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CO_(2)utilization in syngas conversion to dimethyl ether and aromatics:Roles and challenges of zeolites-based catalysts

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Journal of Energy Chemistry 2023年第4期79卷 418-449页

作者： Ali A.Al-Qadri Galal A.Nasser haruna adamu Oki Muraza Tawfik A.Saleh Department of Chemical Engineering King Fahd University of Petroleum and MineralsDhahran 31261Saudi Arabia Interdisciplinary Research Center for Hydrogen and Energy Storage(IRC-HES) King Fahd University of Petroleum&MineralsDhahran 31261Saudi Arabia Department of Environmental Management Technology and Department of ChemistryAbubakar Tafawa Balewa UniversityBauchiNigeria Department of Chemistry King Fahd University of Petroleum and MineralsDhahran 31261Saudi Arabia

Several studies have proven a strong correlation between global warming and CO_(2)***,38 billion tons of CO_(2)are approximately emitted into the *** CO_(2)via chemical conversion to clean fuels and value-added aromatics can substantially contribute to controlling the *** the thermodynamic and environmental limitations of hydrogenation of CO_(2)alone to value-added aromatics and fuels,CO_(2)utilization has currently emerged as a promising and practical approach for the production of fuels and aromatics with simultaneous utilization of both CO and CO_(2)*** such,the approach is economically ***_(2)could be converted directly to fuels by the hydrogenation process or as a part of a syngas *** ether(DME)is a clean fuel with a higher energy density,which could be used as a substituent for several fuels such as *** the same vein,value-added aromatics such as benzene,toluene,and xylene(BTX)can be produced from a similar ***,we report a review that collects the most recent studies for the conversion of CO_(2)to DME and aromatics via zeolite-based bifunctional *** highlighted the main routes for producing DME and aromatics,as well as thoroughly discussed the conducted studies on CO_(2)hydrogenation and CO_(2)-rich syngas utilized as feedstock for conversion to DME and *** CO_(2)hydrogenation mostly occurs through the methanol-mediated reaction route but is most often limited by low selectivity and catalyst deactivation,particularly in the utilization of CO_(2)alone for the reduction *** review takes an overview of the progress made so far and concluded by identifying the roles and challenges of zeolite-based catalysts for CO_(2)utilization and conversion to DME and ***,despite the incredible growth the field received in the last couple of years,however,many research challenges and opportunities associated with this process are still abou

关键词： Clean fuel DME Aromatics Bifunctional catalyst CO_(2)mitigation

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微型反应器中半焦催化焦油重整反应的特性和动力学

微型反应器中半焦催化焦油重整反应的特性和动力学

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作者： Mohammed haruna adamu 中国科学院大学(中国科学院过程工程研究所)

学位级别：硕士

气化技术是含碳燃料清洁、高效转化的主要途径。煤焦油是中低温气化技术不可避免的液体副产物。低温下,焦油凝结,易堵塞管路、腐蚀设备、引起催化剂中毒、并产生大量含酚废水,影响设备的正常运行,且降低气化效率。研究表明,半焦能有效... 详细信息

气化技术是含碳燃料清洁、高效转化的主要途径。煤焦油是中低温气化技术不可避免的液体副产物。低温下,焦油凝结,易堵塞管路、腐蚀设备、引起催化剂中毒、并产生大量含酚废水,影响设备的正常运行,且降低气化效率。研究表明,半焦能有效地脱除焦油,且具有来源广、成本低、失活后可继续用于气化等优势。然而,现有的相关研究大多集中在半焦脱除焦油的可行性论证和焦油脱除效率的改进上,而对半焦脱除焦油的机理和动力学研究较少,制约着该技术的发展,亟待研究。基于此,本研究利用热重(TGA)和微型流化床反应分析仪(micro fluidized bed reaction analyzer)考察多孔煤焦对煤焦油的等温和非等温催化脱除作用,与煤焦油的热裂解作用相比,证明半焦催化脱除的优势,揭示半焦中金属氧化物对焦油脱除的贡献,利用绝对转化率方法求算半焦催化脱除焦油过程中气体生成的动力学数据。具体如下:首先,利用热重分析仪考察了非等温条件下(50-1000℃)煤焦油热裂解过程和催化重整过程的质量演变规律,对比在上述过程中焦油的热化学反应行为,计算基于焦油质量变化的反应动力学,两者的反应活化能分别为27.38和18.47 kJ/mol,证明半焦对焦油的催化重整作用。其次,利用新开发的微型流化床反应分析仪考察等温条件下,焦油热裂解和焦油催化重整的反应行为。为模拟多孔半焦中金属氧化物的催化效果,制备无灰分半焦和负载单一金属氧化物的半焦催化剂,考察其催化效果,并与热裂解和含灰半焦进行比较。并基于对气体产物的分析(H2,CO,CO2和CH4),进行动力学计算,揭示金属氧化物的贡献及半焦序列依次为:CaO>K2O>Fe2O3>Na2O>MgO。基于此,提出半焦催化焦油的均相和非均相反应机制。

关键词：气化焦油热裂解催化重整微型流化床

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Evaluation of Carbon Sequestration Potential of Soils―What Is Missing?

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Journal of Geoscience and Environment Protection 2021年第8期9卷 39-47页

作者： haruna adamu Yuguda Abubakar Umar Hannatu Akanang Ahmed Sabo Department of Environmental Management Technology Abubakar Tafawa Balewa University Bauchi Nigeria Department of Chemistry Abubakar Tafawa Balewa University Bauchi Nigeria

It is no doubt that soils are among the Earth’s largest terrestrial reservoirs of carbon pool and hold potential for its sequestration and thus, soils can serve as potential way of mitigating the ever-increasing atmospheric CO2 concentration. However, the stability and flux of soil organic carbon are affected in response to changes that are being driven by forms of environmental and anthropogenic factors. Therefore, to establish carbon sequestration potential of soils, an in-depth scientific evaluation that would provide mapping of and speciation of carbon chemical forms, as well as factors influencing the persistence of carbon in soils are key to the process which are beyond quantitative measurements that are conventionally implemented under different land use and/or soil management. This involves soil chemistry, physics, biology, and microbiology. Hence, this short review communication highlights portions of soil chemistry and physics as well as soil biology and microbiology that have not been given attention in determining and/or underpinning decisions on carbon sequestration potential of soils.

关键词： Soil Carbon Sequestration Potential Climate Change Mitigation

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A critical review of diagnostic and prognostic markers of chronic hepatitis B infection

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Medical Review 2024年第3期4卷 225-234页

作者： Shuaibu Abdullahi Hudu Sa’adatu haruna Shinkafi Abdulgafar Olayiwola Jimoh Department of Basic Medical and Dental Sciences Faculty of DentistryZarqa UniversityZarqa 13110Jordan Department of Microbiology and Parasitology Usmanu Danfodiyo University Teaching HospitalSokotoSokoto StateNigeria Department of Pharmacology and Therapeutics Faculty of Basic Clinical SciencesCollege of Health SciencesUsmanu Danfodiyo UniversitySokoto840232 Sokoto StateNigeria

A major worldwide health concern,chronic hepatitis B necessitates precise prognostic and diagnostic indicators for clinical *** article highlights the clinical importance and current issues of the major markers used in both the detection and prognosis of chronic hepatitis *** important indicator of an ongoing and persistent infection is the hepatitis B surface *** B virus DNA quantification monitoring aids in assessing viral load and hepatic cancer *** limited evidence of liver damage is provided by alanine aminotransferase levels,the hepatitis B core antibody verifies acute ***version to the hepatitis B e antibody is linked to a lower risk of disease development,and the hepatitis B e antigen status is a critical prognostic *** choices are guided by a biopsy of the liver or minimally invasive liver fibrosis *** of the hepatitis B virus and host variables influence the prognosis by adding to the disease’s *** techniques to evaluate the severity of the disease are provided by serum markers of fibrosis,such as the fibrosis score based on four criteria and the aspartate aminotransferase-to-platelet ratio *** requirement for indicators that distinguish between distinct viral phases and increase specificity in evaluating liver damage is one of the challenges facing chronic hepatitis B *** though it is quite difficult to find reliable biomarkers for resistance especially when it comes to hepatocellular cancer risk estimation,there are advanced methods,which include imaging and omics that can help in improving the accuracy of the diagnostics and *** early point that improve patient outcomes are made possible using diagnostics and prognostics as they are quite effective in managing the complicated landscape of chronic hepatitis *** in addressing these challenges today and improving the diagnostic and prognostic markers in the future,particula

关键词： chronic hepatitis prognostic scores seromarkers surrogate markers

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Gut pathobiome mediates behavioral and developmental disorders in biotoxin-exposed amphibians

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Environmental Science and Ecotechnology 2024年第5期21卷 208-218页

作者： Qianqian Pan Tianxing Lv Haorong Xu Hongda Fang Meng Li Jiaping Zhu Yue Wang Xiaoyan Fan Ping Xu Xiuguo Wang Qiangwei Wang haruna Matsumoto Mengcen Wang Ministry of Agricultural and Rural Affairs Laboratory of Molecular Biology of Crop Pathogens and Insects Zhejiang UniversityHangzhou310058China Institute of Pesticide and Environmental Toxicology College of Agriculture and BiotechnologyZhejiang UniversityHangzhou310058China Institution of Tea Science Zhejiang UniversityHangzhou310058China The Tobacco Research Institute Chinese Academy of Agricultural SciencesQingdao266101China Global Education Program for AgriScience Frontiers Graduate School of AgricultureHokkaido UniversitySapporoJapan

Emerging evidence suggests a link between alterations in the gut microbiome and adverse health outcomes in the hosts exposed to environmental ***,the causal relationships and underlying mechanisms remain largely *** we show that exposure to biotoxins can affect gut pathobiome assembly in amphibians,which in turn triggers the toxicity of exogenous *** used Xenopus laevis as a model in this *** exposed to tropolone demonstrated notable developmental impairments and increased locomotor activity,with a reduction in total length by 4.37%e22.48%and an increase in swimming speed by 49.96%e84.83%.Fusobacterium and Cetobacterium are predominant taxa in the gut pathobiome of tropolone-exposed *** tropolone-induced developmental and behavioral disorders in the host were mediated by assembly of the gut pathobiome,leading to transcriptome *** study not only advances our understanding of the intricate interactions between environmental pollutants,the gut pathobiome,and host health but also emphasizes the potential of the gut pathobiome in mediating the toxicological effects of environmental contaminants.

关键词： Gut microbiome Pathobiome Biotoxin pollution Developmental toxicity Behavioral disorders

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Knowledge of Hospital Acquired Infections (HAIs) among Medical Students in a Tertiary Hospital in Jos North Local Government Area, Plateau State, Nigeria

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Advances in Infectious Diseases 2024年第1期14卷 162-175页

作者： Prosper Iheanacho Okonkwo Kingsley Chinedu Okafor Bitrus Salome Kwaghal Bolarinwa Boluwatito Joel haruna Garba Department of Community Medicine & PHC Bingham University Karu Nigeria

Background: Hospital Acquired Infections (HAIs) remain a common cause of death, functional disability, emotional suffering and economic burden among hospitalized patients. Knowledge of HAIs is important in its prevention and control. This study seeks to assess the knowledge of Hospital Acquired Infections (HAIs) among medical students in a Tertiary Hospital in Jos North Local Government Area, Plateau State, Nigeria. Methods: This was a descriptive cross-sectional study done in October 2019 among clinical medical students using a Multistage sampling technique. Data was collected using a self-administered structured questionnaire and analyzed using the IBM SPSS 20 (Statistical Package for the Social Sciences). Ethical approval was granted by Bingham University Teaching Hospital, Ethics Committee, Jos, Plateau State. Results: A total of 219 students in the clinical arm of the College of Medicine and Health Sciences were selected. A higher proportion (97.7%) of respondents knew about Hospital Acquired Infections and 85.4% knew that Hospital Acquired infections occur in the hospital, and (86.3%) considered patients contagious with half (58.9%) considered patients as the most important source of HAIs, followed by care givers (13.2%), then doctors including medical students and interns (10.0%) and lastly nurses (8.7%). The majority of respondents (70.8%) considered Surgical Wound Infections to be the most commonly occurring HAI, followed by UTIs (69.9%), RTIs (61.2%), BSIs (37.0%) and others (0.9%). The clinical thermometer was the instrument that most commonly transmits HAIs (82.6%), then followed by stethoscope (62.1%), white coats (53.9%), and blood pressure cuff (51.1%). Most respondents knew the infectious substances, like blood (96.3%), nasal discharge (82.6%), saliva (85.3%), and faeces (79.4%) transmitted HAIs, 72.6% of the respondents said that they were aware of the recommended hand washing techniques by WHO. Conclusion: The majority of students 91.3% had good kn

关键词： Knowledge Hospital Acquired Infections (HAIs) Nosocomial Infections Medical Students

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Fournier’s Gangrene: A Review of Fournier’s Gangrene Severity Index (FGSI) and Other Predictors of Mortality

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Open Journal of Urology 2024年第7期14卷 391-399页

作者： Makama Baje Salihu haruna Liman Stephen Yusuf Aminu Umar Abraham Tunde Oladimeji Aremu Abdulrazak Urology Unit Department of Surgery Abubakar Tafawa Balewa University Teaching Hospital Bauchi Nigeria

Background: Fournier gangrene is an acute and rapidly progressive necrotizing fasciitis of the scrotum, perianal and perineal region of the body. It is a polymicrobial infection having an interplay of both anaerobic and aerobic orgasms in a soup of microbial disaster. Fournier’s gangrene was also initially thought to be an idiopathic condition but a lot of risk factors have been associated now with this condition, both systemic risk factors and local. Systemic risk factors include diabetes mellitus, HIV/AIDS, cancers, chronic liver disease, chronic steroid use etc. The local risk factors include perineal injuries, watering can perineum, perianal abscess, chronic perineal itching etc. Purpose: The swiftly flourishing bacteria orgasms cause a similar disruptive event in the body of the patients both clinically and biochemically and these can be used to create a predictive score or index for patients in order to assess the disease severity and guide in the management and prognostication of this condition. Materials and Method: Urology ward record books, clinic record books and operating theater records were used to identify patients managed for Fournier gangrene in ATBUTH Bauchi. A retrospective study of the medical files of all the patients managed from January 2011 to January 2024 was done. Folders were retrieved and the medical records were reviewed. Results: Of the 50 patients reviewed, Male to female ratio is 24:1. The mean age is 56 years (2 weeks to 97 years). Mortality rate was 34%. There is a significant difference between delayed presentation/initial use of unorthodox treatment with mortality (p = 0.002). Of the 17 patients that died, 15 had FGSI > 9 and of the 33 patients that survived 29 had FGSI 9 is 88.2% while the mortality rate for those with FGSI Conclusion: knowledge of the predictors of its mortality is necessary in other to help stratify patients and ensure the best response by the caregivers. FGSI, delayed presentation/initial patronage of unorthod

关键词： Fournier’s Gangrene FGSI Risk Factors Mortality

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Fournier’s Gangrene: 13-Year Experience in a Tertiary Center, North Eastern Nigeria

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Open Journal of Urology 2024年第7期14卷 407-414页

作者： Makama Baje Salihu haruna Liman Stephen Yusuf Aminu Umar Oladimeji Abraham Tunde Ayodele Olufikayo Oshagbemi Amur Ibrahim Urology Unit Department of Surgery Abubakar Tafawa Balewa University Teaching Hospital Bauchi Nigeria

Background: Fournier’s gangrene is a fulminant infection of the genitourinary tract characterized by progressive necrosis of the skin and subcutaneous tissue of the external genitalia. Initially mainly seen involving the scrotum of elderly men with different moods of occurrence each unpleasantly lethal. With varying types of presentation only one thing has remained constant;the poor prognosis of this condition. Purpose/Aim: Thus, it’s important to study the trends of the presentation of this condition laying emphasis on the challenges in the management of these patients;both the negative and positive prognostic factors. Materials and Methods: Urology ward record books, clinic record books and operating theater records were used to identify patients managed for Fournier gangrene in ATBUTH Bauchi. A retrospective study of the medical files of all the patients managed from January 2011 to January 2024 was done. Data was analyzed using SPSS version 29. Results: Data from 47 patients seen during the period of study were carefully collected and analyzed. The age range is 2 weeks to 97 years. There were two neonates, one at 2nd week of life and the other at 3rd week. Mortality rate is 36%. The average time duration before presentation for patients that died was two weeks, a minimum of 9 days prior to presentation and a maximum of 21 days, about 10 of which came in septic shock and the remaining presented with fever and very extensive necrotizing fasciitis of the perineum. All the patients that died had diabetes mellitus as a comorbidity except the neonate. All the patients that survived were much younger, all were below 60 years of age (2 weeks - 53 years). Conclusion: Here, we share our experience managing patients with Fournier’s gangrene in our facility in the past 13-year period from January 2011 to January 2024. .

关键词： Fournier’s Gangrene Prognosis Elderly Presentation Treatment

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Small Cell Prostate Cancer;Center Review of Two Cases and Testimony of a Rare and Aggressive Disease

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Case Reports in Clinical Medicine 2024年第9期13卷 410-417页

作者： Makama Baje Salihu haruna Liman Stephen Yusuf Dauda Suleiman Shaphat Shuaibu Ibrahim Yusuf Aliyu Salihu Isa Sajo Mienda Department of Urology ATBUTH Bauchi Bauchi State Nigeria Department of Orthopaedics ATBUTH Bauchi Bauchi State Nigeria Department of Histopathology ATBUTH Bauchi Bauchi State Nigeria Department of Radiology ATBUTH Bauchi Bauchi State Nigeria

Small cell cancers were initially described in the lungs and later found to occur in a wide range of organs of the body, constituted a disease entity that is characterized by an aggrieve path/course and a huge disease related mortality. They are also called neuroendocrine tumors with peculiar histologic and biologic disease entity. Here we present two cases of small cell cancer of the prostate seen and managed in our facility with focus on their presentation, disease progression and outcome. The first patient was a 72-year-old retired military officer who presented with a progressively painful scrotal swelling of 3-month duration, and scrotal ulceration with contact bleeding of a month duration associated with a foul-smelling discharge. There was also history of progressive weight lost, loss of appetite and constipation. Patient was pale and lethargic on examination with a foul smelling exophytic scrotal mass. Serum PSA was 4 ng/l (within normal limit). Wedge biopsy and trucut prostate biopsy revealed small cell cancer of the prostate. Patient was resuscitated and prepared for chemoradiation, had a single dose of chemotherapy and died before the second dose. Second patient was a 63-year-old farmer who presented with lower urinary tract symptoms, progressive weight loss and constipation of two months duration, a known hypertensive and diabetic who has been regular on his medication. He was lethargic on examination, pale and unable to stand without support. Trucut prostate biopsy shows small cell cancer of the prostate. He was also resuscitated and being prepared for chemoradiation but died before commencement of treatment.

关键词： Small Cell Prostate Cancer Mortality Chemoradiation

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Air Quality Assessment of Ubeji Community near Petroleum-Related Activities

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Open Journal of Air Pollution 2024年第2期13卷 57-71页

作者： Adedoyin Olubunmi Bankole Akinyemi Olufemi Ogunkeyede Oluwafunmilayo Mary haruna Harrison Agboro Prince Alex Ekhorutomwen Osasenaga Israel Otuomagie Christabel Ifuwe Efe Jeffery Isukuru Department of Environmental Management and Toxicology College of Science Federal University of Petroleum Resources Effurun Delta State Nigeria Department of Biology and Environmental Science College of Arts and Sciences University of New Haven West Haven USA Department of Surveying and Geoinformatics Faculty of Environmental Science Dennis Osadebay University Asaba Asaba Nigeria

The escalating global concern over air pollution requires rigorous investigations. This study assesses air quality near residential areas affected by petroleum-related activities in Ubeji Community, utilizing Aeroqual handheld mobile multi-gas monitors and air quality multi-meters. Air sampling occurred on three distinct days using multi-gas monitors and meters, covering parameters such as CO, NO2, CH4, NH3, VOCs, Particulate Matter, Temperature, Relative Humidity, and Air Quality Index. Soil and plant samples were collected and analyzed for physicochemical and organic components. Air pollutant concentrations showed significant fluctuations. Carbon monoxide (CO) ranged from 0.00 to 3.22 ppm, NO2 from 0.00 to 0.10 ppm, CH4 from 4.00 to 2083 ppm, NH3 from 371 to 5086 ppm, and VOCs from 414 to 6135 ppm. Soil analysis revealed low total nitrogen, and undetected BTEX levels. Plant samples displayed a pH range of 7.72 to 9.45. CO concentrations, although below WHO limits, indicated potential vehicular and industrial influences. Fluctuations in NO2 and CH4 were linked to traffic, industrial activities, and gas flaring. NH3 levels suggested diverse pollution sources. The result in this study highlights the dynamic nature of air pollution in Ubeji community, emphasizing the urgent need for effective pollution control measures. Although CO concentrations were within limits, continuous monitoring is essential. Elevated NO2 levels gave information on the impact of industrial activities, while high CH4 concentrations may be associated with gas flaring and illegal refining. The study recommends comprehensive measures and collaborative efforts to address these complex issues, safeguarding both the environment and public health. This study shows the potential synergy between air quality sensors and plants for holistic environmental health assessments, offering valuable insights for environmental assessments and remediation endeavours. The findings call for stringent regulations and

关键词： Air Quality Assessment Bioindicators Ubeji Community Pollution Assessment

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