BIOMASS & BIOENERGY
·
2021
·
IF 5.061
Chenlong Liu,Plaifa Hongmanorom,Jangam Ashok,Dong Chen,Qiao Wu,Wenju Wang,Zhigang Wang
Conversion of biomass tar to useful hydrogen-rich syngas will solve environmental issues related to tar emission as well as increase the overall efficiency of biomass conversion . There are various catalysts to achieve that. In this study, La 1-x Ce x Ni 0.8 Fe 0 . 2 O 3 (0 ≤ x ≤ 1) is selected, and acetic acid has been used as a biomass tar model. Fixed-bed reactor was used for this investigation, while the catalyst characterization has been done mainly by X-ray Adsorption spectroscopy (XAS), X-ray diffraction (XRD), CO 2 -temperature programmed desorption (TPD). The results showed that La 0 . 8 Ce 0 . 2 Ni 0 . 8 Fe 0 . 2 O 3 has the highest acetic acid conversion (68.7%) and hydrogen yield (63.6%). Which is attributed to its more catalytic defect, stable structure and stronger basicity . Furthermore, to express more comprehensively on tar models, La 0 . 8 Ce 0 . 2 Ni 0 . 8 Fe 0 . 2 O 3 were investigated with blends of acetic acid and acetone with different mole ratios (1:0, 4:1, 3:2, 2:3, 1:4 and 0:1) in temperature ranges (500 °C–900 °C), and weight hourly space velocity (WHSV = 12.02 h −1 -15.63 h −1 ). The highest carbon conversion (85.7%) and hydrogen yield (88.5%) were obtained at 600 °C, mole ratio = 4:1, and WHSV = 14.43 h −1 . It is noted that the result of the blend was better; however, based on in situ diffuse reflectance infrared fourier transform spectroscopy ( in-situ DRIFTS) investigation, the enhancement ascribed to inhibition of ketonization reaction was occurred with pure acetic acid. In addition, high reaction temperature and weight hourly space velocity decrease the catalytic activity by accelerating sub-reaction and graphitization coke deposition. In a word, La 0 . 8 Ce 0 . 2 Ni 0 . 8 Fe 0 . 2 O 3 catalyst shows good performance with hydrogen yield over 70% during 1440 min at optimum conditions.
研究领域:
能源科学
·
催化化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Mi Yan,Hongcai Su,Dwi Hantoko,Ekkachai Kanchanatip,Fauziah Binti Shahul Hamid,Sicheng Zhang,Guobin Wang,Zhang Xu
In this study, the model food waste was gasified to hydrogen-rich syngas in a batch reactor under supercritical water condition. The model food consisted of rice, chicken, cabbage, and cooking oil. The effects of the main operating parameters including temperature (420–500 °C), residence time (20–60 min) and feedstock concentration (2–10 wt%) were investigated. Under the optimal condition at 500 °C, 2 wt% feedstock and 60 min residence time, the highest H 2 yield of 13.34 mol/kg and total gas yield of 28.27 mol/kg were obtained from non-catalytic experiments. In addition, four commercial catalysts namely FeCl 3 , K 2 CO 3 , activated carbon, and KOH were employed to investigate the catalytic effect of additives at the optimal condition. The results showed that the highest hydrogen yield of 20.37 mol/kg with H 2 selectivity of 113.19%, and the total gas yield of 38.36 mol/kg were achieved with 5 wt% KOH addition Moreover, the low heating value of gas products from catalytic experiments with KOH increased by 32.21% compared to the non-catalytic experiment. The catalytic performance of the catalysts can be ranked in descending order as KOH > activated carbon > FeCl 3 > K 2 CO 3 . The supercritical water gasification (SCWG) with KOH addition can be a potential applied technology for food waste treatment with production of hydrogen-rich gases.
研究领域:
能源转化
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Liangfei Ma,Shanbo Zhang,Shengming Zhang,Peiyu Li,Jiayue Li,Shuai Lei,Wei Sun,Guoxiang Zheng
To enhance the yield of biohydrogen production from corn straw, a methodology involving the synthesis of deep eutectic solvent (DES) using hydrogen bond acceptor [Emim][OAc] and hydrogen bond donor 1,4-butanediol and its application in the pretreatment was investigated. DES was prepared by mixing [Emim][OAc] and 1,4-butanediol solution with a concentration of 70% at a ratio of 4.7:100 (g:mL), followed by heating and stirring at 60 °C for 30 min. The optimal conditions for DES pretreatment were as follows: the liquid-solid ratio of the volume of DES to the mass of corn straw was 50:1 (mL:g), and the reaction temperature and reaction time were 121 °C and 1 h, respectively. The hydrogen yield was approximately 138.3 mL/g of corn straw. The comprehensive analysis outcomes derived from chemical analysis, FT-IR, 13 C NMR, XRD, TGA, and BET demonstrated that the hydrogen bonds within lignocellulose, the ester bonds between hemicellulose and lignin, the β -1,4 glycosidic bonds of cellulose and hemicellulose, and the β - O -4 bonds of lignin were disrupted, leading to the elimination of 86.79% of hemicellulose and 74.69% of lignin, thereby increasing the yield of hydrogen production from corn straw by 591.5%. The pretreatment efficacy of DES prepared from the fourth recycled [Emim][OAc] on corn straw did not deteriorate conspicuously. This study can offer a theoretical foundation for efficient hydrogen production from lignocellulosic biomass pretreated by DES.
研究领域:
生物能源
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS ES&T Engineering
·
2025
·
IF 6.7
Jiayin Hao,Huihui Zhou,Kun Feng,Zheng Zhong,Jing Wang,Chuandong Wu,Rui Fang,Defeng Xing
Effective management of food waste (FW) is essential for achieving energy self-sufficiency and carbon neutrality in food waste treatment plants (FWTPs). Developing a multitandem and efficient FW treatment process is crucial for performing more energy recovery at on-site plants. In this study, a cascading process was developed to treat FW from generation to complete disposal. Compared with the unpretreated FW (UP-FW), enzymolysis exhibited higher hydrolysis efficiencies for FW. Specifically, the concentrations of glucose, chemical oxygen demand, and total organic carbon increased by 259.42%, 49.31%, and 33.08%, respectively. The pretreated FW exhibited a considerable hydrogen yield of 35.81 ± 1.47 mL/g-VS, roughly double that of raw FW used as the substrate, which was also accompanied by 26.52% and 19.10% increases in ethanol and acetate production, respectively. The recyclable catalyst (FRB800) pyrolyzed from the fermentation residue showed superior Orange G (OG) removal efficiency and better anti-interference ability in the actual water body. OG could be completely removed within 30 min, dominated by singlet oxygen, nonradical pathways, and diverse active sites on FRB800. This process synchronizes the recovery of hydrogen and resources with the degradation of pollutants. Overall, these findings indicate that the cascading process is an alternative approach to the complete disposal of food waste and possesses significant engineering value and broad application prospects for FWTPs.
研究领域:
环境科学
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生物工程
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2023
·
IF 6
Chengxuan Zhou,Danni Deng,Chao Huang,Yu Xie,Hang Dong,Yujiao Wen,Bo Li,Zhi Zhou,Wei Luo,Zhonghua Zhou
The search for cost-effective, high-performance catalysts is crucial in catalytic co-pyrolysis. Different Fe-Mo@X catalysts (X = Al 2 O 3 , MgO) and reaction temperatures (600 ℃, 700 ℃, 800 ℃, 900 ℃) were tested to optimize hydrogen production and carbon quality while also exploring CNTs degradation performance. The results indicate that both catalyst type and operating parameters are highly dependent on the growth of carbon nanotubes and hydrogen. The FeMo@Al 2 O 3 catalyst exhibits superior catalytic activity attributed to its more abundant mesoporous structure and higher specific surface area. Specifically, FeMo@Al 2 O 3 achieved the highest yield of carbon nanotubes (84.42%) at 700 ℃, and attained the maximum hydrogen yield (49.57%) at 900 ℃. However, the CNTs synthesized from FeMo@MgO exhibited fewer defects, higher graphitization degree and purity (Raman and TPO). CNTs/MgO significantly enhanced the degradation efficiency of Clothianidin by virtue of their superior electron transport properties and chemical bonding between MgO and CNTs.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2019
·Vol. 6
·期 4
·046532
·
IF 1.449
Chen Chen,Binxu Lan,Kang Liu,Hongbo Wang,Yuxin Deng,Yufei Zuo,Xiaohan Xu,Cheng Chen,Zhen Chen,Ping Luo,Shijie Dong
Herein, we prepared Al–Bi–NaCl composites by mechanical ball milling and investigated the effects of ball milling time on their hydrogen production performance, additionally analyzing energy conversion during ball milling. Subsequently, the effects of Bi and NaCl content and initial temperature on hydrogen production performance were studied. Moreover, the phase, morphology, and elemental composition of these composites and by-products of their hydrolysis were studied by a range of instrumental techniques. An optimal hydrogen yield of 1140 ml g−1 (in 1 h) was obtained at a milling time of 4 h, and the results of instrumental characterization showed that no new phase was formed during ball milling (i.e., Al, Bi, and NaCl were only mechanically mixed) and that the constituent elements were evenly distributed in the composite. Hydrolysis by-products were identified as porous Al(OH)3 and AlO(OH), that is, Bi did not participate in the reaction.
研究领域:
材料科学
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
WASTE MANAGEMENT
·
2019
·
IF 5.431
Hongcai Su,Ekkachai Kanchanatip,Defeng Wang,Rendong Zheng,Zhicheng Huang,Yang Chen,Ishrat Mubeen,Mi Yan
In China, waste sorting practice is not strictly followed, plastics, especially food packaging, are commonly mixed in food waste. Supercritical water gasification (SCWG) of unsorted food waste was conducted in this study, using model unsorted food waste by mixture of pure food waste and plastic. Different operating parameters including reaction temperature, residence time, and feedstock concentration were investigated. Moreover, the effect of three representative food additives namely NaCl, NaHCO 3 and Na 2 CO 3 were tested in this work. Finally, comparative analysis about SCWG of unsorted food waste, pure food waste, and plastic was studied. It was found that higher reaction temperature, longer residence time and lower feedstock concentration were advantageous for SCWG of unsorted food waste. Within the range of operating parameters in this study, when the feedstock concentration was 5 wt%, the highest H 2 yield (7.69 mol/kg), H 2 selectivity (82.11%), total gas yield (17.05 mol/kg), and efficiencies of SCWG (cold gas efficiency, gasification efficiency, carbon gasification efficiency, and hydrogen gasification efficiency) were obtained at 480 °C for 75 min. Also, the addition of food additives with Na + promoted the SCWG of unsorted food waste. The Na 2 CO 3 showed the best catalytic performance on enhancement of H 2 and syngas production . This research demonstrated the positive effect of waste sorting on the SCWG of food waste, and provided novel results and information that help to overcome the problems in the process of food waste treatment and accelerate the industrial application of SCWG technology in the future.
研究领域:
环境科学
·
能源工程
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ENERGY INSTITUTE
·
2025
·
IF 6.2
Weiqi Chen,Tingting Xu,Runtian Yu,Zhimei Shu,Jiayi Xiao,Dong Liu
Flame synthesis of oxygen carriers (OCs) with specific functions remains challenging. In this study, the brownmillerite Ca 2 Fe 2 O 5 OCs properties are precisely regulated by adjusting the type of ester solvent, oxygen concentration, and carrier gas flow rate during diffusion flame synthesis. The utilization of flame-synthesized OCs in the chemical looping reforming coupled with water splitting (CLRWS) to produce syngas and hydrogen has been elucidated. At a high oxygen concentration (60 % O 2 ), OCs synthesized using propyl propionate solvent aerosol flame, yielding 33 nm polycrystalline particles, exhibit exceptional performance with an 82.6 % fuel conversion rate, 3.09 Nm 3 /L syngas yield, and 11.16 mmol/g OC hydrogen yield at 850 °C, surpassing classical methods. The high reduction capacity and lattice oxygen activity can be attributed to the multiple exposed crystal faces and active sites. This study aimed at regulating and producing OCs with excellent activity for biomass utilization and catalysis.
研究领域:
材料科学
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能源化学
·
催化化学
·
化学工程
·
纳米材料
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可再生能源
·
多相催化
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2015
·
IF 2.79
Shangzhe Sun,Ming Zhao,Liang Cai,Shuai Zhang,Dewang Zeng,Rui Xiao
The iron-based oxygen carrier with high oxygen transfer capacity has always been the key point in the chemical looping hydrogen generation (CLHG) process. In this study, CeO2-modified iron-based oxygen carriers with the porous reticular structure were prepared by the sol–gel method. Samples were tested in a thermogravimetric analyzer (TGA) and lab-scale fixed-bed reactor, respectively, to evaluate their capacities of hydrogen production and the resistance to carbon deposition or Fe3C formation. The effects of preparation conditions (CeO2 loading and [C6H8O7·H2O]/[PEG400] molar ratio) and experimental conditions (reducing atmosphere and temperature) on the physicochemical properties of CeO2-modified iron-based oxygen carriers were investigated. The initial screening test in TGA was done to select the samples with excellent reducibility and strong resistance to carbon deposition or Fe3C formation. Subsequent tests in the fixed-bed reactor were conducted to evaluate the redox characteristics and cyclic performance of the selected CeO2-modified samples. The results confirmed that iron-based oxygen carriers modified by CeO2 could effectively inhibit carbon deposition or Fe3C formation and the oxygen carrier prepared under the preparation conditions of Fe2O3/CeO2/Al2O3 = 65/5/30 and C6H8O7·H2O/PEG400 = 3 stood out from all the candidates by virtue of its high hydrogen production efficiency and the excellent recycle ability in the CLHG process. The oxygen carriers at the optimal reducing atmosphere (CO/H2/N2 = 40/30/30 and the steam oxidation reaction at 900 °C) showed the best performance with the highest hydrogen yield.
研究领域:
能源材料
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
RENEWABLE ENERGY
·
2025
·
IF 9.1
Shanshan Shao,Zixuan Huang,Xiaohua Li,Weicheng Wang,Shiliang Wu
In this study, the impact of pre-reforming procedure on the intermediate products and the production of hydrogen in the two-stage steam reforming of bio-oil generated from pine sawdust was explored. The evolution of the intermediate products in the liquid and gas phase affected by the pre-reforming catalyst (red mud, dolomite, biochar) and pre-reforming temperature was investigated, as is impact of intermediate products on the hydrogen production. The findings indicate that dolomite was identified as the most effective pre-reforming catalyst due to its high CaO/MgO content, which promoted the Boudouard reaction more effectively than the Fe 2 O 3 in in red mud. Low-temperature pre-reforming (≤450 °C) was more beneficial than high-temperature pre-reforming (≥550 °C) at which coke precursors, including aromatic hydrocarbons and phenols were easily produced, leading to rapid catalyst deactivation. Liquid-phase intermediates were primarily composed of furans, phenols, and ketones, with ketones accounting for up to 55.63 %, which may be related closely to the greatly promoted ketonization by the alkaline Ca(OH) 2 produced via the combination dolomite and water at low temperature. Ketones were actually more favorable to the second-stage reforming over Ni-based catalysts, and the ultimate hydrogen yield reached 66.52 %. Due to the low inclusion of phenol and aromatic hydrocarbon intermediates less susceptible to carbon deposition, the catalyst could be more stable. The two-stage steam reforming of pyrolysis bio-oil can avoid catalyst deactivation and enhance the hydrogen production to a higher degree, accomplished by changing the intermediates components with varied pre-reforming catalysts and temperatures.
研究领域:
能源化学
·
催化科学
·
生物质转化
·
氢能源
·
反应工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2014
·
IF 2.93
M. Gong,W. Zhu,H.W. Zhang,Q. Ma,Y. Su,Y.J. Fan
Dewatered sewage sludge was treated with NaOH additive and Ni catalyst in supercritical water in a high-pressure autoclave to examine the effects of separate and combined NaOH additive and Ni catalyst on hydrogen generation . The effects of Ni/NaOH ratio on hydrogen production were also investigated to identify possible catalytic mechanism and interactions. NaOH and Ni, separately or in combination, improved the hydrogen production and hydrogen gasification efficiency. The addition of NaOH additive not only promoted the water–gas shift reaction, but also favored H 2 generation of Ni catalyst by capturing CO 2 . The hydrogen yield of combined catalysts with different Ni/NaOH ratios was higher than the theoretical sum of hydrogen yield from the mixture by 10–33%. The largest hydrogen yield, of 4.8 mol per kilogram of organic matter, which was almost five times as much as without catalyst, was achieved with the addition of 3.33 wt% Ni and 1.67 wt% NaOH. The combined NaOH additive and Ni catalyst also improved the gasification of several other dewatered sewage sludges, increasing the hydrogen yield by four to twelve times that seen without catalyst. Combined NaOH additive and Ni catalyst are effective in dewatered sewage sludge gasification at low temperature.
研究领域:
环境工程
·
能源科学
·
催化化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jingwen Xue,Pengzhao Li,Pengfei Yu,Jinhao Yi,Tao Ma,Hu Liu,Defu Che
The dehydrogenation of dodecahydro- N -ethylcarbazole (H12-NEC) generates enormous gas accompanied by intense heat absorption, affecting heat and mass transfer in porous catalysts. A packed-bed reactor equipped with a temperature measurement device was designed to investigate the continuous flow dehydrogenation of H12-NEC. The effects of weight hourly space velocity (WHSV), reaction temperature, catalyst particle size, and pressure were evaluated. The results reveal that the volume flow rate of hydrogen will increase with the increase of WHSV. And the reduction of gas–liquid ratio and catalyst particle size facilitates heat transfer causing a more uniform axial temperature distribution within the reactor. As the temperature rises, the hydrogen yield increases along with more by-products. 456 K and 2 mm of catalyst particle size are determined to be the optimal reaction conditions in the study, achieving the hydrogen production rate of 9.61 mol H 2 · g Pd -1 · h -1 . With pressure increasing, the hydrogen yield gradually decreases, but the decreased evaporation of H12-NEC results in a smaller temperature difference between the reactor and heating wall. A comparison with the thermodynamic equilibrium model reveals that the effect of pressure on chemical equilibrium may be more significant than the temperature.
研究领域:
化学工程
·
催化反应
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）