential to be an alternative fuel. Abundant biomass from various industries could be a source for biohydrogen production where combination of waste treatment and energy production would be an advantage. A study of biohydrogen production using aerobic-pretreated sludge and molasses by anaerobic fermentation in continuous stirred-tank reactor (CSTR)...
Hydrogen production derived from biomass gasification is proved to a competitive method to obtain environmental friendly fuel. This paper presents a model of biomass gasification in ASPEN PLUS process simulator and a detailed methodology of hydrogen production in gasifier was set up. In the period of biomass gasification, the effect on gasification efficiency of different parameters, including gasification...
Hydrogen production by biomass supercritical water gasification is about to develop in the future because the process is closed and clean with high gasification efficiency in addition. Low concentration sodium carboxymethylcellulose (CMC) (2-3% mass fraction) can be mixed with particulate biomass and water to form a uniform and stable viscous paste which can be pumped to the continuous high-pressure...
The catalytic steam gasification of palm oil wastes for hydrogen-rich gas production was experimentally investigated in a combined fixed bed reactor using the newly developed nano-NiO/??-Al2O3 catalyst. The results indicated that the nano-NiO/??-Al2O3 catalyst had greater activity for the cracking of tar in vapor and of hydrocarbons and a higher hydrogen yield than the calcined dolomite in catalytic...
The feasibility of producing hydrogen-riched fuel gas from wet sewage sludge was assessed in this paper, which consist in carrying out the pyrolysis of dewatered residual activated sludge as it is produced in the wastewater treatment plant with a moisture content of above 70%, without subjecting it to any previous thermal drying process. In order to establish the most favorable conditions for the...
Ni/γ-Al2O3-550 and Ni/γ-Al2O3-800 catalysts (calcined at 550°C and 800°C in the catalyst preparation) were prepared with a impregnation method. Steam reforming of acetic acid as a model compound of bio-oil for hydrogen production had been investigated on the catalysts. The fresh catalysts were characterized by X-ray diffraction (XRD), temperature programmed reduction (TPR-H2) and specific surface...
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