Agricultural greenhouse CO2 utilization in anaerobic-digestion-based biomethane production plants: A techno-economic and environmental assessment and comparison with CO2 geological storage
Agricultural greenhouse CO2 utilization in anaerobic-digestion-based biomethane production plants: A techno-economic and environmental assessment and comparison with CO2 geological storage
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DOI：
10.1016/j.apenergy.2019.03.045
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发表时间：
2019-05-15
期刊：
影响因子：
11.2
通讯作者：
Tassou, S. A.
中科院分区：
文献类型：
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作者：
Oreggioni, G. D.;Luberti, M.;Tassou, S. A.
厌氧消化工厂能够生产电力、热量和燃料。沼气可以通过从CO2中分离CH 4而升级为生物甲烷，以满足电网注入要求。副产品二氧化碳可以地质储存或用作生产有价值商品的原料，在这两种情况下都能对燃料生产产生负面的气候变化影响。CO2利用也可以提高植物的经济效益，作为最终产品的商业化相关的利润的结果，同时允许进一步的减排，在本文中，技术经济评估的CO2的副产品在CO2富集的农业温室番茄生产的使用进行了讨论。研究结果表明，根据操作模式和设计方法，当内部CO2浓度保持在1000 ppm时，使用温室可以回收14-67%的副产品CO2。此外，据估计，相关的热量和电力需求分别为0.097 - 0.138 kWh（th）/kg使用的CO2和0.04-0.05 kW（e）/kg使用的CO2。与番茄生产相关的收入部分被温室资本投资和运营成本所抵消;然而，计算出的净利润在16至19 p/kg的使用CO2之间，导致净利润为1.3-1.6 p/kWh的注入生物甲烷。这些结果表明，CO2利用在技术上是可行的，经济上比CO2储存更方便。虽然地质封存和CO2利用都将允许对气候变化产生负面影响的燃料生产，但人们发现，利用配置的温室气体净排放量节省在很大程度上取决于关于所生产的生物甲烷的燃料替代的假设。
Anaerobic digestion plants enable the production of power, heat and fuel. Biogas can be upgraded to biomethane fulfilling grid injection requirements by separating CH4 from CO2. By- product CO2 could be geologically stored or utilized as a feedstock to produce valuable goods, enabling in both cases negative climate change impact fuel production. CO2 utilization could as well improve plant economics, as a consequence of the profits related to the commercialization of the final products whilst allowing further emission reductions.In this paper, a techno-economic assessment of the use of the CO2 by-product in CO2-enriched agricultural greenhouses for tomato production is discussed. The results of the research show that, depending on the operating mode and the design approach, the use of a greenhouse enables the recovery of 14-67% of the byproduct CO2 when the internal CO2 concentration is kept at 1000 ppm. In addition, it is estimated that the associated heat and power demand ranges from 0.097 to 0.138 kWh(th)/kg of used CO2 and 0.04-0.05 kW(e)/kg of used CO2, respectively. Revenues related to the tomato production are partially offset by the greenhouse capital investment and operating costs; however, a net profit between 16 and 19 p/kg of used CO2 was calculated, leading to a net profit of 1.3-1.6 p/kWh of injected biomethane. These results show that CO2 utilization is technically feasible and economically more convenient than CO2 storage. While both geological storage and CO2 utilization would allow negative climate change impact fuel production, the net greenhouse emission savings for the utilization configuration were found to be strongly dependent on the assumptions regarding fuel substitution for the produced biomethane.