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Metal-organic framework(MOF)-derived catalysts for Fischer-Tropsch synthesis: Recent progress and future perspectives

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Journal of Energy Chemistry 2020年第12期29卷 230-245页

作者： Kabir opeyemi Otun Xinying Liu Diane Hildebrandt Institute for the Development of Energy fo r African Sustainability College of ScienceEngineering and TechnologyUniversity of South AfricaJohannesburgSouth Africa Department of Chemistry Kwara State UniversityPMB 1530llorinKwara StateNigeria International Joint Laboratory of New Energy Hebei University of Science and TechnologyShijiazhuang 050018HebeiChina

Fischer-Tropsch Synthesis(FTS) is an important catalytic chemical reaction that converts a mixture of CO and H2(syngas) derived from biomass, coal or natural gas into ultra-clean fuels or value-added chemicals. However, most traditional catalysts used in the Fischer-Tropsch process are faced with the problems of high deactivation rate triggered by sintering, phase changes and oxidation which hamper their catalytic performance. Metal-organic frameworks(MOFs)-derived materials have been a promising alternative in addressing the catalyst deactivation problems in FTS because of the encapsulation of their metal nanoparticles in carbon matrix and absence of large particle size, among other reasons. Therefore, this review emphasizes the most recent research headway in the investigation of MOFs as precursors to achieve high-performance FTS catalysts. Precisely, the design of iron and cobalt-based FTS catalysts from parent MOFs via MOF-mediated synthesis, the catalytic activity of the MOF-derived materials and the promoter effects under FTS operation were outlined and discussed. We have also evaluated the influence of MOF structures on the FTS performance and compared them with traditional/commercially available catalysts to show the importance of this approach. Finally, the challenges and opportunities to further expedite the extensive research efforts and promote their applications in material design and FT technology were mentioned.

关键词： Metal-organic frameworks Fischer-Tropsch synthesis Catalyst MOFMS Deactivation

Relaxed Inertial Method for Solving Split Monotone Variational Inclusion Problem with Multiple Output Sets Without Co-coerciveness and Lipschitz Continuity

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Acta Mathematica Sinica,English Series 2024年第7期40卷 1697-1726页

作者： Timilehin opeyemi Alakoya Oluwatosin Temitope Mewomo School of Mathematics Statistics and Computer ScienceUniversity of KwaZulu-NatalDurbanSouth Africa

In this paper,we study the concept of split monotone variational inclusion problem with multiple output *** propose a new relaxed inertial iterative method with self-adaptive step sizes for approximating the solution of the problem in the framework of Hilbert *** proposed algorithm does not require the co-coerciveness nor the Lipschitz continuity of the associated single-valued ***,some parameters are relaxed to accommodate a larger range of values for the step *** some mild conditions on the control parameters and without prior knowledge of the operator norms,we obtain strong convergence result for the proposed ***,we apply our result to study certain classes of optimization problems and we present several numerical experiments to demonstrate the implementability of the proposed *** of the existing results in the literature could be viewed as special cases of our result in this paper.

关键词： Split inverse problems non-Lipschitz operators inertial technique self-adaptive step sizes

Quality attributes of chicken nuggets extended with different legume flours

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Food Production, Processing and Nutrition 2022年第1期4卷 224-234页

作者： opeyemi Abiala Moses Abiala Babatunde Omojola Department of Animal Science Faculty of AgricultureUniversity of IbadanIbadanOyo StateNigeria Department of Biological Sciences College of Basic and Applied SciencesMountain Top UniversityPrayer CityOgun StateNigeria

Chicken nugget is a comminuted meat product commonly prepared from spiced chicken meat and other ingredients. The tenderness of chicken meat lowers its firmness and mouth feel which may reduce acceptability of chicken nugget made from it. Thus, acceptability of chicken nugget could be harnessed when legume flour extenders are used along. Therefore, acceptability as well as quality of chicken nugget from different legume flours were evaluated. Soyabean, groundnut and cowpea flours were used as meat extenders for development of raw chicken nuggets and thereafter cooked for consumption. The quality of both raw and cooked legume flour extended chicken nuggets were assessed based on functional properties, sensory properties, proximate composition, amino acid content and shelf stability in terms of lipid peroxidation and microbial load. In their raw state, the legume flour extenders competed favourably with each other. Among all, soyabean flour extender maintained remarkable functional properties that transcend into significant (P < 0.05) yield of 86.93% of chicken nugget in comparison to the control (86.37%), groundnut (84.95%) and cowpea (84.50%). Upon cooking, all the legume flour extended chicken nuggets varied in their quality attributes. Apart from the high level of flavour and low microbial load, cowpea extended chicken nugget was of low quality based on the parameters evaluated in comparison with other legume flour extended chicken nuggets. Of interest, soyabean extended chicken nugget followed by groundnut extended chicken nugget were of good quality based on sensory properties, high crude protein and amino acid levels, low cholesterol content and lipid peroxidation value as well as low microbial load.

关键词： Chicken nuggets Legume flour Proximate compositions Amino acids Soyabean Cowpea Groundnut

Cement-lime stabilization of crude oil contaminated kaolin clay

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Journal of Rock Mechanics and Geotechnical Engineering 2020年第1期12卷 160-167页

作者： opeyemi E.Oluwatuyi Oluwapelumi O.Ojuri Arman Khoshghalb Department of Civil Engineering Landmark UniversityOmu-AranNigeria Department of Civil and Environmental Engineering Federal University of TechnologyAkureNigeria School of Civil and Environmental Engineering University of New South Wales(UNSW)SydneyAustralia

The present study examines the effect of stabilization on the geo-environmental properties of crude oil contaminated kaolin *** and cement were mixed in a ratio of 1:2 and added to the simulated crude oil contaminated kaolin clay at different percentages(5%,10%,15%,and 20%)as a stabilizing *** investigated include consistency limits,unconfined compressive strength(UCS),and direct shear,and compressibility and leaching characteristics of the untreated and stabilized *** experimental testing reveals a decrease in the consistency limits with addition of the stabilizing *** UCS values occurred for 15%cement-lime stabilized kaolin clay at different curing periods(i.e.0 d,7 d,14 d,and 28 d).By increasing the cement-lime content from 5%to 15%,the UCS values of the stabilized clay increase from 185 kPa to 350 kPa and from 785 kPa to 1160 kPa for uncured and 28 dcured samples,*** the compression and recompression indices of the contaminated kaolin clay from the consolidation test decrease by 40%and 50%,respectively,with 20%stabilizing binder *** leachability of the contaminated clay also reduces with incorporation of cement and *** to the scanning electron microscope(SEM)test,addition of stabilizing binder transforms the dispersed structure of contaminated kaolin clay into a knitted flocculated *** study shows the effectiveness of cement-lime mix in stabilizing the contaminated kaolin clay and the possible use of stabilized contaminated kaolin clay as an alternative construction material.

关键词： Cement-lime Consolidation Contaminated clay Crude oil Stabilization

Estimation of Key Ion Contents in Cotton Leaf Using Different Spectroscopy Methods

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Estimation of Key Ion Contents in Cotton Leaf Using Differen...

作者： ATOBA TOLULOPE opeyemi 福建农林大学

学位级别：硕士

Width and Shape Measurement of Iron Slabs Using Machine Vision

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Width and Shape Measurement of Iron Slabs Using Machine Visi...

作者： Oloro Michael opeyemi 沈阳建筑大学

学位级别：硕士

The ability to accurately measure the strip and plate width,as well as detect the shape of strip slabs for the purpose of detecting lateral bending called camber,together with the head shape in the course of hot rolling process is essential for the production of high and desired quality steel,and also for achieving ace *** recent times,laser triangulation systems,light sensors,width gauge and many others have been used in hot strip mills to measure the width of iron ***,which is the measurement of the distance by estimating angle,is a laser mechanics that reflects lights that falls on the receiving object at a particular angle depending on the *** determines the position of the object by measuring the reflected light from the target *** this study,shape detection and width measurement of slabs using machine vision and image processing techniques is *** Laser triangulation method,the developed model is a non-contact *** purpose of this project is to determine the shape of the head or tail and the degree of lateral bending on the rolling *** plane CCD camera with the Gigabit interface is arranged before the rough rolling and *** images of the head and tail are collected in real time.A model was developed to remove the impulse noise by computing local similarity analysis and calculating the neighborhood noise evaluation *** noise is filtered out by combining the inverse of the gray difference together with the reciprocal of the geometric *** canny operator is used to extract the sub pixel edge based on detail classification of the head and tail shape on the basis of edge *** scan width center line,strip body width and scan line width to determine the plane shape and the optimized cutting *** the same time on the strip side,using the estimated width and shape to determine the curvature *** significance of the study is to reduce the cost of th

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#Take Responsibility:Non-Verbal Modes as Discursive Strategies in Managing Covid-19 Public Health Crisis

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Language and Semiotic Studies 2020年第4期6卷 1-24页

作者： Oluwabunmi opeyemi Oyebode Saheed Omotayo Okesola Obafemi Awolowo University Nigeria

This paper examines different modes of non-verbal communication deployed as discursive strategies/safety protocol measures during the Covid-19 crisis to warn people against contracting the disease and to contain its *** data,which consist of forty purposively selected images used by the Nigerian Centre for Disease Control and remodified logos of some international brands shared on the social media space—NCDC website,Facebook and Twitter,are divided into four broad categories and analysed qualitatively using Kress and van Leeuwen’s Social Semiotic framework to examine their representational *** non-verbal modes of communication are used as representations to create awareness about the pandemic,depict its manifestations(signs and symptoms)and educate people on the important guidelines to observe in order to prevent contracting the infectious ***,different semiotic resources are deployed as meaning-making processes to interrogate these thematic *** study concludes that the choice of the non-verbal modes/images are intentional and strategic as their specificity projects the intended meaning of the message,enhances wider reach and enables effective communication of proper management of the health crisis.

关键词： social semiotics non-verbal modes discursive strategies Covid-19 crisis

Contexts and pragmatic strategies of COVID-19 related cartoons in Nigeria

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Language and Semiotic Studies 2024年第2期10卷 267-289页

作者： Ezekiel opeyemi Olajimbiti Oluwafemi Bolanle Jolaoso Department of English and Literary Studies Federal University LokojaLokojaNigeria Department of English and Literary Studies Ladoke Akintola University of TechnologyOgbomosoNigeria

The global outbreak of the coronavirus pandemic has been experienced differently by people depending on their socio-cultural *** varied experiences are expressed in various forms of communication,including *** paper examines the pragmatic resources inherent in COVID-19-related cartoons depicting the impact of the virus on Nigerian *** COVID-19-related cartoons,circulated on social media,were collected on Twitter and WhatsApp platforms between March and April 2020 as *** and presupposition served as theoretical framework and descriptive research design was *** reveal five socio-contextual domains,religion,health,economy,politics and governance nd family,characterizing the social experiences of Nigerians during the *** the evocation of situational reality,pragmatic sarcasm,punning,and orientation to government insensitivity,the cartoonists evoke pragmatic functions of informing and warning about social behaviours in the religion,family and health domains;recreating situational realities on socioeconomic impacts in the domain of economy;and satirizing government policies and mocking politicians’insincerity in the domain of politics and governance on sociopolitical experiences of Nigerians before and during the *** study concludes cartoons are a strong means of portraying societal realities and people’s experiences comically and graphically.

关键词： multimodality COVID-19-related cartoons sociocultural experience shared situational knowledge context

"The soro-soke[speak up]generation":multimodality and appraisal choices in selected#EndSars civil protest-related memes in Nigeria

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Language and Semiotic Studies 2023年第2期9卷 290-312页

作者： Saheed Omotayo Okesola Oluwabunmi opeyemi Oyebode Department of English Obafemi Awolowo UniversityIle-IfeNigeria

This paper explores the deployment of multimodal elements as appraisal resources in#Endsars civil unrest-related memes in Nigerian social media space(WhatsApp and Twitter)to express affective meanings and intersubjective *** study investigates how both verbal and non-verbal elements are deployed as appraisal resources to evaluate the trajectory of the *** data,which comprise thirty purposively selected Internet memes,collected between October and December,2020,were analysed *** study shows that the meme producers,through the use of multimodal concepts such as symbolic,analytical,action,reactional processes,offer and salience,among others,project various expressions of affect,judgement and appreciation of things to create important narratives in the ***,the verbal elements are graded/upscaled through the non-verbal elements in the memes to evoke specific reactions,positive/negative,which signal intersubjective positioning about the protest and relevant social *** study concludes that meme producers effectively utilize multimodal elements to interrogate various expressions of attitude and inter-subjective opinions that Nigerians made about the protest and its management by the Nigerian government.

关键词： EndSars evaluation multimodality Soro soke[speak up] Twitter WhatsApp