BIOMASS & BIOENERGY
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2022
·
IF 5.774
Yanlin Xu,Zhuoyi Liu,Bin Liu,Bin Dong,Yichuan Li,Yanpeng Li,Hailing Guo,Yongming Chai,Chenguang Liu
Pulping black liquor is a serious source of water pollution worldwide, which is very difficult to subsequently treat. Lignin is the main component of the black liquor and is the only natural aromatic recyclable resource, which is burnt as waste in the Kraft pulping industry. Designing an efficient lignin conversion catalyst that suitable for the strong alkaline environment of black liquor harbors tremendous carbon-neutral potential but still remains a scientific and technological challenge. In this work, the strong alkaline environment of black liquor was simulated, and low-cost pretreated Ni/AC catalysts were adopted to the hydrodeoxygenation (HDO) of a lignin model (guaiacol), and a breakthrough was achieved in the efficient transformation of lignin compound into hydrocarbons. By multitechniques, (e.g., FT-IR, XPS , Boehm titration, HRTEM), the relevance between introducing functional acid groups and the surface properties of catalysts was revealed. It is found that the increased acidic groups are responsible for the enhanced C (sp2) -O cleavage reactions, while improving the dispersion of Ni NPs and thus enhance the HDO efficiency. It is worth noting that better selectivity of benzene and lower hydrogen consumption are achieved on Ni/NOAC during the HDO process. Furthermore, the reaction routes of guaiacol on catalysts with different functional acid groups were proposed. This work provides guidance for efficient utilization of lignin in waste black liquor, and is of great significance to the development of sustainable carbon-neutral biorefinery and environmental protection.
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Arabian Journal of Chemistry
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2022
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IF 6.212
Jinjian Hou,Mingyao Cao,Keyi Duan,Lingyu Sun,Shuanglong Lin,Ming Zhang,Wei Li
In this study, we used the Span 80 to enhance solvent extraction process, and we explored the mechanism. The results indicated different solvents would obtain different oil recovery, and toluene showed the optimal oil recovery, and the n-heptane showed the lowest oil recovery. The complex solvents could improve oil recovery. Toluene could make the heavy oil show the lowest viscosity (89.6 Pa.S), and n-heptane make the heavy oil show the highest viscosity (176.3 Pa.S). Complex solvents could decrease the heavy oil viscosities. The higher C/H was, the higher heavy oil recovery was, and when the asphaltene and resins content increase, the C/H would increase. The C/H showed the highest value (9.09, by toluene) and the lowest value (8.15). In this study, Span 80 could increase heavy oil C/H ratio, decrease heavy oil viscosity. Span 80 could make the sands surface more hydrophilic, and then the solvent loss would decrease. The oil recovery was high after 10 times recycle use.
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CATALYSIS LETTERS
·
2022
·Vol. 153
·期 4
·1159-1169
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IF 2.936
Liang Jilei,Fan Mengwei,Wu Wenjie,Wu Mengmeng,Cai Wangshui,Xinxing Gao,Huang Tingting,Rui Haiyun
This study shows the successful encapsulation of sandwich cobalt–tungsten polyoxomolybdate (Na 12 [WCo 3 (H 2 O) 2 (CoW 9 O 34 ) 2 ], abbreviated as CoWPOM) guest in mesoporous metal–organic framework MIL-101 host under static condition via a facile post-synthesis strategy. Several characterizations including powder XRD, FTIR, TGA, SEM–EDS, UV–vis DRS, XRF, and low temperature N 2 adsorption–desorption isotherm demonstrate the incorporation and homogenous-distribution of the sandwich CoWPOM guests in cavities of the MIL-101 host. The CoWPOM@MIL-101 composite possesses a better synergistic effect, and it demonstrates an excellent oxidative desulfurization catalytic activity with the DBT removal of 98.1% and recyclability at least 5 times without obvious activity decrease. Graphical Abstract
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JOURNAL OF APPLIED POLYMER SCIENCE
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2022
·Vol. 139
·期 31
·e52700
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IF 3.057
Wenju Zhang,Yongjun Wang,Xiujun Wang,Yifan Wang,Xiaoyue Zhang,Yan Xiong,Ming Duan,Shenwen Fang
With the increasing amount of oily wastewater produced in the offshore oilfield, more efficient air flotation agent is needed to be developed. Cationic polyacrylate with amphiphilic structure has been found to be a type of potential efficient air flotation agent. However, the effect of molecular structure on its properties and performance was lack of research. In this paper, copolymers with tertiary amine as side group were synthesized by copolymerization of ethyl acrylate (EA) and tertiary amine monomers, and then a series of cationic polyacrylates were prepared by quaternization of tertiary amine with quaternization reagent. The effects of tertiary amine monomer type (including dimethylaminopropyl methacrylamide (DPM) and dimethylaminoethyl methacrylate (DEM)), quaternization reagent type (including 3-Chloro-1,2-Propanediol and 3-chloro-2-hydroxytrimethylammonium chloride) and quaternization degree on the cationic polyacrylate properties and its flotation performance were investigated. The experimental results showed that the flotation performance increased with the increasing hydrophilicity and cation degree of the hydrophilic unit in the cationic polyacrylate. When the tertiary amine monomer was DPM, quaternization reagent was 3-chloro-2-hydroxytrimethylammonium chloride, and theoretical quaternization degree was 100%, the oil removal of product PE-M-1.0 was the highest. When PE-M-1.0 dosage was 50 mg/L, gas flow was 1 L/min, flotation time was 10 min, its oil removal rate was higher than 95% in the range of 20‑60°C. The results of zeta potential measurement and microfluidic experiment showed that PE-M-1.0 can increase the size of oil droplets by destroying the electric double layer on the surface of oil droplets and maintain the stability of bubbles, which was helpful for the improve of gas bubble-oil droplet collision probability and adhesion efficiency.
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CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Junzhen Guo,Liang Chu,Haibin Yang,Zhi Huang,Mu Yang,Ge Wang
Hollow nanomaterials are regarded as the outstanding supports due to their confinement effect and stable carries, which can enhance the performance of the supported catalysts and even simplify the process. In this work, halloysite nanotubes (HNT) are chosen as the support due to their monoclinic tubular structures with two different surface compositions and charges. By a simple impregnation-calcination approach, MoO x is immobilized in the internal surface of HNT, then modify with organosilanes on the external surface of HNT to yield the amphiphilic Mo/HNT/S nanoreactor. The catalyst exhibits prominent activity for oxidative desulfurization in solvent-free system, the desulfurization rate of dibenzothiophene (DBT) reaches 100 % and the turnover frequency (TOF) value reaches 67.5 h −1 at 60 °C with 15 min, which is higher than most reported Mo-based catalysts. The hydrophobic surface enables the nanoreactor to be well dispersed in oil phase, and H 2 O 2 solution in the hydrophilic cavity can extract DBT to form a concentrated microenvironment of the reactants and reactive oxygen species. The confinement function of the HNT nanoreactor can enhance the activity and stability of active ingredients (MoO x ) over at least 5 cycles. Additionally, oxidation products can be retained in the hydrophilic lumen and completely separated from the model fuel. This amphiphilic catalytic system eliminates the following solvent extraction step in the ODS procedure. Thus, the catalyst is a promising candidate for large-scale industrial application.
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JOURNAL OF MOLECULAR LIQUIDS
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2022
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IF 6.633
Xun Zhong,Jiating Chen,Fangzhou Xu,Xingyu Chen
High-efficiency development of low permeability reservoirs is significant to maintaining a balance between energy supply and social needs. Surfactant-based nanofluids with an excellent interfacial activity that can penetrate the small throats and narrow pores are considered promising EOR agents. However, the applications of nanofluids in harsh reservoir conditions remain to be challenging due to high stability requirements. In this work, a highly stable active nanofluid that could withstand high salinity (API brine) and elevated temperatures was prepared by mixing zwitterionic hydroxypropyl sulfobetaine surfactant with low-molecular-weight ligand modified silica nanoparticles. At a surfactant/nanoparticle concentration ratio of 0.5, the spontaneous imbibition recovery factor of dodecyl hydroxypropyl sulfobetaine-based nanofluid was 2.61 times higher than API brine, 1.29 times higher than API brine-based nanofluid and 0.37 times higher than surfactant alone. Meanwhile, the impacts of surfactant carbon chain length, permeability as well as hydrochloric acid were included. Experimental results indicated that surfactants with longer carbon chain length would destabilize the nanofluids due to increasing hydrophobic interactions, and nanoparticle aggregation/precipitation would impose adverse impacts on spontaneous imbibition because of pore/throat plugging. Though increasing permeability could partially ease the negative plugging effects, the potential risks should never be overlooked. Properly using hydrochloric acid could greatly enhance the stability of nanoparticles by forming an “H + ” protection layer and extend their applications to over 80 °C, but the presence of acid also disturbed the adsorption behaviors of surfactants, therefore, different phenomena were noticed when the nanofluid formula changed. A good spontaneous imbibition system should possess both IFT reduction and wettability alteration capabilities, and nanoparticles’ ability to adsorb and disperse polar compounds such as asphaltene should be fully fulfilled. This study provides new guidance for nanofluid formulation to support the effective development of low-permeability oil reservoirs.
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FOOD CHEMISTRY
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2022
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IF 9.231
Wenrui Wu,Ruizhi Tang,Zhouxian Li,Yehua Shen,Shujuan Ma,Junjie Ou
It is prerequisite to efficient extraction of phosphopeptides in bottom-up strategy for protein phosphorylation research. A kind of Ti 4+ -immobilized polydispersed phosphate-rich microsphere was fabricated via inverse suspension polymerization by employing vinylphosphonic acid (VPA) and N,N -methylenebisacrylamide (MBA) as functional monomer and crosslinker, respectively. The resulting microsphere demonstrated excellent sensitivity (as low as 10 fmol), selectivity (the mass ratio of β-casein to BSA digests is 1/500), and adsorption capacity (up to 200 mg g −1 ). What's more, 113 unique phosphopeptides assigned to 25 unique phosphoproteins were indiscriminately identified from 5 μL of pasteurized milk digest, exhibiting great performance in capturing phosphopeptides. In this approach, only two steps were required to synthesize Ti 4+ -IMAC (Ti 4+ -Immobilized metal affinity chromatography). Compared with other methods required multistep modifying process, this strategy is simple and time-saving, offering a prospect of pilot production and commercialization. It is expected that the application of IMAC in milk and other food samples will still make it possible to unravel the huge complexity of the Foodome in the near future.
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PubMed
高影响因子
Advanced Materials Technologies
·
2022
·Vol. 7
·期 11
·2200149
·
IF 8.856
Shuying Wang,Haizhou Huang,Cheng Liu,Yuyan Xia,Changqing Ye,Zewei Luo,Chunhua Cai,Chaolun Wang,Liangjian Lyu,Hengchang Bi,Xing Wu,Litao Sun
Electronic skin (E-skin) is widely used in bionic prosthesis, soft robotics, and wearable electronic devices. Waterproof and breathable membranes that provide a high level of protection and comfort are promising core materials for meeting the pressing demand for E-skin. However, creating such materials exhibiting waterproofness, breathability, and ease of fabrication has proven to be a great challenge. In this paper, waterproof, breathable Modal-based knitted fabric E-skin is proposed by using a simple, low-cost three-step process including the graphene oxide (GO) loading, GO-reducing, and polydimethylsiloxane loading. The prepared E-skin is insensitive to common liquids in daily life including water, tea, milk, and coffee, showing superior waterproof capability. The breathability is also tested with a water vapor transmission rate of ≈13.6 mg cm −2 h −1 . Besides, this E-skin can achieve reliable human motion monitoring. The authors believe this E-skin can provide a reliable principle for further design and development of waterproof and breathable electronic skin.
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CHINESE JOURNAL OF CATALYSIS
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2022
·
IF 12.92
Jiang Zhang,Zijian Wang,Mugeng Chen,Yifeng Zhu,Yongmei Liu,Heyong He,Yong Cao,Xinhe Bao
Deoxygenative upgrading of 5-hydromethylfurfural (HMF) into valuable chemicals has attracted intensive research interest in recent years, with product selectivity control remaining an important topic. Herein, TiO 2 supported gold catalysts coated with a thin N-doped porous carbon (NPC) layer were developed via a polydopamine-coating-carbonization strategy and utilized for pathway-specific conversion of HMF into 5-methylfurfural (5-MF) with the use of renewable formic acid (FA) as the deoxygenation reagent. The as-fabricated Au/TiO 2 @NPC exhibited excellent catalytic performance with a high yield of 5-MF (>95%). The catalytic behavior of Au@NPC-based catalysts was shown to be correlated with the suitable combination of highly dispersed Au nanoparticles and favorable interfacial interactions in the Au@NPC core-shell hetero-nanoarchitectures, thereby facilitating the preferential esterification of HMF with FA and suppressing unproductive FA dehydrogenation , which promoted the selective formylation/decarboxylation of hydroxy-methyl group in HMF in a pathway-specific manner. The present NPC/metal interfacial engineering strategy may provide a potential guide for the rational design of advanced catalysts for a wide variety of heterogeneous catalysis processes in terms of the conversion of biomass source.
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FOOD CHEMISTRY
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2022
·
IF 9.231
Zhengchao Shen,Xin Ma,Muhammad Mujahid Ali,Jiang Liang,Haixia Sui,Zhenxia Du
Herein, a modified indirect method was established for the determination of 3-monochloropropane-1,2-diol esters (3-MCPDEs) and glycidyl esters (GEs), employing magnetic solid phase extraction by boronic acid-functionalized magnetic nanoparticles to replace the traditional clean-up procedure. Compared with routine methods, it has been proved to be more sensitive with limits of detection in the range of 0.02–1.5 μg/kg and less susceptible to contamination of phenylboronic acid derivatives and fatty acid methyl esters. The proposed method was applied to analyze 42 samples covering the entire infant formula (IF) production chain. Results revealed that homogenization process contributed 79–91 % of the total growth of the contaminants due to the vegetable oil addition, while the following evaporation and spray-drying processes contributed 9–21 % of the total growth owing to involved heat treatment. The GE levels in final IF products exceeded the maximum level set by EU regulation 2020/1322, indicating quality safety concerns in the production chain.
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PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Shuisen He,Tingting Huang,Yu Fan
Novel alumina-supported Ni-Mo hydrodesulfurization (HDS) catalysts were prepared via assembly of Mo and Al precursors induced by tetradecylamine (TDA). Compared with conventional impregnation, this assembly method improves Mo dispersion, weakens metal-support interactions, enhances Ni modification at MoS 2 edge sites, and produces more NiMoS phases on Al 2 O 3 . The optimal NiMoS microstructure was obtained by modulating the TDA/Mo ratio in the assembly. A microstructure-activity correlation indicated that the S vacancies at the NiMoS corner sites favored σ-adsorption and direct desulfurization of 4,6-dimethylbenzothiophene (4,6-DMDBT), and those at the NiMoS edge sites promoted C-S breaking in hydrogenated derivatives of 4,6-DMDBT. Among these catalysts, NiTMo-2.0/Al 2 O 3 , which had the most corner and edge S vacancies, exhibited the highest reaction rate constant of 5.89 × 10 −7 mol·g −1 ·s −1 and the highest desulfurization ratio of 99.5% in HDS of 4,6-DMDBT.
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JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2022
·Vol. 105
·期 12
·7122-7131
·
IF 4.186
Yuanjie Wang,Jian Gong,Xueliang Pei,Liu He,Zhengren Huang,Qing Huang
In this study, an SiC ceramic precursor vinyl ether–grafted liquid polycarbosilane (VE–LHBPCS) with approximate formulas of [SiH 1.95 (OCH 2 CH 2 OCH = CH 2 ) 0.05 CH 2 ] n was designed and synthesized. In order to cross-link the ceramic precursor via fast thiol-ene click reaction. The VE–LHBPCS was mixed with 1-wt% ultraviolet (UV) decomposable free radical initiator BAPOs and 7-wt% bis-thiol compound 1,6-hexanedithiol. According to Fourier transform infrared spectroscopy spectroscopy and photolithography experiment, more than 80% vinyl ether group was consumed within 3 s, and photolithography pattern with clear boundary could be formed after UV irradiation for only 1 s. Even for the VE–LHBPCS mixture with a thickness of 4 mm, 20-s UV irradiation was sufficient to cure it with smooth surface and regular edge. Thermal gravimetric analysis demonstrated that the UV-cured VE–LHBPCS mixture had a ceramic yield of 70.0 wt% at 1000°C, which was 20 wt% higher than that of raw LHBPCS. After pyrolysis up to 1000°C, about 29.5% isotropic linear shrinkage associated with the precursor-to-ceramic conversion was observed, and black dense ceramic with a density of 2.49 ± 0.09 g/cm 3 and a chemical formula of SiC 1.01 O 0.18 S 0.04 was obtained. With increasing the pyrolysis temperature, the content of element S decreased and the diffraction peaks of β-SiC became sharper and stronger.
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