Article
Engineering, Environmental
Tewodros Kassa Dada, Md Anwarul Islam, Ravinder Kumar, Jason Scott, Elsa Antunes
Summary: This study investigated the catalytic co-pyrolysis of ironbark and waste cooking oil over strontium oxide loaded hierarchical Y-zeolite, revealing optimal conditions for bio-oil and aromatic yield.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Yingshu Liu, Xiaoyong Wu, Xiong Yang, Haiyang Tao, Jinjuan Li, Chuanzhao Zhang, Ralph T. Yang, Ziyi Li
Summary: This study successfully improved the NOx adsorption performance of Cu-ZSM-5 zeolites using a simple and rapid modification method, while reducing the cost of desorption energy. The researchers found that under wet gas stream conditions, the properly-loaded IM sample exhibited significant NO2 desorption characteristics. The study also revealed the advantages of the optimized IM sample in terms of diverse adsorbate states and competitiveness towards water, indicating the potential of the IM method as a sorbent improvement strategy in practical applications.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Chemistry, Physical
Zezhou Chen, Xurui Zhang, Fan Yang, Huanghu Peng, Xu Zhang, Shouxin Zhu, Lei Che
Summary: The study reveals that coke evolution in the catalytic pyrolysis of polyethylene leads to accumulation of coke quantity and structural condensation, resulting in catalyst deactivation and decrease of oil yields but increase of wax yields and heavy oil concentration.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Chemistry, Analytical
Omid Norouzi, Somayeh Taghavi, Precious Arku, Sajedeh Jafarian, Michela Signoretto, Animesh Dutta
Summary: Biomass pyrolysis plays an important role in environmental management by providing fuel and chemicals from renewable resources. Tunable catalysts are needed to cater to the variability in biomass properties, with materials like zeolite, silica, and biomass-derived activated carbon showing promise. This study details the synthesis and application of these catalysts, highlighting key factors influencing their activity and stability, and providing perspectives on potential advancements in catalytic pyrolysis. Future research directions, including the development of composites to overcome challenges posed by conventional catalysts, are indicated based on published results.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2021)
Article
Chemistry, Physical
Son Dong, Houqian Li, Iris K. Bloede, Abdullah J. Al Abdulghani, Edgard A. Lebron-Rodriguez, George W. Huber, Ive Hermans
Summary: The catalytic conversion of model compounds for plastic pyrolysis oil (1-octene, octadiene, octane, and toluene) over ZSM-5 in a fixed-bed reactor was investigated mechanistically. The conversion of 1-octene resulted in the production of benzene, toluene, xylene, coke, and hydrogen through a series of cracking, oligomerization, cyclization, and hydrogen transfer reactions. Octadiene mainly contributed to reactor fouling through thermal coking, while octane and toluene were converted through cracking reactions and disproportionation, dealkylation, and coking reactions, respectively. The use of mesoporous ZSM-5 maintained product selectivity for 70 hours in time-on-stream experiments.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Energy & Fuels
Ruofei Wu, Peng Lv, Jiaofei Wang, Yonghui Bai, Juntao Wei, Xudong Song, Weiguang Su, Guangsuo Yu
Summary: In this study, low-cost zeolite/carbon composites were prepared from coal gasification fine slag (CGFS) and used for catalytic upgrading of pyrolysis vapors of cow manure (CM). The composition and distribution of products were explored, and the relationship between catalysts structure and product selectivity was clarified. The study results can provide reference for the comprehensive utilization of solid waste and the development of low-carbon green industry.
Article
Environmental Sciences
Qilong Ge, Qi Tian, Rui Hou, Sufang Wang
Summary: Considering the adverse effects of heavy metals on agricultural soil, the combination of modified biochar and zeolite appears to be a promising choice for immobilizing heavy metals in soil. This combination can significantly improve soil properties and reduce the bioavailability of heavy metals.
Article
Energy & Fuels
Yue Li, Fang Hua, Hang An, Yi Cheng
Summary: A lab-scale laser pyrolysis platform was established to study the pyrolysis of coal and residual oil, verifying the accuracy and reliability of the platform. The appropriate operating conditions for laser pyrolysis were determined to be a residual oil weight less than 1.0 mg, a laser irradiation time longer than 3.0 s, and a laser irradiation power stronger than 90 W.
Article
Thermodynamics
Xiaoye Wang, Yulong You, Xiangxin Han, Xiumin Jiang
Summary: Catalytic pyrolysis of oil shale with different zeolite catalysts was studied by experiments and DFT calculations, revealing differences in product distribution, coke characteristics and hydrocarbon adsorption. The study shows that optimizing zeolite characteristics and pyrolysis conditions can lead to directional regulation of volatile products and improvement of shale oil quality.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Engineering, Environmental
Donghua Li, Meihua Fu, Tao Pei, Yi Lu, Can Liu, Xu Lin, Defa Hou, Hao Sun, Cuiping Luo, Zhifeng Zheng, Yunwu Zheng
Summary: Using lignocellulose and nitrogen carriers to produce nitrogen-rich bio-oil and nitrogen-doped biochar has attracted research attention for biomass conversion and utilization. This study proposed a new strategy to prepare nitrogen-rich bio-oil and N-doped biochar through ammonia impregnation treatment and catalytic pyrolysis with HZSM-5. The type and concentration of amines were found to influence the product properties and formation mechanism. The amine treatment reduced the activation energy and N content, while increasing the char yield. Different ammonia sources reacted with biomass-derived compounds to form pyridinic- and graphitic-like biochar. Formamide at a concentration of 15% demonstrated the highest yield of nitrogen-containing compounds and pyrrole selectivity via catalytic pyrolysis with HZSM-5.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Analytical
Yongqi Liu, Qiuxiang Yao, Ming Sun, Xiaoxun Ma
Summary: The study demonstrates that catalytic fast pyrolysis using ZSM-5, HY and USY catalysts can enhance the selectivity of aromatic hydrocarbons in the pyrolysis products of CTA, promoting the decomposition of organic oxygen compounds and generating light aromatic hydrocarbons. The best results were achieved with a CTA-to-catalyst mass ratio of 1:1.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2021)
Article
Environmental Sciences
Xianyao Ma, Yingxue Li, Defu Xu, Hanxin Tian, Hong Yang
Summary: This study synthesized a carbon/zeolite composite modified by iron (M-C/ZC) and tested its adsorption capacity for NH4+ and PO43- in wastewater. The results showed that M-C/ZC has a high adsorption capacity and removal efficiency for both NH4+ and PO43-.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Tewodros Kassa Dada, Md Anwarul Islam, Arun K. Vuppaladadiyam, Elsa Antunes
Summary: This study aims to synthesize hierarchical strontium loaded Y-zeolite and investigate its application in the co-pyrolysis of ironbark and plastic waste. The modified catalyst showed an increase in external surface area and total aromatic percentage, along with a decrease in acidic groups in the co-pyrolysis oil after sequential dealumination-desilication treatments.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Energy & Fuels
Zhichen Zhang, Bin Lou, Ning Zhao, Enqiang Yu, Zenghao Wang, Hui Du, Zhaojun Chen, Dong Liu
Summary: The study focused on the production of needle coke using low temperature coal tar (LCT) and heavy oil (HO) through liquid phase carbonization. It found that LCT played a key role in improving material compatibility and reducing structural separation during co-carbonization.
Article
Engineering, Chemical
Marin Ugrina, Martin Gabersek, Aleksandra Dakovic, Ivona Nuic
Summary: Sulfur-impregnated zeolite was successfully obtained by chemical modification of natural zeolite clinoptilolite with Na2S, which enhanced the sorption of Hg(II) from aqueous solutions. The impregnation increased basicity and negative surface charge, decreased specific surface area and crystallinity, and showed optimal sorption capacity under acidic conditions.