FUEL
·
2021
·
IF 6.609
Zhi-Cong Wang,Dabo Chen,Ya-Qi Shan,Lin-Xin Lin,Pei-Gao Duan
In this study, a high-boiling point fraction (HBF, 141-220 °C) from vacuum distillation of a biocrude produced from hydrothermal liquefaction of soybean straw was hydrotreated in a hydrogen donor solvent (HDS) mixture consisting of tetralin and decalin at a mass ratio of 1:1. Effects of temperature (300–450 °C), time (1–6 h), H 2 pressure (0.01–10 MPa), and Pt/C loading (0–40 wt%) on the products distribution and properties of the treated oil were examined. Increasing the temperature, time, and catalyst loading or decreasing the H 2 pressure would reduce the treated oil yield and increase the gas and solid product yields. The presence of HDS mixture played a critical role in favoring the production of treated oil, reducing the formation of gas and solid products, and the removal of N, O, and S from the HBF. Under optimal reaction conditions, 96.3% of N, 87.1% of O, and 98.5% of S were removed from the initial feedstock. The treated oil mainly consisted of saturated hydrocarbon(∼40%, C8-C20) and aromatics(∼41%, naphthalene and benzene derivatives), which was had a comparable cetane number and better combustion characteristics relative to the market 0# diesel.
研究领域:
能源生物学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2012
·
IF 2.237
Jianhua Guo,Renxiang Ruan,Ying Zhang
Phenolic compounds in bio-oil are not stable and difficult to be upgraded to ideal fuels. In this study, simulated bio-oil as well as phenolic compounds separated from bio-oil by glycerol-assisted distillation were hydrotreated by Ru/SBA-15 catalyst and completely converted into C3 to C10 alcohols at mild conditions, which could be a feasible way to transfer the phenolic compounds in bio-oil or other real systems from lignin decomposition into high heating-value liquid fuel or fuel additives. The stability of the Ru/SBA-15 catalyst was also investigated. It was found that Ru/SBA-15 was stable with phenolic compounds in the simulated bio-oil but not in a real one.
研究领域:
能源生物学
·
催化化学
✓ 已验证
DOI
高影响因子
GREEN CHEMISTRY
·
2019
·Vol. 21
·期 12
·3413-3423
·
IF 9.405
Shun Tang,Ze Shi,Xiaohan Tang,Xiaoyi Yang
Biocrudes derived from hydrothermal liquefaction (HTL) and lipid extraction (EXT) of the high-lipid Scenedesmus were hydrotreated to investigate the influences of the feedstock on the profiles of the hydrotreating biofuels. For HTL and EXT biocrudes, similar yields were obtained (52.87% and 49.06%, wt%) but with different fatty acid (60.53% and 66.92%), C (60.28% and 74.40%), H (9.55% and 10.96%), O (26.99% and 13.81%) and N (3.19% and 0.85%) contents (wt%), HHVs (29.19 and 38.33 MJ kg−1) and chemical constituents (fatty acids and triglycerides), respectively. After hydrotreatment, 0.45 g HTL and 0.42 g EXT biofuels were obtained from 1 g Scenedesmus, with different heteroatoms (9.14% and 1.01%) and HHVs (42.77 and 48.85 MJ kg−1), respectively. However, a certain number of heavy products, such as C30+ hydrocarbons and C31+ esters, were found in both biofuels. By adjusting the reaction conditions, including the temperature and catalyst loading, the content of heavy products decreased from a maximum of 26.24% to a minimum of 1.30% at 350 °C with a 50% catalyst loading. Based on the hydrotreating model fatty acids and esters, the proposed reaction mechanism demonstrated that the formation of heavy products could be inhibited using EXT biocrude instead of HTL biocrude as the feedstock.
研究领域:
能源生物学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2018
·
IF 4.908
Fei Wang,Jianchun Jiang,Kui Wang,Qiaolong Zhai,Hao Sun,Peng Liu,Junfeng Feng,Haihong Xia,Jun Ye,Zhengxiang Li,Fanglin Li,Junming Xu
The activated carbon supported Mo 2 C and W 2 C were synthesized successfully for hydrotreatment of fatty acids to produce diesel-like hydrocarbons. The carburization temperature, carburization gas as well as metal loading amount were studied. High carburization temperature was feasible for W 2 C/AC, but not for Mo 2 C/AC because it resulted in agglomeration of molybdenum compound and destruction of catalyst. Under hydrotreatment condition (360 °C, H 2 3.0 MPa, 3.0 h) the conversion achieved 96.01% over Mo 2 C/AC prepared at 700 °C and 54.88% over W 2 C/AC prepared at 900 °C respectively. During carburization both flowing nitrogen and hydrogen were proper for formation of W 2 C/AC, while only flowing hydrogen was appropriate for Mo 2 C/AC. The hydrotreatment parameters (reaction temperature and reaction time) were also investigated. The high reaction temperature and long reaction time facilitated the conversion of fatty acids, meanwhile the high reaction temperature simultaneously improved the cracking degree of products.
研究领域:
催化化学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
Biomass Conversion and Biorefinery
·
2021
·Vol. 13
·期 10
·9045-9056
·
IF 4.987
Liu Peng,Xu Junming,Li Jing,Zhou Minghao,Shang Shibin,Zhao Jiaping,Jiang Jianchun
Triglycerides is a kind of natural oil widely existing in animals and plants, and it is also an ideal raw material for preparing biomass liquid fuel. Selectively hydrotreatment of unsaturated glyceride is an important strategy for the production of fuels and chemical feedstocks. In this work, catalytic hydrotreatment of triglycerides over Ni-based catalysts was investigated. Thus, an array of metal–organic frameworks derived Ni@C catalysts synthesized under different temperatures (350 °C, 400 °C, 450 °C) were prepared and applied for hydrotreatment of triglycerides. The highest conversion of triglycerides was 98.9% and the cracking rate could achieve 4.61% over the optimal Ni@C-BTC-400 catalyst in cyclohexane at 320 °C. The physicochemical characterizations were carried out by means of powder X-ray diffraction, scanning electronic microscopy, thermo gravimetric analyzer, N 2 adsorption–desorption, and Raman. Based on the optimal reaction condition (320 °C, 3 h, 3.0 MPa H 2 ), five typical vegetable oils and gutter oils were selected for the hydrotreatment study to investigate the adaptability of Ni@C-BTC-400 catalyst. The result indicated that Ni@C-BTC-400 catalyst performed good universality, and could transform oil raw materials with different fatty acid carbon chain structure to desired alkanes. Furthermore, the optimal Ni@C-BTC-400 catalyst could be carried out in next two consecutive recycling runs and could also be regenerated by H 2 for the following experiments.
研究领域:
能源科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2016
·Vol. 52
·期 4
·2200-2209
·
IF 2.302
Liu Yong,Zhang Xuefeng,Dong Shangli,Ye Zhuyu,Wei Yidan
The highly exfoliated Ti 3 C 2 T
x
nanosheets were synthesized by selective etching of the starting material of Ti 3 AlC 2 using 40 % concentrated HF solution at 65 °C for 5 h. The effect of HF treatment temperature on the exfoliation degree was investigated by characterizing the morphology and microstructure of the Ti 3 C 2 T
x
nanosheets using SEM, XRD, and TEM. The results showed that the exfoliation degree of Ti 3 C 2 T
x
was increased with increasing temperature. The role of the termination groups produced during HF treatment on the exfoliation degree was discussed. The tribological property of the prepared Ti 3 C 2 T
x
nanosheets as additives in PAO8 base oil was measured. The maximum reduction of friction and wear was achieved under additive concentration of 0.8 wt% for the highly exfoliated Ti 3 C 2 T
x
nanosheets. The different effects of Ti 3 C 2 T
x
additives on the average friction coefficient and wear volume were analyzed, respectively.
研究领域:
材料科学
·
摩擦学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Yunhui Xia,Nan Xi,Xinyang Yu,Maohua Luo,Shi Chen,Qinglian Wang,Yixiong Lin,Rong Wang,Hao Li,Jun Yue,Chen Yang,Wang Yin,Ting Qiu
Catalytic hydrotreatment is one of the promising routes for upgrading pyrolysis liquids (PLs) to intermediates that can be co-fed with vacuum gas oil for FCC refinery. Among all the factors, catalysts are always crucial in catalytic hydrotreatment of PLs as hydrogenation and repolymerization reactions occur in parallel. Therefore, catalysts with sufficient hydrogenation activity are generally required to enhance the hydrogenation reaction and to inhibit the repolymerization reaction of the thermally liable compounds in PLs. Among all noble metal catalysts tested, Ru/C catalysts showed a better performance than other catalysts in terms of the oil yield and deoxygenation level. However, a clear repolymerization was observed during catalytic hydrotreatment of PLs using Ru/C catalysts, especially during mild hydrotreatment, thus there is still ample room for their activity improvement. Here, a series of Ru-based catalysts supported on nitrogen-doped carbon materials (NC) and activated carbon (AC) were prepared. The catalytic performance was evaluated for hydrotreatment of PLs in a batch autoclave (250 °C, 8 MPa H 2 , 4 h for mild hydrotreatment; 340 °C, 6 MPa H 2 , 4 h for deep hydrotreatment). The Ru catalyst supported on nitrogen-doped carbon materials, obtained by the polyol reduction method with polyvinylpyrrolidone (PVP) as the protective agent (Ru/NC (PVP)), showed a better performance (in terms of product oil properties) than the other catalysts investigated in this work, due to a good distribution of the ruthenium nanoparticles. For mild hydrotreatment the H/C ratio, O/C ratio and MCRT value were 1.42, 0.37 and 9.9 wt%, respectively. For deep hydrotreatment the H/C ratio, O/C ratio and MCRT value were 1.26, 0.16 and 4.6 wt%. The comparison with results published earlier for other hydrotreatment catalysts is satisfactory but also shows room for further improvement. GC–MS and 1 H NMR results showed that the contents of thermal liable components like aldehydes (16.7 %), ketones (24.3 %) and sugars (4.0 %) in PLs were quantitatively converted under mild hydrotreatment, while phenols and alkanes significantly increased from 35.9 %, 0 % to 49.1 %, 35.3 %, respectively, especially for deep hydrotreatment compared with PLs feed. The catalyst characterization revealed that Ru/NC (PVP) with the most uniform dispersion and the smallest average particle size (1.5 nm), rendered the best performance. These findings indicate that Ru/NC (PVP) catalyst is a promising candidate for the catalytic hydrotreatment of PLs.
研究领域:
能源科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2025
·
IF 8.4
Guodong Xu,Junlian Wang,Fei Xu,Guoyong Huang,Shengming Xu,Bin Wu
It is imperative to recover the valuable components of spent HPCs. We have proposed a hydrometallurgical process and recovered 99.9% of V, 99.9% of Mo, and 95% of Al in our previous work. In this study, we focused on the Co and Ni recovery from the alkaline leaching residue of spent HPCs. We characterized the leaching residue by SEM-EDS, XPS, TGA, Laser Particle Size Analyzer, and ICP-OES. The Ni and Co leaching rates both reached around 95% with 2.0 mol/L H 2 SO 4 at 120 °C for 75 min. The impurity of Al in the leachate was removed via solvent extraction with 30% P204 at A/O of 1 and pH equilibrium of 2.0. The Co and Ni in the raffinate was separated via two stages of counter-current extraction with 20% Cyanex 272 at A/O of 1 and pH equilibrium of 5.7. The CoSO 4 and NiO products were characterized by XRD, and there are no impurity peaks. We also did DFT calculations, which show the binding energies of Al 3+ with extractants are in the order of Al 3+ -P204 > Al 3+ -P507 > Al 3+ -Cyanex 272, and Cyanex 272 exhibits the highest difference in binding energies of Ni 2+ and Co 2+ . The process of Ni and Co recovery from the alkaline leaching residue of spent HPCs was proposed. Only 8 t CO 2 and 120 kg SO 2 emissions were generated during all the component recovery per ton of the spent HPCs using our proposed process. They are much less than pyro-hydrometallurgical processes.
研究领域:
环境科学
·
冶金工程
✓ 已验证
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2018
·
IF 6.14
Chao Ju,Meng Wang,Yong Huang,Yunming Fang,Tianwei Tan
Biojet fuel production has attracted a lot of research interest due to the double threats of fuel shortage and environmental concerns. This paper works on the high-quality jet fuel blend production by oxygen-containing terpenoids hydroprocessing. Hydroprocessing of three typical oxygen-containing terpenoids (geranyl acetone, nerolidol, and geraniol) over Pt/Al2O3 was first studied. The results indicate that the coexistence of branched carbon backbone, carbon–carbon double bond, and oxygen-containing functional group makes the terpenoids highly reactive during the hydroprocessing. The Pt/Al2O3 catalyst, which is considered to have a mild acidity, is still too active in terpenoids hydrogenation and results in large heat release and extensive side reactions. Hence, Pt supported on a support with a milder acidity and better diffusion property was proposed to build a suitable terpenoids hydroprocessing catalyst. Pt/Al-MCFs (MCF: mesocellular silica foam) were then successfully prepared, characterized, and tested in this reaction. Acidic sites could be introduced into MCFs by Al grafting of the pure silica MCF. The acidities of MCF supports, and consequently Pt/MCFs, could be fine-tuned by the Si/Al ratio in the resulting supports. Pt/Al-MCF-20 with a milder acidity than Pt/Al2O3 shows an excellent performance in geranyl acetone hydroprocessing with complete deoxygenation, limited side reaction, and high stability. Characterization results of Pt/Al-MCFs and Pt/MCF indicate that Al introduction is critical for the stable performance. The products obtained from geranyl acetone hydroprocessing over Pt/Al-MCF-20 are highly promising as jet fuel or jet fuel blend due to their multibranched alkane and alkyl-cycloalkane nature, which meets all the specifications of ASTM 7566 in the desired freezing point (−72 °C), density (0.80 g/mL), flash point (51 °C), heat of combustion (45 MJ/kg), and aromatics content (<1%).
研究领域:
能源科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Fei Wang,Wenjuan Zhang,Jianchun Jiang,Junming Xu,Qiaolong Zhai,Linshan Wei,Feng Long,Chao Liu,Peng Liu,Weihong Tan,Daheng He
The hydrotreatment of lipids is regarded as a renewable and promising approach to produce green diesel to confront environmental issues. The molybdenum carbide catalyst displays noble metal-like activity for lipid hydrotreatment; however, the active sites on the catalyst typically have a large particle size and are unevenly dispersed, thereby severely limiting its catalytic performance. Herein, ultrafine MoC nanoparticles supported on nitrogen-rich carbon (MoC/CN) were prepared, and their activity for the hydrotreatment of oleic acid was compared with that of Mo 2 C supported on mesoporous carbon (Mo 2 C/MC). In the hydrotreatment test, the MoC/CN catalyst exhibited remarkable activity with 94.3% conversion and 90.3% selectivity at 310 °C; these values were much higher than those of the Mo 2 C/MC catalyst (84.8% and 70.1%, respectively), even at 350 °C. The excellent performance of MoC/CN is ascribed to the sufficient amounts of pyridinic N and pyrrolic N in nitrogen-rich carbon, which provide anchoring sites for the molybdenum precursor, leading to the fine particle sizes of the active sites and a uniform dispersion. The density functional theory (DFT) calculations show that MoC/CN can better facilitate the dissociative adsorption of hydrogen than Mo 2 C/MC, which explains the high activity of the Mo 2 C/MC catalyst in the hydrotreatment reaction. The carburization temperature and Mo loading content have a considerable effect on the MoC formation and surface area of the MoC/CN catalyst and thus greatly influence the catalytic activity. Moreover, the hydrotreatment conditions, including the reaction temperature and hydrogen pressure, were also investigated.
研究领域:
催化化学
·
能源科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
FUEL PROCESSING TECHNOLOGY
·
2022
·
IF 8.129
Hao Zhu,Fei Wang,Jianchun Jiang,Zeng Zhang,Yuchan Du,Junfeng Feng,Xiaoxiang Jiang
In order to deal with the deficiency of active sites in Ni catalyst, Ni Fe nanosheet (Ni-Fe/Al 2 O 3 -NS) catalyst was synthesized by using Ni-Fe-Al LDH as the precursor. The catalyst was further utilized in the lipid hydrotreatment for green diesel production. With a lamellar structure and large Ni loading (more than 60%), the Ni-Fe/Al 2 O 3 -NS catalyst possessed abundant Ni sties with high dispersion, large surface area, and strong acidity. Moreover, in Ni-Fe/Al 2 O 3 -NS the highly active Ni 3 Fe phase was formed, which promoted the decarbonylation route in hydrotreatment. The Ni-Fe/Al 2 O 3 -NS catalyst achieved 98.7% conversion with 98.1% alkane yield in oleic acid hydrotreatment under very mild conditions (220 °C, 2 MPa of hydrogen pressure, 3 h). The catalytic performance of Ni-Fe/Al 2 O 3 -NS was much higher than traditional Ni-Fe/Al 2 O 3 and other catalysts reported in current related studies.
研究领域:
催化化学
·
能源材料科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Songyin Yu,Fei Wang,Jianchun Jiang,Xinyi Luo,FeiFei Xing,Taotao He,Junfeng Feng,Xiaoxiang Jiang
The Co catalysts for lipid hydrotreatment into green diesel commonly has a poor dispersion of Co and big Co particle size due to metal agglomeration, limiting its catalytic performance. To solve this problem, three Co catalysts on activated carbon (AC), Al 2 O 3 , and nitrogen-doped carbon (NC) are prepared, among which the Co/NC is synthesized by using the Co metal-organic framework (MOF) as the precursor. In the hydrotreatment of oleic acid , the Co/NC catalyst attained 99.6% conversion and 99.6% alkane yield, much higher than Co/AC (76.8% and 14.9%) and Co/Al 2 O 3 (96.3% and 18.7%). From the characterizations of the catalyst, the excellent performance is ascribed to its lamellar structure , large specific surface area, and high dispersion of Co sites, providing massive Co-active sites for hydrotreatment reaction. Moreover, the catalytic performance of Co/NC under various hydrotreatment temperatures with different feedstocks is investigated.
研究领域:
催化化学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）