Two tasks were active during the tenth quarter of the CNG acid gas removal project. Subtask 1.4: calibration of instruments and elimination of equipment difficulties for the process development-scale triple-point crystallizer. Subtask 2.1: acquisition of crystallizer rate and mechanical slurry handling data. Within Subtask 1.4, a method was established to allow the washer-melter liquid level to fluctuate within a specified range. Bulk movement of the liquid within this range promotes a ratchet-type upward movement of the solid bed. Continuous crystallizer runs up to 5 hours have been achieved with this intermittent upward movement of the solid bed. The persistent gradual accumulation of solid carbon dioxide in the flasher is now the major obstacle preventing long-term continuous operation of the crystallizer. Within Subtask 2.1, the continuous crystallizer runs this quarter have achieved steady state crystallizer concentration profiles, and permitted measurement of crystallizer separation factors for the system hydrogen sulfide-carbon dioxide. The separation factors fall in the range 1000-3000. The lower bound separation factor, 1000, is double the value used in recent engineering designs of the crystallizer. A complete data log of one crystallizer run with the system hydrogen sulfide-carbon dioxide is presented in Appendix A. 3 references, 68 figures, 12 tables.