Asia-Pacific Journal of Chemical Engineering最新文献

{"title":"Characterization of carbon nanotubes reinforced PVOH polymer composites added with calcined clam shells with the presence of electron beam irradiation","authors":"Soo-Tueen Bee,&nbsp;Soo-Ling Bee,&nbsp;Lee Tin Sin,&nbsp;Shei-Ching Lee","doi":"10.1002/apj.3006","DOIUrl":"10.1002/apj.3006","url":null,"abstract":"<p>The objective of this research is to scrutinize the effect of electron beam irradiation and filler (calcined clam shell and carbon nanotube) addition on the characteristics of the resulting polyvinyl alcohol (PVOH) blends. Herein, PVOH/calcined clam shells/carbon nanotube (CNT) blends were prepared by solution casting, which followed by electron beam irradiation treatment at the irradiation dosage of 10 and 30 kGy. It was revealed that the addition of CNT and calcined clam shell enhances the tensile strength and elongation at break at 10 kGy irradiation dosage. On the other hand, when 30 kGy irradiation was applied on PVOH blends, high loading of calcined clam shell reduces the tensile strength and elongation at break, while increasing the loading of CNTs increases the tensile strength and elongation at break of PVOH blends. For scanning electron microscope (SEM) analysis, the amount of fibrous presence in fractured part of PVOH blend increased and size of fibrous became thinner and longer when irradiation increased. Besides, a smoother surface can be observed with increased loading of CNTs, while more fibrous are observed with increased of calcined clam shell.</p>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135037166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Noise reduction and characteristic analysis of fluid signal in the jet impact-negative pressure deamination reactor based on wavelet transform","authors":"Xiaodie Huang,&nbsp;Xingzong Zhang,&nbsp;Xingjuan Xie,&nbsp;Facheng Qiu","doi":"10.1002/apj.3001","DOIUrl":"10.1002/apj.3001","url":null,"abstract":"<p>The jet impact-negative pressure deamination reactor (JI-NPDR) is a new type of continuous and efficient deamination equipment. The study of the random flow pattern of porous jet impingement in the reactor under negative pressure conditions is an important issue. In this work, the signal processing method based on wavelet transform is used to analyze the characteristics of random flow signals in the reactor. Meanwhile, an analog similar signal is built and three sets of Gaussian white noise with various signal-to-noise ratios are employed via the MATLAB platform. Based on the adjustment of threshold function, threshold, decomposition level and other parameters of wavelet transform, the noise ratio (SNR) and mean squared error (MSE) are used to evaluate the wavelet denoising effect. And then, the optimal denoising scheme for the obtained signal will be applied in processing the vacuum flow signal collected inside the deamination reactor. Subsequently, the 8-layer wavelet decomposition is investigated by using sym7 as the wavelet basis, soft threshold function, and heursure threshold for signal denoising. Then, the analog signal is fed back through the results of the actual signal denoising, and the number of wavelet decomposition layers is adjusted from 8 to 9 layers to optimize the original wavelet denoising combination. By analyzing the low-frequency and high-frequency parts of the signal spectrum before and after denoising, it was found that wavelet transform can effectively denoise the fluid signal in the reactor.</p>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135725706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploration of entropy analysis and viscous dissipation on radially convective flow of (Cu-Al2O3:H2O) hybrid nanofluid over a stretching disk","authors":"Bhumarapu Venkateswarlu,&nbsp;Panyam Venkata Satya Narayana,&nbsp;Sang Woo Joo","doi":"10.1002/apj.3002","DOIUrl":"10.1002/apj.3002","url":null,"abstract":"<p>The current research work deals with the impact of suction/injection on the thermally radiating convective flow generated by a nonlinear stretched disk. The energy equation is addressed by the presence of thermal radiation and the energy dissipative function. This work was carried out with the help of the Das and Tiwari (single-phase nanofluid) models and the Maxwell Garnett and Brinkman nanofluid models for the analysis of entropy generation. In the present model, nanoparticles of copper (<i>Cu</i>) and alumina (Al₂O₃) are being used with water (H₂O) as the base fluid. The governing nonlinear partial differential equations are transformed into ordinary differential equations with the assistance of appropriate similarity variables. These transformed equations are then solved using the bvp4c function, a built-in function in MATLAB software. The investigation examines the influence of various factors on the velocity and temperature fields, entropy generation, skin friction, and heat transfer rate. The findings show that suction decreases velocity and temperature by 6.59%, while injection has the opposite effect. Viscous dissipation increases velocity by 5.13% and temperature by 17.94% in hybrid nanofluids. Higher Prandtl numbers reduce velocity and temperature by 6% in nanofluids but boost them by 5.45% and 18.81% in hybrid nanofluids with radiation growth. As volume fraction rises, Al₂O₃/H₂O nanofluid speed falls by 5.37%, but Cu-Al₂O₃/H₂O hybrid nanofluid temperature increases by 13.09% and surface drag force increases by 12%. The entropy of the hybrid nanofluid increases by 5.84%, 8.19%, and 14.04% with Eckert number, suction, and Prandtl number but decreases by 10.08% with temperature difference. The Nusselt number of nanofluid decreases by 10.58% and 12.40% with Eckert number and radiation, but hybrid particles increase it by 10.31% with intensified Prandtl number. These findings offer valuable insights for potential applications of hybrid nanofluids in heat transfer and cooling systems.</p>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135936022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Release behavior and biodegradability of controlled-release potassium fertilizer encapsulated in starch–alginate matrix","authors":"Ying Si Chen,&nbsp;Siew Wei Phang,&nbsp;Anis Suhaila Shuib,&nbsp;Jen Looi Tee","doi":"10.1002/apj.2998","DOIUrl":"10.1002/apj.2998","url":null,"abstract":"<p>This work presents the fabrication of potassium chloride encapsulated in starch–alginate matrix, crosslinked by calcium chloride to form hydrogel bead. Sixteen formulations (S1–S16) were designed in four levels sodium alginate (SA 0.5% w/v to 2.0% w/v) and potassium chloride (KCl 5% w/v to 20% w/v) with 10% w/v starch and 0.75 M calcium chloride. The analysis reviewed that a higher concentration of sodium alginate, coupled with a lower KCl concentration, results in enhanced encapsulation efficiency. Notably, hydrogel beads formulated with higher concentrations of SA exhibited a more uniform, spherical shape with compact surfaces. Higher SA concentration has lower the swelling of the beads and therefore reduces its potassium release in general. In another word, with higher SA concentration, the release rate was at a better control to the expected release timeframe. On the contrary, it was also observed that the sample's dissolution in water after 24 h increased with the rising SA content. A higher concentration of sodium alginate led to an increased biodegradation rate, with the biodegradation rate increasing by 25% as the SA concentration was raised from 0.5% to 2% over a period of 5 days. In conclusion, this study represents a preliminary exploration into the viability of encapsulating potassium within a starch/SA matrix, with the optimal ratio of starch, alginate, and potassium was found to be 10:2:5. The significance of this work lies in its potential applications within agricultural practices, particularly in drought-prone regions, owing to its hydrogel properties. By precisely tailoring the starch, alginate, and potassium ratios, this study opens avenues for further advancements in sustainable nutrient delivery systems.</p>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136070365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Ca–Fe composite catalysts on pyrolysis performance of demineralised anthracite and its char structure transformation","authors":"Chengli Wu,&nbsp;Shuhao Shen,&nbsp;Xiang Wu,&nbsp;Hanxu Li,&nbsp;Facun Jiao","doi":"10.1002/apj.2992","DOIUrl":"10.1002/apj.2992","url":null,"abstract":"<p>While catalytic pyrolysis with catalyst addition has been widely studied with a primary focus on optimising gas, tar and char yields, studies exploring the evolution of char structure during coal pyrolysis remain scarce. This knowledge gap potentially affects subsequent char gasification processes during coal conversion within gasifiers. This study presents demineralised anthracite (TM) prepared by HCl–HF acid washing. The pyrolysis performance of TM while adding Ca, Fe and Ca–Fe composite catalysts was investigated through thermogravimetric analysis. The char structure, morphology and functional groups in the obtained char samples were clarified through X-ray diffraction, scanning electron microscopy and Fourier transform infrared spectroscopy, respectively. The results indicated that de-ashing by acid washing promoted the formation of C–O functional groups in coal due to the decomposition of C=O or a combination of oxygen with unsaturated carbon, or both. The TM sample exhibited improved thermal decomposition upon adding either Ca or Fe catalysts, which became more pronounced after adding the Ca–Fe composite catalyst under the same conditions. While the addition of Ca–Fe composite catalysts inhibited the crystalline carbon formation and char graphitisation degree compared to their individual additions, it led to enhanced decomposition of phenol C–O, thereby facilitating the thermal decomposition of TM.</p>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135323027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-pressure high-temperature fluid displacement by foam injection within a multiblock matrix-fracture system","authors":"Alireza Fathollahi,&nbsp;Maryam Khosravi,&nbsp;Behzad Rostami,&nbsp;Ali Saeibehrouzi,&nbsp;Kamran Hassani","doi":"10.1002/apj.3000","DOIUrl":"10.1002/apj.3000","url":null,"abstract":"<p>Foam injection has been suggested and demonstrated as a potential gas-based solution for enhancing oil recovery from underground reservoirs. While the pore-scale behavior of foam has been investigated for many years, most of those studies were done at room temperature and pressure. A high-pressure high-temperature (HPHT) cell was constructed to relax this contributing simplification and evaluate foam behavior under reservoir conditions. The performance of foam injection into a fractured reservoir was investigated experimentally at vertical and horizontal pathways utilizing a 2D microfluidic device. The results showed foam had a higher lamellae density in the fracture network and could direct fluids to the matrix. This was mainly attributed to the created pressure drop in the fractured media dictated by foam self-tuning ability, which is a higher viscosity in areas with higher conductivity. Generating a viscous crossflow in horizontal tests leads to enhanced recovery relative to gas injection. But the presence of gravity in the vertical tests causes the drainage of the foam film and the segregation of the gas and surfactant solution due to gravity, which ultimately reduces the stability of the foam. Comparing the performance of gas and foam in the vertical injection scenario reveals that foam injection results in a considerably more enhanced oil recovery. The oleic phase had a detrimental impact on foam strength and reduced fluids diversion from fracture to matrix. The sizes of gas bubbles were also larger in the presence of the oleic phase.</p>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135322044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An environmentally friendly approach for the extraction and recovery of Mn from pyrolusite by ammonium sulfate roasting-water leaching and ammonium carbonate precipitation","authors":"Ruiyu Ma,&nbsp;Yali Feng,&nbsp;Haoran Li,&nbsp;Jinrong Ju,&nbsp;Shiwei Jiang,&nbsp;Haoyu Wang,&nbsp;Yunhao Li,&nbsp;Chenglong Xu,&nbsp;Zhonghua Xue","doi":"10.1002/apj.2999","DOIUrl":"10.1002/apj.2999","url":null,"abstract":"<p>With the growth of the new energy industry, the requirements for manganese have increased significantly. In this paper, the method of manganese extraction from pyrolusite using ammonium sulfate roasting and water leaching was presented. At the optimal process parameters: mass ratio of (NH₄)₂SO₄ to pyrolusite of 2:1, the roasting temperature of 420°,C and duration of 120 min, the leaching efficiency of Mn and Fe was 94.55% and 54.38%, respectively. The mechanism analysis shows that MnO₂ and Fe₂O₃ in pyrolusite were converted to (NH₄)₂Mn₂(SO₄)₃, (NH₄)₃Fe(SO₄)₃, and NH₄Fe(SO₄)₂ by roasting with ammonium sulfate. Iron was removed from the leaching solution with the addition of ammonia. Afterward, manganese carbonate products were prepared from iron-free manganese sulfate solution by adding ammonium carbonate at a stirring duration of 60 min, a reaction temperature of 40°C, a pH of 7, and a molar ratio of ammonium carbonate to the manganese of 1.1:1, the precipitation efficiency of manganese could reach 99.8%, and the obtained manganese carbonate products were compliant with the industry standards. The ammonia released during the roasting process could be absorbed to regenerate (NH₄)₂SO₄ and the final filtrate after evaporation and crystallization could be used to recycle (NH₄)₂SO₄, both of which were used again into roasting process to reduce the consumption of raw material. In this process, the roasting temperature was only 420°C, which was significantly lower than the pyrometallurgical process suggested in earlier studies.</p>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135315543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Understanding the chemistry of graphene oxide on redox flow lithium-ion batteries with a view to enhancing the battery's high-density storage","authors":"Edwin U. Onoh,&nbsp;Asumpta C. Nwanya,&nbsp;Nanasaheb M. Shinde,&nbsp;Nnamdi Nwulu,&nbsp;Fabian I. Ezema","doi":"10.1002/apj.2995","DOIUrl":"10.1002/apj.2995","url":null,"abstract":"<p>The use of graphene oxide (GO) has shown potential in improving the performance of redox flow lithium-ion batteries (RFLIBs). These types of batteries use a liquid electrolyte containing redox-active species to store and release energy. Despite being scalable, RFLIBs face limitations, namely, low energy density of the electrolyte and reduced cycling stability of the electrodes. However, GO's unique properties, such as its high conductivity as well as large surface area, create an attractive option for enhancing the electrochemical properties of both the electrolyte and electrodes in RFLIBs. When used as an electrode, GO improves the kinetic reversibility reactions, leading to increased electrochemical activity towards redox couples. Charge transfer resistances of positive and negative reactions are reduced, leading to increased voltage energy and efficiency of lithium batteries in terms of energy usage. As redox flow batteries made of lithium ions are an established subsystem and a growing research and development field, there is potential to enhance their performance and reduce costs through the use of GO. The objective of this review is to provide an overview of the chemistry of GO as it pertains to RFLIBs use, covering topics such as its surface chemistry, functionalization, and interactions with redox-active species, as well as its potential for enhancing high-density storage of electricity in batteries. Specifically, it will discuss the impact of GO on redox reactions in the electrolyte, including its ability to raise the redox-active species concentration as well as enhance their stability. The review will also examine how GO impacts the electrodes, including its potential to increase their surface area and conductivity and promote cycling stability. Additionally, the review will address the importance of optimizing the quantity and distribution of GO in both the electrolyte and electrodes of RFLIBs.</p>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135729910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Ni loading onto Pt (Pt-Ni/C) electrocatalysts for PEM fuel cell: A study of ORR activity, stability, and temperature effect","authors":"Rajesh Kumar Polagani,&nbsp;Prashant L. Suryawanshi,&nbsp;Mahendra Chinthala,&nbsp;Sri Hari Kumar Annamareddy,&nbsp;Narendar Nasani,&nbsp;Shirish H. Sonawane","doi":"10.1002/apj.2993","DOIUrl":"10.1002/apj.2993","url":null,"abstract":"<p>Pt is a noble metal when alloyed with transition metals like Ni onto the carbon support, minimizes the cost and increases the oxygen reduction reaction (ORR) activity and stability of Pt-Ni/C electrocatalyst in a low-temperature proton exchange membrane (LTPEM) fuel cell. A simple sonochemical-based synthesis of Pt-Ni/C bimetallic nanoparticles is carried out through varying amounts of Ni and Pt precursors. The various combinations of Pt and Ni metal (50:50, 75:25, and 83:17) nanoparticles were uniformly distributed on a carbon support. The shifting of 2θ values to higher levels in XRD patterns confirmed the alloy formation between Pt and Ni. The carbon (60 wt. %) supported Pt and Ni (40 wt. %) electrocatalyst ink is coated on a carbon paper which acts as a gas diffusion layer (GDL). The electrocatalytic performance of Pt-Ni/C was evaluated in the PEM fuel cell using an electrochemical test station. The best performance was observed with the Pt: Ni (83:17) coated electrocatalyst, which delivered 0.162 W/cm² power at 0.45 V. Also, the PEM fuel cell performance was enhanced by increasing the single cell's operating temperature.</p>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135883337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Process simulation and economic assessments for biodiesel production catalyzed by green Nanocatalysts","authors":"Liow Ke Qian,&nbsp;Sim Jia Huey","doi":"10.1002/apj.2994","DOIUrl":"10.1002/apj.2994","url":null,"abstract":"<p>The biodiesel production catalyzed by naturally derived catalysts such as calcium oxide (CaO) and sulfonated carbon catalysts achieved high biodiesel yield at moderate operating conditions. However, very few studies were conducted to evaluate the economic feasibility of industrial-scale production of biodiesel catalyzed by both green catalysts of CaO and sulfonated carbon catalysts. The current study aims to assess the technical competency and economic feasibility of industrial-scale production of biodiesel catalyzed by two processes 1.) CaO catalyst and 2.) sulfonated carbon catalyst. Process simulations via Aspen Hysys were carried out to perform material and energy balances for both process configurations designed earlier with respect to the base catalyst (CaO) and acid catalyst (sulfonated carbon) used. Economic analysis was initiated after the equipment sizing and costing had been carried out. Total capital investment, total manufacturing cost, and key performances of the rate of return, payback time, breakeven point, and net profit after-tax rate were calculated for each process. Based on the economic analysis, the computed return on investment (ROI) is 105.36%, and it has a low payback period of 0.94 year to offset its original investment. The discounted cumulative profit (NPV) analysis shows that breakeven was achieved in the 3rd year. On the other hand, for the plant that utilizes sulfonated carbon in the transesterification reaction, the computed ROI is 14.02% with a payback period of 7.13 years, and the breakeven was achieved in the 9th year. In conclusion, the manufacturing plant of transesterification reaction catalyzed by CaO catalyst appeared as the most promising pathway either technically or economically.</p>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136212837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}