[Objectives]This study was conducted to deeply understand the effects of production process on the quality of new types of tobacco sheets with different flavors.[Methods]Based on the pilot production process of thick ...[Objectives]This study was conducted to deeply understand the effects of production process on the quality of new types of tobacco sheets with different flavors.[Methods]Based on the pilot production process of thick pulp method,four different flavors of tobacco sheets were sampled at several links in the production process,for the detection of the contents of the main components in the samples,including propylene glycol,glycerol,menthol and glyceryl triacetate,so as to explore the change trends of various components in the thick pulp process.[Results]The change laws of propylene glycol and glycerol contents had a very high similarity,showing a trend of first decreasing and increasing then.The changes of menthol content and glyceryl triacetate content were greatly affected by the specific flavor formula.As one of the indexes of the new tobacco evaluation system,the alcohol-to-ester ratio data need to be further improved in the actual production and application process.[Conclusions]This study provides basic data support for improving the quality of tobacco sheets.展开更多
A study on alkaline sulfite anthraquinone pulping of wheat straw indicated that the addition of formaldehyde could improve fine pulp yield effectively, enhance brightness of unbleached pulp, and decrease kappa number....A study on alkaline sulfite anthraquinone pulping of wheat straw indicated that the addition of formaldehyde could improve fine pulp yield effectively, enhance brightness of unbleached pulp, and decrease kappa number. Finally, the optimum conditions of this process were formed.展开更多
The process of producing dissolving pulp with SuperBatch cooking was introduced. The factors that affected the quality of the dissolving pulp and the corresponding operations were investigated.
A series of Reed Pulps were prepared in which the level of Non-Process Elements(NPEs), including calcium, manganese,copper,iron were seclectively enriched and depleted, these pulps were then oxygen delignification,and...A series of Reed Pulps were prepared in which the level of Non-Process Elements(NPEs), including calcium, manganese,copper,iron were seclectively enriched and depleted, these pulps were then oxygen delignification,and the pulps were characterized according to kappa number,viscosity,brightness. The results indicated that the enrichment of NPEs have an important effulence on delignification,pulp viscosity and brightness, iron is the most harmful during oxygen delignification but manganese is just like a kind of aid and can enhance brightness and delignification.展开更多
The paper is to study the TCF bleaching of high-yield chemical pulp of NS-AQ aspen(digester yield 63.7%, Kappa number 37.3, brightness 50.0%ISO, intrinsic viscosity 1,340ml/g). Under the suitable conditions(oxygen pre...The paper is to study the TCF bleaching of high-yield chemical pulp of NS-AQ aspen(digester yield 63.7%, Kappa number 37.3, brightness 50.0%ISO, intrinsic viscosity 1,340ml/g). Under the suitable conditions(oxygen pressure 0.6MPa, 85℃, 80min., NaOH 5%, MgSO4 0.3%, consistency 11%), oxygen delignification, can increase the brightness of pulp to 64.9%ISO, substantially decrease Kappa number to 9.11. Before the oxygen delignification pretreating pulp by acidic chelant(Qa)under conditions of pH 3.0, 30min, 40℃, DTPA 0.25%, consistency 15%, and after the Qa strengthening oxygen delignification by H2O2(Op, H2O2 2%)can increase the brightness of pulp to 77.1%ISO, decrease Kappa number and intrinsic viscosity to 6.36 and 984ml/g, respectively. After the Op, pretreat pulp by chelant once again(pH 6.0, 60℃, consistency 12%, other as the Qa), and following this pretreatment do bleach with 1% H2O2, namely using Qa-Op-Q-P bleaching sequence, resulting in the brightness 84.8%ISO, Kappa number 5.01, intrinsic viscosity 792ml/g, total bleaching loss 12.17% for bleached pulp.展开更多
基于相同的核算边界,分别构建采用A-D-E-RC法制浆联合生物质热电联产与常规碱法制浆联合燃煤热电联产的能量与碳排放模型。通过物流平衡及排放因子法联合实测数据测算出2种制浆联合厂的能耗及碳排放。结果表明,采用A-D-E-RC法制浆联合...基于相同的核算边界,分别构建采用A-D-E-RC法制浆联合生物质热电联产与常规碱法制浆联合燃煤热电联产的能量与碳排放模型。通过物流平衡及排放因子法联合实测数据测算出2种制浆联合厂的能耗及碳排放。结果表明,采用A-D-E-RC法制浆联合生物质热电联产工厂的单位产品能耗比常规碱法制浆联合工厂降低了26.8%。其中,碱回收单元降低了51.2%的能耗。采用A-D-E-RC法制浆联合生物质热电联产的单位产品碳排放量为1.72 t CO_(2)/Adt,且93.6%为生物质碳,总碳排放下降了31.6%,表明采用A-D-E-RC法制浆联合生物质热电联产具有显著的节能减排效应,为促进制浆联合企业的绿色可持续发展提供新的策略。展开更多
基金Supported by Science and Technology Project of Hubei Xinye reconstituted Tobacco Development Co.,Ltd.(2021JSZZ3BP2B046).
文摘[Objectives]This study was conducted to deeply understand the effects of production process on the quality of new types of tobacco sheets with different flavors.[Methods]Based on the pilot production process of thick pulp method,four different flavors of tobacco sheets were sampled at several links in the production process,for the detection of the contents of the main components in the samples,including propylene glycol,glycerol,menthol and glyceryl triacetate,so as to explore the change trends of various components in the thick pulp process.[Results]The change laws of propylene glycol and glycerol contents had a very high similarity,showing a trend of first decreasing and increasing then.The changes of menthol content and glyceryl triacetate content were greatly affected by the specific flavor formula.As one of the indexes of the new tobacco evaluation system,the alcohol-to-ester ratio data need to be further improved in the actual production and application process.[Conclusions]This study provides basic data support for improving the quality of tobacco sheets.
文摘A study on alkaline sulfite anthraquinone pulping of wheat straw indicated that the addition of formaldehyde could improve fine pulp yield effectively, enhance brightness of unbleached pulp, and decrease kappa number. Finally, the optimum conditions of this process were formed.
文摘The process of producing dissolving pulp with SuperBatch cooking was introduced. The factors that affected the quality of the dissolving pulp and the corresponding operations were investigated.
文摘A series of Reed Pulps were prepared in which the level of Non-Process Elements(NPEs), including calcium, manganese,copper,iron were seclectively enriched and depleted, these pulps were then oxygen delignification,and the pulps were characterized according to kappa number,viscosity,brightness. The results indicated that the enrichment of NPEs have an important effulence on delignification,pulp viscosity and brightness, iron is the most harmful during oxygen delignification but manganese is just like a kind of aid and can enhance brightness and delignification.
文摘The paper is to study the TCF bleaching of high-yield chemical pulp of NS-AQ aspen(digester yield 63.7%, Kappa number 37.3, brightness 50.0%ISO, intrinsic viscosity 1,340ml/g). Under the suitable conditions(oxygen pressure 0.6MPa, 85℃, 80min., NaOH 5%, MgSO4 0.3%, consistency 11%), oxygen delignification, can increase the brightness of pulp to 64.9%ISO, substantially decrease Kappa number to 9.11. Before the oxygen delignification pretreating pulp by acidic chelant(Qa)under conditions of pH 3.0, 30min, 40℃, DTPA 0.25%, consistency 15%, and after the Qa strengthening oxygen delignification by H2O2(Op, H2O2 2%)can increase the brightness of pulp to 77.1%ISO, decrease Kappa number and intrinsic viscosity to 6.36 and 984ml/g, respectively. After the Op, pretreat pulp by chelant once again(pH 6.0, 60℃, consistency 12%, other as the Qa), and following this pretreatment do bleach with 1% H2O2, namely using Qa-Op-Q-P bleaching sequence, resulting in the brightness 84.8%ISO, Kappa number 5.01, intrinsic viscosity 792ml/g, total bleaching loss 12.17% for bleached pulp.
文摘基于相同的核算边界,分别构建采用A-D-E-RC法制浆联合生物质热电联产与常规碱法制浆联合燃煤热电联产的能量与碳排放模型。通过物流平衡及排放因子法联合实测数据测算出2种制浆联合厂的能耗及碳排放。结果表明,采用A-D-E-RC法制浆联合生物质热电联产工厂的单位产品能耗比常规碱法制浆联合工厂降低了26.8%。其中,碱回收单元降低了51.2%的能耗。采用A-D-E-RC法制浆联合生物质热电联产的单位产品碳排放量为1.72 t CO_(2)/Adt,且93.6%为生物质碳,总碳排放下降了31.6%,表明采用A-D-E-RC法制浆联合生物质热电联产具有显著的节能减排效应,为促进制浆联合企业的绿色可持续发展提供新的策略。
