Please wait a minute...
Waste Disposal & Sustainable Energy
Waste Disposal & Sustainable Energy
    
纤维素/木质素与聚乙烯/聚苯乙烯的共热解-水蒸气催化重整制氢
Kaltume Akubo1, Mohamad Anas Nahil1, Paul T. Williams1
1 School of Chemical and Process Engineering, University of Leeds, Leeds LS2 9JT, UK
Co-pyrolysis–catalytic steam reforming of cellulose/lignin with polyethylene/polystyrene for the production of hydrogen
Kaltume Akubo1, Mohamad Anas Nahil1, Paul T. Williams1
1 School of Chemical and Process Engineering, University of Leeds, Leeds LS2 9JT, UK
 全文: PDF 
摘要： 据报道，生物质生物聚合物（木质素和纤维素）与塑料废料（聚乙烯和聚苯乙烯）的共热解反应，再加上热解气体的下游催化蒸汽重整，可生产富氢合成气。所用催化剂为重量分数为10%的镍负载在MCM-41上。本文研究了温度和蒸汽流速等工艺参数对氢气和合成气生产的影响。与木质素/塑料混合物相比，纤维素/塑料混合物产生更高的氢气产率。然而，将催化水蒸气转化温度从750℃提高到850℃对木质素添加的影响更为显著。例如，在750℃的催化剂温度下，纤维素/聚乙烯的氢产率为50.3 mmol g?1，在850℃的催化剂温度下增加到60.0 mmol g?1。然而，对于木质素/聚乙烯混合物，氢产率从25.0 mmol g?1增加到50.0 mmol g?1，这表示氢产率增加了两倍。与纤维素/塑料混合物相比，木质素/塑料混合物对氢和产率的影响更大，这是由于木质素与聚乙烯和聚苯乙烯的热降解曲线重叠所致。将蒸汽输入催化反应器产生催化蒸汽重整条件，氢气产率显著提高。与纤维素/塑料混合物相比，增加蒸汽输入对过程的影响对于木质素/塑料混合物更大，同样与木质素和塑料的重叠热降解曲线有关。将Ni/MCM-41催化剂与Ni/Al2O3和Ni/Y型沸石负载催化剂进行了比较，结果表明，Ni/Al2O3催化剂具有较高的氢气和合成气产率。
关键词： Biomass;  Plastics;  Catalysis;  Hydrogen;  Cellulose;  Lignin    
Abstract: Co-pyrolysis of biomass biopolymers (lignin and cellulose) with plastic wastes (polyethylene and polystyrene) coupled with downstream catalytic steam reforming of the pyrolysis gases for the production of a hydrogen-rich syngas is reported. The catalyst used was 10 wt.% nickel supported on MCM-41. The influence of the process parameters of temperature and the steam flow rate was examined to optimize hydrogen and syngas production. The cellulose/plastic mixtures produced higher hydrogen yields compared with the lignin/plastic mixtures. However, the impact of raising the catalytic steam reforming temperature from 750 to 850 °C was more marked for lignin addition. For example, the hydrogen yield for cellulose/polyethylene at a catalyst temperature of 750 °C was 50.3 mmol g-1 and increased to 60.0 mmol g-1 at a catalyst temperature of 850 °C. However, for the lignin/polyethylene mixture, the hydrogen yield increased from 25.0 to 50.0 mmol g-1 representing a twofold increase in hydrogen yield. The greater influence on hydrogen and yield for the lignin/plastic mixtures compared to the cellulose/plastic mixtures is suggested to be due to the overlapping thermal degradation profiles of lignin and the polyethylene and polystyrene. The input of steam to the catalyst reactor produced catalytic steam reforming conditions and a marked increase in hydrogen yield. The influence of increased steam input to the process was greater for the lignin/plastic mixtures compared to the cellulose/plastic mixtures, again linked to the overlapping thermal degradation profiles of the lignin and the plastics. A comparison of the Ni/MCM-41 catalyst with Ni/Al2O3 and Ni/Y-zeolite-supported catalysts showed that the Ni/Al2O3 catalyst gave higher yields of hydrogen and syngas.
Key words: Biomass    Plastics    Catalysis    Hydrogen    Cellulose    Lignin
收稿日期: 2020-06-29
通讯作者: Paul T. Williams     E-mail: Paul T. Williams p.t.williams@leeds.ac.uk
服务　　
把本文推荐给朋友
加入引用管理器
E-mail Alert
RSS
作者相关文章　　
Kaltume Akubo
Mohamad Anas Nahil
Paul T. Williams

引用本文:

Kaltume Akubo, Mohamad Anas Nahil, Paul T. Williams. Co-pyrolysis–catalytic steam reforming of cellulose/lignin with polyethylene/polystyrene for the production of hydrogen. Waste Disposal & Sustainable Energy, 10.1007/s42768-020-00047-8.

链接本文:

http://www.zjujournals.com/wdse/CN/10.1007/s42768-020-00047-8    或    http://www.zjujournals.com/wdse/CN/Y2020/V2/I3/177

No related articles found!