Low Temperature Catalytic Steam Gasification of Waste Palm Trunk by Pottasium Carbonate Supported on Perovskite Oxide

2012 ◽  
Vol 626 ◽  
pp. 551-558
Author(s):  
Nor Azizi ◽  
Young Kwang Kim ◽  
Jin Miyawaki ◽  
Isao Mochida ◽  
Seong Ho Yoon
Keyword(s):  
Low Temperature ◽  
Atmospheric Pressure ◽  
Raw Materials ◽  
Steam Gasification ◽  
Perovskite Oxide ◽  
Carbon Conversion ◽  
Pyrolysis Reactor ◽  
Pre Treatment ◽  
Short Time ◽  
Gasification Temperature

A waste palm trunk was used as raw materials of derived biochar in catalytic steam gasification experiments. Pre-treatment was done to enrich the carbon content and removed the heavy and light tar. Waste palm trunk has been added in pyrolysis reactor to produce biochar at temperature 550°C under N2 flow. The experimental ran in a bubbling fluidized reactor at atmospheric pressure by the steam as gasification agent and Nitrogen as a carrier gas with different catalysts such as K2CO3 / LaMn0.8Cu0.2, K2CO3 / Alumina, Alumina and K2CO3 respectively. The experiments have been carried out to investigate the effect of gasification temperature, effect of catalyst and effect of catalyst ratio to biochar on the carbon conversion into syngas. The syngas compositions were analyzed by gas chromatography. K2CO3 / LaMn0.8Cu0.2 catalyst showed the better carbon conversion as compared to the other catalysts. Perovskite oxide was more effective as a support for the gasification catalyst. The results showed that the better carbon conversion ratio within short time gasification and removed heavy and light tar. K2CO3 / LaMn0.8Cu0.2 showed high activity for biochar gasification at low temperature and good recovery property near 750°C.

Catalytic Steam Gasification of Waste Palm Tree Trunk Derived Bio-Char

2013 ◽  
Vol 315 ◽  
pp. 252-259
Author(s):  
Nor Azizi ◽  
Young Kwang Kim ◽  
Jin Miyawaki ◽  
Isao Mochida ◽  
Seong Ho Yoon
Keyword(s):  
Catalyst Support ◽  
Steam Gasification ◽  
Perovskite Oxide ◽  
Palm Tree ◽  
Carbon Conversion ◽  
Tree Trunk ◽  
Metal Carbonate ◽  
Carbon Combustion ◽  
Effects Of Temperature ◽  
Short Time

Catalytic steam gasification of Malaysia Waste Palm Tree Trunk Derived Bio-char was studied using alkali metal carbonate (K2CO3) supported perovskite oxide catalysts which showed a favor catalytic activity in the carbon combustion. The bio-char steam gasification reactions were carried out using a fixed reactor under a steam atmosphere with different catalysts, such as K2CO3/LaMn0.8Cu0.2O3, K2CO3/Alumina, Nikel/LaMn0.8Cu0.2O3, Nikel/Alumina, and Alumina, respectively. The effects of temperature, catalyst support and catalysts mixing ratio on the syngas compositions and carbon conversion were carefully investigated. The syngas compositions were analyzed by gas chromatography (GC). K2CO3/LaMn0.8Cu0.2O3catalyst showed better carbon conversion compared to the other catalysts, which indicated the Perovskite Oxide was more effective as a support for the gasification catalyst. The results showed that the better carbon conversion within short time removed nearly 100% of heavy and light tar.

Low-temperature catalytic conversion of lignite: 1. Steam gasification using potassium carbonate supported on perovskite oxide

2014 ◽  
Vol 20 (1) ◽  
pp. 216-221 ◽  
Author(s):  
Young-Kwang Kim ◽  
Joo-Il Park ◽  
Doohwan Jung ◽  
Jin Miyawaki ◽  
Seong-Ho Yoon ◽  
...  
Keyword(s):  
Low Temperature ◽  
Potassium Carbonate ◽  
Catalytic Conversion ◽  
Steam Gasification ◽  
Perovskite Oxide

scholarly journals Examinations of Polish brown and hard coals in terms of their use in the steam gasification process

2017 ◽  
Vol 33 (1) ◽  
pp. 15-34 ◽  
Author(s):  
Stanisław Porada ◽  
Tadeusz Dziok ◽  
Grzegorz Czerski ◽  
Przemysław Grzywacz ◽  
Andrzej Strugała
Keyword(s):  
Reaction Rate ◽  
Raw Materials ◽  
Calorific Value ◽  
Reaction Rate Constant ◽  
Steam Gasification ◽  
Reactivity Index ◽  
Conversion Degree ◽  
Carbon Conversion ◽  
Reaction Rate Constants ◽  
Gaseous Products

Abstract In order to determine the suitability of Polish coals for steam gasification, five Polish hard coals and three brown coals, which are used for power and heat production, were examined in this work. The examinations of the process of steam gasification were conducted with the use of a laboratory plant which allows for measurements within a broad pressure range with the thermovolumetric method. Reactivity evaluations for the examined coals were conducted on the basis of an analysis of the shape of the kinetic curves of formation of major gasification products and a comparison of the curves of the carbon conversion degree of the examined raw materials. In order to evaluate the reactivity of the examined coals, the following factors were utilized: a comparison of the shape of the curves of the carbon conversion degree and the maximal value of the carbon conversion degree, the time of partial conversion τ0.5, the reactivity index R0.5, as well as the reaction rate constant of carbon conversion. The yields, composition and calorific value of the resulting gas were determined as well as the reaction rate constants of formation of particular gaseous products of gasification. Additionally, for the examined coals, ash fusibility and the content of selected impurities, e.g. sulfur, chlorine and mercury, were given.

Steam Gasification of Catalytic Pyrolysis Char for Hydrogen-Rich Gas Production

2013 ◽  
Vol 316-317 ◽  
pp. 105-108
Author(s):  
Wu Xing Sun ◽  
Yan Zhou ◽  
Qi Wang ◽  
Shu Rong Wang
Keyword(s):  
Atmospheric Pressure ◽  
Catalytic Pyrolysis ◽  
Fixed Bed ◽  
Gas Production ◽  
Steam Gasification ◽  
Fixed Bed Reactor ◽  
Bed Temperature ◽  
Production Of Hydrogen ◽  
Pyrolysis Of Biomass ◽  
Gasification Temperature

Steam gasification of biochar from catalytic pyrolysis of biomass was studied in a fixed bed reactor at atmospheric pressure. The experiments were carried out at bed temperature of 700, 750, 800 °C at steam flow rate of 0.1 g/min with reaction time of 3h. The gases produced included mainly H2, CO, CO2 and some small molecular hydrocarbons. The results showed that high gasification temperature was favorable for the production of hydrogen-rich gases. The maximum concentration of hydrogen exceeded 85% at 800 °C and the total gas yield increased with temperature rising. Meanwhile, the conversion efficiency of biochar at 700, 750, 800 °C was 48%, 60%, 72% respectively.

Equilibrium model analysis of waste plastics gasification using CO2 and steam

2017 ◽  
Vol 35 (12) ◽  
pp. 1247-1253
Author(s):  
P Kannan ◽  
G Lakshmanan ◽  
A Al Shoaibi ◽  
C Srinivasakannan
Keyword(s):  
Equilibrium Model ◽  
Thermochemical Treatment ◽  
Evaluation Study ◽  
Steam Gasification ◽  
Carbon Conversion ◽  
Waste Plastics ◽  
Cold Gas Efficiency ◽  
Product Gas ◽  
Gas Efficiency ◽  
Gasification Temperature

Utilization of carbon dioxide (CO2) in thermochemical treatment of waste plastics may significantly help to improve CO2 recycling, thus simultaneously curtailing dioxins/furans and CO2 emissions. Although CO2 is not such an effective gasifying agent as steam, a few investigations have explored the utilization of CO2 in conjunction with steam to achieve somewhat higher carbon conversion. This work presents a comparative evaluation study of CO2 and steam gasification of a typical post-consumer waste plastics mixture using an Aspen Plus equilibrium model. The effect of flow rate of gasifying medium (CO2 and/or steam) and gasification temperature on product gas composition, carbon conversion, and cold gas efficiency has been analyzed. Simulation results demonstrate that CO2 can serve as a potential gasifying agent for waste plastics gasification. The resulting product gas was rich in CO whereas CO2–steam blends yield a wider H2/CO ratio, thus extending the applications of the product gas.

PEMANFAATAN LIMBAH KULIT DURIAN (Durio zibethinus) DAN KULIT CEMPEDAK (Artocarpus integer) SEBAGAI EDIBLE FILM

2014 ◽  
Vol 6 (1) ◽  
pp. 27 ◽  
Author(s):  
Desi Mustika Amaliyah
Keyword(s):  
Tensile Strength ◽  
Food Packaging ◽  
Raw Materials ◽  
Edible Films ◽  
Edible Film ◽  
Durio Zibethinus ◽  
Yield Result ◽  
Pre Treatment

Durian (Durio zibethinus) and cempedak (Artocarpus integer) peels waste are not used by the society. The research aim is to extract pectin from durian and cempedak peels and to formulate the pectin into edible films for food packaging. The research stages were first pre-treatment of durian and cempedak peels, pectin extraction, pectin drying, and  pectin application as edible films with concentration of 0%, 5%, and 15%. Based on this research it was concluded that pectin can be extracted from durian and cempedak peels with yield result of 27.97 % and 55.58 %, respectively. Edible film obtained has  similar characteristics between raw materials cempedak and durian peels. The higher concentration of cempedak peel  pectin increased the thickness, but decreased the tensile strength and elongation at a concentration of 15%. While in edible films from durian peel pectin, the higher concentration of pectin decreased the thickness of edible film on pectin concentration of 15%, lowered tensile strength and raised the edible film elongation.Keywords: waste, durian, cempedak, pectin extraction, edible film

scholarly journals Possibility of Humid Municipal Wastes Hygienisation Using Gliding Arc Plasma Reactor

Water ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 194
Author(s):  
Joanna Pawłat ◽  
Piotr Terebun ◽  
Michał Kwiatkowski ◽  
Katarzyna Wolny-Koładka
Keyword(s):  
Low Temperature ◽  
Plasma Treatment ◽  
Alternative Fuels ◽  
Raw Materials ◽  
Arc Discharge ◽  
Plasma Reactor ◽  
Municipal Waste ◽  
Low Temperature Plasma ◽  
Temperature Plasma ◽  
Gliding Arc

Sterilization of municipal waste for a raw material for the production of refuse-derived fuel and to protect surface and ground waters against biological contamination during transfer and storage creates a lot of problems. This paper evaluates the antimicrobial potential of non-equilibrium plasma in relation to the selected groups of microorganisms found in humid waste. The proposed research is to determine whether mixed municipal waste used for the production of alternative fuels can be sterilized effectively using low-temperature plasma generated in a gliding arc discharge reactor in order to prevent water contamination and health risk for working staff. This work assesses whether plasma treatment of raw materials in several process variants effectively eliminates or reduces the number of selected groups of microorganisms living in mixed municipal waste. The presence of vegetative bacteria and endospores, mold fungi, actinobacteria Escherichia coli, and facultative pathogens, i.e., Staphylococcus spp., Salmonella spp., Shigella spp., Enterococcus faecalis and Clostridium perfringens in the tested material was microbiologically analyzed. It was found that the plasma treatment differently contributes to the elimination of various kinds of microorganisms in the analyzed raw materials. The effectiveness of sterilization depended mainly on the time of raw materials contact with low-temperature plasma. The results are very promising and require further research to optimize the proposed hygienization process.

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