Techno-economic analysis of a solar-powered biomass electrolysis pathway for coproduction of hydrogen and value-added chemicals,Sustainable Energy & Fuels

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Techno-economic analysis of a solar-powered biomass electrolysis pathway for coproduction of hydrogen and value-added chemicals
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2020-09-16 , DOI: 10.1039/d0se01149e
M. A. Khan _{1,

2,

3,

4} , Tareq A. Al-Attas _{1,

2,

3,

4} , Nael G. Yasri _{1,

2,

3,

4} , Heng Zhao _{1,

2,

3,

4} , Stephen Larter _{2,

3,

4,

5} , Jinguang Hu _{1,

2,

3,

4} , Md Golam Kibria _{1,

2,

3,

4}

Affiliation

Electrochemical oxidation of biomass to fuels and value-added chemicals represents an emerging strategy for storing renewable energy and achieving a higher grade of sustainability in chemical industries. While research is still in its infancy, it is important to analyse the economic feasibility of such a process. In this study, we present a detailed techno-economic analysis (TEA) of a potential photo-biorefinery approach for sunlight-driven electro-oxidation of glucose to produce valuable fuels and chemicals i.e., H₂, gluconic acid (GNA) and glucaric acid (GRA). Under a base case scenario, the results are promising with a minimum selling price (MSP) of GRA at $6.94 per kg, which will be ∼70% lower than the current market price. The detailed breakdown and sensitivity analysis suggest that unlike conventional water electrolysis, the cost of raw materials and separation has a significant impact on the economics. Furthermore, we also establish performance targets for conversion (90%), selectivity (90%), feed concentration (0.5 M) and operating current density (0.4 A cm⁻²) such that if these targets are achieved, photo-electrochemical conversion of biomass to fuels and chemicals can become a very profitable option with a MSP of GRA as low as $1.42 per kg.

中文翻译：

联合生产氢和增值化学品的太阳能生物质电解途径的技术经济分析

将生物质电化学氧化为燃料和增值化学品代表了一种新兴战略，该战略用于存储可再生能源并实现化学工业更高水平的可持续性。尽管研究仍处于起步阶段，但重要的是分析这种过程的经济可行性。在这项研究中，我们提出了葡萄糖的太阳光驱动的电氧化，产生有价值的燃料和化学品潜在的光电生物炼制方法的详细技术经济分析（TEA），即，H ₂，葡萄糖酸（GNA）和葡糖二酸（GRA）。在基本情况下，GRA的最低销售价格（MSP）为每公斤6.94美元，比当前市场价格低约70％，结果令人鼓舞。详细的分解和灵敏度分析表明，与常规的水电解不同，原材料和分离的成本对经济性有重大影响。此外，我们还确定了转化率（90％），选择性（90％），进料浓度（0.5 M）和工作电流密度（0.4 A cm ^-2）的性能目标，从而如果实现这些目标，则可以进行光电化学转化GRA的MSP低至每公斤$ 1.42，生物质能成为燃料和化学品的一项非常有利可图的选择。

更新日期：2020-10-08

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