FUEL
·
2020
·
IF 5.578
Gang Chen,Zhichao Zhou,Xiaodan Shi,Xiaolong Zhang,Sanbao Dong,Jie Zhang
Small molecule flow improver for heavy oil recovery has attracted great attention in oilfield chemistry . In this study, 24 alkylbenzenesulfonates were synthesized and evaluated as crude oil flow improvers. The results show that all of the alkylbenzenesulfonates were effective, the chromium alkylbenzenesulfonate (CrDBS) and zinc alkylbenzenesulfonate (ZnDBS) were found to have the best performance with the viscosity reduction rate of higher than 90%. Besides, the CrDBS and ZnDBS can depress the pour point of the crude oil sample by 21.0 °C and 16.0 °C, respectively. The co-crystallization of alkylbenzenesulfonate with the saturated hydrocarbons in the crude oil could disorder the wax crystals and depress the pour point. In addition, DSC was used to reveal the mechanism of viscosity reduction and pour point depressing by alkylbenzenesulfonates. The flow improver can disturb the formation of hydrogen bonds and the π-π interaction bonds among the polycyclic aromatic hydrocarbons and the resin macromolecules . Besides, the field test using ZnDBS confirmed its good performance and promising application potential in enhancing the heavy oil recovery.
研究领域:
石油化学
·
油田开发
✓ 已验证
DOI
高影响因子
WASTE MANAGEMENT
·
2019
·
IF 5.431
Yuanpeng Fu,Yaqun He,Lili Qu,Yi Feng,Jinlong Li,Jiangshan Liu,Guangwen Zhang,Weining Xie
Recycling of valuable metals from spent lithium ion batteries (LIBs) is of great significance considering the conservation of metal resources and the alleviation of potential hazardous effects on environment. Thus, the present work focuses on enhancing the efficiency of leaching process for the recovery of cobalt and lithium from the cathode active materials of spent LIBs. In this study, benzenesulfonic acid (C 6 H 5 SO 3 H) with a reducing agent hydrogen peroxide (H 2 O 2 ) was innovatively used as leaching reagents, and the operating variables were optimized to obtain higher leaching efficiencies. Results show the optimized leaching recovery of 99.58% Li and 96.53% Co was obtained under the conditions of 0.75 M benzenesulfonic acid, 3 vol% H 2 O 2 , a solid to liquid (S/L) ratio of 15 g/L, 500 rpm stirring speed, and 80 min leaching time at 90 °C. Moreover, a new kinetic model was introduced to describe the leaching kinetics of LiCoO 2 from the cathode material. The apparent activation energies E a for leaching of lithium and cobalt are 41.06 and 35.21 kJ/mol, respectively, indicating that the surface chemical reaction is the rate-controlling step during this leaching process. Further, the proposed recovery mechanism for spent cathode material was raised by analyzing the experimental results and characterizing the morphological and chemical state (i.e. SEM-EDS, XPS and XRD) of raw material and leaching residues. In comparison with the previous leaching process, this research was found to be efficient, low energy consumption, and environmental friendly.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2020
·
IF 4.244
Xuelian Zhou,Jue Liu,Tianjiao Huang,Huiyang Bian,Ruibin Wang,Jiulong Sha,Hongqi Dai
Enhanced enzymatic saccharification of Miscanthus (MC) biomass, based on a novel benzenesulfonic acid (BA)-induced fractionation at mild condition as the pretreatment, gives a good example for the efficient transformation of energy crops into value-added products with minimal environmental impact. The results indicated that BA could facilitate the rapid and high solubilization of both lignin and hemicellulose, approximately 90.8 % of lignin and 75.5 % of hemicellulose were removed at 80 °C within 20 min. Consequently, the subsequent enzymatic hydrolysis efficiency was greatly enhanced to obtain an improved enzymatic digestibility with a high glucose yield of 97.9 %. Our study opens up an innovative avenue for the efficient valorization of the recalcitrant energy crops as MC.
研究领域:
生物能源
·
植物学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Han Jia,Juan He,Yingbiao Xu,Tingyi Wang,Lingyu Zhang,Bowen Wang,Xincan Jiang,Xu Li,Xingyuan Zhang,Kaihe Lv
The surfactant assisted nanoparticle stabilized emulsions exhibit the wide potential application and attract more and more attention. In the present study, the flake-like hydrophilic AlOOH nanoparticles were employed to stabilize Pickering emulsions with the assist of slightly amphiphilic sodium benzenesulfonate (SBS) molecules. The measurements of FTIR spectra , three-phase contact angle, zeta potential and Z-average diameter adequately testified the successful adsorption of SBS on AlOOH nanoparticles. Both slightly amphiphilic SBS and highly hydrophilic AlOOH nanoparticles could hardly stabilize emulsions, whereas the SBS modified AlOOH nanoparticles exhibited distinguished emulsifying capacity, which was reflected via the Turbiscan Stability Index and the reference values of backscattered light intensity . Batch adsorption experiments were conducted and the adsorption data was better fitted to the Langmuir model, suggesting that SBS could form monolayer adsorption on AlOOH nanoparticles. Confocal laser scanning microscopy and rheological measurements demonstrated that the functionalized AlOOH nanoparticles could spontaneously adsorb at the oil/water interface to form an interfacial film and generate a three-dimensional network structure in the continuous phase to effectively prevent droplet coalescence in normal and harsh conditions. Furthermore, SBS/AlOOH stabilized O/W emulsions presented significant displacement performance (tertiary oil recovery of 18.87%) in core flooding experiments. Microscopic visualization tests showed that the emulsions could block high permeability channels and enlarge the sweep area. This study opens up the possibility of adopting low surface-active molecules and hydrophilic nanoparticles to stabilize Pickering emulsions for enhanced oil recovery (EOR).
研究领域:
石油工程
·
界面化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2020
·
IF 16.602
Xianquan Zhang,Lintao Yang,Ben Dang,Jiabo Tao,Shujun Li,Shuangliang Zhao,Wei Li,Jian Li,Zhijun Chen,Shouxin Liu
Wood-based solar steam generation devices (W-SSGDs) have enormous potential to produce pure water by distillation since they are sustainable, easily prepared and green. However, most W-SSGDs described so far have low solar-to-thermal efficiency (<1.5 kg m −2 h −1 ) under 1 standard sun irradiation. Inspired by nature, we have now engineered a W-SSGD with improved solar steam generation efficiency by using p -toluenesulfonic acid ( p -TsOH)-assisted hydrothermal treatment . After treatment, the wood lumens became more hydrophilic and were reduced in diameter from 40-60 μm to 10–20 μm. These rationally introduced changes lowered the enthalpy of vaporization of water and greatly enhanced the capacity of the wood for transportation of water. The as-prepared W-SSGD had an evaporation rate of 2.2 kg m −2 h −1 and an efficiency of 87%, which, to the best of our knowledge, are the highest reported values for a W-SSGD.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2022
·Vol. 23
·期 15
·8743
·
IF 6.208
Baojuan Deng,Yadan Luo,Meijiao Peng,Tao Li,Jianwei Su,Yang Wang,Xuelian Xia,Chengqi Feng,Shuangquan Yao
As a green and efficient component separation technology, organic acid pretreatment has been widely studied in biomass refining. In particular, the efficient separation of lignin byp-toluenesulfonic acid (p-TsOH) pretreatment has been achieved. In this study, the mechanism of the atmospheric separation of bagasse lignin withp-TsOH was investigated. The separation kinetics of lignin was analyzed. A non-simple linear relationship was found between the separation yield of lignin and the concentration ofp-TsOH, the temperature and the stirring speed. The shrinking nucleus model for the separation of lignin was established based on the introduction of mass transfer and diffusion factors. A general model of the total delignification rate was obtained. The results showed that the process of lignin separation occurred into two phases, i.e., a fast stage and a slow stage. The results provide a theoretical basis for the efficient separation of lignin byp-TsOH pretreatment.Keywords:p-toluenesulfonic;lignin;mechanism;kinetics;shrinking nucleus model
研究领域:
生物质能
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Ni Wei,Xin Xu,Jiushun Qin,Wei Lai,Ruoyan Li,Chenhuan Lai,Qiang Yong
Development of green pretreatment strategies with excellent lignin removal ability is particularly important for masson pine biorefinery. γ-Valerolactone (GVL), as a green and recyclable solvent, has unique solvent characteristics to extract lignin. In this study, three acid catalysts, including sulfuric acid (H 2 SO 4 ), hydrochloric acid (HCl) and p -toluenesulfonic acid (TsOH), were used to catalyze γ-valerolactone (GVL) pretreatment of masson pine. Among them, the TsOH-catalyzed GVL pretreatment achieved the highest lignin removal ratio and the best cellulose enzymatic hydrolysis yield. Under the optimized pretreatment conditions (150 ℃, 150 mM TsOH, GVL/H 2 O (4:1, w/w), 1 h), the lignin removal ratio reached 89.0 %, achieving a 72 h glucose yield of 87.1 % from the pretreated residues. The solvent lignins from pretreatment liquid was separated and characterized by NMR analysis. Meanwhile, the hexoses in pretreatment liquid were further converted into levulinic acid (LA) using the TsOH-catalyzed bi-phase reaction systems. This study gives insights into developing a biorefining process for the effective utilization of masson pine.
研究领域:
生物化学
·
生物质能工程
✓ 已验证
产品关联
DOI
高影响因子
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
·
2018
·Vol. 96
·期 11
·2443-2449
·
IF 1.265
Jiaming Xue,Zuoxiang Zeng,Weilan Xue,Huayu Yang
The kinetics of the esterification between benzoic acid and isoamyl alcohol has been studied using p -toluenesulphonic acid as a catalyst. The conversion of the benzoic acid was determined by following the concentration of water measured with a Karl Fischer titrator. The effects of the reaction temperature, catalyst concentration, and initial acid to alcohol molar ratio on reaction kinetics have been examined. A five-step assumption was proposed to describe the reaction mechanism for the formation of isoamyl benzoate. And the kinetic model derived from the proposed mechanism can fit well with experimental kinetic data of the esterification, which indicates that the proposed mechanism is reasonable. The nonideality of the liquid reaction mixture has been considered and the activity coefficients of all components were estimated by the UNIFAC model. The reaction rate constants from 353.15 K to 383.15 K have been determined through the least square method. Meanwhile the activation energy and the standard enthalpy change of reaction in the presence of p -toluenesulphonic acid were calculated to be 50.45 kJ/mol and −3.75 kJ/mol respectively.
研究领域:
化学工程
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Advances in Materials Science and Engineering
·
2021
·
IF 1.726
Feng Zhang,Dong-Sheng Wang,Fan Yang,Tian-Yu Li,Hong-Yan Li,Jian-Guo Cui
Sodium benzenesulfonate was doped into polypyrrole-modified granular activated carbon (pyrrole-FeCl3·(6H2O)-sodium benzenesulfonate-granular activated carbon; PFB-GAC) with the goal of improving the modified GAC’s ability to adsorb sulfate from aqueous solutions. At a GAC dosage of 2.5 g and a pyrrole concentration of 1 mol L−1, the adsorption capacity of PFB-GAC prepared using a pyrrole:FeCl3·(6H2O):sodium benzenesulfonate ratio of 1000 : 1500 : 1 reached 23.05 mg g−1, which was eight times higher than that for GAC and two times higher than that for polypyrrole-modified GAC without sodium benzenesulfonate. Adsorption was favored under acidic conditions and high initial sulfate concentrations. Doping with sodium benzenesulfonate facilitated polymerization to give polypyrrole. Sodium benzenesulfonate introduced more imino groups to the polypyrrole coating, and the N+ sites improved ion exchange of Cl− and SO42− and increased the adsorption capacity of sulfate. Adsorption to the PFB-GAC followed pseudo-second-order kinetics. The adsorption isotherm conformed to the Langmuir model, and adsorption was exothermic. Regeneration using a weak alkali (NH3·H2O), which released OH− slowly, caused less damage to the polypyrrole than using a strong alkali (NaOH) as the regeneration reagent. NH3·H2O at a concentration of 12 mol L−1 (with the same OH− concentration as 2 mol L−1 NaOH) released 85% of the sorbed sulfate in the first adsorption-desorption cycle, and the adsorption capacity remained >6 mg g−1after five adsorption-desorption cycles.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2023
·
IF 4.1
Shaohua Fang,Qiuli Xia,Lin Zhang,Peng Zhan,Yan Qing,Zhiping Wu,Hui Wang,Lishu Shao,Na Liu,Jiaying He,Jin Liu
Biomass is the ideal substitute for petrochemical resources because of its renewable and abundant sources. p-Toluenesulfonic acid (p-TsOH) can effectively separate lignin from biomass under mild conditions, so it is highly expected in biomass fractionation to improve the utilization efficiency. In this study, we investigated the effect of p-TsOH differentiated fractionation of poplar sawdust, eucalyptus sawdust, and rice straw below 100 °C. According to the experimental results, upon pretreatment by p-TsOH of the three kinds of raw biomass, most of the lignin and hemicellulose of poplar sawdust and eucalyptus sawdust were removed, whereas the cellulose was retained, but most of the hemicellulose and cellulose of rice straw were kept, whereas the lignin was removed at similar conditions. The structures and compositions of pretreatment residues, lignin, and hemicellulose extracted from raw biomass were characterized by XRD, FTIR, HSQC-NMR, XPS, and SEM. The differentiated fractionation mechanism of biomass was analyzed. A better recognition and understanding of the factors affecting biomatrix opening and fractionation will allow for the identification of new pretreatment strategies that improve biomass utilization and permit the rational enzymatic hydrolysis of cellulose.
研究领域:
生物化学
·
可再生能源
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIORESOURCE TECHNOLOGY
·
2023
·
IF 11.4
Meixin Wang,Yawei Zhan,Jiayue Zhao,Zhiqiang Li
Bamboo and its mechanical processing residues have broad prospects for high value-added utilization. In this research, p-toluenesulfonic acid was used for the pretreatment of bamboo to investigate the effects of extraction and depolymerization of hemicellulose. The response and behavior of changes of cell-wall chemical components were investigated after different solvent concentration, time, and temperature pretreatment. Results indicated that the maximum extraction yield of hemicellulose was 95.16 % with 5 % p-toluenesulfonic acid at 140 °C for 30 min. The depolymerized components of hemicellulose in the filtrate were mainly xylose and xylooligosaccharide, with xylobiose accounting for 30.77 %. The extraction of xylose from the filtrate reached a maximum of 90.16 % with 5 % p-toluenesulfonic acid at 150 °C for 30 min pretreatment. This research provided a potential strategy for the industrial production of xylose and xylooligosaccharide from bamboo and for the future conversion and utilization.
研究领域:
生物质利用
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2019
·
IF 3.131
Huan Wang,Yuhua Wang,Xiaoling Sun,Huiping Hu,Qifan Peng
In this paper, two aminated post-cross-linked polystyrene resins, PSAMPpc and PSAPpc, were correspondingly synthesized from macroporous chloromethylated polystyrene beads (PS-Cl) via a two-step process with amination reaction and Friedel-Crafts reaction. The structures of the resins were characterized by Fourier transform infrared spectrum (FT-IR), Elemental analysis and N 2 adsorption-desorption isotherms, respectively. And the adsorption performances of the resins towards benzene sulfonic acid (BSA) were systematically evaluated by the conduction of batch adsorption experiments. It was indicated that the introduced functional groups greatly improved polarity of the resins, and the Brunauer-Emmett-Teller (BET) surface area was increased after Friedel-Crafts reaction. Furthermore, it was showed that the aminated post-cross-linked PSAMPpc and PSAPpc performed enhanced adsorption capacities in comparison with amino-modified macroporous polystyrene resins PSAMP and PSAP, and the maximum adsorption capacities of PSAMPpc and PSAPpc fitted by Langmuir isotherm model were 370.4 mg/g and 454.5 mg/g (dry basis), respectively. Additionally, the existence of sulfate anion decreased the adsorption capacity of the resins towards BSA from aqueous solutions, whereas PSAMPpc behaved better adsorption selectivity of benzene sulfonic anion over sulfate anion in comparison with PSAPpc. Moreover, with respect to the dynamic adsorption-desorption experiments, the dynamic saturated adsorption capacities of PSAMPpc and PSAPpc were calculated to be 201.21 and 333.62 mg/g (dry basis), respectively. It was found that the BSA-loaded resins could be well regenerated by 0.01 mol/L of NaOH aqueous solution, and PSAMPpc and PSAPpc resins also exhibited satisfactory adsorption efficiencies even after five-cycle adsorption-desorption operations.
研究领域:
化学工程
·
环境科学
✓ 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）