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作者 Ctea (Ctea)
標題 [筆記] note Google Search: 氫氣製造 裂解
時間 2015-11-27 Fri. 18:06:59
http://www.sciencedirect.com/science/article/pii/S0304389409000740
Sustainable valorization of plastic wastes for energy with environmental safety via High-Temperature Pyrolysis (HTP) and High-Temperature Steam Gasification (HTSG) [希臘] [瑞典]
Comparison of the results showed that HTSG seems a more suitable process in terms of produced syngas quality (64%, v/v and 13 MJ/Nm3) than HTP because of higher H2 yield and lower tar content.
#高溫裂解 #高溫蒸汽氣化 #氫氣產生
http://www.sciencedirect.com/science/article/pii/S036031990901814X
Pyrolysis–gasification of post-consumer municipal solid plastic waste for hydrogen production [UK]
Post-consumer plastic waste derived from municipal solid waste was investigated using a two-stage, catalytic steam pyrolysis–gasification process for the production of hydrogen. The three important process parameters of catalyst:plastic ratio, gasification temperature and water injection rate were investigated. Temperature-programmed oxidation (TPO) and scanning electron microscopy (SEM) methods were used to analyse the reacted catalysts.
The results showed that there was little influence of catalyst:plastic ratio between the range 0.5 and 2.0 (g/g) on the mass balance and gas composition for the pyrolysis–gasification of waste plastics; this might be due to the effective catalytic activity of the Ni–Mg–Al catalyst.
However, increasing the gasification temperature and the water injection rate resulted in an increase of total gas yield and hydrogen production.
The coke formation on the catalyst was reduced with increasing use of catalyst; however, a maximum coke formation (9.6 wt.%) was obtained at the gasification temperature of 700 ° C when the influence of gasification temperature was investigated.
The maximum coke formation was obtained at the water injection rate of 4.74 g h−1, and a more reactive form of coke seemed to be formed on the catalyst with an increase of the water injection rate, according to the TPO experiments.
#MSW #氫氣 #催化劑減少結炭 #700度 #Ni–Mg–Al #氣化Gasification
http://pubs.acs.org/doi/abs/10.1021/es402488b
Processing Real-World Waste Plastics by Pyrolysis-Reforming for Hydrogen and High-Value Carbon Nanotubes - Environmental Science & Technology (ACS Publications) [UK] [匈牙利] [澳洲]
The results show that hydrogen can be produced from the pyrolysis-reforming process, but also carbon nanotubes are formed on the catalyst. However, the content of 0.3 wt.% polyvinyl chloride in the waste HDPE (HDPE/PVC) has been shown to poison the catalyst and significantly reduce the quantity and purity of CNTs.
The presence of sulfur has shown less influence on the production of CNTs in terms of quantity and CNT morphologies. Around 94.4 mmol H2 g–1 plastic was obtained for the pyrolysis-reforming of HDPE waste in the presence of the Ni–Mn–Al catalyst and steam at a reforming temperature of 800 ° C.
The addition of steam in the process results in an increase of hydrogen production and reduction of carbon yield; in addition, the defects of CNTs, for example, edge dislocations were found to be increased with the introduction of steam (from Raman analysis).
#炭奈米管 #MOC #CNT #氫氣製作
Department of Hydrocarbon and Coal Processing, University of Pannonia, Egyetem u. 10, Hungary
http://www.degruyter.com/view/j/ijcre.2007.5.1/ijcre.2007.5.1.1504/ijcre.2007.5.1.1504.xml
A Comparison of Gasification with Pyrolysis for the Recycling of Plastic Containing Wastes : International Journal of Chemical Reactor Engineering [UK]
Gasification breaks solid wastes into simple molecules (mainly CO & H2) which subsequently can be converted to value added liquid chemicals (namely alcohols) by a catalytic synthesis processes.
#MPW #MSW #氣化Gasification #氫氣
http://pubs.acs.org/doi/abs/10.1021/ef050354h
Production of Hydrogen from Plastics by Pyrolysis and Catalytic Steam Reform - Energy & Fuels (ACS Publications)
Thermal decomposition of the most common plastics such as polyethylene and polypropylene produces a mixture of many different hydrocarbons that can be used as a feedstock for producing hydrogen.
From 60 g/h polypropylene fed to the system 20.5 g/h hydrogen was produced, which corresponds to 80% of the theoretical potential.
#PE PP #蒸氣改造 #氫氣 #微型反應爐 #beam mass spectrometer
http://sciencedomain.org/download/MTExMUBAcGY
[PDF]
Pyrolysis of Household Plastic Wastes
The chemical composition of the liquids obtained and the yields depended on the original polymer, quality of the waste, and the engineering of thermolysis procedure. The refinement of liquids resulting from pyrolysis is necessary to obtain a quality fuel. The condensed liquids produced from pyrolysis contained highly reactive chemicals such as vinyl, alkene, and three- and four-member cyclic hydrocarbons, which make the storage life of these materials short. For long time storage, however, these liquids must be stabilized either by stabilizers or hydrogenation of the product promptly after collection.
#原始單體 #Hydrogeneration
http://www.osti.gov/scitech/biblio/183283
Technical and economic analyses of hydrogen production via indirectly heated gasification and pyrolysis (Conference) | SciTech Connect
#氣化反應 #經濟效益分析 #非直接加熱式 #加油站 refueling station
http://pubs.acs.org/doi/abs/10.1021/ie960396g
Biomass to Hydrogen via Fast Pyrolysis and Catalytic Steam Reforming of the Pyrolysis Oil or Its Fractions - Industrial & Engineering Chemistry Research (ACS Publications)
Pyrolysis of lignocellulosic biomass and reforming of the pyroligneous oils are being studied as a strategy for producing hydrogen. A process of this nature has the potential to be cost competitive with conventional means of producing hydrogen.
We propose a regionalized system of hydrogen production, where small- and medium-sized pyrolysis units (<500 Mg/day) provide bio-oil to a central reforming unit to be catalytically converted to H2 and CO2.
Thermodynamic modeling of the major constituents of the bio-oil has shown that reforming is possible within a wide range of temperatures and steam-to-carbon ratios.
In addition, screening tests aimed at catalytic reforming of model compounds to hydrogen using Ni-based catalysts have achieved essentially complete conversion to H2
#快速裂解 #生物質 #以催化流升級 #木質纖維 #Ni-based catalysts催化劑 #觀察窗
http://www.sciencedirect.com/science/article/pii/S0378382003003151
Fast pyrolysis of biomass in free-fall reactor for hydrogen-rich gas
Under fast heating and pyrolysis conditions as in the free-fall reactor, an interaction of the biomass pyrolysis with the in situ steam reforming of the pyrolysis intermediate products occurs, which leads to more hydrogen-rich gas yield.
The total ratio of CO and H2 in the gas product reaches 65.4 mol% for legume straw and 55.7 mol% for apricot stone, respectively.
#快速裂解 #自由落體型爐體 #直立爐 #legume straw豆梗 #apricot stone 李核 李子
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※ 作者: Ctea 時間: 2015-11-27 18:06:59
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