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Next Generation Mixed Matrix Membranes for Co2 Separations Aimed at Energy & Environmental Issues

Thesis Info

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Author

Tahir, Zaman

Program

PhD

Institute

COMSATS University Islamabad

City

Islamabad

Province

Islamabad.

Country

Pakistan

Thesis Completing Year

2019

Thesis Completion Status

Completed

Subject

Chemical Engineering

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/9690/1/Zaman_Tahir_2018_COMSATS.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676726754898

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Next Generation Mixed Matrix Membranes for CO2 Separations aimed at Energy & Environmental Issues The gas separation process is mainly governed by membrane technology in different industries. Currently, gas separations acquire a membrane market of over four hundred million dollars per year which comprise 24% of the overall membrane market. The components of feed mixture can be efficiently separated via membranes, which exhibit promising potential, based on size, shape and physiochemical properties of the components. Generally, inorganic membranes (e.g. alumina, zeolite, carbon etc.) exhibit high separation efficiency and can withstand under high thermal and chemical exposure than polymeric membranes. However, their commercial application is limited due to some disadvantages such as their brittleness, difficult processing and high cost. In past decades, polymeric membranes have attracted the attention of researchers due to their promising intrinsic advantages of efficient removal of unwanted gases from feed stream economically. Gas separation membranes are efficiently used for natural gas treatment, hydrogen recovery, and oxygen and nitrogen recovery from air. The aim of this research work was to fabricate promising mixed matrix membranes with superior CO2 selectivities and high permeabilities at high temperatures and pressures. In chapter 2 of this thesis, MMMs were synthesized comprising of F-SPEEK polymer and zeolite 4A as filler. Gas separation studies for both pure and mixed gases were examined and results revealed the considerable increase in permeability and selectivity at higher filler loadings. Moreover, the combined effect of sulfonic and fluorine groups in the polymer matrix significantly improved molecular sieving effect, fixed pores and high free volume which resulted in enhanced gas separation performance. The increasing permselectivity of F-SPEEK/4A MMMs proved to be an effective material for CO2 sequestration. Chapter 3 deals with Bio-MOF-11 based PSf MMMs for CO2 separation. BioMOFs are the sub-class of MOFs which have Lewis basic sites in their structures. BioMOF-11 consists of nitrogenous base adenine with five nitrogen in the ring which has a strong affinity towards CO2 gas molecules. The gas separation results showed outstanding. CO2 permeabilities (upto 210%) and selectivities (upto 100%) at higher MOF loadings as compared to pure polymer. These performances were attributed to the cobalt-adeninateacetate paddle wheel clusters. Chapter 4 focusses on the investigation of highly stable zirconium based MOF UiO66. MOF particles first functionalized with the sulfonic group which was grafted by the silane coupling agent MPTMS. Sulfonic group imparted high separation properties to the UiO-66 MOF. PSf was used as a polymer matrix and MMMs were synthesized of nonfunctionalized and functionalized UiO-66 and their results were compared. The ideal and mixed gas performance of the synthesized MMMs was investigated by DSC, SEM and results from density and FFV measurements that proved good MOF‐polymer adhesion. Moreover, the MMMs exhibited high CO2 permeabilities and selectivities and proved this material promising for the CO2 separation. PIM-1 and Cu-MOF based MMMs were studied in chapter 5 of this thesis. PIM-1 is well-known for its high rigid backbone structure, interconnected voids and high free volume, high permeabilities ranging from several hundred to thousands (3000-8000 barrer) and comparable selectivities. Cu-MOF consists of a paddle wheel structure which on incorporation with PIM-1 results in high stability and superior gas separation performance.
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مولانا اشرف علی تھانوی

آہ! حکیم الامت
اِنَّکَ مَیِّت’‘ وَّاِنَّھُمْ مَیِّتُوْنْ
یوں تو موت اس عالمِ آب وگل کی ہراس چیزکے لیے ہی مقدر ہے جو زندگی کاعاریتی لباس پہن کر بساطِ ہستی پرنمودار ہوئی ہے۔لیکن جس طرح زندگی زندگی میں فرق ہوتا ہے۔اسی طرح ہرایک کی موت بھی یکساں نہیں ہوتی۔ کبھی کبھی ایسی اموات بھی واقع ہوتی ہیں جوصرف افراد واشخاص کی اموات نہیں ہوتیں بلکہ ان ہزاروں لاکھوں انسانوں کی عمارتِ حیات بھی اس سے متزلزل ہو جاتی ہے جومرنے والے کے دامانِ عقیدت وارادت سے وابستہ ہوتے ہیں۔ پھراس کی موت کاماتم آنکھوں کے چند قطرہ ہائے اشک سے نہیں ہوتا۔بلکہ ہزاروں دلوں کی پرسکون آبادیاں ایک مستقل غم کدۂ آمال دامانی بن کر رہ جاتی ہیں۔ امیدوں اور ولولوں کے چراغ بجھ جاتے ہیں ۔نشاط وکامرانی ٔحیات کے آتش کدے سرد ہوجاتے ہیں اورایسا محسوس ہوتاہے کہ اس حادثہِ جان کاہ نے کائناتِ عالم کی ہرہر چیز کواداس اورغمگین بنادیا ہے۔اسی قسم کی ایک موت پرعربی شاعر نے کہاتھا۔
وماکان قیس’‘ ھلکہٗ ھلک واحد
ولکنَّہ بنیانُ قومٍ تَھَدَّمَا
قیس کامرنا صرف ایک شخص کامرنا نہیں ہے
بلکہ وہ ایک قوم کی بنیاد تھا جومنہدم ہوگئی
گذشتہ ماہِ جولائی کی تاریخ ۱۹؍ ۲۰؍کی درمیانی شب کو تقریباً دس بجے حکیم الامت حضرت مولانا اشرف علی صاحب تھانوی کاجو سانحۂ ارتحال پیش آیاوہ اسی قسم کاسانحہ تھا۔حضرت مولانا جس طرح شریعت کے عالم متبحر تھے طریقت اور سلوک میں بھی مقامِ رفیع کے مالک تھے۔ان کی ذات علومِ ظاہری وباطنی کا مخزن تھی۔علمِ سفینہ سے زیادہ علم سینہ ان کااصلی جوہر اور زیور تھا۔تحریریں علم و فضل کامعدن ہوتی تھیں اور تقریر بھی بلاکی اثر انگیز تھی، وہ جس بات کوحق سمجھتے تھے اسے برملا کہتے اور کرتے تھے اوراس میں انھیں کسی لومۃ لائم کی پروا نہیں ہوتی تھی۔خودایک درویش گوشہ نشین تھے۔مگران کاآستانہ بڑے بڑے...

Evaluasi Kebijakan Manajemen Pemerintah Kota Padang Dalam Pencegahan Penyebaran Virus Covid-19

Tujuan dari penelitian ini adalah untuk memahami sejauh mana Implementasi kebijakan pemerintah dalam pencegahan penyebaran Covid19, untuk mengetahui implementasi kebijakan pemerintah terhadap masyarakat dan mengetahui faktor yang mempengaruhi dalam pencegahan penyebaran Covid 19. Penelitian ini dilakukan di Kantor Dinas Kesehatan Kota Padang dan Badan Kesatuan Bangsa dan Politik. Penelitian ini menerapkan teknik analisis kualitatif menggunakan pendekatan deskriptif. Hasil dan kesimpulan dari penelitian ini adalah pemerintah telah menerapkan beberapa kebijakan dalam penanganan covid19 diantaranya melakukan pemberian pelayanan kesehatan masyarakat selama masa pandemi. Peraturan yang telah dibuat harus selalu dipatuhi mengingat faktor penghambat dari implementasi kebijakan ini adalah kesadaran diri terhadap bahaya virus Covid19.

Agro-Psychological Studies of Wheat Triticum Aestivum L. under Different Management System

A study on "Agro Physiological study of wheat (Triticum aestivum L.) under different management systems” was conducted at Agricultural Research Station, Serai Nourang (Bannu), NWFP – Pakistan for 2-years during 2003-04 and 2004-05. This study comprised four research experiments. An experiment entitled “To study the effect of irrigation levels under various nitrogen levels” were studied, during this experiment five irrigation levels (120 mm, 230 mm, 360 mm, 470 mm and 600 mm) and five nitrogen doses (Control, 40 kg ha -1 , 80 kg ha -1 , 120 kg ha -1 and 140 kg ha -1 ) were evaluated. Data recorded from the irrigation treatments revealed that maximum (688.45) tillers m -2 , leaf area index (1.66), grains spike -1 (70.57), 1000-grain weight (47.98 g), grain yield (2677.00 kg ha -1 ), biological yield (13978.00 kg ha -1 ), protein in gains (11.91 %), protein (6.64 %), net income (Rs. 39300.00), BCR (3.27 %) and MRR % (327.35) was noted from the plots irrigated with 470 mm water. Identical results were observed during 2004-05 and mean of both year. Statistical analysis of the data also revealed that nitrogen doses significantly affected all parameters except harvest index. It can be inferred from the data showed that maximum (713.50) tillers m -2 , leaf area index (1.74), grains spike -1 (67.06), 1000-grain weight (47.47 g), grain yield (2806.75 kg ha -1 ), biological yield (10817.13 kg ha -1 ), protein in gains (11.49 %), protein (6.33 %), net income (Rs. 34844.00), BCR (2.96 %) and MRR % (296.11) was noted from the plots fertilized with 120 kg N ha -1 . The same trend was followed during 2004-05 and pooled data. In case of interaction between irrigation and nitrogen it was observed that maximum (843.00) tillers m -2 , leaf area index (1.61), grains spike -1 (74.90), 1000-grain weight (49.72 g), grain yield (3150.00 kg ha -1 ), biological yield (16260.00 kg ha -1 ), protein in gains (15.02 %), protein (14.94 %), net income (Rs. 48087.00), BCR (3.65 %) and MRR % (364.685) was noted from the plots irrigated with 470 mm water and fertilized with 120 kg N ha - 1 . Similar trend was observed in 2004-05 and in two years average VIIIThe 2 nd experiment was conducted to study the response of wheat to various irrigation levels and different seed rates, five irrigation levels (I 1 = 120 mm, I 2 = 230 mm, I 3 = 360 mm, I 4 = 470 mm and I 5 = 600 mm) and five seed rates (S 1 = 60 kg ha -1 , S 2 = 80 kg ha -1 , S 3 = 100 kg ha - 1 , S 4 = 120 kg ha -1 and S 5 = 140 kg ha -1 ) were used.. Data recorded from the irrigation treatments revealed that maximum (362.35) tillers m -2 , grains spike -1 (64.80), leaf area index (4.24), 1000- grain weight (43.19 g), grain yield (3130.00 kg ha -1 ), biological yield (13167.50 kg ha -1 ), net income (Rs. 44283.00), BCR (3.71 %) and MRR % (370.82) was noted from the plots irrigated with 470 mm water. The same trend was followed during 2004-05 and pooled data. Statistical analysis of the data also revealed that seed rates were significantly affected all parameters except biological yield and harvest index. It can be inferred from the data showed that maximum ((346.10) tillers m -2 , grains spike -1 (62.70), leaf area index (4.08), 1000-grain weight (43.15 g), grain yield (3160.00 kg ha -1 ), biological yield (10403.00 kg ha -1 ), net income (Rs. 39967.00), BCR (3.46 %) and MRR % (345.95) was noted from the plots seeded with 120 kg ha -1 . In 2004- 05 and both year average, almost the same trend was observed. In case of interaction between irrigation and seed rate it was observed that maximum (386.25) tillers m -2 , grains spike -1 (70.00), leaf area index (4.78), 1000-grain weight (45.20 g), grain yield (3800.00 kg ha -1 ), biological yield (14287.50 kg ha -1 ), net income (Rs. 54043.00), BCR (4.26 %) and MRR % (426.35) was noted from the plots irrigated with 470 mm water and seed rate was used @ 120 kg ha -1 . Similar trend was observed in 2004-05 and in two years average. Identical results were observed during 2004-05 and mean of both years An experiment entitled “Yield and yield components of wheat as affected by different seed rates and nitrogen levels” was conducted during 2003-04 and 2004-05. Five seed rates (S 1 = 60 kg ha -1 , S 2 = 80 kg ha -1 , S 3 = 100 kg ha -1 , S 4 = 120 kg ha -1 and S 5 = 140 kg ha -1 ) and five nitrogen doses (N 0 = Control, N 1 = 40 kg ha -1 , N 2 = 80 kg ha -1 , N 3 = 120 kg ha -1 and N 5 = 140 kg ha -1 ) were applied. Analysis of the data recorded from the irrigation treatments showed that maximum (334.85) tillers m -2 , leaf area index (4.50), grains spike -1 (60.80), 1000-grain weight (41.91 g), grain yield (3957.64 kg ha -1 ), biological yield (10172.40 kg ha -1 ), protein in gains (7.13 %), protein (6.90 %), net income (Rs. 50225.00), BCR (4.28 %) and MRR % (428.27) was noted from the plots which were seeded with 120 kg ha -1 . Identical results were observed during 2004-05 and mean of both years. Statistical analysis of the data also revealed maximum (348.00) tillers m -2 , leaf area index (4.42) grains spike -1 (63.90), 1000-grain weight (42.19 g), grain yield IX(4145.14 kg ha -1 ), biological yield (10579.75 kg ha -1 ), protein in gains (9.87 %), protein (8.09 %), net income (Rs. 52831.00), BCR (4.46 %) and MRR % (446.21) was noted from the plots fertilized with 120 kg N ha -1 . The same trend was followed during 2004-05 and pooled data. In case of interaction between irrigation and nitrogen it was observed that maximum (380.75) tillers m -2 , leaf area index (5.39), grains spike -1 (68.25), 1000-grain weight (44.20 g), grain yield (4663.20 kg ha -1 ), biological yield (11270.00 kg ha -1 ), protein in gains (11.82 %), protein (13.55 %), net income (Rs. 60179.00), BCR (4.88 %) and MRR % (488.25) was noted from the plots seeded with 120 kg ha -1 seed rate and fertilized with 120 kg N ha -1 , while maximum leaf area index (1.57) was recorded from the plots seeded with 120 kg ha -1 and fertilized with 80 kg N ha - 1 . Similar trend was observed in 2004-05 and in two year average The 4 th experiment was conducted to study the response of different wheat varieties to various seed rates. The experiment consists of five different wheat varieties (V 1 = Nasir - 2k, V 2 = Salim - 2k, V 3 = Bakhtawar-92, V 4 = Fakhre-e-Sarhad and V 5 = Lucky J-03) were sown at five various seed rates (S1 = 60 kg ha -1 , S 2 = 80 kg ha -1 , S 3 = 100 kg ha -1 , S 4 = 120 kg ha -1 and S 5 = 140 kg ha -1 ). Data recorded from the varieties treatments revealed that maximum tillers m -2 (377.30), leaf area index (4.10), grains spike -1 (68.05), 1000-grain weight (45.24 g), grain yield (4022.50 kg ha -1 ), biological yield (16660.92 kg ha -1 ), net income (Rs. 61921.00), BCR (4.99 %) and MRR % (499.49) was noted from the plots sown with variety Fakhre Sarhad . The same trend was followed during 2004-05 and pooled data. Statistical analysis of the data also revealed that seed rates were significantly affected all parameters except biological yield and harvest index. It can be inferred from the data showed that maximum ((369.20) tillers m -2 , grains spike -1 (65.30), leaf area index (4.03), 1000-grain weight (45.30 g), grain yield (4222.80 kg ha -1 ), biological yield (15030.53 kg ha -1 ), net income (Rs. 62119.00), BCR (5.18 %) and MRR % (518.03) was noted from the plots seeded with 120 kg ha -1 . In 2004-05 and in two years average, almost the same trend was observed. In case of interaction between varieties and seed rate it was observed that maximum (420.25) tillers m -2 , leaf area index (4.79), grains spike -1 (74.00), 1000-grain weight (47.33 g), grain yield (4676.25 kg ha -1 ), biological yield (19535.16 kg ha -1 ), net income (Rs. 66863.00), BCR (5.47 %) and MRR % (546.95) was noted from the plots sown with Fakhre Sarhad and seed rate was used @ 120 kg ha -1 . Similar trend was observed in 2004-05 and in two year average. Identical results were observed during 2004-05 and mean of both years.