Industrial & Engineering Chemistry Research最新文献

{"title":"Balance of the Proton Conductivity and Dimensional Stability of Sulfonated Poly(ether ether ketone) Membranes through Ionic–Covalent Cross-Linking","authors":"Xueyan Lv, Luyang Ding, Xinji Yu, Jihai Duan, Weiwen Wang, Shuguo Qu","doi":"10.1021/acs.iecr.4c04128","DOIUrl":"https://doi.org/10.1021/acs.iecr.4c04128","url":null,"abstract":"To enhance proton transfer within the proton exchange membrane, a combination of ionic and covalent cross-linking strategies was utilized to fabricate sulfonated poly(ether ether ketone) (SPEEK) composite membranes. Side chains of SPEEK were grafted, and then, the ionic cross-linking intermediates were mixed with ionic liquid (IL) [AMIM][Cl] and graphene oxide (GO). Covalent cross-linking was subsequently achieved through the Menshutkin reaction. By adjusting the proportions of IL and GO, SPEEK ionic–covalent cross-linking composite membranes (C-SPEEK/IL/GO) with enhanced performance were synthesized. The establishment of the ionic cross-linking network and the presence of covalent cross-linking within the composite membranes were confirmed using Fourier Transform Infrared Spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS), respectively. The intricate microscopic network structure within the C-SPEEK/IL/GO facilitates rapid proton transport. Consequently, the proton conductivity of C-SPEEK/IL/GO-1% attained a remarkable 47.43 mS·cm^–1 at 120 °C. The ionic–covalent cross-linking network within the C-SPEEK/IL/GO combined membrane endows it with a dense architecture, which constricts the hydrophilic channels, thereby enhancing the membrane’s dimensional stability. Additionally, the thermal stability of the C-SPEEK/IL/GO composite membrane has been significantly enhanced compared to that of the pristine SPEEK.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"18 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143473465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis of Cross-Linked Polyolefin Elastomers with High Performance Yet Good Reprocessability","authors":"Yangke Xiao,&nbsp;Liqian Zhu,&nbsp;Hanyu Gao,&nbsp;Qingyue Wang,&nbsp;Wen-Jun Wang,&nbsp;Bo-Geng Li* and Pingwei Liu*,&nbsp;","doi":"10.1021/acs.iecr.4c0413410.1021/acs.iecr.4c04134","DOIUrl":"https://doi.org/10.1021/acs.iecr.4c04134https://doi.org/10.1021/acs.iecr.4c04134","url":null,"abstract":"<p >The development of polymer materials with high performance and good reusability is critical to sustainability of the polymer industry. However, the balance of these two aspects in elastomers and rubbers is highly challenging. Here, we report the synthesis of a novel polyolefin elastomer (POE) dynamically cross-linked by an imine-linked boronic ester. It improves the tensile strength at break (σ) of POE by 148.2%, Young’s modulus (<i>E</i>) by 92.6%, and the tensile toughness (<i>U</i>_T) by 49.4%, with a slightly decreased elongation at break. The cross-linked POE also has higher thermal resistance than the pristine one and presents a steady storage modulus plateau of 2.8 MPa above 150 °C. Moreover, it can be reprocessed with an impressive recovery ratio of <i>U</i>_T of 89.7% because of the dynamic exchanges of the boronic ester and imine. Dynamic mechanical analysis shows that the cross-linking of an imine-linked boronic ester has a short characteristic relaxation time of 9.6 min and a low apparent activation energy of 65.1 kJ·mol^–1. Our study on dynamically cross-linked POEs provides a new way for the sustainable development of polymer elastomers.</p>","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"64 9","pages":"5080–5086 5080–5086"},"PeriodicalIF":3.8,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143547516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Adsorption of Cr(VI) from Industrial Wastewater Using a Novel Zeolite-A/Fe3O4/Biochar/MOF-5 Composite","authors":"Tessema Derbe, Lijalem Ayele, Teketel Girma Gindose, Gebrehiwot Gebreslassie, Taju Sani, Enyew Amare Zereffa","doi":"10.1021/acs.iecr.4c04282","DOIUrl":"https://doi.org/10.1021/acs.iecr.4c04282","url":null,"abstract":"Disposal of Cr(VI) into environments without adequate pretreatment from various industrial wastes has detrimental effects on human health that range from skin irritation to cancer depending on the dose and the exposure level. Taking this into consideration, a novel Zeolite-A/Fe₃O₄/Biochar/MOF-5 (Z-A/Fe₃O₄/BC/MOF-5) composite was synthesized through the solvothermal method for the adsorption of Cr(VI) from industrial wastewater. The phase structure, surface area, functional group, surface morphology, and elemental composition of the as-synthesized adsorbent were characterized by using XRD, BET, FT-IR, and SEM-EDX, respectively. The batch adsorption was studied by optimizing the adsorption parameters. The maximum adsorption efficiency (95.12%) and adsorption capacity (47.57 mg/g) were obtained at 15 mg/L of initial concentration, 0.3 g/L of adsorbent dose, 120 min of contact time, and pH = 5, respectively. The adsorption isotherm and kinetic of Z-A/Fe₃O₄/BC/MOF-5 composite were well fitted with the Freundlich and pseudo-second-order models, which suggests that the adsorption occurred through chemosorption on the heterogeneous adsorbent’s surface. Furthermore, the recyclability of the Z-A/Fe₃O₄/BC/MOF-5 adsorbent was conducted for five successive runs and resulted in 95.07, 89.59, 85.69, 71.74, and 64.83% for the first, second, third, fourth, and fifth runs, respectively. The synthesized quaternary adsorbent was finally tested on industrial wastewater with a Cr(VI) initial concentration of 36.27 mg/L collected from Batu Tannery Industry PLC, Ethiopia. Interestingly, the Z-A/Fe₃O₄/BC/MOF-5 composite shows higher adsorption performance, 92.85% Cr(VI) removal efficiency, much higher than its pristine MOF-5 (90.57%), binary Z-A/MOF-5 (83.05%), and ternary Z-A/Fe₃O₄/BC (82.83%) composites. This could be due to the synergic effect of the individual materials in the Z-A/Fe₃O₄/BC/MOF-5 composite. Consequently, the quaternary Z-A/Fe₃O₄/BC/MOF-5 composite is promising for the removal of Cr(VI) from industrial wastewater.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"67 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143477508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis of Cross-Linked Polyolefin Elastomers with High Performance Yet Good Reprocessability","authors":"Yangke Xiao, Liqian Zhu, Hanyu Gao, Qingyue Wang, Wen-Jun Wang, Bo-Geng Li, Pingwei Liu","doi":"10.1021/acs.iecr.4c04134","DOIUrl":"https://doi.org/10.1021/acs.iecr.4c04134","url":null,"abstract":"The development of polymer materials with high performance and good reusability is critical to sustainability of the polymer industry. However, the balance of these two aspects in elastomers and rubbers is highly challenging. Here, we report the synthesis of a novel polyolefin elastomer (POE) dynamically cross-linked by an imine-linked boronic ester. It improves the tensile strength at break (σ) of POE by 148.2%, Young’s modulus (<i>E</i>) by 92.6%, and the tensile toughness (<i>U</i>_T) by 49.4%, with a slightly decreased elongation at break. The cross-linked POE also has higher thermal resistance than the pristine one and presents a steady storage modulus plateau of 2.8 MPa above 150 °C. Moreover, it can be reprocessed with an impressive recovery ratio of <i>U</i>_T of 89.7% because of the dynamic exchanges of the boronic ester and imine. Dynamic mechanical analysis shows that the cross-linking of an imine-linked boronic ester has a short characteristic relaxation time of 9.6 min and a low apparent activation energy of 65.1 kJ·mol^–1. Our study on dynamically cross-linked POEs provides a new way for the sustainable development of polymer elastomers.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"19 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143477509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Balance of the Proton Conductivity and Dimensional Stability of Sulfonated Poly(ether ether ketone) Membranes through Ionic–Covalent Cross-Linking","authors":"Xueyan Lv,&nbsp;Luyang Ding,&nbsp;Xinji Yu,&nbsp;Jihai Duan,&nbsp;Weiwen Wang and Shuguo Qu*,&nbsp;","doi":"10.1021/acs.iecr.4c0412810.1021/acs.iecr.4c04128","DOIUrl":"https://doi.org/10.1021/acs.iecr.4c04128https://doi.org/10.1021/acs.iecr.4c04128","url":null,"abstract":"<p >To enhance proton transfer within the proton exchange membrane, a combination of ionic and covalent cross-linking strategies was utilized to fabricate sulfonated poly(ether ether ketone) (SPEEK) composite membranes. Side chains of SPEEK were grafted, and then, the ionic cross-linking intermediates were mixed with ionic liquid (IL) [AMIM][Cl] and graphene oxide (GO). Covalent cross-linking was subsequently achieved through the Menshutkin reaction. By adjusting the proportions of IL and GO, SPEEK ionic–covalent cross-linking composite membranes (C-SPEEK/IL/GO) with enhanced performance were synthesized. The establishment of the ionic cross-linking network and the presence of covalent cross-linking within the composite membranes were confirmed using Fourier Transform Infrared Spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS), respectively. The intricate microscopic network structure within the C-SPEEK/IL/GO facilitates rapid proton transport. Consequently, the proton conductivity of C-SPEEK/IL/GO-1% attained a remarkable 47.43 mS·cm^–1 at 120 °C. The ionic–covalent cross-linking network within the C-SPEEK/IL/GO combined membrane endows it with a dense architecture, which constricts the hydrophilic channels, thereby enhancing the membrane’s dimensional stability. Additionally, the thermal stability of the C-SPEEK/IL/GO composite membrane has been significantly enhanced compared to that of the pristine SPEEK.</p>","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"64 9","pages":"4894–4904 4894–4904"},"PeriodicalIF":3.8,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143547624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thiourea Modification Promoting the Activity on Pt/CeO2 for CO Oxidation by Weakening the Metal–Support Interaction","authors":"Lijun Ni, Wei Tan, Bifeng Zhang, Qi Zhang, Jing Xu, Ying Zhang, Chengsi Pan, Yongfa Zhu, Fudong Liu, Yang Lou","doi":"10.1021/acs.iecr.4c04820","DOIUrl":"https://doi.org/10.1021/acs.iecr.4c04820","url":null,"abstract":"Supported metal catalysts play a vital role in the chemical industry; however, ensuring high activity while maintaining high stability remains a significant challenge. Herein, a strategy for modulating the metal–support interactions (MSIs) in CeO₂-supported Pt-based catalyst via doping N into ceria using thiourea as a dopant (Pt/TA-CeO₂) is proposed, through which excellent low-temperature CO oxidation activity and recycling stability are achieved simultaneously. Experimental characterization results demonstrate that the introduction of thiourea properly alters the structural defects and electronic state of Pt in the Pt/TA-CeO₂ catalyst, thereby weakening the metal–support interaction. As a result, the complete conversion temperature of Pt/TA-CeO₂ decreases from 200 to 150 °C while still maintaining high activity after 11 cycles of CO oxidation. This work offers valuable insights into modulating the catalytic capability in essential reactions by regulating the metal–support interactions in supported metal catalysts.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"3 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143470608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Developing a Circular Economy around Jam Production Wastes","authors":"Carlos Sanz,&nbsp; and ,&nbsp;Mariano Martín*,&nbsp;","doi":"10.1021/acs.iecr.4c0388510.1021/acs.iecr.4c03885","DOIUrl":"https://doi.org/10.1021/acs.iecr.4c03885https://doi.org/10.1021/acs.iecr.4c03885","url":null,"abstract":"<p >A conceptual and scaled-up design of an integrated process is systematically developed to create a circular economy around jam waste based on experimental data from the operation of the units described in the literature. It consists of phenolic compounds extraction, pectin recovery, and the production of a green solvent, ethanol, for internal use and the final product, while the solid residues from several stages can be either gasified or digested to produce thermal energy and power. The base case is a real jam production facility. Waste processing requires around 2 M€/yr to process 37 t/yr of waste, producing 5.2 kg/t of phenolic compounds and 15.9 kg/t of pectin. Both technologies are profitable. However, anaerobic digestion is not only cheaper but also presents a lower entrance barrier, 2.7 (AD) versus 3.4 (GA) M€. A scale-up study is also performed, showing that anaerobic digestion benefits from economies of scale more than solids gasification. The processes are self-sufficient in terms of power but require additional input of thermal energy. In addition, both processes comply with the principles of circularity, achieving an overall circularity index above 0.52.</p>","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"64 9","pages":"4991–5002 4991–5002"},"PeriodicalIF":3.8,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143547623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hydrodynamic and Mass Transfer of Novel Helical Liquid-Bridge Descending-Film Structured Packings","authors":"Ran-ran Jia, Peng-fei Zhu, Hai-feng Cong, Xin-gang Li","doi":"10.1021/acs.iecr.4c04094","DOIUrl":"https://doi.org/10.1021/acs.iecr.4c04094","url":null,"abstract":"The helical liquid-bridged flow process was discovered as a unique flow pattern that offers improved distribution and stability, making it effective for mass transfer applications. A novel helical liquid-bridge descending-film structured packing was developed to improve gas–liquid contact efficiency while minimizing the pressure drop. The experimental setup optimized the gas–liquid distribution by using a specially designed liquid distributor. The study investigated the hydrodynamic behavior and mass transfer performance of the packing by evaluating pressure drop, liquid holdup, residence time, effective mass transfer area, and mass transfer coefficient. Results indicated that the packing exhibited an extremely low pressure drop, superior self-distribution performance, and competitive mass transfer efficiency. Additionally, the system showed high operational flexibility, making it suitable for industrial applications such as CO₂ absorption. The use of monoethanolamine and new absorbents demonstrated the promising potential of the helical liquid-bridged structure for effective carbon capture with reduced energy consumption.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"179 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143470606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancement of Stability and Activity of Pt-Loaded HSiW/UiO-66 Acid Catalyst and Kinetic Modeling for n-Butane Hydroisomerization","authors":"Sajjad Ashrafi,&nbsp;Majid Taghizadeh*,&nbsp;Neda Rezaei and Mahjoobeh Hajitabar Firouzjaee,&nbsp;","doi":"10.1021/acs.iecr.4c0481010.1021/acs.iecr.4c04810","DOIUrl":"https://doi.org/10.1021/acs.iecr.4c04810https://doi.org/10.1021/acs.iecr.4c04810","url":null,"abstract":"<p >In this work, the microporous support UiO-66 was synthesized using the hydrothermal method, and its structure was improved by the impregnation of silicotungstic acid (HSiW) and platinum, resulting in a bifunctional catalyst. The catalyst features acidic and metallic active sites established by the presence of HSiW and Pt in its structure. Various analyses including XRD, FT-IR, FE-SEM, EDS, XRF, BET, NH₃-TPD, and TGA were conducted to assess the chemical properties, surface structure, acidity, and thermal stability. The impact of different concentrations of HSiW on this support was evaluated during the <i>n</i>-butane hydroisomerization process, in which the sample containing 70%HSiW/UiO-66 gave the most favorable results. The addition of Pt (0.5 wt %) as a promoter increased the activity and stability of the catalyst in this process. The 0.5%Pt/70%HSiW/UiO-66 sample demonstrated superior stability against deactivation compared with other modified samples. After 7 h of reaction, it achieved an <i>n</i>-butane conversion of 56.8% and an isobutane selectivity of 74%. Furthermore, the influence of various operating conditions, including the reaction temperature and weight hourly space velocity (WHSV), on catalyst activity, specifically in terms of <i>n</i>-butane conversion and isobutane selectivity, was investigated. The kinetic behavior of the 0.5%Pt/70%HSiW/UiO-66 catalyst in the <i>n</i>-butane hydroisomerization reaction was explained by using the Langmuir–Hinshelwood mechanism. This model was employed to investigate how hydrogen and <i>n</i>-butane pressure influence the reaction rate. The apparent activation energy determined from the Langmuir–Hinshelwood model was found to be 38.51 kJ mol^–1. The value of <i>R</i>² indicated that this model provided a reasonable fit to the experimental data, thereby enabling accurate determination of the kinetic parameters.</p>","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"64 9","pages":"4809–4822 4809–4822"},"PeriodicalIF":3.8,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143547209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thiourea Modification Promoting the Activity on Pt/CeO2 for CO Oxidation by Weakening the Metal–Support Interaction","authors":"Lijun Ni,&nbsp;Wei Tan*,&nbsp;Bifeng Zhang,&nbsp;Qi Zhang,&nbsp;Jing Xu,&nbsp;Ying Zhang,&nbsp;Chengsi Pan,&nbsp;Yongfa Zhu,&nbsp;Fudong Liu and Yang Lou*,&nbsp;","doi":"10.1021/acs.iecr.4c0482010.1021/acs.iecr.4c04820","DOIUrl":"https://doi.org/10.1021/acs.iecr.4c04820https://doi.org/10.1021/acs.iecr.4c04820","url":null,"abstract":"<p >Supported metal catalysts play a vital role in the chemical industry; however, ensuring high activity while maintaining high stability remains a significant challenge. Herein, a strategy for modulating the metal–support interactions (MSIs) in CeO₂-supported Pt-based catalyst via doping N into ceria using thiourea as a dopant (Pt/TA-CeO₂) is proposed, through which excellent low-temperature CO oxidation activity and recycling stability are achieved simultaneously. Experimental characterization results demonstrate that the introduction of thiourea properly alters the structural defects and electronic state of Pt in the Pt/TA-CeO₂ catalyst, thereby weakening the metal–support interaction. As a result, the complete conversion temperature of Pt/TA-CeO₂ decreases from 200 to 150 °C while still maintaining high activity after 11 cycles of CO oxidation. This work offers valuable insights into modulating the catalytic capability in essential reactions by regulating the metal–support interactions in supported metal catalysts.</p>","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"64 9","pages":"4835–4844 4835–4844"},"PeriodicalIF":3.8,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143547216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}