قائمة الطعام
This paper aims to examine the combustion characteristics of Chikila (CHK) coal from Nigeria. The results revealed that CHK has high carbon, fixed carbon, but …
1.1.3.2 Sulfur Oxides4 -. Gaseous SO from coal combustion are primarily. x sulfur dioxide (SO 2), with a much lower quantity of sulfur trioxide (SO 3) and gaseous sulfates. These compounds form as the organic and pyritic sulfur in the coal are oxidized during the combustion process. On average, about 95 percent of the sulfur present in ...
The weight fraction of C, defined in percentage as wt.%, improved from 56 to 68 wt.% and the high heating value rose from 26.4 to 30.0 MJ·kg−1 as torrefaction temperature increased, reaching ...
Abstract. This study was carried out to investigate the properties of bio-coal briquette produced from blending cassava stalk and coal. The cassava stalk and coal lumps were carbonized at 160 oC ...
The minimum values of ignition delay times are about 3 s, the maximum ones are about 25 s. In addition to the established difference in the ignition delay times, the various fuel compositions also differ in combustion temperatures. Maximum values reaching 1,300 °C for compositions with 10% of used oil.
This paper aims to examine the combustion characteristics of Chikila (CHK) coal from Nigeria. The results revealed that CHK has high carbon, fixed carbon, but low nitrogen, sulphur, and ash content.
This study was carried out to investigate the properties of bio-coal briquette produced from blending cassava stalk and coal. The cassava stalk and coal lumps were carbonized at 160 oC, pulverized and used to produce biocoal briquettes of 10 %, 20 %, 30 %, 40 %, 50 %, 60 %,70 %, 80 %, 90 % and 100 % biomasses. The briquettes were …
The study also presents valuable insights into the evolved gas and potential emissions from the combustion of lignite coals from Nigeria. It is envisaged that the findings will provide data for the future design, optimization, and operation of lignite-based coal-fired power generation in Nigeria.
Results showed that average High-Power Thermal Efficiency was 28.8% for corn cob/coal and 26.0% for PMF/coal briquettes, but High-Power CO emissions decreased from 10.8 mg/MJd to 8.9 mg/MJd (8.31 ...
Combustion of Duduguru Coal: Physico-Chemical, ... fixed carbon (>50 wt %), volatiles (>35 wt %), and heating value (>25 MJ/kg) along with low moisture and sulphur as required for thermal energy recovery. ... duduguru, coal, Nigeria DOI: 10.3103/S1068364X22700302 1. INTRODUCTION Coal is a brownish-black and carbon-rich sedi-mentary rock formed ...
Coal combustion can be described as a two-stage process. The first stage is the chemical adsorption of oxygen on the coal surface to produce intermediate substances, C x O y . The second stage is decomposition of the intermediate substances to two combustion products, i.e., CO 2 and CO.
COMBUSTION CHARACTERISTICS Nigerian coal is subbituminous coal, of medium quality, and non-coking. The coals have good caloric value, low ash content, and high hydrocarbon and resin content. Table 2 gives an 180 C. I. EZEKWE and A. 0.
The Nigerian coal reserves are in the excesses of three billion (3,000,000,000) tons of indicated reserves spread over seventeen coal fields and over six hundred million (600,000,000) tons of proven reserves (Obaje 2009; Raw Material Research and Development Council 2015).These coal deposits and resources are spread over 13 …
Abstract Coal is a cheap and widely abundant fossil fuel that currently accounts for a significant share (35–40%) of the global energy mix. As a result, coal-fired electricity has catalyzed rapid socioeconomic growth and sustainable development worldwide. With the rapidly growing global energy demands, emerging economies like …
The three coal samples considered originated from Northern Benue trough, Central Benue trough and In this paper, characterization and ash chemistry of selected Nigeria coal samples were investigated to determine its suitability as a solid fuel.
Study on the Combustion Properties of Bio-Coal Briquette Blends of Cassava Stalk Ikelle, I.I.1, ... and calorific value (25834 kJ/kg). For the raw coal, the proximate analyses results are moisture content of (3.25 %), volatile matter of (20.12 %), ash content of (10.12 %) and calorific value of ... at Nigeria Coal Corporation, Enugu. Bio-coal ...
The estimated reserves of the ten coal deposit amount to 2.1 Gt, which is about 84% of the total coal reserves of the country 2.5 Gt of coal Nigeria. The key clean coal technologies studied are Ultra-Supercritical Combustion (USC), Supercritical-Fluidised Bed Combustion (FBC), Integrated Gasification Combined Cycle (IGCC) and …
43 42 fixed carbon (%) 41 40 39 38 37 36 35 L1 L2 L3 L4 L5 coal samples Figure 5: fixed carbon values of Guyuk (Lamza) coal at different locations pH of Coal Samples non-metallic oxides (e.g. sulphur) which on contact Figure 6 comparatively presents the pH of the coal with water molecules can form various types of acids samples.
In Nigeria, the bulk of the energy usage is mostly for cooking at level, which is mainly derived from biomass (67% fuelwood, 6% charcoal) and fossil fuel (18% coal and kerosene [4]. The rate of usage of fuel wood as source of energy has its own disadvantages hardship on women and children, emission of toxic atmospheric pollutants …
Coal production in Nigeria has faced many challenges which inhibited its development and ultimately led to the closure of the industry. This paper seeks to discuss the reasons for the failure of ...
The Maiganga coal, having the highest moisture content of 11.01% (Table 4) which is far more than the acceptable value is considered least matured than the … See more
However, the discovery of vast coal deposits across the nation's. Despite Nigeria's vast mineral and energy resources, the nation lacks sufficient electricity generation capacity to stimulate sustainable growth and infrastructural development. However, the discovery of vast coal deposits across the nation's
The coal deposits discovered so far in Nigeria are located mainly in the Lower, Middle and Upper Benue Trough. ... (Paper) ISSN 2225-0948 (Online) Vol. 3, 1, 2013 6.0 Economic Geology 6.1 Combustion The calorific value of an air dried sample of Nigerian coal is usually between 7,000 and 8,000 kca/kg (Orajaka et al., 1990 ...
Petroleum and Coal Pet Coal (2020); 62(3): 1131-1137 ISSN 1337-7027 an open access journal 3. Results and discussion 3.1. Physicochemical properties
Coal combustion and kinetics is a complicated process, due to the presence of a great number of complex components and their parallel and consecutive reactions. ... The heating value of the coal samples are in the range of 2524–3642 cal/g. On the other hand, the carbon content of the coal samples varies between 31.68 and 42.97%. Coal …
Large numbers of trace elements occur in coals used for coal power plants combustion. In order to assess the environmental impact of the coal fuel cycle, coal and coal ash …
Coal layers up to 1 m thick, exposed mainly on river banks in the vicinity of Agbor, Okhuokhuo and Ubiaja, Southern Nigeria, were examined by means of organic petrology, mineralogy and ...
Based on the peak temperature at the maximum weight loss rate, which indicates coal combustibility, Ezimo coal seems to be more combustible than Odagbo …
Department of Mechanical/Marine Engineering, Faculty of Engineering, Niger Delta University, Wilberforce Island, Bayelsa State, Nigeria *Email: yemi.olisa@yahoo, [email protected], Tel: +234(0)8038990747, +234(0)8139625173. ABSTRACT: Some solid waste incinerators burn waste that does not possess enough calorific value …
1.2 Anthracite Coal Combustion. 1.2.1 General1-5. Coal is a complex combination of organic matter and inorganic ash formed over eons from successive layers of fallen vegetation. Coals are classified by rank according to their progressive alteration in the natural metamorphosis from lignite to anthracite. Coal rank depends on volatile matter ...
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