104,084 research outputs found
Modelling of H₂ production in a packed bed reactor via sorption enhanced steam methane reforming process
No full textThe sorption enhanced steam reforming (SE-SMR) of methane over the surface of 18 wt. % Ni/ Al₂O₃ catalyst and using CaO as a CO₂-sorbent is simulated for an adiabatic packed bed reactor. The developed model accounts for all the aspects of mass and energy transfer, in both gas and solid phase along the axial direction of the reactor. The process was studied under temperature and pressure conditions used in industrial SMR operations. The simulation results were compared with equilibrium calculations and modelling data from literature. A good agreement was obtained in terms of CH₄ conversion, hydrogen yield (wt. % of CH₄ feed), purity of H₂ and CO₂ capture under the different operation conditions such as temperature, pressure, steam to carbon ratio (S/C) and gas mass flux. A pressure of 30 bar, 923 K and S/C of 3 can result in CH₄ conversion and H₂ purity up to 65% and 85% respectively compared to 24% and 49% in the conventional process
The propaganda Techniques Use By Mahmud Kashgari
No full textÇalısmada, yazılıs amacı Araplara Türk dilini öğretmek olan Divanü Lûgati’t-Türk farklı bir bakıs açısı ile ele alınmaktadır. Eser filolojik öneminin dısında modern dil eğitim-öğretimi ve iletisim teknikleri bakımından da büyük değer tasımaktadır. Kâsgarlı Mahmud’un yabancılara Türkçenin öğretimi hedeflerini gerçeklestirirken iletisim tekniklerini basarıyla kullanması dikkati çekmektedir. Bu bağlamda, Kâsgarlı Mahmud’un eserinin girisinde Türkçeyi öğrenecek olan yabancı hedef kitleyi ikna etmek için ustalıkla basvurduğu temel propaganda teknikleri üzerinde durulmaktadır. Divanü Lûgati’t-Türk’ün girisinde Kâsgarlı Mahmud’un, plain folk truth (halk diliyle ifade), parlak sözler, transfer tekniği, bandwagon tekniği, kesinliği olmayan ifadeler olmak üzere temel propaganda tekniklerinden bes tanesini kullandığı belirlenmistir. Divanü Lûgati’t-Türk’te kullanılan bu teknikler, örnekleriyle ve basvurma gerekçeleriyle birlikte değerlendirilmektedir.This study investigates Divanü Lûgati’t-Türk from a distinct perspective. The primary aim of the book was to teach Turkish language to Arabians. Along with its philological importance, the book shows some distinctive features in respects of communication techniques and contemporary methods of the language teaching. The author, Mahmud of Kashgar uses interpersonal communication techniques very succesfully while aiming to teach Turkish language to the non-Turkish people. This study particularly examines the propaganda techniques that Mahmud of Kashgar uses in the introduction of his book to persuade his readers who are to learn Turkish. It was found out that the author used five different propaganda techniques ar the introduction of Divanü Lûgati’t-Türk, which are: plain folk truth, brilliant words, transferring technique, bandwagon technique and indefinite expressions. These techniques used in Divanü Lûgati’t-Türk are evaluated with their examples and application grounds
Modelling of high purity H2 production via sorption enhanced chemical looping steam reforming of methane in a packed bed reactor
No full textSorption enhanced chemical looping steam reforming of methane (SE-CLSR) relies on the exothermicity of both a metal catalyst’s oxidation and the in situ CO2 capture by carbonation onto a solid sorbent to provide the heat demand of hydrogen (H2) production by steam reforming while generating a nearly pure H2 product. A brief thermodynamic analysis to study the main features of the SE-CLSR process is done prior to the reactor modelling work. Later, one dimensional mathematical model of SE-CLSR process in the packed bed configuration is developed using gPROMS model builder 4.1.0® under the adiabatic conditions. This model combines reduction of the NiO catalyst with the steam reforming reactions, followed by the oxidation of the Ni-based reduced catalyst. The individual models of NiO reduction, steam reforming with in situ CO2 capture on Ca-sorbent, and Ni re-oxidation are developed by using kinetic data available in literature and validated against previous published work. The model of SE-CLSR is then applied to simulate 10 alternative cycles of the fuel and air feed in the reactor. The performance of the model is studied in terms of CH4 conversion, CO2 capture efficiency, purity and yield of H2. The sensitivity of the process is studied under the various operating conditions of temperature, pressure, molar steam to carbon ratio (S/C) and mass flux of the gas phase. In this work, the operating conditions used for the production of H2 represent realistic industrial production conditions.The sensitivity analysis demonstrates that the developed model of SE-CLSR process has the flexibility to simulate a wide range of operating conditions of temperature, pressure, S/C and mass flux of the gas phase
Norris (Harry T.) Sûfi Mystics of the Niger Desert. Sidi Mahmud and the Hermits of Aïr
No full textTriaud Jean-Louis. Norris (Harry T.) Sûfi Mystics of the Niger Desert. Sidi Mahmud and the Hermits of Aïr. In: Archives de sciences sociales des religions, n°80, 1992. pp. 282-284
Modelling of H2 production via sorption enhanced steam methane reforming at reduced pressures for small scale applications
No full textThe production of H2 via sorption enhanced steam reforming (SE-SMR) of CH4 using 18 wt. % Ni/ Al2O3 catalyst and CaO as a CO2-sorbent was simulated for an adiabatic packed bed reactor at the reduced pressures typical of small and medium scale gas producers and H2 end users. To investigate the behaviour of reactor model along the axial direction, the mass, energy and momentum balance equations were incorporated in the gPROMS modelbuilder®. The effect of operating conditions such as temperature, pressure, steam to carbon ration (S/C) and gas mass flow velocity (Gs) was studied under the low-pressure conditions (2 – 7 bar). Independent equilibrium based software, chemical equilibrium with application (CEA), was used to compare the simulation results with the equilibrium data. A good agreement was obtained in terms of CH4 conversion, H2 yield (wt. % of CH4 feed), purity of H2 and CO2 capture for the lowest (Gs) representing conditions close to equilibrium under a range of operating temperatures pressures, feed steam to carbon ratio. At Gs of 3.5 kg m-2s-1, 3 bar, 923 K and S/C of 3, CH4 conversion and H2 purity were up to 89% and 86% respectively compared to 44% and 63% in the conventional reforming process
PERANCANGAN KOMUNIKASI VISUAL BUKU LAGU POP-UP AT MAHMUD "HARI YANG INDAH"
No full textPERANCANGAN KOMUNIKASI VISUAL BUKU LAGU POP-UP AT MAHMUD "HARI YANG INDAH" - Lagu, Menyanyi, A. T. Mahmud, Ceria, Interakti
HUBUNGAN ORIENTASI MASA DEPAN DENGAN KECEMASAN MENGHADAPI DUNIA KERJA PADA MAHASISWA TINGKAT AKHIR
No full textMahasiswa kebanyakan sering mengalami kecemasan, terkhususnya kecemasan menghadapi dunia kerja, hal ini dikarenakan kurangnya persiapan diri dari mahasiswa, sehingga diperlukannya orientasi masa depan yang jelas. Populasi pada penelitian ini merupakan mahasiswa tingkat akhir di Universitas Islam Mahmud Yunus Batusangkar. Teknik sampel dalam penelitian ini menggunakan teknik simple random sampling. Sampel terdiri dari 50 mahasiswa tingkat akhir dari berbagai Fakultas di Universitas Islam Negeri Mahmud Yunus Batusangkar. Analisis data yang digunakan dalam penelitian ini adalah Product Moment Pearson. Penelitian ini menemukan bahwa terdapat hubungan yang sangat signifikan antara orientasi masa depan dengan kecemasan menghadapi dunia kerja, dikarenakan nilai t = -0,736; p < 0,01. Penelitian ini menunjukkan bahwa mahasiswa yang memiliki orientasi masa depan yang jelas dapat menjadi salah satu cara untuk mengatasi kecemasan menghadapi dunia kerja
Letter, [Author unclear] to Paulina T. Merritt
No full textHandwritten letter to Paulina Merritt from an unknown author, October 1, 1876.
Kinetics study and modelling of steam methane reforming process over a NiO/Al2O3 catalyst in an adiabatic packed bed reactor
No full textKinetic rate data for steam methane reforming (SMR) coupled with water gas shift (WGS) over an 18 wt. % NiO/α-Al2O3 catalyst are presented in the temperature range of 300-700 °C at 1 bar. The experiments were performed in a plug flow reactor under the conditions of diffusion limitations and away from the equilibrium conditions. The kinetic model was implemented in a one-dimensional heterogeneous mathematical model of catalytic packed bed reactor, developed on gPROMS model builder 4.1.0®. The mathematical model of SMR process was simulated, and the model was validated by comparing the results with the experimental values. The simulation results were in excellent agreement with the experimental results. The effect of various operating parameters such as temperature, pressure and steam to carbon ratio on fuel and water conversion (%), H2 yield (wt. % of CH4) and H2 purity was modelled and compared with the equilibrium values
Analisis Nilai Karakter dalam Lagu Anak Karya A.T. Mahmud
No full textSeiring dengan perkembangan dunia yang begitu cepat, Perkembangan ilmu pengetahuan dan teknologi telah memberikan perubahan signifikan terhadap seluruh aspek kehidupan manusia, di antaranya pada bidang pendidikan. Perkembangan ilmu pengetahuan dan teknologi terutama pada bidang pendidikan telah melupakan pendidikan karakter. Hal ini dibuktikan dengan banyaknya kasus kriminal, asisula dan kekerasan yang dilakukan di dalam dunia pendidikan. Salah satu pembentukan karakter pada anak akan dapat terakomodasi melalui pendidikan musik. A. T. Mahmud merupakan salah satu dari sekian pencipta lagu anak – anak pada saat itu.. Penelitian ini bertujuan untuk mendeskripsikan dan menganalisis nilai karakter dalam lagu anak karya A. T. Mahmud. Teknik pengumpulan data yang digunakan yaitu observasi, wawancara, dan dokumtasi. nilai karakter yang terdapat dalam lagu anak karya A.T Mahmud diantaranya: nilai religius, rasa ingin tahu, menghargai prestasi, kerja keras, jujur, disiplin, komunikatif, kreatif. Nilai karakter yang paling banyak yaitu menghargai prestasi terdapat dalam 3 lagu.Kata Kunci: karakter, lagu anak, A.T. Mahmu
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