Journal of Analytical and Applied Pyrolysis最新文献_第9页

Investigation of thermal transport mechanism of silicone-modified phenolic matrix nanocomposites with different pyrolysis degrees 不同热解度硅改性酚醛基纳米复合材料的热传输机理研究

IF 5.8 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2024-10-01 DOI: 10.1016/j.jaap.2024.106793

Jie Xiao, Guodong Fang, Xiaoqiang Qin, Bing Wang, Changqing Hong, Songhe Meng

{"title":"Investigation of thermal transport mechanism of silicone-modified phenolic matrix nanocomposites with different pyrolysis degrees","authors":"Jie Xiao, Guodong Fang, Xiaoqiang Qin, Bing Wang, Changqing Hong, Songhe Meng","doi":"10.1016/j.jaap.2024.106793","DOIUrl":"10.1016/j.jaap.2024.106793","url":null,"abstract":"<div><div>Polymeric nanocomposites with low thermal conductivity show promising applications for next-generation thermal protection materials used in re-entry vehicles due to their lightweight, high char yield, and excellent ablation-oxidation resistance. However, the thermal conductivity of polymeric nanocomposites varies with the pyrolysis degree of the polymer matrix in aerodynamic environments, which significantly affects thermal protection and structural applications but is challenging to identify experimentally. Herein, non-equilibrium molecular dynamics simulations combined with experiments were implemented to determine the dependence of thermal conductivities on pyrolysis degree and microstructures for polymeric nanocomposites. We further explore the thermal transport mechanism through various contributions to the morphology. The results show that the thermal conductivity of the polymer matrix can be increased by a factor of 4.44 (from 0.27 W/m/K to 1.47 W/m/K) as the pyrolysis degree increases from 0 to 100%, and the thermal conductivity depends nonlinearly on the pyrolysis degree and temperature. Molecular dynamics simulations found that the side chains of the polymer matrix are rapidly scissored with the increasing pyrolysis degrees, and the structural ordering of the residual solids containing sp<sup>2</sup> hybridization is enhanced, exhibiting graphene-like microtopological features, which reduces phonon scattering and makes thermal transport more efficient. This work provides insight into the linkage between the thermal transport properties and the pyrolysis degree of polymeric nanocomposites, which is valuable for improving the thermal transport performance and modeling ablation response for polymeric nanocomposites.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"183 ","pages":"Article 106793"},"PeriodicalIF":5.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142425790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Insight into evolution characteristics of pyrolysis products of HLH and HL coal with Py-VUVPI-MS and DFT 利用 Py-VUVPI-MS 和 DFT 深入了解 HLH 和 HL 煤热解产物的演变特征

IF 5.8 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2024-10-01 DOI: 10.1016/j.jaap.2024.106829

Zhiwei Shi , Zhi Zhang , Huiyu Han , Xinfu He , Yagang Zhang , Anning Zhou , Lijun Jin , Haoquan Hu

{"title":"Insight into evolution characteristics of pyrolysis products of HLH and HL coal with Py-VUVPI-MS and DFT","authors":"Zhiwei Shi , Zhi Zhang , Huiyu Han , Xinfu He , Yagang Zhang , Anning Zhou , Lijun Jin , Haoquan Hu","doi":"10.1016/j.jaap.2024.106829","DOIUrl":"10.1016/j.jaap.2024.106829","url":null,"abstract":"<div><div>To achieve a comprehensive understanding of the influence of chemical structure on the evolution characteristics of coal pyrolysis products, pyrolysis reaction of two kinds of low rank coal (Huolinhe and Huangling coal) were investigated with pyrolysis-vacuum ultraviolet photoionization mass spectrometry (Py-VUVPI-MS). The soft ionized mass spectral detection can provide evolved information of original pyrolysis product. The chemical structure of coal samples was characterized by solid-state <sup>13</sup>C NMR, indicating HLH coal with more branched chain and longer aliphatic chain structure. The bond dissociation enthalpies (BDE) of β-C<sub>al</sub>-C<sub>al</sub> and β-C<sub>al</sub>-O within model compounds were obtained with density functional theory. The difference of peak temperature with maximum evolution was collected to investigate the effect of the chemical environment on evolution behavior of pyrolysis products. The results reveal that branched and long aliphatic side-chains can reduces BDE of β-C<sub>al</sub>-C<sub>al</sub> and β-C<sub>al</sub>-O, resulting in the lower peak temperature of pyrolysis products derived from HLH coal. Substituent groups (such as alkyl and hydroxyl groups) attached on the aromatic rings can reduce peak temperatures. Moreover, the effects of the different substituted position on the aromatic ring of the methyl group presented on differences of the BDE. An increase in aromatic ring size correlates with a certain degree of reduction in BDE for β-C<sub>al</sub>-C<sub>al</sub>; consequently, peak temperature of pyrolysis products with larger aromatic rings is lower. The pyrolysis behavior of coal were discussed based on the experimental observations and theoretical calculation, which are beneficial to understand the reaction route and mechanism of coal pyrolysis.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"183 ","pages":"Article 106829"},"PeriodicalIF":5.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Adsorption of dibenzofuran by modified biochar derived from microwave gasification: Impact factors and adsorption mechanism 微波气化产生的改性生物炭对二苯并呋喃的吸附：影响因素和吸附机理

IF 5.8 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2024-10-01 DOI: 10.1016/j.jaap.2024.106831

Jiyun Ren , Yong Zhang , Hui Wang , Xiaoming Huang , Xiaoling Jin , Kai Zhang , Ruiyu Li , Kaixuan Yang , Yang Yue , Lei Deng , Defu Che

{"title":"Adsorption of dibenzofuran by modified biochar derived from microwave gasification: Impact factors and adsorption mechanism","authors":"Jiyun Ren , Yong Zhang , Hui Wang , Xiaoming Huang , Xiaoling Jin , Kai Zhang , Ruiyu Li , Kaixuan Yang , Yang Yue , Lei Deng , Defu Che","doi":"10.1016/j.jaap.2024.106831","DOIUrl":"10.1016/j.jaap.2024.106831","url":null,"abstract":"<div><div>Dioxins, emanating from the waste incineration, constitutes an organic pollutant that poses considerable risks to the human health and environment. In this study, the corn straw char (CSC) and oak char (OC) derived from the electric heating or microwave gasification, and the coconut-shell activated carbon (AC) are employed as absorbents for the adsorption of dibenzofuran (DBF, dioxins model compound). Characterization techniques, including BET, X-ray CT, SEM-EDS, FTIR, and XPS, are performed to identify the DBF adsorption mechanism on the biochar. The results show that the biochar prepared by the microwave gasification has a more well-developed pore structure than that of the electric heating gasification. The higher porosity (16.94 %) and lower mineral content (1.75 %) are responsible for the effective adsorption of DBF onto AC. The adsorption capacity of CSC is proportional to the modified concentration of KOH. It is mainly ascribed to the decrement of carboxyl and lactone groups and the enhancement of alkaline functional groups on the biochar surface, which augments the hydrophobicity and π–π electron donor–acceptor (EDA) interaction. Instead, DBF adsorption capacity on the biochar is adversely affected by the HNO<sub>3</sub> modification. For all biochar samples, the corresponding maximum adsorption ratios are AC (87.11 %) > KOH-modified CSC (77.14 %) > unmodified CSC (49.11 %) > unmodified OC (39.70 %) > HNO<sub>3</sub>-modified CSC (36.09 %). The adsorption mechanisms of DBF on the gasified biochar encompass the pore filling, hydrophobicity, and π–π EDA interaction. A desirable adsorption capacity of DBF on the biochar prepared by the microwave gasification is attainable through augmenting the specific surface area while diminishing the oxygen-containing groups of the surface simultaneously.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"183 ","pages":"Article 106831"},"PeriodicalIF":5.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142536050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Catalytic pyrolysis of biodegradable plastic in CO2 atmosphere using MSW incinerator bottom ash for PLA monomer recovery 利用城市生活垃圾焚烧炉底灰在二氧化碳气氛中催化热解生物可降解塑料以回收聚乳酸单体

IF 5.8 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2024-10-01 DOI: 10.1016/j.jaap.2024.106839

Shuting Fu , Doeun Choi , Jechan Lee

{"title":"Catalytic pyrolysis of biodegradable plastic in CO2 atmosphere using MSW incinerator bottom ash for PLA monomer recovery","authors":"Shuting Fu , Doeun Choi , Jechan Lee","doi":"10.1016/j.jaap.2024.106839","DOIUrl":"10.1016/j.jaap.2024.106839","url":null,"abstract":"<div><div>This study proposes a method for recovering value-added monomers from abandoned biodegradable plastics such as used biodegradable straws (UBSs) by utilizing a catalyst made of bottom ash generated from municipal solid waste (MSW) incinerators. The MSW-derived bottom ash (MSW-BA) catalyst primarily comprises alkaline metal oxides such as CaO (58.88 wt%). Thermogravimetric and single-shot pyrolysis analyses show that polylactic acid (PLA) monomers—lactide and lactic acid—are the main products of UBS pyrolysis. We conducted catalytic pyrolysis of UBS at 500 °C under different atmospheres (N<sub>2</sub> and CO<sub>2</sub>), with and without the MSW-BA catalyst. Compared with non-catalytic pyrolysis, the MSW-BA catalyst-based pyrolysis significantly increased the yield of PLA monomers in both N<sub>2</sub> and CO<sub>2</sub> environments. This is because the base sites present on the MSW-BA catalyst promoted the polymeric bond cleavage of PLA. The MSW-BA catalyst in CO<sub>2</sub> achieved the highest recovery yield of PLA monomers (20.84 wt% per feedstock mass basis), which was approximately 17.75 % higher than that during non-catalytic UBS pyrolysis. The base sites present on the MSW-BA catalyst promoted polymeric bond cleavage of PLA, and the base-catalyzed pyrolysis of PLA was enhanced by the more reactive cleavage of the bond linkages in the presence of CO<sub>2</sub>. The proposed approach not only reuses biodegradable plastic waste but also utilizes the MSW treatment byproducts.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"183 ","pages":"Article 106839"},"PeriodicalIF":5.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Catalytic ethanolysis of Xiaojihan subbituminous coal to platform chemicals enhanced by pre-oxidation with ozone 通过臭氧预氧化增强小纪汗亚烟煤催化乙醇分解制备平台化学品的能力

IF 5.8 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2024-10-01 DOI: 10.1016/j.jaap.2024.106782

Qi-Yang Zhu , Yong Gao , Miao-Miao Jia , Xia-Long Li , Guang-Hui Liu , Yan-Jun Li , Yu-Hong Kang , Jin-Jun Bai , Chen Shi , Xian-Yong Wei

{"title":"Catalytic ethanolysis of Xiaojihan subbituminous coal to platform chemicals enhanced by pre-oxidation with ozone","authors":"Qi-Yang Zhu , Yong Gao , Miao-Miao Jia , Xia-Long Li , Guang-Hui Liu , Yan-Jun Li , Yu-Hong Kang , Jin-Jun Bai , Chen Shi , Xian-Yong Wei","doi":"10.1016/j.jaap.2024.106782","DOIUrl":"10.1016/j.jaap.2024.106782","url":null,"abstract":"<div><div>Xiaojihan subbituminous coal (XSBC) was pre-oxidized by ozone to prepare oxidized XSBC (OXSBC). Then, the ethanolysis was conducted on OXSBC at 300 °C under an initial nitrogen pressure (INP) of 1 MPa for 2 h. On this basis, the influences of pre-oxidation conditions on the content of oxygen-containing functional groups and the yield of soluble portion (SP) from the ethanolysis of XSBC and OXSBC were explored. The research results show that the yield of SP from the OXSBC ethanolysis is higher than that from the XSBC ethanolysis, and the highest yield of SP from the OXSBC ethanolysis reaches 24.9 wt% at 50 °C for 3 h, an increase of 80.4 % compared to the yield of SP from the XSBC ethanolysis. Besides, the magnetic nanosphere Co-CuFe<sub>2</sub>O<sub>4</sub> catalyst, prepared by adopting the one-pot hydrothermal method, was applied to the catalytic ethanolysis (CE) of OXSBC3 at 300 °C, 1 MPa INP, and 2 h. The catalyst is noticeably active in the CE of OXSBC3, as it promotes the yields of SP and oxygen-containing organic compounds obtained from the OXSBC3 ethanolysis from 24.9 wt% and 76.25 mg g<sup>−1</sup> to 42.8 wt% and 204.16 mg g<sup>−1</sup>, respectively. The CE of the model compound demonstrates that ethanol is activated by Co-CuFe<sub>2</sub>O<sub>4</sub> to release H<sup>+</sup>, H<sup>-</sup>, and <sup>+</sup>CH<sub>2</sub>CH<sub>3</sub>, which play a crucial role in the conversion of benzyloxybenzene. This study provides a novel approach for acquiring value-added organic chemicals from low-rank coals.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"183 ","pages":"Article 106782"},"PeriodicalIF":5.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142425788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Laboratory-scale simulation study of pyrolysis process in a fixed-bed gasifier for municipal solid waste pellets: Effects of temperature distribution and residence time 城市固体废物颗粒在固定床气化炉中热解过程的实验室规模模拟研究：温度分布和停留时间的影响

IF 5.8 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2024-10-01 DOI: 10.1016/j.jaap.2024.106832

Zichao Hu , Longfei Tang , Peipei Gao , Bin Wang , Chang Zhang , Weitong Pan , Lu Ding , Xueli Chen , Fuchen Wang

{"title":"Laboratory-scale simulation study of pyrolysis process in a fixed-bed gasifier for municipal solid waste pellets: Effects of temperature distribution and residence time","authors":"Zichao Hu , Longfei Tang , Peipei Gao , Bin Wang , Chang Zhang , Weitong Pan , Lu Ding , Xueli Chen , Fuchen Wang","doi":"10.1016/j.jaap.2024.106832","DOIUrl":"10.1016/j.jaap.2024.106832","url":null,"abstract":"<div><div>In this study, stepwise heating pyrolysis was designed to simulate the pyrolysis process of municipal solid waste (MSW) pellet in an updraft fixed bed gasifier at a laboratory scale. Differences in pyrolysis product between fixed bed stepwise heating pyrolysis (FBS, ranging from 300 °C to 800 °C) and continuous heating pyrolysis (FBC, maintained at 800 °C) were revealed. The impact of residence time at various temperature ranges on MSW pyrolysis was also investigated. Results indicated that compared to FBC, the gas yield of FBS decreased by 30.74 %, while its liquid yield increased by 11.96 %. It was primarily due to the lower heating rate reduced the secondary conversion of aliphatic hydrocarbons, oxygenated compounds, and monoaromatic hydrocarbons (MAHs) within liquid products. In addition, the composition of MSW pyrolysis products was changed by adjusting the residence time. Maintaining a uniform residence time of 5 min for MSW pellets at each temperature was considered optimal for gas yield, which was mainly attributed to the enhanced cracking of long-chain aliphatic and polycondensation of MAHs and polycyclic aromatic hydrocarbons (PAHs). Besides, the volatiles (C- and O-containing compounds) of the char were almost completely released. The underlying influence mechanism of residence time on the pyrolysis behavior of MSW was also proposed, which could provide insights for the implementation of MSW gasification.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"183 ","pages":"Article 106832"},"PeriodicalIF":5.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Valorizing lignocellulose into aromatic compounds via oxidative catalytic fractionation and transformation strategy catalyzed by polyoxometalates 通过氧化催化分馏将木质纤维素转化为芳香族化合物，以及在多氧金属酸盐催化下的转化策略

IF 5.8 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2024-09-25 DOI: 10.1016/j.jaap.2024.106786

Mingfei Li , Shumin Wang , Haoyu Deng , Junyou Shi , Dan Zhang , Wenbiao Xu

{"title":"Valorizing lignocellulose into aromatic compounds via oxidative catalytic fractionation and transformation strategy catalyzed by polyoxometalates","authors":"Mingfei Li , Shumin Wang , Haoyu Deng , Junyou Shi , Dan Zhang , Wenbiao Xu","doi":"10.1016/j.jaap.2024.106786","DOIUrl":"10.1016/j.jaap.2024.106786","url":null,"abstract":"<div><div>Utilizing renewable resources as substitutes for fossil resources is a crucial pathway towards achieving sustainability, with biomass conversion being a significant avenue. Catalytic fractionation of lignocellulose represents an effective approach to biomass conversion, wherein lignin is selectively separated from lignocellulose and depolymerized into high-value aromatic monomers within the reaction system. However, existing technologies face challenges such as low product selectivity and difficult separation. Herein, we employ oxidative catalytic fractionation (OCF) using polyoxometalates (POMs) as catalysts and a methanol/water mixture as solvent to directly oxidize and catalyze lignin in pine wood lignocellulose into aromatic compounds under an O<sub>2</sub> atmosphere, while preserving cellulose for subsequent utilization. The process yields up to 22.5 % aromatic monomers, with vanillin and methyl vanillate as the main products (calculated based on Klason lignin). Our approach provides a novel perspective for achieving highly selective oxidative fractionation and depolymerization of lignin, thus contributing to the valorization of lignocellulose.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"183 ","pages":"Article 106786"},"PeriodicalIF":5.8,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142327174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Feasibility and recovery efficiency of in-situ shale oil conversion in fractured reservoirs via steam heating: Based on a coupled thermo-flow-chemical model 通过蒸汽加热在断裂储层中就地转化页岩油的可行性和采收效率：基于热流-化学耦合模型

IF 5.8 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2024-09-25 DOI: 10.1016/j.jaap.2024.106787

Zhaobin Zhang , Zhuoran Xie , Maryelin Josefina Briceño Montilla , Yuxuan Li , Tao Xu , Shouding Li , Xiao Li

{"title":"Feasibility and recovery efficiency of in-situ shale oil conversion in fractured reservoirs via steam heating: Based on a coupled thermo-flow-chemical model","authors":"Zhaobin Zhang , Zhuoran Xie , Maryelin Josefina Briceño Montilla , Yuxuan Li , Tao Xu , Shouding Li , Xiao Li","doi":"10.1016/j.jaap.2024.106787","DOIUrl":"10.1016/j.jaap.2024.106787","url":null,"abstract":"<div><div>Shale oil is a type of liquid hydrocarbon obtained through the pyrolysis of organic matter such as kerogen in oil shale reservoirs. Effective extraction of shale oil can significantly alleviate the pressure on oil supply. Among the various methods proposed for shale oil extraction, in-situ conversion of shale oil through high-temperature steam heating is a promising technique. This study employs a newly developed thermo-flow-chemical numerical simulator to establish a heterogeneous geological model and provides a detailed description of the evolution of different components within the shale oil reservoir during the in-situ conversion process. Additionally, the study thoroughly analyzes the role of high-permeability channels, such as fractures, in fluid transport and heat transfer during this process. In comparison with homogeneous reservoirs, fractures play a controlling role in the transport of steam. After injection, steam forms a preferential transport path between the heating well and the production well through the fractures. Subsequent injected steam will preferentially travel through this path, leading to faster heating of the reservoir. However, the uneven distribution of fractures may result in incomplete pyrolysis of the organic matter within the reservoir. Additionally, we found that the producing pressure and the steam injection rate significantly affect the pyrolysis of kerogen and the production of oil and gas. Both excessively low producing pressure and excessively high steam injection rate are detrimental to shale oil extraction. Based on these findings, this study aims to develop more rational heating strategies for reservoirs with different characteristics.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"183 ","pages":"Article 106787"},"PeriodicalIF":5.8,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142327175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microwave plasma conversion of food waste using carbon foam: Production of heteroatom-doped graphene and combustible gas 利用泡沫碳对食物垃圾进行微波等离子体转化：生产掺杂杂原子的石墨烯和可燃气体

IF 5.8 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2024-09-24 DOI: 10.1016/j.jaap.2024.106785

Zhiyang Liu , Kun Chen , Rui Li, Weining Li, Minghui Gong, Xiaoqi Liu, Wei Xia, Dong Liu

{"title":"Microwave plasma conversion of food waste using carbon foam: Production of heteroatom-doped graphene and combustible gas","authors":"Zhiyang Liu , Kun Chen , Rui Li, Weining Li, Minghui Gong, Xiaoqi Liu, Wei Xia, Dong Liu","doi":"10.1016/j.jaap.2024.106785","DOIUrl":"10.1016/j.jaap.2024.106785","url":null,"abstract":"<div><div>The mass production of food waste (FW) has a terrible impact on the environment, but with proper treatment, FW can be transformed into a new resource. Currently, thermal conversion (especially incineration) has been the most common and efficient means of handling FW, but it also entails negative impacts, such as high carbon emissions and lower added value. In this study, a new high-efficiency thermal conversion process is proposed that uses carbon foams to induce the formation of microwave plasma (MP), which generates very high final temperatures to enable the direct conversion of FW into combustible gases and high-value-added heteroatom-doped microwave plasma graphene (HMPG) in 5–20 s. This work investigated the optimal carbonization temperature of the melamine sponge (carbon foam precursor) and the effect of microwave plasma reaction duration on the distribution of the gas products and the properties of HMPG, and HMPG was characterized in detail by Raman spectroscopy, X-ray diffraction, scanning electron microscope, etc. Ultimately, HMPG was tested in potassium ion battery anodes for evaluation of its energy storage potential, and the results showed that the capacities were able to reach ∼270 mAh g<sup>−1</sup> at 50 mA g<sup>−1</sup> after 60 cycles.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"183 ","pages":"Article 106785"},"PeriodicalIF":5.8,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142327173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation of a finely dispersion nickel-based in-situ pyrolysis catalyst: Influence of lignocellulosic constituents 精细分散镍基原位热解催化剂的制备：木质纤维素成分的影响

IF 5.8 2区化学

Journal of Analytical and Applied Pyrolysis Pub Date : 2024-09-23 DOI: 10.1016/j.jaap.2024.106784

Weidong Ren, Yuewen Shao, Mengjiao Fan, Chao Li, Qingyin Li, Xun Hu

{"title":"Preparation of a finely dispersion nickel-based in-situ pyrolysis catalyst: Influence of lignocellulosic constituents","authors":"Weidong Ren, Yuewen Shao, Mengjiao Fan, Chao Li, Qingyin Li, Xun Hu","doi":"10.1016/j.jaap.2024.106784","DOIUrl":"10.1016/j.jaap.2024.106784","url":null,"abstract":"<div><div>Metal/biochar catalysts could be synthesized via directly subjecting biomass impregnated with metal salts to pyrolysis. The properties of biochar are intricately linked to the inherent composition of the raw material, which in turn could influence the degree of metal dispersion and its catalytic impact. The poplar sawdust and its fractioned proportion was employed for the preparation of Ni-based biochar catalysts. The work mainly focuses on the impact of lignocellulosic material with diverse compositions on the dispersion of nickel particles during the calcination-pyrolysis co-process. Given that cellulose and holocellulose constituted the majority of the material, the matching catalyst support may encourage the migration of nickel species to produce substantial amounts of particles, perhaps as a result of several reactions such as dehydration and aromatization. In contrast, the utilization of sawdust as a support demonstrated a remarkable effect in dispersing nickel particles, nickel particle size and H<sub>2</sub> uptake were 7.0 nm and 19.8 μmol/g, respectively, while also displaying exceptional catalytic activity in the hydrogenation of vanillin, with the maximum conversion and 2-methoxy-4-methylphenol (MMP) yield of 99.7 % and 69.0 %. It has been determined that the presence of lignin in the system has a beneficial impact on the dispersion of nickel and its catalytic activity.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"183 ","pages":"Article 106784"},"PeriodicalIF":5.8,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142319098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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