Process Diagram

Band 6+: The diagram below shows how energy is produced from coal.

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Image for topic: The diagram below shows how energy is produced from coal.

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The image is a diagram illustrating the process of how energy is produced from coal. The process starts with coal being transported by a truck, then goes to the furnace where it is mixed with oxygen. Flue gases and hot exhaust gases are produced, which lead to a heat recovery steam generator. Steam is created and goes to a steam turbine that powers a generator to produce electricity. In the purification phase, raw syngas is produced, which undergoes removal of CO2, mercury, and sulfur to create purified syngas. Slag is a byproduct of this process. Gas turbine is also part of the process to generate electricity.

Given the complexity of the image, the above description may not be entirely accurate.

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The given diagram illustrates the complex process of producing electricity from natural fuel, such as coal.

Overall, the process consists of 7 main stages, beginning with transforming raw materials and culminating in powering transmission towers.

Initially, the coal is picked and delivered by specialized vehicle. Having been transported, coal is put into furnace, removing debris, such as slag. The raw syngas, that were gathered from furnace, are enriched by oxygen through a huge pump. Then they are moved to technical removal, which separates purified syngas from other gases such as CO2, Mercury and Sulfur. Having been separated, syngas are sent to gas turbine which powers a generator. Following that, hot exhausted gases are moved to heat recover that releases fumes and recovers a steam. Finally, steam spins a turbine and powers a generator giving energy to create electricity.

Word Count: 138

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Overall Band Score

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Vocabulary Complexity:
C2 - Complex
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Grammar Mistakes: N/A

Vocabulary Repetition:

syngas: 3

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Task Response

The report covers the main stages of the process and provides a general overview. However, there are some inaccuracies and omissions. For example, the report mentions 'transforming raw materials' without specifying what this refers to, and it incorrectly states that slag is removed from the furnace. Additionally, the report could benefit from more specific details about each stage of the process. To improve, focus on accurately describing each step and including relevant details. The report falls short of the required 150 words.

Coherence & Cohesion

The report presents a general overview of the process, but the description of the stages could be clearer and more logically sequenced. The use of cohesive devices is present but could be more effective in creating a seamless flow. Paragraphing is acceptable but could be improved to better reflect the different stages of the process. Consider using more precise language to link the stages and avoid ambiguity.

Lexical Resource

The report uses a range of vocabulary relevant to the topic, but there are instances where the word choice is not entirely accurate or natural ('transforming raw materials,' 'technical removal'). Expanding the range of vocabulary and using more precise terms would enhance the report. Some terms are used imprecisely, affecting clarity.

Grammatical Range & Accuracy

The report contains a mix of simple and complex sentences, but grammatical errors are noticeable and impact clarity. Errors in verb tense, subject-verb agreement, and article usage are present. Focus on improving grammatical accuracy and sentence structure to enhance the overall quality of the report. For example, 'that were gathered' should be 'that was gathered'.

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