摘要
生物质热利用过程中产生的焦油极易造成管路腐蚀堵塞,是当前亟待解决的关键问题。焦油的催化重整制氢是一种有效的生物质高值化利用技术。以常压气化炉运行过程中产生的焦油为研究对象,利用杏壳制备催化剂炭载体,并负载催化金属以制备重整焦油用碳基催化剂;使用制备的碳基催化剂开展焦油水蒸气催化重整实验,并对比了不同负载金属的催化效果。结果表明:当采用单金属催化剂对焦油进行催化重整时,最佳工况为800℃、通入水蒸气与焦油质量比为3、焦油与催化剂质量比为2时,氢气产量高达91.52 g H_(2)(每1 kg焦油),焦油转化率为93.30%。Ni-Co/C复合催化剂表现出比单金属催化剂更强的活性。
Introduction Biomass as a near-zero emission and novel energy source is regarded as an optimal alternative to fossil fuels.Biomass gasification technology is extensively used due to its superior efficiency in energy utilization,environmental congeniality,and sustainability.However,tar as a predominant by-product of this process presents some formidable challenges,i.e.,combustion difficulties,potential clogging of boiler flue gas ducts,damage to gas-operating machinery,and health risks.These issues constitute a significant impediment to the industrial deployment of biomass gasification technology.Addressing the efficient processing of tar is pivotal for the extensive utilization of biomass gasification.The strategy of employing catalysts for the catalytic reforming of tar to produce hydrogen is emerging as an effective solution,characterized by lower requisite temperatures and enhanced conversion rates.Biomass-derived carbon with its cost-effectiveness,high specific surface area,and outstanding thermal stability is projected to have a significant potential in the transformation of biomass tar.Nevertheless,the suboptimal metal loading capability in the catalyst preparation from biomass carbon results in a reduced catalytic activity and an inferior hydrogen selectivity during the reforming process.Furthermore,there is a notable deficiency in research pertaining to the tar produced in actual production processes.Consequently,there is an urgent need for comprehensive investigations into the mechanism of hydrogen generation via catalytic reforming using biomass-based carbon catalysts.Methods An apricot shell powder with a granularity of 100-150 mesh was utilized as a feedstock for char production.A biomass char carrier was obtained via carbonizing this material at 350℃for 30 min.Subsequently,the biomass char carrier was impregnated and stirred in a 1 mol/L KOH solution for 3 h,followed by a filtration process,with an impregnation ratio of 1 g of char carrier to 10 m L of KOH solution.The impregnated material was firs
作者
白彦渊
王云刚
修浩然
邹立
张兴邦
刘涛
李飞翔
赵钦新
BAI Yanyuan;WANG Yungang;XIU Haoran;ZOU Li;ZHANG Xingbang;LIU Tao;LI Feixiang;ZHAO Qinxin(Key Laboratory of Thermo-Fluid Science and Engineering(Ministry of Education),Xi'an Jiaotong University,Shannxi Xi'an 710049,China;Hubei Special Equipment Inspection and Testing Institute,Hubei Wuhan 430077,China)
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2024年第5期1643-1655,共13页
Journal of The Chinese Ceramic Society
基金
陕西省重点研发计划项目(2018ZDXM-SF-SF-033)
王宽诚教育基金会、湖北省市场监管局技术保障专项(Hbscjg-JS2022004)。
关键词
生物质
焦油
活性炭
催化剂
氢
biomass
tar
activated carbon
catalysts
hydrogen
