1.

Executive Summary

1

2.

Introduction

2

3.

Technical Results and Discussion

5

3.1

Background Technology

5

3.2

Material Qualification (Subtask 3.1)

7

3.2.1

Improving the Surface Membrane

8

3.2.2

Development of a Dual Membrane Candle Filter

10

3.2.3

Mechanical Testing

12

3.2.4

Strengthened Flanges

15

3.2.5

Filtration and Permeability Testing

17

3.3

Field Testing of “Baseline” PRD-66 Filter Elements

19

3.3.1

Tidd Test Segment 4

19

3.3.2

Tidd Test Segment 5

20

3.3.3

Analysis of Field Exposed Elements (Subtask 3.4)

20

3.4

Development of High Efficiency Membranes

29

3.5

Manufacturing Hot Gas Filters (Task 4)

33

3.5.1

Raw Materials Plan (Subtask 4.1)

33

3.5.2

Process Instrumentation (Subtask 4.2)

33

3.5.3

Process Variables Experiments (Subtask 4.3)

34

3.5.4

Process Capability Demonstration (Subtask 4.4)

40

3.5.5

Equipment Analysis and Improvement (Subtask 4.5)

45

3.6

Field Testing of “Improved” PRD-66 Filter Elements

47

3.6.1

High Temperature High Pressure (HTHP) Testing at W-STC

47

3.6.2

PCFBC Exposure at Karhula

53

4.

Conclusions

67

5.

Recommendations

70

6.

Acknowledgements

71

7.

References

72

Appendix A

A-1

Appendix B

B-1