Hydrogen production from biogas using hot slag
Hydrogen production from biogas using hot slag
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DOI：
10.1016/j.ijhydene.2005.04.021
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发表时间：
2006-03-01
影响因子：
7.2
通讯作者：
Akiyama, T
中科院分区：
文献类型：
--
作者：
Purwanto, H;Akiyama, T
本文研究了热炉渣沼气制氢的可能性，在固定流量和压力下，测定了炉渣填充床中CO_2-CH_4的分解速率。熔融炉渣是炼钢、城市垃圾焚烧等冶炼工业在1700 K以上高温下排放的熔融炉渣。它具有足够的潜力来替代由于烃的催化蒸汽重整或碳分解而产生的制氢所需的能量。然而，热渣的热回收从未建立。因此，本研究的目的是以炉渣颗粒为催化剂，以甲烷为原料，在973 ~ 1273 K的温度范围内，考察温度对炉渣颗粒催化甲烷制氢的影响。实验中，在常压和恒流条件下，将CH 4和CO2的混合气体连续通入热渣填充床中，然后用气相色谱仪监测出口气体。结果表明，炉渣不仅是热介质，而且是促进分解的良好催化剂。产物气体主要是氢气和一氧化碳，有/没有固体碳沉积在渣表面上，这取决于反应温度。随着温度的升高，出口气体中未反应的甲烷减少，导致大量的氢气产生，此时甲烷的最大转化率约为96%。结果表明，利用熔渣余热替代制氢所需能量，减少二氧化碳排放，是一种节能的制氢新工艺。(c)2005年国际氢能协会。由爱思唯尔有限公司出版。保留所有战斗。
Possibility of hydrogen production from biogas using hot slag has been studied, in which decomposition rate Of CO2-CH4 in a packed bed of granulated slag was measured at constant flow-rate and pressure. The molten slag, discharged at high temperature over 1700 K from smelting industries such as steelmaking or municipal waste incineration. It has enough potential for replacing energy required for hydrogen production due to the catalytic steam reforming or carbon decomposition of hydrocarbon. However, heat recovery of hot slag has never been established. Therefore, the objective of this work is to generate hydrogen from methane using heated slag particles as catalyst, in which the effect of temperature on the hydrogen generation was mainly investigated at range from 973 to 1273 K. In the experiments a mixed gas of CH4 and CO2 was continuously introduced into the packed bed of hot slag at constant flow-rate and atmospheric pressure and then the outlet gas was monitored by gas chromatography. The results indicate that slag acted as not only thermal media but also good catalyst, for promoting decomposition. The product gases were mainly hydrogen and carbon monoxide with/without solid carbon deposition on the surface of slag, depending on the reaction temperature. Increasing temperature led to large hydrogen generation with decreasing un-reacted methane in the outlet gas, at when the largest methane conversion was about 96%. The results suggested a new energy-saving process of hydrogen production, in which the waste heat from molten slag can replace the energy required for hydrogen production, reducing carbon dioxide emission. (c) 2005 International Association for Hydrogen Energy. Published by Elsevier Ltd. All fights reserved.