gasification Articles
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Production of hydrogen by steam gasification of dehydrochlorinated poly(vinyl chloride) or activated carbon in the presence of various alkali compounds
Steam gasification of dehydrochlorinated poly(vinyl chloride) (PVC) or activated carbon was carried out in the presence of various alkali compounds at 3.0?MPa and 560°C–660°C in a batch reactor or in a semi-batch reactor with a flow of nitrogen and steam. Hydrogen and sodium carbonate were the main products, and methane and carbon dioxide were the minor products. Yields of hydrogen were high in ...
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Supercritical water gasification of ethanol fermentation residue of seaweed: effect of sodium chloride salt
The effects of sodium chloride salt on the supercritical water gasification of ethanol fermentation residue of seaweed with and without the presence of catalyst (activated carbon) were investigated. The presence of activated carbon did not affect the carbon gasification efficiency. By increasing the salt concentration, the carbon gasification efficiency is reduced until one point, the carbon ...
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Co-gasification of wood and polyethylene with the aim of CO and H2 production
This article describes the gasification of polyethylene–wood mixtures to form syngas (H2 and CO) with the aim of feedstock recycling via direct fermentation of syngas to ethanol. The aim was to determine the effects of four process parameters on process properties that give insight into the efficiency of gasification in general, and particularly into the optimum gasification conditions for the ...
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Modification of dolomite for hydrogen production via catalytic gasification of residue derived from biomass hydrolysis
Calcined dolomite is a good catalyst in terms of its activity for gasification of residue derived from biomass hydrolysis for hydrogen production, whereas its fragility can cause trouble during operation. A novel modification method aimed at improving the strength of the calcined dolomite has been presented using magnesium nitrate as the modifier, which was introduced into the dolomite via a ...
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Biomass gasification with pure steam in fluidised bed: 12 variables that affect the effectiveness of the biomass gasifier
Biomass gasification in fluidised bed with pure steam has already generated a 60 vol.%, dry basis, H2 rich gas that was increased to 70–80 vol.% H2 by using a CO2 sorbent in the gasifier bed. A tar content as low as 0.25 g/Nm³ has also been reported when an active catalyst is used in the gasifier bed. Biomass gasification in fluidised bed with pure steam, therefore, has some potential ...
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Energetic and exergetic performance assessment of some coals in Turkey for gasification process
This paper undertakes a study on energetic and exergetic performance evaluation of various types of coals in Turkey, such as Armutcuk, Amasra, Zonguldak and Catalagzy hard coals and Tuncbilek, Beypazari, Cayirhan, Afsin, Soma, Yatagan, Can and Sorgun lignites for gasification purposes, where syn-gas may subsequently be used for the production of electricity, heat, hydrogen, etc. in industry. The ...
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Thermal treatment of fleshing residue for producing syngas
In this paper, characteristics of syngas from the pyrolysis and gasification of tannery industry fleshing residues has been investigated. Pyrolysis and gasification behaviour were evaluated in terms of syngas composition and total energy production. Dried air and pure oxygen (99%) were used as gasification agents. Experiments were also erformed in oxygen–free media. H2, CO and CH4 levels in ...
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The use of wire mesh reactors to characterise solid fuels and provide improved understanding of larger scale thermochemical processes
Most reaction products from the pyrolysis and the early stages of gasification of solid fuels are chemically reactive. Secondary reactions between primary products and with heated fuel particles tend to affect the final product distributions. The extents and pathways of these secondary reactions are determined mostly by the heating rate and the size and shape of the reaction zone and of the ...
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Efficiency analysis of hydrogen production methods from biomass
Hydrogen is considered as a universal energy carrier for the future, and biomass has the potential to become a sustainable source of hydrogen. This article presents an efficiency analysis of hydrogen production processes from a variety of biomass feedstocks by a thermochemical method – gasification as well as biochemical methods – fermentation and anaerobic digestion. The exergetic ...
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Comparison of phosphorus recovery from incineration and gasification sewage sludge ash
Incineration of sewage sludge is a common practice in many western countries. Gasification is an attractive option because of its high energy efficiency and flexibility in the usage of the produced gas. However, they both unavoidably produce sewage sludge ashes, a material that is rich in phosphorus, but which is commonly landfilled or used in construction materials. With current uncertainty ...
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Biomass gasification power plant in Bulgaria
ZeroPoint deployed the first of its kind biomass gasification power plant in Bulgaria. The project developer was Bara Group Ltd., a fully owned subsidiary of CEZ, a. s. – one the largest utility companies in Central and Eastern Europe. The project was a 4.5 MWe Combined Heat and Power plant using the ZeroPoint gasification technology and woodchips as a primary source. In 2014 Bara ...
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History of Pyrolysis
Description of Balboa Pacific Corporation’s Technology: Pyrolytic Gasification is by no means new. The principals were first brought forth in 1958 at Bell Laboratories within the United States of America. Thereafter, a number of universities and organizations around the world started R&D programs. The word Pyrolysis meaning, chemical change brought about by heat is widely used, even by ...
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Thermophysical characteristics of the biomass tar from a crop stalk gasification system
Presently, the biomass gasification and centralised gas-supply system fed by crop stalks is still at the stage of development and research in China. The purifier of the system has some problems such as huge device, low purifying efficiency, and poor disposal of tar causing secondary pollution. For this reason, the distillate range, calorific value, ignition temperature, flash point and viscosity ...
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Chemical kinetics parameters of nuclear graphite gasification
This paper provides chemical kinetics parameters for the gasification of nuclear graphite grades of IG–110, IG–430, NBG–18 and NBG–25 and presents empirical correlations for their surface areas of free active sites as a function of mass. The kinetics parameters for the four elementary chemical reactions of gasification of these grades of nuclear graphite include the values ...
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Thermodynamic analysis of an integrated gasification combined cycle power plant: effect of nitrogen supply on system performance
A comprehensive thermodynamic analysis of a conceptual integrated coal gasification combined cycle power plant is presented. Energy and exergy efficiencies and exergy destructions of each sub–unit are calculated. The effect of nitrogen, which is supplied from the Air Separation Unit (ASU) of the gasification unit to the combustion chamber of the gas turbine (GT) cycle, on system performance is ...
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The techno-economic assessment of biomass pyrolysis gasification system for central gas supply: a case study of Jinzhou
The techno-economic assessment of biomass pyrolysis gasification system for central gas supply was conducted using cost and profit method. From the results, it can be seen that Net Present Value (at discount rate of 10%), profit/Cost, and Internal Return Rate of financial analysis in village level under the subsidy of government were 5.61 ? 104 Yuan, 1.09 and 13%, respectively. And Net Present ...
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Feasibility analysis for biomass in cities, counties and facilities
The commercial waste industry includes all those who collect waste from the simplest “collect waste and transport to a landfill” to the more complex “collect waste and process into re-usable components and energy.” This article will cover how we can collect material and fuel a clean energy system for our immediate future, while saving clean water and air. Why Use Biomass? ...
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Measuring Gases Produced by Waste Gasification to Improve Control and Efficiency
Waste gasification is a type of waste to energy process where waste material is used as a fuel to create heat, electricity or other chemical products. Specifically, in waste gasification, the waste material is decomposed in such a way to produce gaseous products, often known as syngas, a combination of hydrogen, carbon monoxide and some carbon dioxide.Conventional incineration uses heat and ...
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Flexible Biomass Gasification Technology for Distributed Power Generation
The ultimate aim of this research and development project is to demonstrate the key technological aspects of the proposed biomass gasification technology for distributed power generation, in order to speed up the commercial update of biomass as a reliable and cheap renewable energy source across Partner countries. Australia will lead this project with the collaboration of Japan, China, India, and ...
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Exergetic performance assessment of gasification and pyrolysis processes of pre-treated wood board wastes
This paper investigates exergetic performance of gasification and pyrolysis processes and compares their exergy efficiencies, using the experimental data on a two-step process of thermo-chemical conversion of Wood Board (WB) wastes. The exergy values of biomass samples change from 17.49 MJ/kg to 24.57 MJ/kg, respectively. Hydrogen produced from pyrolysis step of gasification varies between 17 ...
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