Abstract Biogas is a valuable source of renewable energy produced from biodegradable organic materials via anaerobic digestion. The production of H2 by sorption enhanced steam reforming (SESR) of biogas has been studied thermodynamic and experimentally. A Pd/Ni–Co catalyst and dolomite as CO2 sorbent were used. The effect of biogas composition (CH4/CO2 vol%) on the process was evaluated at 600 and 650 °C in a fluidized bed reactor using biogas CO2 concentrations of 5–50 vol%. During conventional biogas steam reforming (SR), high CH4 partial pressures in the feed favor the process, producing high H2 concentrations. During biogas SESR, CO2 was effectively removed from the gas phase by the sorbent for all the biogas compositions, and it did not alter the process compared to pure methane. Steam methane reforming (SMR) and water-gas shift (WGS), together with carbonation, were the main reactions occurring during biogas SESR. Dry (or CO2) methane reforming did not occur under the conditions studied due to the relatively low temperature and the presence of steam. High H2 purity (98.4 vol%) and H2 yield (91%) were experimentally obtained, pointing out the biogas SESR as a promising technology for the efficient production of high-purity high-yield hydrogen from a renewable source.

中文翻译：

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沼气成分对吸附增强蒸汽重整 (SESR) 制氢的影响

摘要 沼气是一种宝贵的可再生能源，由可生物降解的有机材料通过厌氧消化产生。已经通过热力学和实验研究了通过沼气的吸附增强蒸汽重整 (SESR) 生产 H2。使用 Pd/Ni-Co 催化剂和白云石作为 CO2 吸附剂。在 600 和 650 °C 下，在流化床反应器中使用 5–50 vol% 的沼气 CO2 浓度评估沼气成分（CH4/CO2 vol%）对工艺的影响。在传统的沼气蒸汽重整 (SR) 过程中，进料中的高 CH4 分压有利于该过程，产生高浓度的 H2。在沼气 SESR 期间，所有沼气成分的吸附剂都有效地从气相中去除了 CO2，与纯甲烷相比，它没有改变过程。蒸汽甲烷重整 (SMR) 和水煤气变换 (WGS)，与碳酸化一起，是沼气 SESR 期间发生的主要反应。由于相对较低的温度和蒸汽的存在，在所研究的条件下没有发生干（或 CO2）甲烷重整。通过实验获得了高 H2 纯度 (98.4 vol%) 和 H2 产率 (91%)，指出沼气 SESR 是一种有前途的技术，可从可再生资源中有效生产高纯度高产氢气。