Performance of alkali and Ni-modified ZSM-5 during catalytic pyrolysis of extracted hemicellulose from rice straw for the production of aromatic hydrocarbons
Performance of alkali and Ni-modified ZSM-5 during catalytic pyrolysis of extracted hemicellulose from rice straw for the production of aromatic hydrocarbons
复制标题
碱和镍改性ZSM-5催化热解稻草半纤维素生产芳烃的性能
DOI：
10.1016/j.renene.2021.05.005
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发表时间：
2021-09
期刊：
影响因子：
8.7
通讯作者：
Liu Ronghou
中科院分区：
文献类型：
--
作者：
Nishu;Li Chong;Chai Meiyun;Rahman Md Maksudur;Li Yingkai;Sarker Manobendro;Liu Ronghou
以稻草为原料提取半纤维素，分别采用碱处理法和浸渍法对催化剂ZSM-5进行碱改性和镍改性。为了研究改性ZSM-5对芳烃选择性的影响，采用Py-GC/MS研究了半纤维素的催化裂解反应。所有改性催化剂均表现出比母体ZSM-5（P-ZSM-5）更好的芳烃选择性。值得注意的是，具有0.4M浓度的NaOH的碱改性的ZSM-5（0.4M ZSM-5）显示出36%的对芳族化合物的选择性，与其它相比，苯、甲苯和二甲苯的份额（58%）和多芳族化合物的份额（15%）。同时，8 wt%的Ni-ZSM-5显示出最高的芳烃选择性为54%，其中苯、甲苯和二甲苯的份额为70%。该研究表明，金属改性的ZSM-5显着影响芳烃产率，这是生产液体燃料和化学品所必需的。
Hemicellulose was extracted from rice straw, and catalyst ZSM-5 was modified by NaOH and Ni over alkaline treatment and wet impregnation method, respectively. To investigate the effects of modified ZSM-5 on selectivity of aromatic hydrocarbons, catalytic pyrolysis of hemicellulose was studied via Py-GC/MS. Significant effect has been reported for product selectivity and composition over the modified catalysts. All the modified catalysts showed better aromatic selectivity than parent ZSM-5 (P-ZSM-5). Notably, alkali modified ZSM-5 with 0.4 M concentration of NaOH (0.4 M ZSM-5) showed 36% selectivity towards aromatics with the share of benzene, toluene, and xylene (58%) and share of polyaromatics (15%) compared to others. Meanwhile, 8 wt% Ni-ZSM-5 showed the highest selectivity of aromatic hydrocarbons of 54% where the share of benzene, toluene, and xylene was 70%. This research revealed that metal modified ZSM-5 significantly influences the aromatics yield, which is essential for the production of liquid fuels and chemicals.
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