تفاصيل مارك
| 000 -LEADER |
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| fixed length control field |
06735namaa22004331i 4500 |
| 003 - CONTROL NUMBER IDENTIFIER |
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| control field |
EG-GICUC |
| 005 - أخر تعامل مع التسجيلة |
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20260422104113.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
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260406s2025 ua a|||frm||| 000 0 eng d |
| 040 ## - CATALOGING SOURCE |
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| Original cataloguing agency |
EG-GICUC |
| Language of cataloging |
eng |
| Transcribing agency |
EG-GICUC |
| Modifying agency |
EG-GICUC |
| Description conventions |
rda |
| 041 0# - LANGUAGE CODE |
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| Language code of text/sound track or separate title |
eng |
| Language code of summary or abstract |
eng |
| -- |
ara |
| 049 ## - Acquisition Source |
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| Acquisition Source |
Deposit |
| 082 04 - DEWEY DECIMAL CLASSIFICATION NUMBER |
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| Classification number |
631.3016 |
| 092 ## - LOCALLY ASSIGNED DEWEY CALL NUMBER (OCLC) |
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| Classification number |
631.3016 |
| Edition number |
21 |
| 097 ## - Degree |
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| Degree |
M.Sc |
| 099 ## - LOCAL FREE-TEXT CALL NUMBER (OCLC) |
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| Local Call Number |
Cai01.07.02.M.Sc.2025.He.P |
| 100 0# - MAIN ENTRY--PERSONAL NAME |
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| Authority record control number or standard number |
Heba Mohamed Moustfa Ali, |
| Preparation |
preparation. |
| 245 10 - TITLE STATEMENT |
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| Title |
Production and evaluation of dry bio –fuels from rice straw and cotton stalk by torrefaction process / |
| Statement of responsibility, etc. |
by Heba Mohamed Moustfa Ali ; Supervisors Dr. Yossry Bayoumy Abdelhay, Dr. Badr Ali Mohamed. |
| 246 15 - VARYING FORM OF TITLE |
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| Title proper/short title |
انتاج وتقييم وقود حيوى جاف من قش الأرز وحطب القطن عن طريق عملية الانحلال الحرارى الوسطى |
| 264 #0 - PRODUCTION, PUBLICATION, DISTRIBUTION, MANUFACTURE, AND COPYRIGHT NOTICE |
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| Date of production, publication, distribution, manufacture, or copyright notice |
2025. |
| 300 ## - PHYSICAL DESCRIPTION |
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| Extent |
94 pages : |
| Other physical details |
illustrations ; |
| Dimensions |
25 cm. + |
| Accompanying material |
CD. |
| 336 ## - CONTENT TYPE |
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| Content type term |
text |
| Source |
rda content |
| 337 ## - MEDIA TYPE |
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| Media type term |
Unmediated |
| Source |
rdamedia |
| 338 ## - CARRIER TYPE |
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| Carrier type term |
volume |
| Source |
rdacarrier |
| 502 ## - DISSERTATION NOTE |
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| Dissertation note |
Thesis (M.Sc)-Cairo University, 2025. |
| 504 ## - BIBLIOGRAPHY, ETC. NOTE |
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| Bibliography, etc. note |
Bibliography: pages 78-94. |
| 520 #3 - SUMMARY, ETC. |
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| Summary, etc. |
This research aims to estimate and calculate some thermal properties of <br/>Torrefied product from torrefaction process of rice straw and cotton stalk under <br/>different torrefaction temperatures (200, 250, 300 ℃), size (1.5 , 3 cm) and holding <br/>time (15, 30, 45 minutes). The calorific value for torrefied product was estimated and <br/>the mass yield, energy yield and energy density were calculated for rice straw and <br/>cotton stalk. Also some morphological, physical and mechanical measurement were <br/>estimated for torrefied rice straw and cotton stalk. The results showed that the calorific <br/>value is affected by the torrefaction temperature, size and holding time. The highest <br/>calorific value for rice straw was 18.7 MJ / kg and for cotton stalk was 20.1 MJ/kg, at <br/>torrefaction temperature of 250 ℃, size 1.5 cm, and holding time 30 min. The results <br/>also showed that the mass yield and energy yield decrease with increasing torrefaction <br/>temperature, size and holding time, the highest value of mass yield and energy yield <br/>for rice straw were 70.1% and 72.84%, respectively, at torrefaction temperature 200 <br/>℃ and size 1.5 cm and holding time 15 minutes. The lowest value of mass yield and <br/>energy yield for rice straw was 38% and 44.64%, respectively, at temperature 300 ℃, <br/>size 3 cm, and holding time 45 minutes. The highest value of mass yield and energy <br/>yield for cotton stalk was 74.5% and 76.44%, respectively, at torrefaction temperature <br/>200 ℃, size1.5 cm, and a holding time of 15 minutes. The lowest value of mass yield <br/>and energy yield for cotton stalk were 40.25% and 45.5%, respectively, at torrefaction <br/>temperature 300 ℃, size of 3 cm, and holding time of 45 minutes. Also, the result <br/>indicated that the energy density for rice straw and cotton stalk was affected by the <br/>torrefaction temperature, size and holding time, the highest value of energy density <br/>for rice straw and cotton stalk were 1.24 and 1.17 respectively at torrefaction <br/>temperature of 250 ℃, size 1.5 cm, and holding time 30 min. The lowest value of <br/>energy density for rice straw and cotton stalk were 1.019 and 1.014.Maximum tensile <br/>stress, maximum compression stress, maximum bending stress for torrefied pellets of <br/>rice straw was 0.82979, 2.29225 and 2.14295 N/mm2. Maximum tensile stress, <br/>maximum compression stress, maximum bending stress for torrefied pellets of cotton <br/>stalk was 0.19278, 1.18872 and 0.87646 N/mm2. The average cost of producing <br/>Torrefied pellets from rice straw and cotton stalk was estimated and found to be 11.5-<br/>37% lower than local market prices. |
| 520 #3 - SUMMARY, ETC. |
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| Summary, etc. |
تهدف هذه الدراسة الى انتاج وقود حيوي جاف مكثف عالي القيمة الحرارية من قش الأرز وحطب القطن عن طريق عملية الانحلال الحراري الوسطي وذلك من خلال اجراء عملية الانحلال الحرارى الوسطى تحت درجات حرارة محتلفة (300,250,200◦م) وطول قطع (1.5,3سم) وزمن استبقاء (15,30,45 دقيقة).ثم تحديد أفضل المعاملات للتوصل الى اكبر قيمة حرارية وعائد للكتلة والطاقة والتكثيف للطاقة وذلك لكلا من الكتلة الحيوية لقش الأرز وحطب القطن ثم الطحن والتصبيع في صورة وقود صلب ثم إجراء بعض القياسات الموروفولوجية بالفحص المجهري والخواص الفيزيائية والميكانيكية لأفضل عينات قش الأرز وحطب القطن.وقد أظهرت النتائج أن أفضل معاملة حرارية لقش الأرز وحطب القطن كانت عند درجة حرارة انحلال حرارى وسطى 250 م وزمن استبقاء 30 دقيقة وطول قطع 1.5 سم وعندها تم تحقيق قيمة حرارية ونسبة عائد كتلة وعائد طاقة وكثافة للطاقة لقش الأرز هي 18.7 ميجا جول /كجم ، 70.1 % ، 72.84 % 1.24 على التوالي . بينما كانت لحطب القطن 20.1 ميجا جول /كجم ، 74.5 % ، 76.4 % 1.17 على التوالي. وكان متوسط اجهاد الشد ومتوسط اجهاد الضغط ومتوسط اجهاد الثنى لقش الأرز 0.82979 و 2.29225 و 2.14295 نيوتن/مم2 على التوالي،، وكان متوسط اجهاد الشد ومتوسط اجهاد الضغط ومتوسط اجهاد الثنى لحطب القطن 0.19278 و 1.18872 و 0.87646 نيوتن/مم2 على التوالى. وكانت تكلفة انتاج مصبعات الفحم الصلب لكلا من قش الأرز وحطب القطن تقل عن السوق المحلى بمقدار 11.5- 37%. |
| 530 ## - ADDITIONAL PHYSICAL FORM AVAILABLE NOTE |
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| Issues CD |
Issues also as CD. |
| 546 ## - LANGUAGE NOTE |
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| Text Language |
Text in English and abstract in Arabic & English. |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
Agricultural Engineering |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
الهندسة الزراعية |
| 653 #1 - INDEX TERM--UNCONTROLLED |
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| Uncontrolled term |
Torrefaction |
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Calorific value |
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Energy yield, |
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mass yield |
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energy density |
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rice straw |
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Cotton stalk |
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morphological and mechanical properties |
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الانحلال الحراري الوسطى |
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القيمة الحرارية |
| 700 0# - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Yossry Bayoumy Abdelhay |
| Relator term |
thesis advisor. |
| 700 0# - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Badr Ali Mohamed |
| Relator term |
thesis advisor. |
| 900 ## - Thesis Information |
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| Grant date |
01-01-2025 |
| Supervisory body |
Yossry Bayoumy Abdelhay |
| -- |
Badr Ali Mohamed |
| Universities |
Cairo University |
| Faculties |
Faculty of Agriculture |
| Department |
Department of Agricultural Engineering |
| 905 ## - Cataloger and Reviser Names |
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| Cataloger Name |
Shimaa |
| Reviser Names |
Eman Ghareb |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
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| Source of classification or shelving scheme |
Dewey Decimal Classification |
| Koha item type |
Thesis |
| Edition |
21 |
| Suppress in OPAC |
No |