Give step-by-step solution with explanation and final answer:
Act like a helpful tutor and exlain me :
Only answer 3.2( b )3.27 (a) What percent efficiency must an ash collector for a coal-fired power plant have to meet
the NSPS for coal-fired power plants (Table 3.1)? See inside the back cover for the
properties of typical coal.
(b) Is the 0.03 1b/10° Btu rule more or less restrictive than the I percent emission rule?
(c) At what percent ash in the coal would the two rules be equally restrictive?
(d) Why are there two separate restrictions? (To answer this part of the question, you must
know some of the history of these regulations beyond that presented in this book.)
TABLE 3.1
Et a EeHormance od pi tatlonary sources (commonly called
CoE Sees cl RO
Tn lstis on excerpt from the 2015 version of 40CERG0. Standards relisted therefor 101 indusiral categories
ew categories are regularly added. and existing ones modified. This excerpt shows the kind of regulations that
are contained in that much larger compilation
1. Coal-fired power plants whose construction started after September 18, 1978, may not emit the following
to the atmosphere:
a. Particulate matter more than 0.03 1/10° Btu, or 1% of the ash solids in the fuel, whichever is less
b. Sulfur dioxide more than 1.2 16/10° Btu, or more than 30% of the SO; that would be formed if all the
sulfur in the coal were converted to SO, whichever is less.
¢. Nitrogen oxides more than 0.6 1b/10° Btu for most coals, or 0.5 1b/10° Btu for sub-bituminous coal.
2. Large incinerators shall not emit to the atmosphere gases that contain more than 34 me/dry standard cubic
meter of particulates. There are also limits of opacity, cadmium, lead, mercury, and acid gases.
3, Portland cement plants constructed after June 16, 2008 shall not emit to the atmosphere the following
4. Gases from the kiln containing more than 0.02 Ib of particulates/ton of clinker.
'b, Gases from the clinker cooler containing more than 0.02 1b of particulates/ton of clinker.
4. Ni ric acid plants shall not emit gases containing more than 3.0 1b of NO; per ton of nitric acid produced.
5 8 frie id plants shall not emit gases containing more than 4 1b of SO; and/or 0.15 1b of sulfuric acid
to n of aci d produced (100% basis).
e regulations also limit the opacity of the plumes from these plants, mostly as a control measure,
detailed descriptions of testing and ‘monitoring requirements. The Federal Register document
regulations for Electric Utility Steam Generating Units (for coal and for other fuels) is
thers are mostly shorter.
Question:
Give step-by-step solution with explanation and final answer:
Act like a helpful tutor and exlain me :
Only answer 3.2( b )3.27 (a) What percent efficiency must an ash collector for a coal-fired power plant have to meet
the NSPS for coal-fired power plants (Table 3.1)? See inside the back cover for the
properties of typical coal.
(b) Is the 0.03 1b/10° Btu rule more or less restrictive than the I percent emission rule?
(c) At what percent ash in the coal would the two rules be equally restrictive?
(d) Why are there two separate restrictions? (To answer this part of the question, you must
know some of the history of these regulations beyond that presented in this book.)
TABLE 3.1
Et a EeHormance od pi tatlonary sources (commonly called
CoE Sees cl RO
Tn lstis on excerpt from the 2015 version of 40CERG0. Standards relisted therefor 101 indusiral categories
ew categories are regularly added. and existing ones modified. This excerpt shows the kind of regulations that
are contained in that much larger compilation
1. Coal-fired power plants whose construction started after September 18, 1978, may not emit the following
to the atmosphere:
a. Particulate matter more than 0.03 1/10° Btu, or 1% of the ash solids in the fuel, whichever is less
b. Sulfur dioxide more than 1.2 16/10° Btu, or more than 30% of the SO; that would be formed if all the
sulfur in the coal were converted to SO, whichever is less.
¢. Nitrogen oxides more than 0.6 1b/10° Btu for most coals, or 0.5 1b/10° Btu for sub-bituminous coal.
2. Large incinerators shall not emit to the atmosphere gases that contain more than 34 me/dry standard cubic
meter of particulates. There are also limits of opacity, cadmium, lead, mercury, and acid gases.
3, Portland cement plants constructed after June 16, 2008 shall not emit to the atmosphere the following
4. Gases from the kiln containing more than 0.02 Ib of particulates/ton of clinker.
'b, Gases from the clinker cooler containing more than 0.02 1b of particulates/ton of clinker.
4. Ni ric acid plants shall not emit gases containing more than 3.0 1b of NO; per ton of nitric acid produced.
5 8 frie id plants shall not emit gases containing more than 4 1b of SO; and/or 0.15 1b of sulfuric acid
to n of aci d produced (100% basis).
e regulations also limit the opacity of the plumes from these plants, mostly as a control measure,
detailed descriptions of testing and ‘monitoring requirements. The Federal Register document
regulations for Electric Utility Steam Generating Units (for coal and for other fuels) is
thers are mostly shorter.
This is AI generated Response.
Asked by: manish kumar
Created at: 2025-09-21 20:44:06
Final Answer:
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## Step-by-Step Solution for 3.2(b)
### **Restate the Question**
**3.2(b): Is the 0.03 lb/10⁶ Btu rule more or less restrictive than the 1 percent emission rule?**
We need to compare:
- **0.03 lb/10⁶ Btu of particulate matter**
- **1% of the ash solids in the fuel**
The standard says **"whichever is less"**—so the more restrictive rule is the one that allows less particulate emission.
---
### **Step 1: Understand the Two Rules**
#### **Rule 1: 0.03 lb/10⁶ Btu**
- This limits how much particulate matter (ash) can be emitted per million Btu of heat input.
#### **Rule 2: 1% of the ash solids in the fuel**
- This says the plant cannot emit more than 1% of the total ash content in the coal.
---
### **Step 2: Which Rule is More Restrictive?**
To compare, let's use a typical scenario:
#### **Assume:**
- **Typical coal ash content:** About 10% by weight.
- **Heat content of coal:** About 12,000 Btu/lb.
#### **Calculate Ash Input Per 10⁶ Btu:**
- **1 lb coal → 12,000 Btu**
- **10⁶ Btu → (10⁶ Btu) / (12,000 Btu/lb) = 83.33 lb coal**
- **Ash in 83.33 lb coal = 10% × 83.33 lb = 8.33 lb ash**
#### **1% of Ash Input =**
- **1% of 8.33 lb = 0.0833 lb of ash per 10⁶ Btu**
---
#### **Compare to 0.03 lb/10⁶ Btu**
- **0.03 lb/10⁶ Btu** vs **0.0833 lb/10⁶ Btu**
**0.03 lb/10⁶ Btu** is LESS than **1% of the ash input**.
---
### **Step 3: Conclusion**
- **The 0.03 lb/10⁶ Btu rule is more restrictive** (stricter) than the 1 percent emission rule for typical coal.
- In other words, it allows less particulate matter to be emitted.
---
## **Final Answer**
> **The 0.03 lb/10⁶ Btu rule is more restrictive than the 1 percent emission rule for typical coal, because it allows less ash to be emitted per unit energy produced.**
Let me know if you'd like to see the calculations for a different ash content or more explanation!
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