Pilot plant modeling of Advanced Flash Stripper with piperazine

Implementation of carbon capture using amine scrubbing is limited by the large energy penalty of CO₂ capture and compression. Alternative stripper designs can reduce lost work in the stripper by implementing heat recovery unit operations and reducing opportunities for solvent degradation. The advanced flash stripper (AFS) has reduced the required equivalent work by 12-15% compared to the simple stripper by using multiple solvent bypasses to equalize heat capacity across cross exchangers and minimizing lost latent heat of water vapor in the condenser. The Advanced Flash Stripper using 5 m piperazine was studied at the National Carbon Capture Center (NCCC) pilot plant, which presented the novel opportunity to test the solvent and design configuration with coal-fired power plant flue gas. Piperazine (PZ) solvent was stripped of CO₂ with an average stripper operating temperature of 150 °C The energy cost averaged 2.2 GJ/MT CO₂ for the AFS and 3.8 GJ/MT CO₂ for the simple stripper (SS). A temperature-control heuristic for controlling bypass flowrates was evaluated using five AFS test cases. Using bypass temperature differences of 7 °C, the bypass rates were automatically controlled to within 5% of the optimal bypass configuration. While the method was successful in simulations, unexpected heat loss in the NCCC plant limited the accuracy of the temperature-control heuristic due to the heat loss reducing the benefits of heat recovery unit operations. Overall energy balances of the AFS using the Independence model showed a positive heat gain of 65000 Btu/hr. The unexpected heat gain was attributed to an overestimated heat of absorption in the Independence model, as well as an underestimation of the total heat transferred from the process steam. A test AFS run was analyzed using three different assumption methods, with energy requirements varying from 2.1 – 3.0 GJ/MT CO₂.Chemical Engineerin

Rhodium Complex Catalyzed Alcohol Carbonylation Reactions

The oxidative addition reaction of methyl iodide to rhodium or iridium complexes were investigated, incorporating various orthro-substituted dimethylphenylphosphine ligands on the metal complexes. Evidence of rate enhancement for the oxidative addition reaction of the various complexes with methyl iodide was found, due to the influence of the ortho-substitutes. The complexes studieded were:Carbonyl (chloro) bis-[o-chlorophenyl (dimethyl) phosphine] -rhodium (I)Carbonyl (chloro) bis-[o-bromophenyl (dimethyl) phosphine] -rhodium (I)Carbonyl (chloro) bis-[dimethyphenlphosphine] -rhodium (I)Carbonyl (chloro) bis-[o-chlorophenyl (dimethyl) phosphine] -rhodium (I)The increase in relative reaction rates for the complexes were found to proceed in the order: Br \u3e Cl \u3e H for ortho-phenyl substituent and Ir (I) . Rh (I) for complexes of similar ligand type

Commercial education in the Civilian Conservation Corps

Thesis (M.A.)--Boston University, 1938. This item was digitized by the Internet Archive

Sex education in the secondary school

Thesis (M.A.)--Boston University, 1950. This item was digitized by the Internet Archive

Alien Registration- Lacasse, Joseph Leo (Jackman, Somerset County)

https://digitalmaine.com/alien_docs/7006/thumbnail.jp

MARRIAGE ACROSS THE TAIWAN STRAIT:MALE MIGRANTS, MARITAL DESIRE AND SOCIAL LOCATION

This dissertation addresses the ways in which government policies and agendas, mediarepresentations, local histories and perceptions influence marriage patterns across the TaiwanStrait. While socio-economic interactions between the Republic of China (Taiwan or ROC) andthe Peoples Republic of China (PRC or Mainland China) have deepened in recent years, bothgovernments continue to often have conflicting agendas and policies aimed at supporting theirown goals. As a result, Taiwan promotes a policy of careful interaction with Mainland Chinawhich is reflected in Taiwan's strict immigration policies with regard to Mainland brides who areconsidered a threat to Taiwan's "population quality" (renkou suzhi).The PRC, on the other hand, has established policies aimed at increasing economic andsocial integration with Taiwan. Taiwanese men on the Mainland enjoy preferential treatment,particularly in China's Special Economic Zones. As more people travel across the Taiwan Strait,the number of cross-Strait (PRC-ROC), marriages have increased on the Mainland. Traditionalmarriage and kinship practices such as patrilocal marriages are often cited as primary factors ininfluencing women's place in Chinese society (Davin 2008, Johnson 1983, Lu 1997, Watson1991). However, a Mainland woman who marries a Taiwanese man and sets up a householdnear her natal home can have a very different experience. This practice, in turn, has in somecases led to more flexibility with regard to gender roles and mutual upward social mobility forboth partners on the Mainland.Finally this dissertation contributes to the academic literature regarding cross-bordermarriage and "global hypergamy," which usually refers to women from less developed, poorerregions who attempt to "marry up" by finding husbands in a more developed, richer area(Constable 2005). In this study, I consider a very different situation; men who migrate from amore developed region (Taiwan) to areas that are being developed (SEZ's). While most did notmigrate for the express purpose of marrying, these unions formed as a result of the migrationprocess. Examining these relationships reveal some interesting insights into the ways that recent shifts in the global economic landscape related to China's economy influence marriage patternsand marital relations