Production of Hydrogen and Syngas via Steam Gasification of Glycerol in a Fixed-Bed Reactor

2008 ◽  
Vol 49 (1-2) ◽  
pp. 59-67 ◽  
Author(s):  
T. Valliyappan ◽  
D. Ferdous ◽  
N. N. Bakhshi ◽  
A. K. Dalai
Keyword(s):  
Fixed Bed ◽  
Steam Gasification ◽  
Fixed Bed Reactor ◽  
Production Of Hydrogen

Steam Gasification of Biochar Derived from Fast Pyrolysis for Hydrogen-Rich Gas Production

2013 ◽  
Vol 830 ◽  
pp. 477-480 ◽  
Author(s):  
Wei Qing Zeng ◽  
Ling Jun Zhu ◽  
Qi Wang
Keyword(s):  
Carbon Number ◽  
Fast Pyrolysis ◽  
Fixed Bed ◽  
Gas Production ◽  
Steam Gasification ◽  
Fixed Bed Reactor ◽  
Hydrogen Yield ◽  
Low Carbon ◽  
Production Of Hydrogen ◽  
Pyrolysis Of Biomass

Steam gasification of biochar from fast pyrolysis of biomass was conducted in a fixed bed reactor. The experiments were carried out at temperature of 700, 750, 800 °C with steam flow rate of 0.1 g/min and reaction time of 3 h. The gas products mainly included H2, CO, CO2and some hydrocarbons with low carbon number. The results showed that the conversion of biochar at 700, 750, 800 °C was 68, 78, 96 wt%, respectively, and high gasification temperature favored the production of hydrogen-rich gases. The hydrogen yield increased with temperature rising and reached the maximum of 35.70 mol/kg with a hydrogen concentration of 74 V% at 800 °C.

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.

Catalytic steam gasification of pig compost for hydrogen-rich gas production in a fixed bed reactor

2013 ◽  
Vol 133 ◽  
pp. 127-133 ◽  
Author(s):  
Jingbo Wang ◽  
Bo Xiao ◽  
Shiming Liu ◽  
Zhiquan Hu ◽  
Piwen He ◽  
...  
Keyword(s):  
Fixed Bed ◽  
Gas Production ◽  
Steam Gasification ◽  
Fixed Bed Reactor

Steam gasification of selected energy crops in a fixed bed reactor

2010 ◽  
Vol 35 (2) ◽  
pp. 397-404 ◽  
Author(s):  
Adam Smoliński ◽  
Krzysztof Stańczyk ◽  
Natalia Howaniec
Keyword(s):  
Fixed Bed ◽  
Energy Crops ◽  
Steam Gasification ◽  
Fixed Bed Reactor

K2CO3-Catalyzed Steam Gasification of Indonesian Low-Rank Coal for H2-Rich Gas Production in a Fixed Bed Reactor

2015 ◽  
Vol 3 (5) ◽  
pp. 527-534 ◽  
Author(s):  
XiangZhou Yuan ◽  
Hueon Namkung ◽  
Tae-Jin Kang ◽  
Hyung-Taek Kim
Keyword(s):  
Fixed Bed ◽  
Gas Production ◽  
Steam Gasification ◽  
Fixed Bed Reactor ◽  
Low Rank ◽  
Low Rank Coal

Effects of Zn on Steam Gasification Characteristics of Shenhua Lignite Char

2014 ◽  
Vol 1008-1009 ◽  
pp. 252-256
Author(s):  
Wipawan Sangsanga ◽  
Jin Xiao Dou ◽  
Zhe Lei Tong ◽  
Jiang Long Yu
Keyword(s):  
Gas Chromatography ◽  
Catalytic Activity ◽  
Fixed Bed ◽  
Steam Gasification ◽  
Experimental Results ◽  
Fixed Bed Reactor ◽  
Gas Composition ◽  
Gaseous Products ◽  
Lignite Char ◽  
Catalytic Effects

The catalytic effects of Zn on the yield of the gaseous products during steam gasification of lignite char were investigated by using a fixed-bed reactor. The gas composition was measured using a gas chromatography (GC). The experimental results show that Zn has catalytic effects on steam gasification and increased the yield of H2. There was an optimum content of Zn implanted into the coal above which zinc does not show further catalytic activity.

Production of hydrogen-rich gas from waste rigid polyurethane foam via catalytic steam gasification

2020 ◽  
Vol 38 (7) ◽  
pp. 802-811 ◽  
Author(s):  
Xiaoya Guo ◽  
Zijuan Song ◽  
Wei Zhang
Keyword(s):  
Calcium Carbonate ◽  
Polyurethane Foam ◽  
Volume Fraction ◽  
Steam Gasification ◽  
Interactive Effects ◽  
Fixed Bed Reactor ◽  
Rigid Polyurethane Foam ◽  
Production Of Hydrogen ◽  
Catalyst Dosage ◽  
Steam Flowrate

Catalytic steam gasification of waste rigid polyurethane foam, in the fixed-bed reactor, was performed to produce hydrogen-rich gas. The influence of nine kinds of additives on the yield of products (gaseous, solid and liquid product) and the volume fraction of hydrogen was investigated. Among the additives, calcium carbonate, as the catalyst, could effectively enhance the gas yield and the volume fraction of hydrogen. A three-factor three-level completely randomised factorial (3 × 3 × 3) design, with calcium carbonate as the catalyst, was applied to investigate the influence of experimental conditions (temperature, steam flowrate and catalyst dosage) on the volume fraction of gaseous product components. The data were processed with SPSS statistical software. The result showed that the main effects of one variable, the interactive effects between two factors and the interactive effects among three factors all have statistical high significance. The best catalysed process is realised when calcium carbonate is the catalyst, gasification temperature is 1100°C, steam flowrate is 0.7 kg h−1, catalyst dosage is 10 wt% of waste rigid polyurethane foam. Under this condition, the volume fraction of hydrogen reaches up to 79.85%.

SER Process Variable Evaluation for the Production of Hydrogen using Calcined Dolomite

2011 ◽  
Vol 14 (2) ◽  
pp. 121-126
Author(s):  
A. Lopez-Ortiz ◽  
V. Collins-Martinez ◽  
D. P. Harrison
Keyword(s):  
Fixed Bed ◽  
Catalyst Particle ◽  
Process Variable ◽  
Fixed Bed Reactor ◽  
Particle Sizes ◽  
Gas Composition ◽  
Co2 Diffusion ◽  
Production Of Hydrogen ◽  
Kinetic Effects ◽  
Co2 Absorbent

Reaction performance of the sorption enhanced reforming (SER) process for the production of hydrogen was studied using commercial dolomite as inexpensive solid CO2 absorbent. The combined reforming, shift, and CO2 separation reactions were studied using a laboratory-scale fixed-bed reactor as a function of temperature, feed gas composition, dolomite type, and dolomite and catalyst particle sizes. Reactor was loaded with a mixture of calcined dolomite (≈ 23g) and a commercial reforming catalyst (NiO/Al2O3, ≈ 10g). Temperature was varied from 550 to 650°C at 15 atm. Feed gas composition was varied from 6 to 20% CH4/balance N2 and steam, with a feed H2O/CH4 ratio = 4. Two sources of dolomite were used; Rockwell and Stonelite. Particle sizes of dolomite and catalyst were 75>dp>150 μm and 300>dp>425 μm, respectively and were inversely varied. Results show that at 550°C Ca(OH)2 formation is possible, thus reducing the available CaO for carbonation, negatively affecting the performance of the SER system, while 650°C reached the SER thermodynamic equilibrium (TE). The use of dolomite approached the TE of the feed gas compositions studied, disregarding of its source. Kinetic effects observed in the tests suggest that small dolomite and large catalyst particles favor the decrease of CO2 diffusion effects.

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