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1-жадвал
Нефть йўлдош газларини ароматлаш жараёнининг ҳароратга, промотор табиатига ва
хомашё оқимининг ҳажмий тезлигига боғлиқлиги
Катализатор
ЮКЦ +
t,°C
V, c
-1
Конверсия,%
Селективлик,%
Унум,%
2 % Zn
Zn(CH
3
COO)
2
550
1200
32,0
30,6
9,8
1000
49,8
65,5
32,6
600
1200
43,0
55,3
23,8
1000
71,5
57,2
40,9
650
1200
76,7
40,0
30,7
1000
96,5
41,7
40,4
5 % Zn
Zn(CH
3
COO)
2
600
1200
50,1
50,7
25,4
1000
69,3
60,7
42,1
650
1200
81,7
30,7
25,1
2 % Zn
Zn(NO
3
)
2
550
1200
54,0
61,3
33,1
600
1200
66,7
52,3
34,9
1000
70,6
56,8
40,1
625
1200
84,3
48,0
40,5
1000
79,7
60,6
48,3
650
1200
90,1
43,6
39,3
1000
89,4
54,6
48,8
5 % Zn
Zn(NO
3
)
2
550
1200
58,6
55,1
32,3
600
1200
75,6
52,6
39,8
1000
73,6
53,3
39,2
625
1200
90,8
43,2
39,3
1000
89,3
59,1
52,8
2% Zn
ZnO
550
1200
46,0
49,3
22,7
600
1000
90,3
32,3
29,2
1200
69,5
44,3
30,8
600
1200
73,5
52,8
38,8
625
1200
91,5
44,0
40,3
233
Ҳарорат кўтарилганда нефть йўлдош газларининг конверсияси ва ароматик
углеводородлар унуми ортади, аммо селективлик камаяди. Шу билан бирга
катализатда бензолнинг миқдори толуолнинг гидродеалкилланиши натижасида
ортади, газ фазада водород, метаннинг миқдорлари ҳам ортади. [1,2].
Фойдаланилган адабиётлар руйхати
[1] N.I.Fayzullayev., S.Yu.Bobomurodova. Laws of Catalytic Aromatization Reaction of C
1
-
C
4
-Carbohydrates and Texture Characteristics of Catalysts//International Journal of Psychosocial
Rehabilitation, Vol. 24, Issue 04, 2020. P-7925-7934.
[2] S.Yu. Bobomurodova., N.I. Fayzullayev., K.A. Usmanova. Catalytic Aroma-tization of
Oil Satellite Gases // International Journal of Advanced Science and Technology Vol. 29, No. 5,
(2020), pp. 3031 - 3039
OILS AND CARBOCHEMICAL PRODUCTS AS SECONDARY
FEEDSTOCKS FOR COKE PRODUCTION
1
Khamidov B.N.
2
Dekhkanboev S.N.
1
k.f.d.рrof. ACADEMY OF SCIENCES RESPUBLIK OF UZBEKISTAN INSTITUTE OF GENERAL
AND INORGANIC CHEMISTRY
2
Doctoral student., Andijan Machine-Building Institute
In recent years, the recycling of plastics from municipal wastes and other post-
consumer sectors has increased considerably. This is because landfill storage is
considered a provisional situation rather than a rational solution for the problem of
wastes. Mechanical recycling is the optimum recovery option for homogeneous and
relatively clean plastic waste streams. However, for certain post-consumer plastics
(unsorted, small pieces, light weight and dirty varieties) this option has technical
limitations and, consequently, other means of recycling such as feedstock recycling
and energy recovery must be considered. The use of plastic waste as a substitute for
coal in the steelmaking industry can be regarded as an eco-efficient alternative for
solving the disposal of plastics and for recycling plastic wastes which are not easy to
recycle by mechanical means. Integrated steel plants offer two routes for plastic
waste recycling: the injection of mixed plastic wastes into the blast furnace via the
tuyeres, a process which involves replacing pulverized coal and coke as a reducing
agent [1]; and the incorporation of plastic wastes into coal blends as additives for
metallurgical coke production. The combination of these two routes in the steel
industry, blast furnace and coking processes, has been demonstrated to be viable at
industrial scale and offers a route for improving energy recovery and feedstock
recycling while providing economic, social and environmental benefits at the same
time [2].
A coking blend (B: 23.6 wt % db volatile matter; 8.9 wt % db ash; 0.57 wt % db
sulphur; 352dd pm Gieseler maximum fluidity) was used to prepare the mixtures with
two plastic wastes (Pa and Pb), one coal-tar from the byproducts of a coking plant
(Ta) and three oils one synthetic oil (Q) and two mixtures of petroleum-based oil
wastes (R and T)-, which are commonly generated at different stages of steel
234
manufacture. The plastic wastes were a three- component mixture Pa (70 % HDPE,
20 % PP, 5 % LDPE and 5 % PET) and a multicomponent waste Pb, mainly
containing about 55 % of polyolefins and 35 % PET and PS. Simultaneous
thermogravimetric and differential thermal analyses (TG/DTA) of the plastics, oils
and tar were carried out up to 600°C at a rate of 10°C/min in a nitrogen atmosphere
[3]. Changes in the plasticity of the coal blend and its blends with the wastes were
measured using a R.B. Automazione PL2000 Gieseler plastometer, following the
ASTM D2639 standard procedure. Co-carbonization tests were carried out in a semi-
pilot movable wall oven of over 15 kg capacity to measure the wall coking pressure
and to produce coke for the evaluation of mechanical and chemical properties. The
coking time was nearly 3 h and the maximum temperature in the centre of the charge
of 950ºC. The amount of mixed plastic waste and oil added to the coking blend was 2
wt %. The quality of the resultant cokes with a view to their use in a blast furnace
was assessed in terms of their reactivity to CO2 at 1100°C for 2 h (CRI) and the
mechanical strength of the partially-gasified coke (CSR) was measured by the NSC
method (ASTM D5341). The cold mechanical strength was evaluated on 10 kg of
coke of >50 mm initial size employing a JIS drum. The DI150/15 index is defined as
the amount of coke >15 mm, after a mechanical treatment of 150 revolutions (JIS
K2151).
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