Supercritical water gasification of microalgal biomass for hydrogen production-A review
Supercritical water gasification of microalgal biomass for hydrogen production-A review
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DOI：
10.1016/j.ijhydene.2023.08.081
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发表时间：
2023-08
影响因子：
7.2
通讯作者：
Kieran Heeley;R. Orozco;L. Macaskie;J. Love;B. Al-Duri
中科院分区：
文献类型：
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作者：
Kieran Heeley;R. Orozco;L. Macaskie;J. Love;B. Al-Duri
由于其高生长速率的潜力，微藻被视为有前途的制氢原料，但其高含水量使其不适合传统气化。需要一种替代方法，如超临界水气化，以最大限度地发挥这一潜力。本文综述了微藻及其他相关原料的超临界水气化研究进展。氢气产量的影响，生物质的组成，催化剂，操作条件，和集成的反应器到更大的系统被认为是。高碳水化合物和低蛋白质进料通常对于最大氢产率是优选的。均相碱金属盐和非均相过渡金属是理想的催化剂。这些催化剂的可再循环性、失活和对氢气生产的选择性差等问题仍然存在。高温和低生物质浓度适合于高产量，但需要高能量输入，因此当考虑整个系统能量平衡时可能不是有利的。
Due to their potential for a high growth rate microalgae are seen as promising feedstocks for hydrogen production, but their high-water content makes them unsuitable for traditional gasification. An alternative method, such as supercritical water gasification, is required to maximise this potential. This review assesses the literature involving the supercritical water gasification of microalgae and other relevant feedstocks. The impact on hydrogen yield, of biomass composition, catalysts, operating conditions, and the integration of the reactor into larger systems are considered. A high carbohydrate and low protein feed is usually preferable for maximum hydrogen yield. Homogeneous alkali metal salts and heterogeneous transition metals are desirable as catalysts. Issues such as recyclability, deactivation, and poor selectivity towards hydrogen production of these catalysts remain problematic. High temperatures and low biomass concentrations are suitable for high yields but require high energy inputs, so may not be advantageous when considering a whole system energy balance.