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首页> 外文期刊>Energy Conversion & Management >Thermodynamic analysis of polygeneration systems based on catalytic hydropyrolysis for the production of bio-oil and fuels
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Thermodynamic analysis of polygeneration systems based on catalytic hydropyrolysis for the production of bio-oil and fuels

机译：基于催化加氢热解生产生物油和燃料的多联产系统的热力学分析

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Novel polygeneration concepts based on catalytic hydropyrolysis and hydrodeoxygenation are presented and compared via process simulation and thermodynamic analysis. These systems process and convert biomass into high-quality bio-oil and fuels such as synthetic natural gas (SNG), molecular hydrogen (H-2) and methanol (MeOH). Twelve system layouts were evaluated and compared with regards to their energy demands and performances. Detailed thermodynamic models were developed, considering the different technological alternatives for the valorisation of bio-char, removal of carbon dioxide, fuel upgrading and water electrolysis, as well as the opportunities for energy integration. The results show that the standard system, which produces only bio-oil, reaches an energy efficiency of 61% (LHV). This value can be increased by 7-28%-points when co-producing SNG, 10-21%-points when producing H-2, and 10-19%-points when producing MeoH. The highest values are achieved by co-production of SNG as light hydrocarbons are produced in the hydropyrolysis, and limited processing is therefore required to reach the desired product quality. High system efficiencies are possible mainly because of the high efficiency of the core hydropyrolysis process. Carbon conversion efficiencies are highest when generating SNG or MeOH and reach a maximum when electrolysis and char gasification are implemented (98% and 95%). The performance of these polygeneration systems is strongly impacted by the type of CO2 separation process and electrolyser - these processes have a strong influence on the power and heating demands, as well as on the potential energy savings and waste heat valorisation.
机译：提出了基于催化加氢热解和加氢脱氧的新型多联产概念，并通过过程模拟和热力学分析进行了比较。这些系统处理生物质并将其转化为高质量的生物油和燃料，例如合成天然气（SNG），分子氢（H-2）和甲醇（MeOH）。评估并比较了十二种系统布局的能源需求和性能。开发了详细的热力学模型，其中考虑了生物炭增值，去除二氧化碳，燃料升级和水电解以及能源整合机会的不同技术替代方案。结果表明，仅产生生物油的标准系统可达到61％（LHV）的能源效率。当共同生产SNG时，此值可以增加7-28％点，当生产H-2时可以增加10-21％点，而当生产MeoH时可以增加10-19％点。通过在热解过程中生产轻质烃，可以通过联产SNG来获得最高价值，因此需要有限的加工才能达到所需的产品质量。高系统效率是可能的，这主要是由于核心加氢热解过程的高效率。当生成SNG或MeOH时，碳转化效率最高，而在实施电解和炭化时达到最高（98％和95％）。这些多联产系统的性能会受到CO2分离工艺和电解槽类型的强烈影响-这些工艺对功率和加热需求以及潜在的节能和废热平衡有很大的影响。

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