title: Carbon Emissions Pinch Analysis (CEPA) for emissions reduction in the New Zealand electricity sector

authors: Atkins, Martin John

subjects: carbon emissions reduction

abstract: Carbon Emissions Pinch Analysis (CEPA) is a recent extension of traditional thermal and mass pinch analysis to the area of emissions targeting and planning on a macro-scale (i.e. economy wide). This paper presents an extension to the current methodology that accounts for increased demand and a carbon pinch analysis of the New Zealand electricity industry while illustrating some of the issues with realising meaningful emissions reductions. The current large proportion of renewable generation (67% in 2007) complicates extensive reduction of carbon emissions from electricity generation. The largest growth in renewable generation is expected to come from geothermal generation followed by wind and hydro. A four fold increase in geothermal generation capacity is needed in addition to large amounts of new wind generation to reduce emissions to around 1990 levels and also meet projected demand. The expected expansion of geothermal generation in New Zealand raises issues of GHG emissions from the geothermal fields. The emissions factors between fields can vary by almost two orders of magnitude making predictions of total emissions highly site specific.

text: Carbon Emissions Pinch Analysis (CEPA) for emissions reduction in the New Zealand electricity sector Carbon Emissions Pinch Analysis (CEPA) is a recent extension of traditional thermal and mass pinch analysis to the area of emissions targeting and planning on a macro-scale (i.e. economy wide). This paper presents an extension to the current methodology that accounts for increased demand and a carbon pinch analysis of the New Zealand electricity industry while illustrating some of the issues with realising meaningful emissions reductions. The current large proportion of renewable generation (67% in 2007) complicates extensive reduction of carbon emissions from electricity generation. The largest growth in renewable generation is expected to come from geothermal generation followed by wind and hydro. A four fold increase in geothermal generation capacity is needed in addition to large amounts of new wind generation to reduce emissions to around 1990 levels and also meet projected demand. The expected expansion of geothermal generation in New Zealand raises issues of GHG emissions from the geothermal fields. The emissions factors between fields can vary by almost two orders of magnitude making predictions of total emissions highly site specific.

year: 2010

title: Synthesis study of size-controlled noble metal nanoparticle systems of Re, Ir, and Os using AOT-reverse microemulsion based methodologies

authors: Soleimani Zohr Shiri, Mohammad

abstract: This thesis presents a novel methodology for synthesizing stable, very small nanoparticles (NPs) of rhenium (Re), iridium (Ir), and osmium (Os) using a reverse microemulsion (AOT-ME) system, with AOT as the negatively charged surfactant to form and stabilize the MEs. These noble metals are among the least studied in their NP form, making this research a valuable contribution to the field.
An important initial finding was the identification of a sulfite ion impurity in commercially sourced AOT, most likely introduced during industrial preparation. The reason for the apparent ability of AOT to reduce certain metals, such as Re, was previously unknown among researchers. Although this impurity is present in low concentrations, it became significant when larger quantities of AOT were used to stabilize ME systems, acting as an unintended/hidden reducing agent. While purification with activated carbon could reduce the impurity, it came at a considerable cost of the AOT reagent.
Using the AOT-ME system, Re, Ir, and Os NPs were successfully synthesized under ambient conditions with precise control over size and size distribution. Systematic investigation of synthesis parameters—including the water-to-surfactant concentration ratio (W factor) and temperature—revealed that these factors had a significant impact on NP size and stability. Across all three metals, the effect of the W factor was consistent, with higher W values generating larger, more polydisperse particles. While the AOT-ME system effectively maintained colloidal stability and controlled particle size for all three metals, it also played a specific role in slowing the tendency of Re NPs to oxidise into perrhenate.
A range of advanced characterization techniques, including UV-Vis spectroscopy, ESI-MS, FE-SEM/EDX, and HR-TEM, were employed to thoroughly analyse the synthesized NPs. UV-Vis confirmed the successful reduction of the metal precursors, while FE-SEM/EDX provided valuable information on surface morphology and elemental composition. HR-TEM offered detailed insights into the size and crystallinity of the NPs. Additionally, ESI-MS helped investigate the chemical stability of the colloidal aqueous solutions.
This thesis contributes to the field of noble metal NP synthesis by offering a reproducible method for controlling NP size and stability within AOT-ME systems. The findings provide valuable insights for optimizing synthesis protocols and broaden the potential applications of Re, Ir, and Os NPs in catalysis and materials science.

text: Synthesis study of size-controlled noble metal nanoparticle systems of Re, Ir, and Os using AOT-reverse microemulsion based methodologies This thesis presents a novel methodology for synthesizing stable, very small nanoparticles (NPs) of rhenium (Re), iridium (Ir), and osmium (Os) using a reverse microemulsion (AOT-ME) system, with AOT as the negatively charged surfactant to form and stabilize the MEs. These noble metals are among the least studied in their NP form, making this research a valuable contribution to the field.
An important initial finding was the identification of a sulfite ion impurity in commercially sourced AOT, most likely introduced during industrial preparation. The reason for the apparent ability of AOT to reduce certain metals, such as Re, was previously unknown among researchers. Although this impurity is present in low concentrations, it became significant when larger quantities of AOT were used to stabilize ME systems, acting as an unintended/hidden reducing agent. While purification with activated carbon could reduce the impurity, it came at a considerable cost of the AOT reagent.
Using the AOT-ME system, Re, Ir, and Os NPs were successfully synthesized under ambient conditions with precise control over size and size distribution. Systematic investigation of synthesis parameters—including the water-to-surfactant concentration ratio (W factor) and temperature—revealed that these factors had a significant impact on NP size and stability. Across all three metals, the effect of the W factor was consistent, with higher W values generating larger, more polydisperse particles. While the AOT-ME system effectively maintained colloidal stability and controlled particle size for all three metals, it also played a specific role in slowing the tendency of Re NPs to oxidise into perrhenate.
A range of advanced characterization techniques, including UV-Vis spectroscopy, ESI-MS, FE-SEM/EDX, and HR-TEM, were employed to thoroughly analyse the synthesized NPs. UV-Vis confirmed the successful reduction of the metal precursors, while FE-SEM/EDX provided valuable information on surface morphology and elemental composition. HR-TEM offered detailed insights into the size and crystallinity of the NPs. Additionally, ESI-MS helped investigate the chemical stability of the colloidal aqueous solutions.
This thesis contributes to the field of noble metal NP synthesis by offering a reproducible method for controlling NP size and stability within AOT-ME systems. The findings provide valuable insights for optimizing synthesis protocols and broaden the potential applications of Re, Ir, and Os NPs in catalysis and materials science.

year: 2025

title: Te Kōpura

authors: Maxwell, Te Kahautu

abstract: He Hōnore, he korōria, he maungārongo ki runga ki te whenua, he whakaaro pai ki ngā tānagata katoa.


Ko te tāhu o tēnei tuhituhinga he titiro ki Te Hāhi Ringatū i runga o Whitianga marae. E rua noa iho ngā Rā Ringatū ka tū ki runga i tēnei marae, arā, ko Te Huamata, hei te tahi o Hune tēnā me Te Pure, hei te tahi o Nōema tēnā. I roto i te tuhituhingaroa nei ka titiro he aha I tae atu ai wēnei tikanga ki tēnei o ngā marae. Ka whakatakoto haere, i pēhea hoki ngā whakahaeretanga i te wā o ngā pakeke. Kātahi ka titiro ki ngā whakarerekētanga ki ngā tikanga i roto i te wā, ā, he aha i pērā ai. 
Kua tata ki te toru tekau tau mai i te whakakoretanga o Te Māratapu a Te Ringatū i roto i wāna whakahaerenga i Te Huamata me Te Pure. Ko tērā tūāhuatanga o Te Ringatū e kore nei e kitea e tēnei reanga tangata.
Tokoiti noa nei, me kī, ngā mōrehu o tērā whakatipuranga pakeke i kitea wērā tūāhuatanga e ora tonu ana. Nō reira i toko ake te whakaaro ki te rangahau, ki te kohikohi hoki i ngā kōrero i te hunga i rongo, i kite, i tipu ake hoki i roto i tērā Ao. He pekanga nui o te tuhinga nei kua titiro ki Te Huamata me Te Pure me wōna tapu, me wōna whakahaerenga ki runga o te marae o Whitianga.
Ki te whakawhāriki i ngā kōrero nei mō Te Ringatū ki runga o Whitianga kua tātaritia kia waru ngā pekanga o te tuhinga kia mārama ai ki te karu pānui i ngā kōrero; i pēhea tae atu ai Te Ringatū ki runga o Whitianga, i pēhea tāna kawe i ngā tikanga, ā, he aha i whakarerekēngia ai tāna kawe i Te Huamata me Te Pure i roto I te wā.

Tuatahi: Ki te kōrero mō Te Ringatū me hoki ki te tīmata maitanga o Te Ringatū. Ka tirohia, nā wai i tīmata, ā, he aha i tīmataria ai, me te whakaatu i wētahi āhuatanga i pā ki tōna Poropiti me wāna pononga i te tīmatatanga rā anō o Te Ringatū.

Tuarua: Ko te whai haere tēnei i ngā takahanga waewae o ngā tīpuna o Te Whānau-a-Apanui, ki te whai i Te Ringatū. Ka titiro he aha te take i huri ai a Te Whānau-a-Apanui ki ngā tikanga o Te Ringatū. Ka titiro anō hoki ki te taenga atu o Te Kooti me tana iwi Ringatū ki roto o Te Whānau-a-Apanui me wāna mahi ki a rātou i reira.

Tuatoru: Ka whakaatu i konei, he aha te take ko wātahi marae tokoiti noa iho o Te Whānau-a-Apanui ka noho hei marae Ringatū, mai i te taenga atu o Te Ringatū, aā, tae noa ki tēnei rā.
Tuawhā: I konei ka tae ki te pūtake o te tuhinga. Ka titiro i konei ki te taenga o ngā whakahaere Ringatū, arā, Te Huamata me Te Pure ki runga i te marae o Whitianga. Ka whakaatu i konei, he aha i tae atu ai wēnei tikanga ki tērā marae. Ka kite anē hoki he aha i karangatia ko Whitianga te marae pou mō Te Ringatū ki roto o Te Whānau-a-Apanui.
Tuarima: Ka tiro haeretia i konei ngā tikanga e pā ana ki Te Huamata me wōna whakahaere I ngā. tapu katoa e pā ana ki Te Huamata. Ka whakarārangitia ko ngā karakia me wōna kaupapa katoa kia kite ai te kaipānui i te hōhonutanga o tēnei tikanga a Te Ringatū. I konei ka kite anō hoki te kaipānui i ngā kōrero a ngā pakeke, nāna nei i kite, i tipu ake i roto i tērā tikanga.
Tuaono: Ka titiro i konei ko ngā whakahaere a Te Ringatū i tēnei tikanga, arā, Te Pure. Pērā anō ki te tipuranga tuarima, ka whakarārangitia ai ko ngā karakia me wōna kaupapa katoa kia kite ai te kaipānui i te tikanga o Te Pure, ā, he aha i pērā rawa ai te kaha whakapono o ngā pakeke ki tēnei tūāhuatanga, ko Te Pure.
Tuawhitu: I konei ka titiro ki a Paora Delamere me te take i whakarerekēngia ai e ia ngā tikanga tapu o Te Huamata me Te Pure. Ka titiro anō hoki ki wētahi āhuatanga hou i tīmataria ai e ia i waenganui i Te Ringatū whanui huri i Aotearoa.
Tuawaru: Ka tuituia ngā pekanga katoa ki te whakamārama i ngā kōrero kia eke katoa ki runga i te tāhūhū o te kōrero. Ka kitea te take i tīmataria ai Te Ringatu, arā ngā kairiri a Māori ki a tauiwi. Ā, pērā anō te take i huri ai a Te Whānau-a-Apanui ki ngā tikanga a Te Ringatū. Koira i hanake hoki ai ngā pakeke ki Ōtewa ki te pōhiri i a Te Kooti ki te rohe o Te Whānau-a-Apanui, nā te rauwhaitanga o te patu i ngā papatipu. Ko te hokitanga ki te haumoana o Te Whānau-a-Apanui, ko te hokinga anō hoki o Te Māratapu o Te Huamata, o Te Pure ki reira toka atu ai. Ka haere te wā, ā, nāwai rā ka poua wēnei tikanga a Te Ringatū ki Te Māratapu ki runga o Whitianga, ana, i tipu ake he tipu hou, he oranga hou, ā, he tikanga hou i te huringa o te wā.
Katoa wēnei kōrero hei whakaatu i te āhua o te taenga o Te Huamata me Te Pure ki runga o Whitianga marae, mai i te kunenga ake o te whakaaro ki te whai I wēnei tikanga, ā, tae noa ki te whakatinanatanga e haere ake nei, e haere ake. He rautau kua taha, he raurau tau e haere mai nei.

text: Te Kōpura He Hōnore, he korōria, he maungārongo ki runga ki te whenua, he whakaaro pai ki ngā tānagata katoa.


Ko te tāhu o tēnei tuhituhinga he titiro ki Te Hāhi Ringatū i runga o Whitianga marae. E rua noa iho ngā Rā Ringatū ka tū ki runga i tēnei marae, arā, ko Te Huamata, hei te tahi o Hune tēnā me Te Pure, hei te tahi o Nōema tēnā. I roto i te tuhituhingaroa nei ka titiro he aha I tae atu ai wēnei tikanga ki tēnei o ngā marae. Ka whakatakoto haere, i pēhea hoki ngā whakahaeretanga i te wā o ngā pakeke. Kātahi ka titiro ki ngā whakarerekētanga ki ngā tikanga i roto i te wā, ā, he aha i pērā ai. 
Kua tata ki te toru tekau tau mai i te whakakoretanga o Te Māratapu a Te Ringatū i roto i wāna whakahaerenga i Te Huamata me Te Pure. Ko tērā tūāhuatanga o Te Ringatū e kore nei e kitea e tēnei reanga tangata.
Tokoiti noa nei, me kī, ngā mōrehu o tērā whakatipuranga pakeke i kitea wērā tūāhuatanga e ora tonu ana. Nō reira i toko ake te whakaaro ki te rangahau, ki te kohikohi hoki i ngā kōrero i te hunga i rongo, i kite, i tipu ake hoki i roto i tērā Ao. He pekanga nui o te tuhinga nei kua titiro ki Te Huamata me Te Pure me wōna tapu, me wōna whakahaerenga ki runga o te marae o Whitianga.
Ki te whakawhāriki i ngā kōrero nei mō Te Ringatū ki runga o Whitianga kua tātaritia kia waru ngā pekanga o te tuhinga kia mārama ai ki te karu pānui i ngā kōrero; i pēhea tae atu ai Te Ringatū ki runga o Whitianga, i pēhea tāna kawe i ngā tikanga, ā, he aha i whakarerekēngia ai tāna kawe i Te Huamata me Te Pure i roto I te wā.

Tuatahi: Ki te kōrero mō Te Ringatū me hoki ki te tīmata maitanga o Te Ringatū. Ka tirohia, nā wai i tīmata, ā, he aha i tīmataria ai, me te whakaatu i wētahi āhuatanga i pā ki tōna Poropiti me wāna pononga i te tīmatatanga rā anō o Te Ringatū.

Tuarua: Ko te whai haere tēnei i ngā takahanga waewae o ngā tīpuna o Te Whānau-a-Apanui, ki te whai i Te Ringatū. Ka titiro he aha te take i huri ai a Te Whānau-a-Apanui ki ngā tikanga o Te Ringatū. Ka titiro anō hoki ki te taenga atu o Te Kooti me tana iwi Ringatū ki roto o Te Whānau-a-Apanui me wāna mahi ki a rātou i reira.

Tuatoru: Ka whakaatu i konei, he aha te take ko wātahi marae tokoiti noa iho o Te Whānau-a-Apanui ka noho hei marae Ringatū, mai i te taenga atu o Te Ringatū, aā, tae noa ki tēnei rā.
Tuawhā: I konei ka tae ki te pūtake o te tuhinga. Ka titiro i konei ki te taenga o ngā whakahaere Ringatū, arā, Te Huamata me Te Pure ki runga i te marae o Whitianga. Ka whakaatu i konei, he aha i tae atu ai wēnei tikanga ki tērā marae. Ka kite anē hoki he aha i karangatia ko Whitianga te marae pou mō Te Ringatū ki roto o Te Whānau-a-Apanui.
Tuarima: Ka tiro haeretia i konei ngā tikanga e pā ana ki Te Huamata me wōna whakahaere I ngā. tapu katoa e pā ana ki Te Huamata. Ka whakarārangitia ko ngā karakia me wōna kaupapa katoa kia kite ai te kaipānui i te hōhonutanga o tēnei tikanga a Te Ringatū. I konei ka kite anō hoki te kaipānui i ngā kōrero a ngā pakeke, nāna nei i kite, i tipu ake i roto i tērā tikanga.
Tuaono: Ka titiro i konei ko ngā whakahaere a Te Ringatū i tēnei tikanga, arā, Te Pure. Pērā anō ki te tipuranga tuarima, ka whakarārangitia ai ko ngā karakia me wōna kaupapa katoa kia kite ai te kaipānui i te tikanga o Te Pure, ā, he aha i pērā rawa ai te kaha whakapono o ngā pakeke ki tēnei tūāhuatanga, ko Te Pure.
Tuawhitu: I konei ka titiro ki a Paora Delamere me te take i whakarerekēngia ai e ia ngā tikanga tapu o Te Huamata me Te Pure. Ka titiro anō hoki ki wētahi āhuatanga hou i tīmataria ai e ia i waenganui i Te Ringatū whanui huri i Aotearoa.
Tuawaru: Ka tuituia ngā pekanga katoa ki te whakamārama i ngā kōrero kia eke katoa ki runga i te tāhūhū o te kōrero. Ka kitea te take i tīmataria ai Te Ringatu, arā ngā kairiri a Māori ki a tauiwi. Ā, pērā anō te take i huri ai a Te Whānau-a-Apanui ki ngā tikanga a Te Ringatū. Koira i hanake hoki ai ngā pakeke ki Ōtewa ki te pōhiri i a Te Kooti ki te rohe o Te Whānau-a-Apanui, nā te rauwhaitanga o te patu i ngā papatipu. Ko te hokitanga ki te haumoana o Te Whānau-a-Apanui, ko te hokinga anō hoki o Te Māratapu o Te Huamata, o Te Pure ki reira toka atu ai. Ka haere te wā, ā, nāwai rā ka poua wēnei tikanga a Te Ringatū ki Te Māratapu ki runga o Whitianga, ana, i tipu ake he tipu hou, he oranga hou, ā, he tikanga hou i te huringa o te wā.
Katoa wēnei kōrero hei whakaatu i te āhua o te taenga o Te Huamata me Te Pure ki runga o Whitianga marae, mai i te kunenga ake o te whakaaro ki te whai I wēnei tikanga, ā, tae noa ki te whakatinanatanga e haere ake nei, e haere ake. He rautau kua taha, he raurau tau e haere mai nei.

year: 1998