摘要
木质纤维素高效利用对降低碳排放和化石依赖至关重要,尽管(半)纤维素转化已取得进展,但经济性亟待提高。木质素价值化是实现生物质化工盈利的关键,也是当前技术面临的主要难点。为了高效分离木质纤维素主要成分并将木质素及其衍生物转化为较窄产品流,本研究提出水热-热解和水热-生化耦合新路线,基于木质素优先策略构建了两种杨木分级利用方案,通过Aspen Plus建模并开展评估。研究发现两者的系统碳效率接近但在能量回收方面存在差距。两方案的最低燃料销售价格分别为7456 CNY/t和6990 CNY/t,与国内汽油市场调研价格相当。技术突破以提升理想产品收率是改善系统经济性的关键。此外,降低固定资本投资、控制主要耗材成本有望进一步提高市场竞争力。
Efficient use of lignocellulose is essential for reducing carbon emissions and dependence on fossil fuels.While advances have been made in(hemi)cellulose conversion,improving its economic feasibility remains a pressing need.Valorization of lignin is essential for achieving profitability in biorefineries and remains a major technical challenge.This study proposes innovative cross-coupling routes that integrate hydrothermal-pyrolysis and hydrothermal-biochemical conversion to efficiently separate the primary components of lignocellulose,converting lignin and its derivatives into a relatively narrow product slate.Following the lignin-first strategy,two poplar graded utilization schemes were developed,modeled in Aspen Plus,and evaluated.While both systems demonstrated comparable carbon efficiency,there is a notable difference in their energy recovery.Techno-economic analysis indicates that the minimum fuel selling prices for the two schemes are 7456 CNY/t and 6990 CNY/t,respectively,which are comparable to domestic gasoline market prices.Future technological breakthroughs to effectively enhance ideal product yield are key to improving the economic viability of the system.Additionally,decreasing fixed capital investment by reducing reactor size and/or pressure,as well as controlling major consumable costs is expected to further enhance the product's market competitiveness.
作者
钱潜
骆仲泱
石靖康
王元霖
魏琪
时云妹
QIAN Qian;LUO Zhongyang;SHI Jingkang;WANG Yuanlin;WEI Qi;SHI Yunmei(State Key Laboratory of Clean Energy Utilization,Zhejiang University,Hangzhou 310027,China)
出处
《工程热物理学报》
北大核心
2025年第6期1780-1790,共11页
Journal of Engineering Thermophysics
基金
国家重点研发计划项目(No.2023YFE0111600)。
关键词
木本生物质
分级利用
木质素优先
woody biomass
graded utilization
lignin-first
process simulation
process evaluation
