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Questions and Answers
What is the moisture content (% weight, wet basis) of the waste sample?
What is the moisture content (% weight, wet basis) of the waste sample?
- 85%
- 14% (correct)
- 16.28%
- 6.25%
After drying at 105°C, the sample is placed in a closed crucible at 950°C. What does the weight loss in this step primarily represent?
After drying at 105°C, the sample is placed in a closed crucible at 950°C. What does the weight loss in this step primarily represent?
- Volatile combustible matter (correct)
- Ash content
- Fixed carbon
- Moisture content
What is the volatile combustible matter (% weight) of the waste sample?
What is the volatile combustible matter (% weight) of the waste sample?
- 8%
- 73% (correct)
- 87%
- 13%
The fixed carbon content is determined by heating the sample in an open crucible at 950°C.
The fixed carbon content is determined by heating the sample in an open crucible at 950°C.
What is the ash content (% weight) of the waste sample?
What is the ash content (% weight) of the waste sample?
Which heating step directly determines the ash content?
Which heating step directly determines the ash content?
The difference between the dry sample weight and weight after heating in a closed crucible represents the ______ content.
The difference between the dry sample weight and weight after heating in a closed crucible represents the ______ content.
Calculated by difference, what is the fixed carbon content (% weight) of the waste sample?
Calculated by difference, what is the fixed carbon content (% weight) of the waste sample?
Match the analysis step with the component it primarily measures:
Match the analysis step with the component it primarily measures:
What is required to estimate the energy content (in kcal/kg) using an empirical equation?
What is required to estimate the energy content (in kcal/kg) using an empirical equation?
Flashcards
Moisture Content (Dry Basis)
Moisture Content (Dry Basis)
The percentage of weight lost when heating a sample at 105°C until it reaches a stable weight. Calculated as ((Initial Weight - Dry Weight) / Dry Weight) * 100.
Volatile Combustible Matter
Volatile Combustible Matter
The percentage of weight lost when heating a dry sample in a closed crucible at 950°C. Calculated as ((Dry Weight - Crucible Weight) / Initial Weight) * 100.
Ash Content
Ash Content
The percentage of weight remaining after heating the sample in an open crucible at 950°C, allowing complete combustion. Calculated as (Ash Weight / Initial Weight) * 100
Fixed Carbon
Fixed Carbon
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Energy Content Estimation
Energy Content Estimation
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Study Notes
- A proximate analysis was conducted on a 100g waste sample
- The sample was placed in a 105°C oven until a stable weight of 86g was achieved
Moisture Content
- The moisture content is calculated on a dry basis
- Original weight: 100g
- Weight after drying: 86g
- Moisture content: [(100g - 86g) / 86g] * 100% = 16.28%
Volatile Combustible Matter
- The dried sample (86g) was placed in a closed crucible at 950°C
- Weight after baking in closed crucible: 13g
- Volatile combustible matter: [(86g - 13g) / 86g] * 100% = 84.88%
Fixed Carbon
- The sample was then placed in an open crucible and baked at 950°C
- Weight after baking in open crucible: 5g
- Fixed carbon: [(13g - 5g) / 86g] * 100% = 9.30%
Ash Content
- Weight after baking in open crucible: 5g
- Ash content: (5g / 86g) * 100% = 5.81%
Energy Content Estimation
- The values obtained from the proximate analysis can be used to estimate energy content using empirical equations
- This requires the specific equation, which isn't provided, so energy content cannot be calculated
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